Segment Reporting - Summary of Consolidated Net Loss (Details) $ in Thousands	12 Months Ended
	Jan. 31, 2025 USD ($) segment	Jan. 31, 2024 USD ($)	Jan. 31, 2023 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	1
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Total revenue	$ 886,544	$ 627,892	$ 599,819
Less:
Interest expense	41,253	30,295	11,709
Income tax expense	6,368	26,689	8,596
Plus:
Interest income	25,353	11,216	5,140
Segment net loss	(1,154,820)	(354,158)	(277,746)
Software And Services
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Total revenue	886,544	627,892	599,819
Less:
Remaining cost of revenue	24,593	40,235	112,567
Remaining research and development expenses	226,235	194,639	163,450
Remaining sales and marketing expenses	531,154	475,687	411,702
Remaining general and administrative expenses	131,462	95,431	82,060
Stock-based compensation expense	913,913	5,715	6,954
Depreciation and amortization	27,970	24,962	22,680
Amortization of intangibles	3,673	1,676	822
Interest expense	41,253	30,295	11,709
Income tax expense	6,368	26,689	8,596
Other items	(1,480)	1,884	1,033
Plus:
Interest income	25,353	11,216	5,140
Segment net loss	(1,154,820)	(354,158)	(277,746)
Subscription
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Total revenue	828,740	537,869	385,272
Subscription | Software And Services
Less:
Adjusted subscription cost of revenue	$ 161,576	$ 96,053	$ 61,132