Stock-Based Compensation - Additional Information (Details) $ in Thousands	3 Months Ended
Apr. 30, 2024 USD ($) Plan shares	Apr. 30, 2023 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of employee equity plans \| Plan	2
Share-based compensation expense	$ 51,162	$ 47,277
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining weighted-average period	2 years 10 months 6 days
Unrecognized stock-based compensation expense	$ 468,800
2015 Equity Incentive Plan \| Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares common stock reserved for issuance \| shares	27,494,360
2015 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining weighted-average period	1 year 3 months 10 days
Unrecognized stock-based compensation expense	$ 12,400
2015 Employee Stock Purchase Plan \| Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares common stock reserved for issuance \| shares	3,298,894
Executive Bonus Plans
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense	$ 4,000
Fiscal 2024 Executive Bonus Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 11,500

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