0001517413-26-000132 | 10-Q | XBRL Viewer

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (4,130)	$ 691
Reduction of unrecognized tax benefit resulting from lapse of applicable statute of limitations	$ 4,300

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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+ Details

Leases - Schedule of Components of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Leases [Abstract]
Operating lease cost	$ 7,394	$ 6,582
Variable lease cost	5,375	4,973
Total operating lease costs	$ 12,769	$ 11,555

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation and Consolidation The accompanying condensed consolidated financial statements and footnotes have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”), consistent in all material respects with those applied in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Securities and Exchange Commission (“SEC”) on February 25, 2026. The Company’s condensed consolidated financial statements include its accounts and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Company’s condensed consolidated financial statements are unaudited but include all adjustments of a normal recurring nature necessary for a fair presentation of its quarterly results. The Company’s condensed consolidated financial statements should be read in conjunction with the audited condensed consolidated financial statements and related notes in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets, liabilities, revenue, costs and expenses, and related disclosures. Actual results and outcomes could differ significantly from the Company’s estimates, judgments, and assumptions. Significant estimates, judgments, and assumptions used in these financial statements include, but are not limited to, those related to revenue, accounts receivable and related reserves, internal-use software development costs, the incremental borrowing rate related to the Company’s lease liabilities, fair value of assets acquired and liabilities assumed during business combinations, useful lives of property and equipment and acquired intangible assets, financial instruments, income tax reserves, and accounting for stock-based compensation. Estimates are periodically reviewed in light of changes in circumstances, facts, and experience. The effects of material revisions in estimates are reflected in the condensed consolidated financial statements in the period of change and prospectively from the date of the change in estimate. The Company has implemented software and hardware initiatives to manage its global network more efficiently and has determined, effective January 1, 2026, that the effective useful life of its servers has increased from five years to six years, As a result depreciation expense as well as net loss decreased by $3.3 million for the three months ended March 31, 2026. Significant Accounting Policies There have been no material changes to the Company’s significant accounting policies as compared to those described in “Note 2 – Summary of Significant Accounting Policies” of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. Recently Issued Accounting Pronouncements In November 2024, the Financial Accounting Standards Board ("FASB") issued ASU 2024-03 “Disaggregation of Income Statement Expenses,” which aims to improve the disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. The guidance is effective for the Company's annual periods beginning in 2027 and interim periods beginning in the first quarter of fiscal year 2028. The Company is currently evaluating the impact of the new guidance. In November 2024, the FASB issued ASU 2024-04 “Induced Conversions of Convertible Debt Instruments,” which amends ASC 470-202 to clarify the requirements related to accounting for the settlement of a debt instrument as an induced conversion. The guidance is effective for the Company's annual periods beginning in 2026 and interim periods within those annual reporting periods. The Company adopted the standard effective January 1, 2026 on a prospective basis. Adoption of the guidance did not have a material impact on the Company’s condensed consolidated financial statements. In September 2025, the FASB issued ASU 2025-06 “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software,” which aims to clarify and modernize the accounting for costs related to internal-use software. The guidance is effective for the Company's interim and annual periods beginning in 2028. The Company is currently evaluating the impact of the new guidance. Concentrations of Credit Risk Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash, cash equivalents, marketable securities and accounts receivable. The Company’s cash, cash equivalents, and marketable securities primarily consisted of money market funds, investment-grade commercial paper, corporate notes and bonds, U.S. treasury securities, municipal bonds, agency bonds, and certificates of deposit. The primary focus of its investment strategy is to preserve capital and meet liquidity requirements. The Company’s investment policy limits the amount of credit exposure with any one financial institution or commercial issuer. The Company maintains deposits in federally insured financial institutions in excess of federally insured limits. The Company is exposed to credit risk in the event of default by the financial institutions holding its cash and cash equivalents to the extent recorded in the balance sheets. Concentrations of credit risk with respect to accounts receivable are primarily limited to certain customers to which the Company makes substantial sales. The Company’s customer base consists of a large number of geographically dispersed customers diversified across several industries. No single customer accounted for more than 10% of the Company's revenue for the three months ended March 31, 2026 and 2025. No affiliated customers that are business units of a single company generated more than 10% of revenue for the three months ended March 31, 2026 and 2025. No single customer accounted for more than 10% of the total accounts receivable balance as of March 31, 2026 and December 31, 2025. No affiliated customers that are business units of a single company generated an aggregate of more than 10% of the Company's accounts receivable balance as of March 31, 2026 and December 31, 2025.

Nature of Business	3 Months Ended
Nature of Business	Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business Fastly, Inc. is an edge cloud platform that can process, serve, and secure its customers' applications as close to their end users as possible. The Company was incorporated in Delaware in 2011 and is headquartered in San Francisco, California. As used herein, “Fastly,” “the Company,” “its,” and similar terms include Fastly, Inc. and its subsidiaries, unless the context indicates otherwise.

Stockholders' Equity - Equity Incentive Plans (Narrative) (Details)	3 Months Ended
	Mar. 31, 2026 plan shares	Dec. 31, 2025 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans \| plan	5
Common stock, shares issued (in shares)	156,400,000	151,500,000
Common stock, shares outstanding (in shares)	156,400,000	151,500,000
Signal Sciences 2014 Equity Stock Options Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested stock options assumed (in shares)	251,754
2019 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares available for future issuance (in shares)	8,900,000	5,800,000
2025 Employment Inducement Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares available for future issuance (in shares)	300,000	500,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Stockholders' Equity - Stock-Based Compensation Expense (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Stockholders' Equity Note [Abstract]
Capitalized stock-based compensation	$ 1.5	$ 1.7

Leases - Schedule of Other Information (Details)	Mar. 31, 2026	Dec. 31, 2025
Weighted Average Remaining Lease Term (in years):
Operating leases	4 years 2 months 8 days	4 years 4 months 20 days
Weighted Average Discount Rate:
Operating leases	7.12%	7.16%

Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill

As of March 31, 2026 and December 31, 2025, the Company’s goodwill was $670.4 million. The Company did not record an impairment charge on goodwill during either of the three months ended March 31, 2026 and 2025.

Intangible Assets, net

As of March 31, 2026 and December 31, 2025, the Company’s intangible assets consisted of the following:


	As of March 31, 2026						As of December 31, 2025
	Gross carrying value		Accumulated amortization		Net carrying value		Gross carrying value		Accumulated amortization		Net carrying value
	(in thousands)
Intangible assets:
Customer relationships	$	69,100	$	(47,507)	$	21,593	$	69,100	$	(45,347)	$	23,753
Developed technology	49,500		(49,500)		—		49,500		(49,500)		—
Trade names	3,300		(3,300)		—		3,300		(3,300)		—
Internet protocol addresses	4,984		(3,083)		1,901		4,984		(2,966)		2,018
Total intangible assets	$	126,884	$	(103,390)	$	23,494	$	126,884	$	(101,113)	$	25,771

The Company’s customer relationships, developed technology, trade names, and internet protocol addresses represent intangible assets subject to amortization. Amortization expense was $2.3 million and $4.9 million for the three months ended March 31, 2026 and 2025, respectively.

The Company did not purchase any intangible assets during either of the three months ended March 31, 2026 and 2025.

The Company did not record an impairment charge on its intangible assets for the three months ended March 31, 2026 or the three months ended March 31, 2025.

The expected amortization expense of intangible assets subject to amortization as of March 31, 2026 is as follows:


	As of March 31, 2026
	(in thousands)
Remainder of 2026	$	6,788
2027	9,051
2028	6,891
2029	378
2030	281
Thereafter	105
Total	$	23,494

Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2026

Balance Sheet Related Disclosures [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Computer and networking equipment	$	313,945	$	278,181
Leasehold improvements	8,174		8,181
Furniture and fixtures	2,573		2,430
Office equipment	1,225		1,232
Internal-use software	153,460		148,419
Property and equipment, gross	$	479,377	$	438,443
Accumulated depreciation and amortization	(263,466)		(251,658)
Property and equipment, net	$	215,911	$	186,785

Schedule of Other Assets

Other assets consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Deferred contract costs, net	$	45,047	$	47,586
Other assets	10,937		10,203
Total other assets	$	55,984	$	57,789

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Prepaid expenses	$	17,883	$	16,737
Other current assets	11,677		10,184
Total	$	29,560	$	26,921

Schedule of Accrued Expenses

Accrued expenses consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Accrued compensation and related benefits	$	19,992	$	46,611
Accrued colocation and bandwidth costs	15,997		13,944
Other tax liabilities	5,167		4,800
Other accrued expenses	4,367		5,314
Total accrued expenses	$	45,523	$	70,669

Schedule of Other Current Liabilities

Other current liabilities consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Accrued computer and networking equipment	365		413
Customer deposits	7,004		6,115
Other current liabilities	3,875		971
Total other current liabilities	$	11,244	$	7,499

Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2026

Stockholders' Equity Note [Abstract]

Schedule of RSU and PSUs Activity

The following table summarizes RSU activity during the three months ended March 31, 2026:


	Number of Shares	Weighted-Average Grant Date Fair Value Per Share
	(in thousands)
Unvested RSUs as of December 31, 2025	14,001	$	8.25
Granted	4,192	17.75
Vested	(4,160)	14.09
Cancelled/forfeited	(484)	8.34
Unvested RSUs as of March 31, 2026	13,549	$	9.39


	Number of Shares	Weighted-Average Grant Date Fair Value Per Share
	(in thousands)
Nonvested PSUs as of December 31, 2025	1,445	$	7.08
Granted	1,039	20.04
Vested	(448)	7.13
Cancelled/forfeited	(184)	6.98
Nonvested PSUs as of March 31, 2026	1,852	$	14.35

Schedule of Stock-Based Compensation Expense

The following table summarizes the components of total stock-based compensation expense included in the accompanying condensed consolidated statements of operations:


	Three months ended March 31,
	2026		2025
	(in thousands)
Cost of revenue	$	2,536	$	1,939
Research and development	10,030		8,893
Sales and marketing	9,353		6,693
General and administrative	13,062		8,057
Total stock-based compensation expense	$	34,981	$	25,582

Balance Sheet Information - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Related Disclosures [Abstract]
Prepaid expenses	$ 17,883	$ 16,737
Other current assets	11,677	10,184
Total	$ 29,560	$ 26,921

Revenue - Narrative (Details)	3 Months Ended
Revenue - Narrative (Details)	Mar. 31, 2026 product_line
Revenue from Contract with Customer [Abstract]
Number of product lines	3
Revenue, performance obligation, description of payment terms	The Company’s payment terms and conditions vary by contract type and generally range from 30 to 90 days.

Balance Sheet Information - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 479,377	$ 438,443
Accumulated depreciation and amortization	(263,466)	(251,658)
Property and equipment, net	215,911	186,785
Computer and networking equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	313,945	278,181
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,174	8,181
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,573	2,430
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,225	1,232
Internal-use software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 153,460	$ 148,419

Revenue - Schedule of Contract Assets and Liabilities and Revenue Recognized (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Revenue from Contract with Customer [Abstract]
Contract assets	$ 1,953		$ 1,668
Contract liabilities	42,701		$ 40,819
Contract with Customer, Liability
Revenue recognized in the period from amounts included in contract liability at the beginning of the period	$ 14,567	$ 11,594

Revenue - Schedule of Revenue by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 173,021	$ 144,474
Network Services
Disaggregation of Revenue [Line Items]
Total revenue	126,237	113,229
Security
Disaggregation of Revenue [Line Items]
Total revenue	38,762	26,436
Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 8,022	$ 4,809

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Revenue

3 Months Ended

Mar. 31, 2026

Revenue from Contract with Customer [Abstract]

Revenue

Disaggregation of Revenue

Revenue by geography is based on the billing address of the customer. Aside from the United States, no other single country accounted for more than 10% of revenue for the three months ended March 31, 2026 and 2025. The following table presents the Company’s net revenue by geographic region:


	Three months ended March 31,
	2026		2025
	(in thousands)
United States	$	122,866	$	110,531
All other countries	50,155		33,943
Total revenue	$	173,021	$	144,474

The Company reports its revenue by three product lines: Network Services, Security, and Other. Network Services include solutions designed to improve performance of websites, apps, application programming interfaces (“APIs”), and digital media. Security includes products designed to protect websites, apps, APIs, and users. Other includes Compute solutions that allow developers to build and deploy modern web applications on Fastly's edge cloud platform and Observability solutions that provide real-time logs, data, and metrics streamed from Fastly's edge platform for actionable insights. The following table presents the Company’s revenue by product line:


	Three months ended March 31,
	2026		2025
	(in thousands)
Network Services	$	126,237	$	113,229
Security	38,762		26,436
Other	8,022		4,809
Total revenue	$	173,021	$	144,474

Contract Balances

The timing of revenue recognition may differ from the timing of invoicing to customers. The Company’s payment terms and conditions vary by contract type and generally range from 30 to 90 days.

The Company records a contract asset, or unbilled receivable, when a contractual right to consideration exists for both completed and partially completed performance obligations that may not have been invoiced. Contract assets are typically related to the Company's subscription services and platform usage. Contract assets are included in accounts receivable, net on the Company's condensed consolidated balance sheets.

The Company records a contract liability, or deferred revenue, when a contract is billed to customers in advance of revenue being recognized. Deferred revenue primarily consists of the unearned portions of billings for the Company’s security subscription services and the unearned portion of committed edge cloud platform usage. Contract liabilities are included in deferred revenue for the current portion and other long term liabilities for the long-term portion on the condensed consolidated balance sheets.

The following table presents the Company’s contract assets and contract liabilities as of March 31, 2026 and as of December 31, 2025:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Contract assets	$	1,953	$	1,668
Contract liabilities	$	42,701	$	40,819

The following table presents revenue recognized during the three months ended March 31, 2026 and 2025 from amounts included in contract liability at the beginning of the period:


	Three months ended March 31,
	2026		2025
	(in thousands)
Revenue recognized in the period from amounts included in contract liability at the beginning of the period	$	14,567	$	11,594

Remaining Performance Obligations (“RPO”)

Revenue allocated to remaining performance obligations represents deferred revenue and amounts that were and will be invoiced and recognized as revenue in future periods for non-cancelable subscription arrangements and usage commitments. The Company’s RPO excludes performance obligations from on-demand arrangements when there are no minimum purchase commitments associated with these arrangements.

As of March 31, 2026, the aggregate amount of the transaction price in our contracts allocated to remaining performance obligations that are unsatisfied or partially unsatisfied was $368.7 million. This amount includes future committed revenue for periods within current contracts with customers, as well as deferred revenue arising from consideration invoiced for which the related performance obligations have not been satisfied. As of March 31, 2026, the Company expects to recognize approximately 75% of its remaining performance obligations over the next 12 months. The Company’s typical contractual term with its customers is one year, although terms may vary by contract.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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+ Details

Segment and Geographic Information (Tables)

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

Schedule of Property and Equipment and Operating Lease Right-of-Use Assets, Net by Geographic Area

The Company’s property and equipment and operating lease right-of-use assets, each net, by geographic area were as follows:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
United States	$	187,453	$	168,887
All other countries	86,155		69,965
Total long-lived assets	$	273,608	$	238,852

Balance Sheet Information - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 11,900	$ 15,200
Amortization of deferred contract costs	4,758	4,850
Internal-use software
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 5,900	$ 5,600

Leases - Narrative (Details) $ in Millions	3 Months Ended
Leases - Narrative (Details) $ in Millions	Mar. 31, 2026 USD ($)
Lessee, Lease, Description [Line Items]
Subleases, remaining lease terms (in years)	4 years
Lease not yet commenced, commitment amount	$ 3.5
Lease not yet commenced, term of contract (in years)	3 years
Minimum
Lessee, Lease, Description [Line Items]
Operating leases, remaining lease terms (in years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating leases, remaining lease terms (in years)	8 years

Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2026

Commitments and Contingencies Disclosure [Abstract]

Schedule of Purchase Commitments

Aside from the Company’s finance and operating lease commitments, including its colocation operating commitments, which have been disclosed in Note 6 — Leases, the minimum future commitments related to the Company's purchase commitments as of March 31, 2026 were as follows:


	Cost of Revenue Commitments		Operating Expense Commitments		Total Purchase Commitments
	(in thousands)
Remainder of 2026	$	25,036	$	17,445	$	42,481
2027	18,024		14,430		32,454
2028	4,491		9,109		13,600
2029	20		87		107
2030	—		96		96
Thereafter	—		—		—
Total	$	47,571	$	41,167	$	88,738

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]
Sales and use tax accrued	$ 5.2	$ 4.8

Stockholders' Equity - PSUs (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 34,981	$ 25,582
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 2,000	$ 800

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Investments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

Schedule of Available-For-Sale Investments

The following table summarizes adjusted cost, gross unrealized gains and losses, and fair value related to cash equivalents and available-for-sale securities on the accompanying condensed consolidated balance sheets as of March 31, 2026 and December 31, 2025:


	As of March 31, 2026
									Reported as:
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value		Cash and cash equivalents		Marketable securities:
	(in thousands)
Cash	$	54,382	$	—	$	—	$	54,382	$	54,382	$	—
Level 1:
Money market funds	63,397		—		—		63,397		63,397		—
Level 2:
U.S. Treasury securities	29,900		4		(13)		29,891		1,999		27,892
Corporate notes and bonds	87,261		—		(197)		87,064		2,157		84,907
Commercial paper	92,962		—		(107)		92,855		24,235		68,620
Agency Bonds	200		—		—		200		—		200
Municipal Securities	600		—		—		600		500		100
Certificates of deposit	2,100		—		(1)		2,099		—		2,100
Total	$	330,802	$	4	$	(318)	$	330,488	$	146,670	$	183,819


	As of December 31, 2025
									Reported as:
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value		Cash and cash equivalents		Marketable securities:
	(in thousands)
Cash	$	87,743	$	—	$	—	$	87,743	$	87,743	$	—
Level 1:
Money market funds	44,032		—		—		44,032		44,032		—
Level 2:
U.S. Treasury securities	64,273		27		—		64,300		8,290		56,010
Corporate notes and bonds	50,942		19		—		50,961		4,570		46,391
Commercial paper	111,706		20		(2)		111,724		33,928		77,796
Municipal Securities	1,600		—		—		1,600		1,600		—
Certificates of deposit	1,399		—		—		1,399		400		999
Total	$	361,695	$	66	$	(2)	$	361,759	$	180,563	$	181,196

Schedule of Cash and Cash Equivalents


	As of March 31, 2026
									Reported as:
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value		Cash and cash equivalents		Marketable securities:
	(in thousands)
Cash	$	54,382	$	—	$	—	$	54,382	$	54,382	$	—
Level 1:
Money market funds	63,397		—		—		63,397		63,397		—
Level 2:
U.S. Treasury securities	29,900		4		(13)		29,891		1,999		27,892
Corporate notes and bonds	87,261		—		(197)		87,064		2,157		84,907
Commercial paper	92,962		—		(107)		92,855		24,235		68,620
Agency Bonds	200		—		—		200		—		200
Municipal Securities	600		—		—		600		500		100
Certificates of deposit	2,100		—		(1)		2,099		—		2,100
Total	$	330,802	$	4	$	(318)	$	330,488	$	146,670	$	183,819


	As of December 31, 2025
									Reported as:
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value		Cash and cash equivalents		Marketable securities:
	(in thousands)
Cash	$	87,743	$	—	$	—	$	87,743	$	87,743	$	—
Level 1:
Money market funds	44,032		—		—		44,032		44,032		—
Level 2:
U.S. Treasury securities	64,273		27		—		64,300		8,290		56,010
Corporate notes and bonds	50,942		19		—		50,961		4,570		46,391
Commercial paper	111,706		20		(2)		111,724		33,928		77,796
Municipal Securities	1,600		—		—		1,600		1,600		—
Certificates of deposit	1,399		—		—		1,399		400		999
Total	$	361,695	$	66	$	(2)	$	361,759	$	180,563	$	181,196

- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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-Name Accounting Standards Codification
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+ Details

Investments and Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	$ 146,670	$ 180,563
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Gross Unrealized Gain	4	66
Gross Unrealized Loss	(318)	(2)
Amortized Cost	330,802	361,695
Fair Value	330,488	361,759
Cash and cash equivalents
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	146,670	180,563
Marketable securities:
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	183,819	181,196
Level 2: \| U.S. Treasury securities
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Amortized Cost	29,900	64,273
Gross Unrealized Gain	4	27
Gross Unrealized Loss	(13)	0
Fair Value	29,891	64,300
Level 2: \| U.S. Treasury securities \| Cash and cash equivalents
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	1,999	8,290
Level 2: \| U.S. Treasury securities \| Marketable securities:
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	27,892	56,010
Level 2: \| Corporate notes and bonds
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Amortized Cost	87,261	50,942
Gross Unrealized Gain	0	19
Gross Unrealized Loss	(197)	0
Fair Value	87,064	50,961
Level 2: \| Corporate notes and bonds \| Cash and cash equivalents
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	2,157	4,570
Level 2: \| Corporate notes and bonds \| Marketable securities:
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	84,907	46,391
Level 2: \| Commercial paper
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Amortized Cost	92,962	111,706
Gross Unrealized Gain	0	20
Gross Unrealized Loss	(107)	(2)
Fair Value	92,855	111,724
Level 2: \| Commercial paper \| Cash and cash equivalents
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	24,235	33,928
Level 2: \| Commercial paper \| Marketable securities:
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	68,620	77,796
Level 2: \| Agency Bonds
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Amortized Cost	200
Gross Unrealized Gain	0
Gross Unrealized Loss	0
Fair Value	200
Level 2: \| Agency Bonds \| Cash and cash equivalents
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	0
Level 2: \| Agency Bonds \| Marketable securities:
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	200
Level 2: \| Municipal Securities
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Amortized Cost	600	1,600
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	600	1,600
Level 2: \| Municipal Securities \| Cash and cash equivalents
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	500	1,600
Level 2: \| Municipal Securities \| Marketable securities:
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	100	0
Level 2: \| Certificates of deposit
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Amortized Cost	2,100	1,399
Gross Unrealized Gain	0	0
Gross Unrealized Loss	(1)	0
Fair Value	2,099	1,399
Level 2: \| Certificates of deposit \| Cash and cash equivalents
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	0	400
Level 2: \| Certificates of deposit \| Marketable securities:
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Fair Value	2,100	999
Cash
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	54,382	87,743
Cash and cash equivalents, fair value	54,382	87,743
Cash \| Cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents, fair value	54,382	87,743
Cash \| Marketable securities:
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents, fair value	0	0
Money market funds \| Level 1:
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	63,397	44,032
Cash and cash equivalents, fair value	63,397	44,032
Money market funds \| Level 1: \| Cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents, fair value	63,397	44,032
Money market funds \| Level 1: \| Marketable securities:
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents, fair value	$ 0	$ 0

Stockholders' Equity - Restricted Stock Units (“RSUs”) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 34,981	$ 25,582
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 22,600	$ 21,900
Minimum \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Minimum \| RSUs \| First Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Award vesting percentage	25.00%
Minimum \| RSUs \| Remaining Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	24 months
Maximum \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Maximum \| RSUs \| First Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Award vesting percentage	33.00%
Maximum \| RSUs \| Remaining Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	36 months

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Goodwill and Intangible Assets - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 670,356,000		$ 670,356,000
Impairment charge on goodwill	0	$ 0
Amortization expense	2,277,000	4,900,000
Purchase of intangible assets	0	0
Impairment charge of intangible assets	$ 0	$ 0

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

- Definition

Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References + Details

Stockholders' Equity

3 Months Ended

Mar. 31, 2026

Stockholders' Equity Note [Abstract]

Stockholders' Equity

Equity Incentive Plans

The Company maintains five equity incentive plans: the 2019 Equity Incentive Plan (the “2019 Plan”), 2011 Equity Incentive Plan (“2011 Plan”), 2019 Employee Stock Purchase Plan (“ESPP”), the Signal Sciences Corp. 2014 Stock Option and Grant Plan, as amended (the “Signal Plan”), and the 2025 Employment Inducement Incentive Plan (the "2025 Inducement Plan"). The 2019 Plan became effective in May 2019 and replaced the 2011 Plan. The Company’s 2019 Plan provides for the issuance of incentive stock options, non-statutory stock options, restricted stock units, performance-based stock awards, and other forms of equity compensation, which are collectively referred to as stock awards to its employees, directors, and consultants. The Signal Plan includes 251,754 registered shares which can be exercised to purchase shares of Fastly’s common stock. The 2025 Inducement Plan provides for the grant of non-statutory stock options, restricted stock units, performance based stock awards, and other forms of equity compensation.

As of March 31, 2026 and December 31, 2025, there were 8.9 million and 5.8 million shares of common stock available for issuance under the 2019 Plan, respectively. As of March 31, 2026 and December 31, 2025, a total of 0.3 million shares and 0.5 million shares were available for grant under the 2025 Inducement Plan, respectively. As of March 31, 2026 and December 31, 2025, 156.4 million and 151.5 million shares of common stock were issued and outstanding, respectively.

Restricted Stock Units (“RSUs”)

The Company began granting RSUs under the 2019 Plan during the fiscal year ended December 31, 2019 as well as under the 2025 Inducement Plan during the three months ended September 30, 2025. The fair value of RSUs is based on the grant date fair value and is expensed on a straight-line basis over the applicable vesting period. RSUs granted to new hires typically vest over three or four years, at the rate of 33% or 25%, respectively, on the first anniversary of the vesting start date and ratably on a quarterly basis over the remaining 24-month or 36-month period thereafter, respectively. RSUs granted to existing employees typically vest in equal quarterly installments over a three or four-year service period. All vesting is contingent on continued service. Forfeitures are recognized as they occur.

The following table summarizes RSU activity during the three months ended March 31, 2026:


	Number of Shares	Weighted-Average Grant Date Fair Value Per Share
	(in thousands)
Unvested RSUs as of December 31, 2025	14,001	$	8.25
Granted	4,192	17.75
Vested	(4,160)	14.09
Cancelled/forfeited	(484)	8.34
Unvested RSUs as of March 31, 2026	13,549	$	9.39

During the three months ended March 31, 2026 and 2025, the Company recognized stock-based compensation expense related to RSUs of $22.6 million and $21.9 million, respectively.

Performance-Based Restricted Stock Units (“PSUs”)

Performance Stock Awards for Executive Officers (“Executive PSUs”)

Pursuant to the Company’s 2019 Plan, the Company grants certain employees shares of Executive PSUs, which are to vest based on the level of achievement of certain Company-wide targets related to the Company’s operating plan for the relevant fiscal year. The Company has accounted for these awards as equity-based awards and will recognize stock-based compensation expense over the employees’ requisite service period based on the expected attainment of the Company-wide targets as of the end of each reporting period.


	Number of Shares	Weighted-Average Grant Date Fair Value Per Share
	(in thousands)
Nonvested PSUs as of December 31, 2025	1,445	$	7.08
Granted	1,039	20.04
Vested	(448)	7.13
Cancelled/forfeited	(184)	6.98
Nonvested PSUs as of March 31, 2026	1,852	$	14.35

During the three months ended March 31, 2026 and 2025, the Company recognized $2.0 million and $0.8 million of stock-based compensation expense associated with these awards, respectively.

Company-wide Bonus Program (“Bonus Program”)

In February 2025, the Compensation Committee approved a Bonus Program, including performance targets, to most of the Company’s employees on active payroll in fiscal year 2025 (“2025 Bonus Program”). Shares awarded under the program were paid out in February 2026 in fully vested RSUs and based on the final attainment of Company-wide performance targets which were tied to its operating plan for fiscal year 2025. The Company recognized stock-based compensation expense over the employees' requisite service period, based on the final attainment of the Company-wide targets. In February 2026, the Company paid out 2.2 million restricted stock units associated with the 2025 Bonus Program, and correspondingly recorded a charge to additional paid-in-capital of $39.5 million.

In February 2026, the Compensation Committee approved a Bonus Program, including performance targets, for the current fiscal year to most of the Company’s employees on active payroll in fiscal year 2026 (“2026 Bonus Program”). Shares awarded under the program will be in fully vested RSUs and will be based on the final attainment of Company-wide performance targets which are tied to its operating plan for fiscal year 2026. The payout of the 2026 Bonus Program will vary linearly between 50%, 100%, and 150% based on the achievement of these targets. Employees are required to be employed through the payout date to earn the awards. The Company has accounted for these awards as liability-based awards, since the monetary value of the obligation associated with the award is based predominantly on a fixed monetary amount known at inception, and it has an unconditional obligation that it must or may settle by issuing a variable number of its equity shares. The Company is recognizing the stock-based compensation expense over the employees requisite service period, based on the expected attainment of the Company-wide targets as of the end of each reporting period.

During the three months ended March 31, 2026 and 2025, the Company recognized $8.5 million and $3.7 million of stock-based compensation expense associated with the Bonus Programs, respectively.

Employee Stock Purchase Plan

The ESPP allows eligible employees to purchase shares of the Company’s common stock through payroll deductions of up to 15% of their eligible compensation. The ESPP provides for six-month offering periods, commencing in May and November of each year. At the end of each offering period employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the date of purchase.

During the three months ended March 31, 2026 and 2025, the Company recognized $0.9 million and $0.1 million in stock-based compensation expense related to the ESPP, respectively. No common stock was issued under the ESPP in either of the three months ended March 31, 2026 and 2025.

Stock-Based Compensation Expense

The following table summarizes the components of total stock-based compensation expense included in the accompanying condensed consolidated statements of operations:


	Three months ended March 31,
	2026		2025
	(in thousands)
Cost of revenue	$	2,536	$	1,939
Research and development	10,030		8,893
Sales and marketing	9,353		6,693
General and administrative	13,062		8,057
Total stock-based compensation expense	$	34,981	$	25,582

For the three months ended March 31, 2026 and 2025, the Company capitalized $1.5 million and $1.7 million of stock-based compensation expense, respectively.

Balance Sheet Information - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Related Disclosures [Abstract]
Accrued compensation and related benefits	$ 19,992	$ 46,611
Accrued colocation and bandwidth costs	15,997	13,944
Other tax liabilities	5,167	4,800
Other accrued expenses	4,367	5,314
Total accrued expenses	$ 45,523	$ 70,669

Debt Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Debt Disclosure [Abstract]
Interest expense related to debt obligations	$ 3.3	$ 3.1
Total estimated fair value of the notes	$ 653.3		$ 379.5

- Definition

Fair value portion of notes payable.

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+ Details

Debt Instruments - Convertible Senior Notes (Narrative) (Details) - Convertible Debt - USD ($) $ in Thousands		12 Months Ended
	Mar. 05, 2021	Dec. 31, 2025	Dec. 31, 2024	Mar. 31, 2026	Dec. 31, 2023	May 25, 2022
Debt Instrument [Line Items]
Aggregate principal amount				$ 330,000
2026 Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 948,800
Interest rate (as percent)	0.00%
Debt instrument, face amount, additional principal issuable	$ 123,800
Net proceeds from issuance of convertible notes	$ 930,000
Repurchased face amount		$ 150,000			$ 367,300	$ 235,000
Aggregate cash repurchase price		148,900			309,100	176,400
Aggregate transaction costs					$ 2,000	$ 700
Extinguishment of debt			$ 157,900
Net gain on debt extinguishment		900
2028 Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 150,000	$ 150,000
Interest rate (as percent)			7.75%	7.75%
2030 Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 180,000		$ 180,000
Interest rate (as percent)		0.00%		0.00%

Debt Instruments - Schedule of Conversion Rights of Notes (Details) - Convertible Debt	3 Months Ended
	Mar. 31, 2026 $ / shares
2028 Notes
Debt Instrument [Line Items]
Conversion Rate	0.0506586
Conversion Price per share (in dollars per share)	$ 19.74
2030 Notes
Debt Instrument [Line Items]
Conversion Rate	0.655136
Conversion Price per share (in dollars per share)	$ 15.26

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Goodwill and Intangible Assets - Schedule of Expected Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2026	$ 6,788
2027	9,051
2028	6,891
2029	378
2030	281
Thereafter	105
Net carrying value	$ 23,494	$ 25,771

Commitments and Contingencies

3 Months Ended

Mar. 31, 2026

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Purchase Commitments

As of March 31, 2026, the Company had long-term commitments for cost of revenue related agreements (i.e., bandwidth usage, peering and other managed services with various networks, fixed asset vendors, Internet service providers and other third-party vendors). The Company also has non-cost of revenue long-term commitments for various non-cancelable agreements.


	Cost of Revenue Commitments		Operating Expense Commitments		Total Purchase Commitments
	(in thousands)
Remainder of 2026	$	25,036	$	17,445	$	42,481
2027	18,024		14,430		32,454
2028	4,491		9,109		13,600
2029	20		87		107
2030	—		96		96
Thereafter	—		—		—
Total	$	47,571	$	41,167	$	88,738

Sales and Use Tax

The Company conducts its operations in many tax jurisdictions throughout the United States. In some of these jurisdictions the Company is subject to indirect taxes, such as sales and use taxes, and may be subject to certain other taxes. The Company has recorded a provision for its tax exposure in these jurisdictions when it is both probable that a liability has been incurred and the amount of the exposure can be reasonably estimated. The Company has accrued $5.2 million and $4.8 million as of March 31, 2026 and December 31, 2025, respectively, for sales and use tax. These estimates are based on several key assumptions, including the taxability of the Company’s operations and the jurisdictions in which the Company believes it has nexus. In the event these jurisdictions challenge the Company’s assumptions and analysis, its actual exposure could differ materially from its current estimates.

Legal Matters

From time to time, the Company has been and may be subject to legal proceedings and claims. Such matters are subject to many uncertainties and outcomes are not predictable. The Company accrues for contingencies when it believes that a loss is probable and that the Company can reasonably estimate the amount of any such loss.

On May 24, 2024, a purported securities class action lawsuit was filed in the United States District Court for the Northern District of California, captioned Ken Kula v. Fastly, Inc., et al. (Case No. 4:24-cv-03170), naming the Company and certain of its officers as defendants. Motions for lead plaintiff were filed on July 23, 2024. On August 22, 2024, the court appointed lead plaintiff (“Lead Plaintiff”) and lead counsel. On November 1, 2024, Lead Plaintiff filed an amended complaint. The amended complaint alleges violations of Section 10(b) and 20(a) of the Exchange Act purportedly on behalf of all those who purchased or acquired Fastly securities between November 15, 2023 and August 7, 2024. The complaint seeks unspecified compensatory damages, and other relief. Defendants filed a motion to dismiss on January 15, 2025. Lead Plaintiff filed an opposition to the defendants’ motion to dismiss on March 17, 2025. Defendants filed a reply in support of the motion to dismiss on April 30, 2025. On September 24, 2025, the court issued an order granting in part and denying in part the motion to dismiss. On October 24, 2025, Lead Plaintiff filed a second amended complaint. On December 9, 2025, Defendants filed a motion to dismiss the second amended complaint. On January 26, 2026, Lead Plaintiff filed an opposition. Defendants filed a reply in support of the motion to dismiss the second amended complaint on February 19, 2026. A hearing scheduled for April 30, 2026 on Defendants’ motion to dismiss the second amended complaint was vacated, and the Company is awaiting a ruling on the motion. It is possible that additional lawsuits will be filed, or allegations made by stockholders, regarding these same or other matters and also naming as defendants the Company and its officers and directors.

On June 12, 2024, certain of the Company’s officers and directors were named as defendants in a stockholder derivative action filed in the United States District Court for the Northern District of California, captioned Roy v. Nightingale, et al. (Case No. 3:24-cv-03549-JCS). On July 1, 2024, a stockholder derivative complaint was also filed against certain of the Company's officers and directors in the same court, captioned Steffens v. Nightingale et al. (Case No. 4:24-cv-03984-DMR). The derivative complaints are based on substantially similar allegations as those in the securities class action. The derivative complaints assert that defendants breached their fiduciary duties as directors and/or officers of the Company, as well as claims of unjust enrichment, abuse of control, gross mismanagement, waste of corporate assets, aiding and abetting, violations of Section 14(a) of the Exchange Act, and contribution under Sections 10(b) and 21D of the Exchange Act. The court consolidated

and stayed the derivative actions until after resolution of the Company’s motion(s) to dismiss in the above-referenced securities class action. On August 23, 2024, a substantially similar stockholder derivative complaint was filed against certain of the Company’s officers and directors in the United States District Court for the District of Delaware, captioned Sweitzer v. Nightingale, et al. (Case No. 1:24-cv-00969-GBW) (the “Sweitzer Action”). On September 26, 2024, the court stayed the Sweitzer Action until after resolution of the Company's motion(s) to dismiss in the above-referenced securities class action. On December 20, 2024, a substantially similar stockholder derivative complaint was filed against certain of the Company’s officers and directors in the Court of Chancery for the State of Delaware, captioned Bushansky v. Nightingale, et al. (Case No. 2024-1322) (the “Bushansky Action”). On January 8, 2025, the court stayed the Bushansky Action until after resolution of the Company’s motion(s) to dismiss in the above-referenced securities class action. It is possible that additional lawsuits will be filed, or allegations made by stockholders, regarding these same or other matters and also naming as defendants the Company and its officers and directors.

The Company is also party to various disputes that management considers routine and incidental to its business. Management does not expect the results of any of these routine actions to have a material effect on the Company's business, results of operations, financial conditions, or cash flows.

The pending lawsuits and any other related lawsuits are subject to inherent uncertainties, and the actual defense and disposition costs will depend upon many unknown factors. The outcome of the pending lawsuits and any other related lawsuits is necessarily uncertain. The Company could be forced to expend significant resources in the defense of the pending lawsuits and any additional lawsuits, and it may not prevail. In addition, the Company may incur substantial legal fees and costs in connection with such lawsuits. The Company is not currently able to estimate the possible cost to it from these matters, as the pending lawsuits are currently at an early stage, and it cannot be certain how long it may take to resolve the pending lawsuits or the possible amount of any damages that it may be required to pay. Such amounts could be material to the Company's financial statements if the Company does not prevail in the defense against the pending lawsuits and any other related lawsuits, or even if it does prevail.

As of March 31, 2026, the Company has not recorded any significant accruals for loss contingencies associated with the above mentioned lawsuits as it does not believe an outcome resulting in a loss is probable. It will accrue for loss contingencies if it becomes both probable that it will incur a loss and if the Company can reasonably estimate the amount or range of the loss.

Indemnification

The Company enters into standard indemnification agreements in the ordinary course of business. Pursuant to these agreements, the Company agrees to indemnify, hold harmless, and reimburse the indemnified party for losses suffered or incurred by the indemnified party, generally the Company’s business partners or customers, in connection with its provision of its services. Generally, these obligations are limited to claims relating to infringement of a patent, copyright, or other intellectual property right, breach of the Company’s security or data protection obligations, or its negligence, willful misconduct, or violation of law. Subject to applicable statutes of limitation, the term of these indemnification agreements is generally for the duration of the agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company carries insurance that covers certain third-party claims relating to the Company’s services and could limit its exposure in that respect.

The Company has agreed to indemnify each of its officers and directors during his or her lifetime for certain events or occurrences that happen by reason of the fact that the officer or director is, was, or has agreed to serve as an officer or director of the Company. The Company has director and officer insurance policies that may limit its exposure and may enable it to recover a portion of certain future amounts paid.

To date, the Company has not encountered material costs as a result of such indemnification obligations and has not accrued any related liabilities in its financial statements. In assessing whether to establish an accrual, the Company considers such factors as the degree of probability of an unfavorable outcome and the ability to make a reasonable estimate of the amount of loss.

Cover Page - shares shares in Millions	3 Months Ended
Cover Page - shares shares in Millions	Mar. 31, 2026	Apr. 24, 2026
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
Entity File Number	001-38897
Entity Registrant Name	FASTLY, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-5411834
Entity Address, Address Line One	475 Brannan Street, Suite 300
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94107
City Area Code	844
Local Phone Number	432-7859
Title of 12(b) Security	Class A Common Stock, $0.00002 par value
Trading Symbol	FSLY
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		156.5
Entity Central Index Key	0001517413
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Amendment Flag	false

Leases - Schedule of Future Minimum Lease Payments Under Non-Cancellable Leases (Details) $ in Thousands	Mar. 31, 2026 USD ($)
Operating Leases
Remaining 2026	$ 25,496
2027	24,135
2028	13,488
2029	7,636
2030	5,075
Thereafter	15,245
Total future minimum lease payments	91,075
Less: imputed interest	(13,429)
Total liability	$ 77,646

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2026
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s provision for income taxes for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, the Company makes a cumulative adjustment in such period. The Company continues to maintain a full valuation allowance on the Company’s U.S. Federal and state net deferred tax assets. In the three months ended March 31, 2026 and 2025, the Company recorded income tax benefit of $4.1 million and income tax expense of $0.7 million, respectively. The tax benefit for the three months ended March 31, 2026 was primarily due to the recognition of a previously unrecognized tax benefit of $4.3 million which resulted from the lapse of the applicable statute of limitations in the UK. The tax expense for the three months ended March 31, 2025 was primarily due to foreign tax expense.

- Definition

The entire disclosure for income tax.

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-Topic 740
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-Section 50
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-Subparagraph (b)
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-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

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-Topic 740
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-Subparagraph (SAB Topic 11.C)
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+ Details

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	$ 126,884	$ 126,884
Accumulated amortization	(103,390)	(101,113)
Net carrying value	23,494	25,771
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	69,100	69,100
Accumulated amortization	(47,507)	(45,347)
Net carrying value	21,593	23,753
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	49,500	49,500
Accumulated amortization	(49,500)	(49,500)
Net carrying value	0	0
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	3,300	3,300
Accumulated amortization	(3,300)	(3,300)
Net carrying value	0	0
Internet protocol addresses
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	4,984	4,984
Accumulated amortization	(3,083)	(2,966)
Net carrying value	$ 1,901	$ 2,018

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Revenue (Tables)

3 Months Ended

Mar. 31, 2026

Revenue from Contract with Customer [Abstract]

Schedule of Net Revenue by Geographic Region

The following table presents the Company’s net revenue by geographic region:


	Three months ended March 31,
	2026		2025
	(in thousands)
United States	$	122,866	$	110,531
All other countries	50,155		33,943
Total revenue	$	173,021	$	144,474

Schedule of Revenue by Product Line

The following table presents the Company’s revenue by product line:


	Three months ended March 31,
	2026		2025
	(in thousands)
Network Services	$	126,237	$	113,229
Security	38,762		26,436
Other	8,022		4,809
Total revenue	$	173,021	$	144,474

Schedule of Contract Assets and Liabilities and Revenue Recognized

The following table presents the Company’s contract assets and contract liabilities as of March 31, 2026 and as of December 31, 2025:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Contract assets	$	1,953	$	1,668
Contract liabilities	$	42,701	$	40,819

The following table presents revenue recognized during the three months ended March 31, 2026 and 2025 from amounts included in contract liability at the beginning of the period:


	Three months ended March 31,
	2026		2025
	(in thousands)
Revenue recognized in the period from amounts included in contract liability at the beginning of the period	$	14,567	$	11,594

Balance Sheet Information - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Related Disclosures [Abstract]
Deferred contract costs, net	$ 45,047	$ 47,586
Other assets	10,937	10,203
Total other assets	$ 55,984	$ 57,789

Balance Sheet Information - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Balance Sheet Related Disclosures [Abstract]
Accrued computer and networking equipment	$ 365	$ 413
Customer deposits	7,004	6,115
Other current liabilities	3,875	971
Total other current liabilities	$ 11,244	$ 7,499

Segment and Geographic Information

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

Segment and Geographic Information

Segment

The Company operates as one single operating and reportable segment. The Chief Operating Decision Maker is the Company's Chief Executive Officer, who reviews financial information presented on a consolidated basis, accompanied by disaggregated information about its revenue, for purposes of making operating decisions, assessing financial performance and allocating resources.

Net loss is the Company's primary measure of profit or loss, and all costs and expense categories on the Company's condensed consolidated statements of operations, as well as stock-based compensation, depreciation and amortization expenses, are significant. Refer to Note 10 — Stockholders' Equity for additional information about the Company's stock-based compensation expense. Refer to Note 5 — Balance Sheet Information for additional information about the Company's depreciation and amortization expenses. The Company's other segment items include interest income, interest expense, other expense, and net and income tax expense on the Company's condensed consolidated statements of operations.

Revenue

Revenue by geography is based on the billing address of the customer. Refer to Note 3 — Revenue for more information on net revenue by geographic area.

Long-Lived Assets

The Company’s property and equipment and operating lease right-of-use assets, each net, by geographic area were as follows:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
United States	$	187,453	$	168,887
All other countries	86,155		69,965
Total long-lived assets	$	273,608	$	238,852

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Net Loss Per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Net Loss Per Share of Common Stock

The following table presents the computation of basic and diluted net loss per share of common stock:


	Three months ended March 31,
	2026		2025
	(in thousands, except per share amounts)
Net loss attributable to common stockholders	$	(20,524)	$	(39,148)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	153,579		143,284
Net loss per share attributable to common stockholders, basic and diluted	$	(0.13)	$	(0.27)

Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share

The following securities were excluded from the computation of diluted net loss per share of common stock for the periods presented as their effect would have been antidilutive:


	Number of Shares
	As of March 31,
	2026	2025
	(in thousands)
Stock options	1,492	1,984
RSUs	13,549	12,135
PSUs	1,852	1,384
Market-based PSUs	278	1,313
Relative total shareholder return PSUs	499	272
Shares issuable pursuant to the ESPP	533	84
Convertible senior notes (if-converted)	19,391	9,433
Total	37,594	26,605

Balance Sheet Information

3 Months Ended

Mar. 31, 2026

Balance Sheet Related Disclosures [Abstract]

Balance Sheet Information

Property and Equipment, Net

Property and equipment, net consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Computer and networking equipment	$	313,945	$	278,181
Leasehold improvements	8,174		8,181
Furniture and fixtures	2,573		2,430
Office equipment	1,225		1,232
Internal-use software	153,460		148,419
Property and equipment, gross	$	479,377	$	438,443
Accumulated depreciation and amortization	(263,466)		(251,658)
Property and equipment, net	$	215,911	$	186,785

Depreciation on property and equipment for the three months ended March 31, 2026 and 2025 was approximately $11.9 million and $15.2 million, respectively. Included in these amounts was amortization expense for capitalized internal-use software costs of approximately $5.9 million and $5.6 million for the three months ended March 31, 2026 and 2025, respectively.

Other Assets

Other assets consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Deferred contract costs, net	$	45,047	$	47,586
Other assets	10,937		10,203
Total other assets	$	55,984	$	57,789

During the three months ended March 31, 2026 and 2025, the Company recognized $4.8 million and $4.9 million of amortization related to deferred contract costs, respectively. These costs are recorded within sales and marketing expenses on the accompanying condensed consolidated statements of operations.

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Prepaid expenses	$	17,883	$	16,737
Other current assets	11,677		10,184
Total	$	29,560	$	26,921

Accrued Expenses

Accrued expenses consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Accrued compensation and related benefits	$	19,992	$	46,611
Accrued colocation and bandwidth costs	15,997		13,944
Other tax liabilities	5,167		4,800
Other accrued expenses	4,367		5,314
Total accrued expenses	$	45,523	$	70,669

Other Current Liabilities

Other current liabilities consisted of the following:


	As of March 31, 2026		As of December 31, 2025
	(in thousands)
Accrued computer and networking equipment	365		413
Customer deposits	7,004		6,115
Other current liabilities	3,875		971
Total other current liabilities	$	11,244	$	7,499

Stockholders' Equity - Schedule of RSU and PSU Activity (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2026 $ / shares shares
RSUs
Number of Shares
Beginning balance (in shares) \| shares	14,001
Granted (in shares) \| shares	4,192
Vested (in shares) \| shares	(4,160)
Cancelled/forfeited (in shares) \| shares	(484)
Ending balance (in shares) \| shares	13,549
Weighted-Average Grant Date Fair Value Per Share
Beginning balance (in dollars per share) \| $ / shares	$ 8.25
Granted (in dollars per share) \| $ / shares	17.75
Vested (in dollars per share) \| $ / shares	14.09
Cancelled/forfeited (in dollars per share) \| $ / shares	8.34
Ending balance (in dollars per share) \| $ / shares	$ 9.39
PSUs
Number of Shares
Beginning balance (in shares) \| shares	1,445
Granted (in shares) \| shares	1,039
Vested (in shares) \| shares	(448)
Cancelled/forfeited (in shares) \| shares	(184)
Ending balance (in shares) \| shares	1,852
Weighted-Average Grant Date Fair Value Per Share
Beginning balance (in dollars per share) \| $ / shares	$ 7.08
Granted (in dollars per share) \| $ / shares	20.04
Vested (in dollars per share) \| $ / shares	7.13
Cancelled/forfeited (in dollars per share) \| $ / shares	6.98
Ending balance (in dollars per share) \| $ / shares	$ 14.35

Debt Instruments - Senior Secured Credit Facilities Credit Agreement (Narrative) (Details) - Senior Secured Credit Facilities Agreement		3 Months Ended
	Feb. 16, 2021 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Debt Instrument [Line Items]
Maximum borrowing amount	$ 60,000,000.0
Net liquidity covenant threshold	120,000,000.0
Debt issuance costs	$ 600,000
Debt covenant, adjusted quick ratio, minimum requirement	1.25
Debt covenant, springing revenue quarterly growth basis	5.00%
Debt covenant, adjusted quick ratio, minimum threshold to trigger revenue growth covenant requirement	1.75
Amounts drawn on line of credit		$ 0	$ 0
Amount of debt outstanding		$ 0		$ 0
Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	1.00%
Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	2.00%
Minimum
Debt Instrument [Line Items]
Net liquidity covenant threshold	$ 200,000,000.0
Commitment fee, unused portion (as percent)	0.20%
Maximum
Debt Instrument [Line Items]
Convertible debt outstanding threshold	$ 35,000,000.0
Commitment fee, unused portion (as percent)	0.25%

Stockholders' Equity - Company-wide Bonus Program (“Bonus Program”) (Narrative) (Details) - USD ($) $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended
	Feb. 28, 2026	Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under bonus program		$ 39,455	$ 6,898
Stock-based compensation expense		34,981	25,582
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		2,000	800
Bonus Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under bonus program (in shares)	2.2
Shares issued under bonus program	$ 39,500
Bonus Program \| PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 8,500	$ 3,700
Bonus Program \| Performance Target Payout Level One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout of performance-based restricted stock units, percentage	50.00%
Bonus Program \| Performance Target Payout Level Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout of performance-based restricted stock units, percentage	100.00%
Bonus Program \| Performance Target Payout Level Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout of performance-based restricted stock units, percentage	150.00%

Debt Instruments - Schedule of Convertible Senior Notes (Details) - Convertible Debt - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Principal amount	$ 330,000
2028 Notes
Debt Instrument [Line Items]
Principal amount	$ 150,000		$ 150,000
Coupon Interest Rate	7.75%		7.75%
Effective Interest Rate	7.77%
2030 Notes
Debt Instrument [Line Items]
Principal amount	$ 180,000	$ 180,000
Coupon Interest Rate	0.00%	0.00%
Effective Interest Rate	0.76%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Debt Instruments - Redemption Rights of the Notes (Narrative) (Details) - 2030 Notes - Convertible Debt	3 Months Ended
	Mar. 31, 2026 day
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger	130.00%
Debt instrument, convertible, threshold trading days	20
Debt instrument, convertible, threshold consecutive trading days	30
Debt instrument, convertible, period of noticed required (in days)	35 days
Debt instrument, redemption price, percentage	100.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 146,670	$ 180,563
Marketable securities	183,819	181,196
Accounts receivable, net of allowance for credit losses of $6,156 and $6,262 as of March 31, 2026 and December 31, 2025, respectively	130,037	118,029
Prepaid expenses and other current assets	29,560	26,921
Total current assets	490,086	506,709
Property and equipment, net	215,911	186,785
Operating lease right-of-use assets, net	57,697	52,067
Goodwill	670,356	670,356
Intangible assets, net	23,494	25,771
Other assets	55,984	57,789
Total assets	1,513,528	1,499,477
Current liabilities:
Accounts payable	39,006	17,612
Accrued expenses	45,523	70,669
Long-term debt, current	0	38,557
Operating lease liabilities, current	28,107	24,427
Deferred revenue	39,560	35,234
Other current liabilities	11,244	7,499
Total current liabilities	163,440	193,998
Long-term debt, net	323,620	323,282
Operating lease liabilities, non-current	46,019	43,921
Other long-term liabilities	3,303	8,698
Total liabilities	536,382	569,899
Commitments and contingencies (Note 9)
Stockholders’ equity:
Additional paid-in capital	2,112,577	2,044,103
Accumulated other comprehensive loss	(423)	(41)
Accumulated deficit	(1,135,011)	(1,114,487)
Total stockholders’ equity	977,146	929,578
Total liabilities and stockholders’ equity	1,513,528	1,499,477
Common Class A
Stockholders’ equity:
Common stock	3	3
Common Class B
Stockholders’ equity:
Common stock	$ 0	$ 0

Debt Instruments - Schedule of Carrying Value of Notes (Details) - Convertible Debt - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
2030 Notes
Debt Instrument [Line Items]
Principal amount	$ 180,000	$ 180,000
Less: unamortized debt issuance costs	(6,292)	(6,620)
Net carrying amount	173,708	173,380
2028 Notes
Debt Instrument [Line Items]
Principal amount	150,000	150,000
Less: unamortized debt issuance costs	(88)	(98)
Net carrying amount	149,912	149,902
2026 Notes
Debt Instrument [Line Items]
Principal amount	0	38,594
Less: unamortized debt issuance costs	0	(37)
Net carrying amount	$ 0	$ 38,557

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482949/835-30-55-8

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
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-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
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-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
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-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-4

+ Details

Stockholders' Equity - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 34,981	$ 25,582
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	2,536	1,939
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	10,030	8,893
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	9,353	6,693
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 13,062	$ 8,057

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Revenue	$ 173,021	$ 144,474
Cost of revenue	64,840	67,676
Gross profit	108,181	76,798
Operating expenses:
Research and development	41,972	37,429
Sales and marketing	55,114	49,313
General and administrative	34,990	28,235
Total operating expenses	132,076	114,977
Loss from operations	(23,895)	(38,179)
Interest income	2,927	2,975
Interest expense	(3,306)	(3,173)
Other expense, net	(380)	(80)
Loss before income taxes	(24,654)	(38,457)
Income tax (benefit) expense	(4,130)	691
Net loss	$ (20,524)	$ (39,148)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.13)	$ (0.27)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.13)	$ (0.27)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	153,579	143,284
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	153,579	143,284

Debt Instruments

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Debt Instruments

Senior Secured Credit Facilities Credit Agreement

On February 16, 2021, the Company entered into a Senior Secured Credit Facilities Credit Agreement (as amended, restated, amended and restated, supplemented, restructured, or otherwise modified from time to time, the “Credit Agreement”) with the lenders from time to time party thereto (the “Lenders”) and Silicon Valley Bank, a division of First-Citizens Bank & Trust Company, as a lender and as administrative agent and collateral agent for the Lenders. The Credit Agreement provides for a $60.0 million senior secured revolving facility, with a maturity date of the earlier of (i) April 30, 2027 and (ii) so long as any of our permitted convertible debt is outstanding after January 30, 2027 and if Net Liquidity is less than $200.0 million (or, if the amount of outstanding permitted convertible debt is less than $35.0 million, $120.0 million), such date. The Company recorded $0.6 million of debt issuance costs associated with the Credit Agreement in other assets on the Company’s condensed consolidated balance sheets.

The revolving loans bear interest, at the Company’s election, at an annual rate based on the ABR (as defined in the Credit Agreement) plus 1.00% (such loans, the “ABR Loans”) or the Adjusted Term SOFR (as defined in the Credit Agreement) plus 2.00% (such loans, the “SOFR Loans”).

Interest payments on outstanding borrowings are due, with respect to SOFR Loans, on the last day of each interest period and with respect to ABR Loans, on the last calendar day of each month. The Credit Agreement has a commitment fee on the unused portion of the borrowing commitment, which is payable on the last day of each calendar quarter at a rate per annum of 0.20% to 0.25% depending on the average daily outstanding balance of all loans and letters of credit under the Credit Agreement. In addition, the Credit Agreement contains a financial covenant that requires the Company to maintain a consolidated adjusted quick ratio of at least 1.25 to 1:00 tested on a quarterly basis as well as a springing revenue growth covenant not to be less than 5% on a quarterly basis for certain periods if the Company’s consolidated adjusted quick ratio falls below 1.75 to 1:00 on the last day of any fiscal quarter. The Credit Agreement requires the Company to comply with various affirmative and negative covenants, and contains customary events of default.

As of March 31, 2026, the Company was in compliance with all of the Credit Agreement’s covenants. During the three months ended March 31, 2026 and 2025, no amounts were drawn down on the Credit Agreement. As of March 31, 2026 and December 31, 2025, no amounts were outstanding under the Credit Agreement.

Convertible Senior Notes

On March 5, 2021, the Company issued approximately $948.8 million aggregate principal amount of 0% convertible unsecured senior notes due 2026 (the “2026 Notes”), including the exercise in full by the initial purchasers of their option to purchase up to an additional approximately $123.8 million principal amount of the 2026 Notes. The 2026 Notes were issued in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act. The net proceeds from the issuance of the 2026 Notes were approximately $930.0 million after deducting the initial purchasers’ discounts and transaction costs.

On May 25, 2022, the Company entered into separate, privately negotiated transactions with certain holders of the 2026 Notes to repurchase (the “Repurchases”) $235.0 million aggregate principal amount of the 2026 Notes for an aggregate cash repurchase price of $176.4 million and aggregate transaction costs of $0.7 million.

During the year ended December 31, 2023, the Company entered into several separate privately negotiated transactions with certain holders of the 2026 Notes to repurchase $367.3 million aggregate principal amount of the 2026 Notes for an aggregate cash repurchase price of $309.1 million and aggregate transaction costs of $2.0 million.

During the year ended December 31, 2024, the Company entered into separate, privately negotiated transactions with certain holders of the 2026 Notes to exchange $157.9 million aggregate principal amount of the 2026 Notes for $150.0 million aggregate principal amount of 7.75% convertible unsecured senior notes due 2028 (the “2028 Notes”), which were issued in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act.

During the year ended December 31, 2025, the Company issued $180.0 million aggregate principal amount of 0% convertible senior unsecured notes due in 2030 (the “2030 Notes”) in a private offering to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act. Concurrently with issuance of the 2030 Notes, the Company also entered into separate, privately negotiated transactions with certain holders of the 2026 Notes to repurchase $150.0 million aggregate principal amount of the 2026 Notes for an aggregate cash repurchase price of $148.9 million. The

repurchase was accounted for as a debt extinguishment and resulted in a net gain of $0.9 million, which was recorded as non-operating income on the Company’s condensed consolidated statement of operations for the year ended December 31, 2025.

During the quarter ended March 31, 2026, the 2026 Notes matured and were repaid in full.

As of March 31, 2026, the Company's outstanding convertible senior notes (collectively, the "Notes") had a par value totaling $330.0 million. The following table summarizes further details of the Notes:


Notes	Issuance Date	Maturity Date	Principal amount (in thousands)		Coupon Interest Rate		Effective Interest Rate
2028 Notes	June 1, 2025	June 1, 2028	$	150,000	7.75	%	7.77	%
2030 Notes	December 9, 2025	December 15, 2030	$	180,000	0	%	0.76	%

Redemption Rights of the Notes

The Company may not redeem the 2028 Notes prior to the maturity date.

The 2030 Notes may not be redeemed by the Company prior to December 20, 2028. On or after December 20, 2028, if the common stock price is at least 130% of the conversion price for the 2030 Notes in effect for at least 20 of any 30 consecutive trading day period, the Company may redeem all or part of the 2030 Notes at a redemption price equal to the principal amount and accrued and unpaid interest with at least 35 days’ notice to holders.

If the Company undergoes a fundamental change at any time prior to the maturity date of the 2030 Notes, holders of the 2030 Notes will have the right, at their option, to require the Company to repurchase for cash all or any portion of their 2030 Notes at a repurchase price equal to 100% of the principal amount of the 2030 Notes to be repurchased, plus accrued and unpaid interest up to, but excluding, the fundamental change repurchase date.

Conversion Rights of the Notes

Prior to the close of business on the business day immediately preceding the conversion date, as noted in the table below, under the following circumstances a holder may exercise their conversion right:

(1) During any calendar quarter commencing after the calendar quarter ended March 31, 2025 for the 2028 Notes and March 31, 2026 for the 2030 Notes (and only during such calendar quarter), if the last reported sale price of the Company's common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;

(2) During the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the respective Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company's common stock and the conversion rate on each such trading day; or

(3) Upon the occurrence of specified corporate events.

On or after the respective conversion date, as noted in the table below, holders may convert all or any portion of their respective Notes at any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date.

Upon conversion, the Company may satisfy its conversion obligation by paying or delivering, as the case may be, cash, shares of its common stock or a combination of cash and shares of its common stock, at the Company’s election.

The conversion rights of the Notes are as follows:


Notes	Conversion Date	Conversion Rate(1)	Conversion Price per share
2028 Notes	March 1, 2028	50.6586	$	19.74
2030 Notes	September 16, 2030	65.5136	$	15.26

(1) The conversion rate for the Notes is established as a number of shares of the Company's common stock per $1,000 principal amount of the Notes, that is equivalent to the conversion price per share, subject to adjustments in certain events. Upon the occurrence of certain corporate events the Company will increase the conversion rate for a holder that elects to convert its Notes.

The circumstances described in paragraph (1) above were met for the 2030 Notes during the first quarter of 2026 and as a result, the 2030 Notes are convertible at the option of the holder from April 1, 2026 until June 30, 2026.

Carrying Value of the Notes as follows:


	2030 Notes		2028 Notes		2026 Notes
As of March 31, 2026
Principal amount	$	180,000	$	150,000	$	—
Less: unamortized debt issuance costs	(6,292)		(88)		—
Net carrying amount	173,708		149,912		—

As of December 31, 2025
Principal amount	180,000		150,000		38,594
Less: unamortized debt issuance costs	(6,620)		(98)		(37)
Net carrying amount	173,380		149,902		38,557

For the three months ended March 31, 2026 and 2025, interest expense related to the Company’s debt obligations was $3.3 million and $3.1 million, respectively. As of March 31, 2026 and December 31, 2025, the total estimated fair value of the Notes was $653.3 million and $379.5 million, respectively.

Capped Calls

In connection with the pricing of the issuance of the 2030 Notes, the Company entered into privately negotiated capped call transactions with certain counterparties (the "Capped Calls") in the year ended December 31, 2025. The Capped Calls associated with the 2030 Notes each had an initial strike price of approximately $15.26 per share. These Capped Calls had initial cap prices of $23.04 per share, subject to certain adjustments. The Capped Calls are expected to partially offset the potential dilution to the Company’s common stock upon any conversion of the 2030 Notes, with such offset subject to a cap based on the cap price. The Capped Calls are subject to adjustment upon the occurrence of specified extraordinary events affecting the Company, including merger events, tender offers and the announcement of such events. In addition, the Capped Calls are subject to certain specified additional disruption events that may give rise to a termination of the Capped Calls, including nationalization, insolvency or delisting, changes in law, failures to deliver, increased cost of hedging and hedging disruptions. For accounting purposes, the Capped Calls are separate transactions and not part of the terms of the 2030 Notes. As these transactions meet certain accounting criteria, the Capped Calls are recorded in stockholders' equity resulting in an $18.2 million decrease in additional paid in capital as of December 31, 2025.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
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+ Details

Segment and Geographic Information - Narrative (Details)	3 Months Ended
	Mar. 31, 2026 segment
Segment Reporting [Abstract]
Number of operating segments	1
Number of reportable segments	1

Leases

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Leases

The Company has operating leases for corporate offices and data centers (“colocation” leases) The Company’s operating leases have remaining lease terms ranging from less than 1 year to 8 years, some of which include options to extend the leases. The Company also subleases a portion of its corporate office space. The Company’s sublease has a remaining lease term of 4 years.

The components of lease cost were as follows:


	Three months ended March 31,
	2026		2025
	(in thousands)
Operating lease costs:
Operating lease cost	$	7,394	$	6,582
Variable lease cost	5,375		4,973
Total operating lease costs	$	12,769	$	11,555

The short-term lease costs were not material for either of the three months ended March 31, 2026 and 2025. The Company did not recognize any material impairment charges on its operating lease right-of-use assets for either of the three months ended March 31, 2026 or 2025.


	As of March 31, 2026		As of December 31, 2025
Weighted Average Remaining Lease Term (in years):
Operating leases	4.19		4.39

Weighted Average Discount Rate:
Operating leases	7.12	%	7.16	%

Future minimum lease payments under non-cancellable leases as of March 31, 2026 were as follows:


	Operating Leases
	(in thousands)
Remaining 2026	$	25,496
2027	24,135
2028	13,488
2029	7,636
2030	5,075
Thereafter	15,245
Total future minimum lease payments	$	91,075
Less: imputed interest	(13,429)
Total liability	$	77,646

As of March 31, 2026, the Company has undiscounted commitments of $3.5 million for operating leases that have not yet commenced, and therefore are not included in the right-of-use asset or operating lease liability. These operating leases will commence in subsequent quarters of 2026 with lease terms of up to 3 years.

Leases

The components of lease cost were as follows:


	Three months ended March 31,
	2026		2025
	(in thousands)
Operating lease costs:
Operating lease cost	$	7,394	$	6,582
Variable lease cost	5,375		4,973
Total operating lease costs	$	12,769	$	11,555


	As of March 31, 2026		As of December 31, 2025
Weighted Average Remaining Lease Term (in years):
Operating leases	4.19		4.39

Weighted Average Discount Rate:
Operating leases	7.12	%	7.16	%

Future minimum lease payments under non-cancellable leases as of March 31, 2026 were as follows:


	Operating Leases
	(in thousands)
Remaining 2026	$	25,496
2027	24,135
2028	13,488
2029	7,636
2030	5,075
Thereafter	15,245
Total future minimum lease payments	$	91,075
Less: imputed interest	(13,429)
Total liability	$	77,646

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2026
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation and Consolidation The accompanying condensed consolidated financial statements and footnotes have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”), consistent in all material respects with those applied in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Securities and Exchange Commission (“SEC”) on February 25, 2026.
Consolidation	The Company’s condensed consolidated financial statements include its accounts and its wholly owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Company’s condensed consolidated financial statements are unaudited but include all adjustments of a normal recurring nature necessary for a fair presentation of its quarterly results. The Company’s condensed consolidated financial statements should be read in conjunction with the audited condensed consolidated financial statements and related notes in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets, liabilities, revenue, costs and expenses, and related disclosures. Actual results and outcomes could differ significantly from the Company’s estimates, judgments, and assumptions. Significant estimates, judgments, and assumptions used in these financial statements include, but are not limited to, those related to revenue, accounts receivable and related reserves, internal-use software development costs, the incremental borrowing rate related to the Company’s lease liabilities, fair value of assets acquired and liabilities assumed during business combinations, useful lives of property and equipment and acquired intangible assets, financial instruments, income tax reserves, and accounting for stock-based compensation. Estimates are periodically reviewed in light of changes in circumstances, facts, and experience. The effects of material revisions in estimates are reflected in the condensed consolidated financial statements in the period of change and prospectively from the date of the change in estimate.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In November 2024, the Financial Accounting Standards Board ("FASB") issued ASU 2024-03 “Disaggregation of Income Statement Expenses,” which aims to improve the disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. The guidance is effective for the Company's annual periods beginning in 2027 and interim periods beginning in the first quarter of fiscal year 2028. The Company is currently evaluating the impact of the new guidance. In November 2024, the FASB issued ASU 2024-04 “Induced Conversions of Convertible Debt Instruments,” which amends ASC 470-202 to clarify the requirements related to accounting for the settlement of a debt instrument as an induced conversion. The guidance is effective for the Company's annual periods beginning in 2026 and interim periods within those annual reporting periods. The Company adopted the standard effective January 1, 2026 on a prospective basis. Adoption of the guidance did not have a material impact on the Company’s condensed consolidated financial statements. In September 2025, the FASB issued ASU 2025-06 “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software,” which aims to clarify and modernize the accounting for costs related to internal-use software. The guidance is effective for the Company's interim and annual periods beginning in 2028. The Company is currently evaluating the impact of the new guidance.
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash, cash equivalents, marketable securities and accounts receivable. The Company’s cash, cash equivalents, and marketable securities primarily consisted of money market funds, investment-grade commercial paper, corporate notes and bonds, U.S. treasury securities, municipal bonds, agency bonds, and certificates of deposit. The primary focus of its investment strategy is to preserve capital and meet liquidity requirements. The Company’s investment policy limits the amount of credit exposure with any one financial institution or commercial issuer. The Company maintains deposits in federally insured financial institutions in excess of federally insured limits. The Company is exposed to credit risk in the event of default by the financial institutions holding its cash and cash equivalents to the extent recorded in the balance sheets. Concentrations of credit risk with respect to accounts receivable are primarily limited to certain customers to which the Company makes substantial sales. The Company’s customer base consists of a large number of geographically dispersed customers diversified across several industries.
Revenue	Revenue by geography is based on the billing address of the customer.
Fair Value of Financial Instruments	Fair Value of Financial Instruments For certain of the Company’s financial instruments, including cash held in banks, accounts receivable, and accounts payable, the carrying amounts approximate fair value due to their short maturities, and are therefore excluded from the fair value tables below. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There is a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: Level 1—Observable inputs such as quoted prices in active markets for identical assets or liabilities; Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3—Unobservable inputs that are supported by little or no market activity, which require management judgment or estimation. The Company measures its cash equivalents and marketable securities at fair value. The Company classifies its cash equivalents and marketable securities within Level 1 or Level 2 because the Company values these investments using quoted market prices or alternative pricing sources and models utilizing market observable inputs. The Company classifies its investments, which are comprised of corporate notes and bonds, commercial paper, U.S. treasury securities, certificates of deposit, and municipal securities within Level 2 of the fair value hierarchy because the fair value of these securities is priced by using inputs based on non-binding market consensus prices that are primarily corroborated by observable market data or quoted market prices for similar instruments. Financial assets and liabilities are measured and recorded at fair value on a recurring basis.

- Definition

Disclosure of accounting policy for revenue from contract with customer.

+ References

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-Topic 606
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-Section 50
-Paragraph 17
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-URI https://asc.fasb.org/1943274/2147479806/606-10-50-17

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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/606/tableOfContent

+ Details

- Definition

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Commitments and Contingencies - Schedule of Purchase Commitments (Details) $ in Thousands	Mar. 31, 2026 USD ($)
Long-term Purchase Commitment [Line Items]
Remainder of 2026	$ 42,481
2027	32,454
2028	13,600
2029	107
2030	96
Thereafter	0
Total	88,738
Cost of Revenue Commitments
Long-term Purchase Commitment [Line Items]
Remainder of 2026	25,036
2027	18,024
2028	4,491
2029	20
2030	0
Thereafter	0
Total	47,571
Operating Expense Commitments
Long-term Purchase Commitment [Line Items]
Remainder of 2026	17,445
2027	14,430
2028	9,109
2029	87
2030	96
Thereafter	0
Total	$ 41,167

Revenue - Remaining Performance Obligation (Narrative) (Details) $ in Millions	Mar. 31, 2026 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue performance obligation	$ 368.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	75.00%
Remaining performance obligation, timing of satisfaction (in months)	12 months

Revenue - Schedule of Net Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 173,021	$ 144,474
United States
Disaggregation of Revenue [Line Items]
Total revenue	122,866	110,531
All other countries
Disaggregation of Revenue [Line Items]
Total revenue	$ 50,155	$ 33,943

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Segment and Geographic Information - Schedule of Property and Equipment and Operating Lease Right-of-Use Assets, Net by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 273,608	$ 238,852
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	187,453	168,887
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 86,155	$ 69,965

Debt Instruments - Capped Calls (Narrative) (Details) - 2030 Notes $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) $ / shares
Debt Instrument [Line Items]
Initial strike price (in dollars per share)	$ 15.26
Initial cap price (in dollars per share)	$ 23.04
Decrease from purchase of capped calls \| $	$ 18.2

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Investments and Fair Value Measurements

3 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

Investments and Fair Value Measurements

Fair Value of Financial Instruments

For certain of the Company’s financial instruments, including cash held in banks, accounts receivable, and accounts payable, the carrying amounts approximate fair value due to their short maturities, and are therefore excluded from the fair value tables below.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There is a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1—Observable inputs such as quoted prices in active markets for identical assets or liabilities;

Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

Level 3—Unobservable inputs that are supported by little or no market activity, which require management judgment or estimation.

The Company measures its cash equivalents and marketable securities at fair value. The Company classifies its cash equivalents and marketable securities within Level 1 or Level 2 because the Company values these investments using quoted market prices or alternative pricing sources and models utilizing market observable inputs.

The Company classifies its investments, which are comprised of corporate notes and bonds, commercial paper, U.S. treasury securities, certificates of deposit, and municipal securities within Level 2 of the fair value hierarchy because the fair value of these securities is priced by using inputs based on non-binding market consensus prices that are primarily corroborated by observable market data or quoted market prices for similar instruments. Financial assets and liabilities are measured and recorded at fair value on a recurring basis.


	As of March 31, 2026
									Reported as:
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value		Cash and cash equivalents		Marketable securities:
	(in thousands)
Cash	$	54,382	$	—	$	—	$	54,382	$	54,382	$	—
Level 1:
Money market funds	63,397		—		—		63,397		63,397		—
Level 2:
U.S. Treasury securities	29,900		4		(13)		29,891		1,999		27,892
Corporate notes and bonds	87,261		—		(197)		87,064		2,157		84,907
Commercial paper	92,962		—		(107)		92,855		24,235		68,620
Agency Bonds	200		—		—		200		—		200
Municipal Securities	600		—		—		600		500		100
Certificates of deposit	2,100		—		(1)		2,099		—		2,100
Total	$	330,802	$	4	$	(318)	$	330,488	$	146,670	$	183,819


	As of December 31, 2025
									Reported as:
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value		Cash and cash equivalents		Marketable securities:
	(in thousands)
Cash	$	87,743	$	—	$	—	$	87,743	$	87,743	$	—
Level 1:
Money market funds	44,032		—		—		44,032		44,032		—
Level 2:
U.S. Treasury securities	64,273		27		—		64,300		8,290		56,010
Corporate notes and bonds	50,942		19		—		50,961		4,570		46,391
Commercial paper	111,706		20		(2)		111,724		33,928		77,796
Municipal Securities	1,600		—		—		1,600		1,600		—
Certificates of deposit	1,399		—		—		1,399		400		999
Total	$	361,695	$	66	$	(2)	$	361,759	$	180,563	$	181,196

The contractual maturities of the Company's marketable securities are all due in one year or less as of March 31, 2026. There were no transfers of assets and liabilities measured at fair value between Level 1 and Level 2, or between Level 2 and Level 3, during the three months ended March 31, 2026 and 2025. For the three months ended March 31, 2026 and 2025, the Company did not record any impairment charges for its marketable debt securities in its condensed consolidated statements of operations. No impairment loss has been recorded on the securities as the Company does not intend to sell any impaired securities, nor is it more likely than not that the Company would be required to sell impaired securities before recovery of amortized cost basis.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
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-Subparagraph (h)
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-Topic 820
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
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-Subparagraph (e)
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Section 50
-Paragraph 6A
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
-SubTopic 820
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net loss	$ (20,524)	$ (39,148)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation expense	11,892	15,167
Amortization of intangible assets	2,277	4,900
Non-cash lease expense	6,198	5,655
Amortization of debt discount and issuance costs	401	217
Amortization of deferred contract costs	4,758	4,850
Stock-based compensation	34,981	25,582
Deferred income taxes	(4,330)	422
Provision for credit losses	1,518	946
Loss on disposals of property and equipment	276	0
Accretion of discounts on investments	(798)	(626)
Other adjustments	(218)	376
Changes in operating assets and liabilities:
Accounts receivable, net	(13,526)	(3,993)
Prepaid expenses and other current assets	(2,639)	2,216
Other assets	1,350	(2,095)
Accounts payable	6,812	2,575
Accrued expenses	3,523	(3,383)
Operating lease liabilities	(5,809)	(5,556)
Other liabilities	2,724	9,183
Net cash provided by operating activities	28,866	17,288
Cash flows from investing activities:
Purchases of marketable securities	(179,340)	(179,486)
Maturities of marketable securities	177,143	7,969
Purchases of property and equipment	(21,021)	(2,605)
Capitalized internal-use software	(3,736)	(4,763)
Net cash used in investing activities	(26,954)	(178,885)
Cash flows from financing activities:
Repayment of convertible senior notes	(38,593)	0
Payments of other debt issuance costs	(502)	0
Repayments of finance lease liabilities	0	(1,711)
Proceeds from exercise of vested stock options	1,043	408
Proceeds from employee stock purchase plan	2,279	2,131
Net cash (used in) provided by financing activities	(35,773)	828
Effects of exchange rate changes on cash and cash equivalents	(32)	78
Net decrease in cash and cash equivalents	(33,893)	(160,691)
Cash and cash equivalents at beginning of period	180,563	286,175
Cash and cash equivalents at end of period	146,670	125,484
Supplemental disclosure of cash flow information:
Cash paid for interest	38	50
Cash paid for income taxes, net of refunds received	364	449
Cash paid for finance lease interest	0	12
Noncash investing and financing activities:
Property and equipment additions not yet paid in cash or financed	22,737	2,441
Capitalized stock-based compensation	1,502	1,612
Assets obtained in exchange for operating lease obligations	8,736	2,946
Net non-cash change in operating lease assets and liabilities associated with modifications and terminations	3,094	1,076
Deployments of prepaid capital equipment	$ 0	$ 3,532

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2024		142,086
Beginning balance at Dec. 31, 2024	$ 965,250	$ 3	$ 1,958,157	$ (100)	$ (992,810)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of vested stock options (in shares)		168
Exercise of vested stock options	408		408
Vesting of restricted stock units (in shares)		1,481
Shares issued under bonus program (in shares)		951
Shares issued under bonus program	6,898		6,898
Stock-based compensation	23,645		23,645
Net loss	(39,148)				(39,148)
Other comprehensive income	(30)			(30)
Ending balance (in shares) at Mar. 31, 2025		144,686
Ending balance at Mar. 31, 2025	$ 957,023	$ 3	1,989,108	(130)	(1,031,958)
Beginning balance (in shares) at Dec. 31, 2025	151,500	151,537
Beginning balance at Dec. 31, 2025	$ 929,578	$ 3	2,044,103	(41)	(1,114,487)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of vested stock options (in shares)		224
Exercise of vested stock options	1,043		1,043
Vesting of restricted stock units (in shares)		4,607
Shares issued under bonus program	39,455		39,455
Stock-based compensation	27,976		27,976
Net loss	(20,524)				(20,524)
Other comprehensive income	$ (382)			(382)
Ending balance (in shares) at Mar. 31, 2026	156,400	156,368
Ending balance at Mar. 31, 2026	$ 977,146	$ 3	$ 2,112,577	$ (423)	$ (1,135,011)

Net Loss Per Share Attributable to Common Stockholders - Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	37,594	26,605
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	1,492	1,984
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	13,549	12,135
PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	1,852	1,384
Market-based PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	278	1,313
Relative total shareholder return PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	499	272
Shares issuable pursuant to the ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	533	84
Convertible senior notes (if-converted)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	19,391	9,433

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Accounts receivable, net of allowance for credit losses	$ 6,156	$ 6,262
Common stock, shares issued (in shares)	156,400,000	151,500,000
Common stock, shares outstanding (in shares)	156,400,000	151,500,000
Common Class A
Common stock, par value (in USD per share)	$ 0.00002	$ 0.00002
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	156,367,942	151,537,271
Common stock, shares outstanding (in shares)	156,367,942	151,537,271
Common Class B
Common stock, par value (in USD per share)	$ 0.00002	$ 0.00002
Common stock, shares authorized (in shares)	4,191,275	4,191,275
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0

Debt Instruments (Tables)

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Schedule of Long-Term Debt Instruments

The following table summarizes further details of the Notes:


Notes	Issuance Date	Maturity Date	Principal amount (in thousands)		Coupon Interest Rate		Effective Interest Rate
2028 Notes	June 1, 2025	June 1, 2028	$	150,000	7.75	%	7.77	%
2030 Notes	December 9, 2025	December 15, 2030	$	180,000	0	%	0.76	%

The conversion rights of the Notes are as follows:


Notes	Conversion Date	Conversion Rate(1)	Conversion Price per share
2028 Notes	March 1, 2028	50.6586	$	19.74
2030 Notes	September 16, 2030	65.5136	$	15.26

Schedule of Carrying Values of Debt Agreements

Carrying Value of the Notes as follows:


	2030 Notes		2028 Notes		2026 Notes
As of March 31, 2026
Principal amount	$	180,000	$	150,000	$	—
Less: unamortized debt issuance costs	(6,292)		(88)		—
Net carrying amount	173,708		149,912		—

As of December 31, 2025
Principal amount	180,000		150,000		38,594
Less: unamortized debt issuance costs	(6,620)		(98)		(37)
Net carrying amount	173,380		149,902		38,557

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

Leases (Tables)

3 Months Ended

Mar. 31, 2026

Leases [Abstract]

Schedule of Components of Lease Cost and Other Information

The components of lease cost were as follows:


	Three months ended March 31,
	2026		2025
	(in thousands)
Operating lease costs:
Operating lease cost	$	7,394	$	6,582
Variable lease cost	5,375		4,973
Total operating lease costs	$	12,769	$	11,555


	As of March 31, 2026		As of December 31, 2025
Weighted Average Remaining Lease Term (in years):
Operating leases	4.19		4.39

Weighted Average Discount Rate:
Operating leases	7.12	%	7.16	%

Schedule of Operating Lease Maturity

Future minimum lease payments under non-cancellable leases as of March 31, 2026 were as follows:


	Operating Leases
	(in thousands)
Remaining 2026	$	25,496
2027	24,135
2028	13,488
2029	7,636
2030	5,075
Thereafter	15,245
Total future minimum lease payments	$	91,075
Less: imputed interest	(13,429)
Total liability	$	77,646

Schedule of Finance Lease Maturity

Future minimum lease payments under non-cancellable leases as of March 31, 2026 were as follows:


	Operating Leases
	(in thousands)
Remaining 2026	$	25,496
2027	24,135
2028	13,488
2029	7,636
2030	5,075
Thereafter	15,245
Total future minimum lease payments	$	91,075
Less: imputed interest	(13,429)
Total liability	$	77,646

Net Loss Per Share Attributable to Common Stockholders

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Net Loss Per Share Attributable to Common Stockholders

Basic net loss per share is computed by dividing net loss by basic weighted-average shares outstanding during the period. Diluted net loss per share is computed by dividing net loss by diluted weighted-average shares outstanding, including potentially dilutive securities.

The following table presents the computation of basic and diluted net loss per share of common stock:


	Three months ended March 31,
	2026		2025
	(in thousands, except per share amounts)
Net loss attributable to common stockholders	$	(20,524)	$	(39,148)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	153,579		143,284
Net loss per share attributable to common stockholders, basic and diluted	$	(0.13)	$	(0.27)

The following securities were excluded from the computation of diluted net loss per share of common stock for the periods presented as their effect would have been antidilutive:


	Number of Shares
	As of March 31,
	2026	2025
	(in thousands)
Stock options	1,492	1,984
RSUs	13,549	12,135
PSUs	1,852	1,384
Market-based PSUs	278	1,313
Relative total shareholder return PSUs	499	272
Shares issuable pursuant to the ESPP	533	84
Convertible senior notes (if-converted)	19,391	9,433
Total	37,594	26,605

The dilution table above excludes RSUs to be awarded under the Company’s 2026 Bonus Program, which is expected to have an impact on its outstanding awards in the first quarter of 2026. Refer to Note 10 — Stockholders' Equity for further details on the Company’s 2026 Bonus Program.

Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

As of March 31, 2026 and December 31, 2025, the Company’s intangible assets consisted of the following:


	As of March 31, 2026						As of December 31, 2025
	Gross carrying value		Accumulated amortization		Net carrying value		Gross carrying value		Accumulated amortization		Net carrying value
	(in thousands)
Intangible assets:
Customer relationships	$	69,100	$	(47,507)	$	21,593	$	69,100	$	(45,347)	$	23,753
Developed technology	49,500		(49,500)		—		49,500		(49,500)		—
Trade names	3,300		(3,300)		—		3,300		(3,300)		—
Internet protocol addresses	4,984		(3,083)		1,901		4,984		(2,966)		2,018
Total intangible assets	$	126,884	$	(103,390)	$	23,494	$	126,884	$	(101,113)	$	25,771

Schedule of Expected Amortization Expense of Intangible Assets

The expected amortization expense of intangible assets subject to amortization as of March 31, 2026 is as follows:


	As of March 31, 2026
	(in thousands)
Remainder of 2026	$	6,788
2027	9,051
2028	6,891
2029	378
2030	281
Thereafter	105
Total	$	23,494

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Other Comprehensive Income [Abstract]
Net loss	$ (20,524)	$ (39,148)
Other comprehensive loss:
Unrealized loss on investments in available-for-sale-securities	(382)	(30)
Total other comprehensive loss	(382)	(30)
Comprehensive loss	$ (20,906)	$ (39,178)

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Jan. 01, 2026	Dec. 31, 2025
Concentration Risk [Line Items]
Decrease in net loss	$ (20,524)	$ (39,148)
Decrease in depreciation expense	(11,900)	$ (15,200)
Service Life
Concentration Risk [Line Items]
Decrease in net loss	3,300
Decrease in depreciation expense	$ 3,300
Servers
Concentration Risk [Line Items]
Expected average useful life			6 years	5 years

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Net Loss Per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Net Loss Per Share of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Net loss attributable to common stockholders, basic	$ (20,524)	$ (39,148)
Net loss attributable to common stockholders, diluted	$ (20,524)	$ (39,148)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	153,579	143,284
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	153,579	143,284
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.13)	$ (0.27)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.13)	$ (0.27)

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+ Details

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

+ References

+ Details

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

+ References + Details

Debt Instruments - Conversion Rights of the Notes (Narrative) (Details) - 2026, 2028, and 2030 Convertible Notes - Convertible Debt	3 Months Ended
	Mar. 31, 2026 day
Scenario One
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days	20
Debt instrument, convertible, threshold consecutive trading days	30
Debt instrument, convertible, threshold percentage of stock price trigger	130.00%
Scenario Two
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days	5
Debt instrument, convertible, threshold consecutive trading days	5
Debt instrument, convertible, threshold percentage of stock price trigger	98.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Stockholders' Equity - Employee Stock Purchase Plan (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 34,981	$ 25,582
Shares issued under employee stock purchase program (in shares)	0	0
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum employee contribution as a percentage of salary	15.00%
Stock plan offering period (in months)	6 months
Purchase price of common stock (as percent)	85.00%
Stock-based compensation expense	$ 900	$ 100

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Insider Trading Arrangements

3 Months Ended

Mar. 31, 2026

Trading Arrangements, by Individual

Non-Rule 10b5-1 Arrangement Adopted

false

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

Christopher B. Paisley [Member]

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

During the Company’s last fiscal quarter, the Company’s directors and officers (as defined in Rule 16a-1(f) under the Exchange Act) adopted, terminated, or modified the contracts, instructions or written plans for the purchase or sale of the Company’s securities set forth in the table below.

Type of Trading Arrangement

Name and Position

Action

Adoption/ Termination

Date

Rule 10b5-1*

Non-

Rule 10b5-1**

Total Shares of Class A Common Stock to be Sold

Total Shares of Class A Common Stock to be Purchased

Expiration Date

Christopher B. Paisley (1)

Adoption

2/26/2026

—

20,000

—

3/31/2027

* Contract, instruction or written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

** “Non-Rule 10b5-1 trading arrangement” as defined in Item 408(c) of Regulation S-K under the Exchange Act.

(1) On February 26, 2026, Christopher B. Paisley, a member of the Company's Board of Directors entered into a 10b5-1 Plan, providing for the potential sale of up to 20,000 shares of the Company's Common Stock. The plan expires on March 31, 2027, or upon the earlier completion of all authorized transactions under the plan.

Name

Christopher B. Paisley

Title

member of the Company's Board of Directors

Rule 10b5-1 Arrangement Adopted

true

2/26/2026

3/31/2027

398 days

20,000