Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Deferred tax assets
Net operating loss carryforwards	$ 675,515	$ 400,277
Research and other credit carryforwards	210,753	144,068
Intangible assets	104,051	117,620
Stock-based compensation	85,705	71,140
Deferred revenue	271,640	209,357
Accrued expenses	39,562	29,833
Operating lease liabilities	26,460	17,418
Capitalized research and development	463,335	473,889
Other, net	12,176	13,898
Gross deferred assets	1,889,197	1,477,500
Less: Valuation allowance	(1,523,498)	(1,203,216)	$ (1,000,000)
Total deferred tax assets	365,699	274,284
Deferred tax liabilities
Property and equipment, net	(104,395)	(64,576)
Capitalized commissions	(201,954)	(171,349)
Operating right-of-use assets	(25,230)	(16,853)
Intangible assets	(4,963)	(6,921)
Other, net	(242)	0
Total deferred tax liabilities	(336,784)	(259,699)
Net deferred tax assets	$ 28,915	$ 14,585

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Deferred Tax Liabilities, Deferred Revenue

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Amount of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from in-process research and development cost acquired in business combination or from joint venture formation or both.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from provisions, reserves, allowances, and accruals, classified as other.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from capitalized costs classified as other.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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