Stockholders' Equity - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2026	Apr. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 36,322	$ 48,167
Total unrecognized stock-based compensation expense	$ 145,596
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	$ 92
Weighted-Average Expected Recognition Period (in years)	1 year 10 months 24 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized expense, RSUs and PSUs	$ 129,697
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	$ 15,807
Weighted-Average Expected Recognition Period (in years)	1 year 9 months 18 days
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 504	344
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	18,068	24,364
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	8,739	14,823
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 9,011	$ 8,636

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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