Stockholders' Equity - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 214,843	$ 211,271	$ 202,418
Total unrecognized stock-based compensation expense	$ 198,639
Weighted-Average Expected Recognition Period (in years)	1 year 10 months 24 days
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized expense, stock options	$ 105
Weighted-Average Expected Recognition Period (in years)	2 years 1 month 6 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized expense, RSUs and PSUs	$ 183,614
Weighted-Average Expected Recognition Period (in years)	1 year 10 months 24 days
Performance-based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized expense, RSUs and PSUs	$ 14,920
Weighted-Average Expected Recognition Period (in years)	1 year 10 months 24 days
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1,803	1,387	1,549
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	106,174	115,953	112,619
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	58,089	64,320	59,217
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 48,777	$ 29,611	$ 29,033