Segment Reporting - Summary of Consolidated Net Loss (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025 USD ($)	Jul. 31, 2024 USD ($)	Jul. 31, 2025 USD ($) segment	Jul. 31, 2024 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			1
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Total revenue	$ 309,860	$ 204,951	$ 588,341	$ 392,266
Less:
Stock-based compensation expense	88,457	105,018	161,997	735,348
Interest expense	5,241	10,245	15,054	20,869
Income tax expense	1,837	4,220	3,111	3,169
Plus:
Interest income	12,193	7,278	19,889	10,220
Net loss	(95,929)	(176,930)	(198,033)	(909,021)
Software And Services
Less:
Remaining cost of revenue	4,186	5,805	9,310	12,316
Remaining research and development expenses	65,318	55,849	125,201	114,903
Remaining sales and marketing expenses	150,878	132,168	295,282	270,090
Remaining general and administrative expenses	36,112	27,376	69,320	60,240
Stock-based compensation expense	88,457	105,018	161,997	735,348
Depreciation and amortization	7,900	6,729	15,718	13,683
Amortization of acquired intangibles	1,223	923	2,183	1,826
Interest expense	5,241	10,245	15,054	20,869
Income tax expense	1,837	4,220	3,111	3,169
Other items	6,581	1,450	12,203	2,073
Plus:
Interest income	12,193	7,278	19,889	10,220
Net loss	(95,929)	(176,930)	(198,033)	(909,021)
Subscription
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Total revenue	296,957	191,315	562,618	363,510
Subscription | Software And Services
Less:
Adjusted subscription cost of revenue	$ 50,249	$ 39,376	$ 96,884	$ 76,990