Balance Sheet Components - Accrued expenses and other current liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2025	Jan. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued expenses	$ 31,777	$ 30,983
Accrued bonuses	27,938	49,104
Accrued sales commissions	17,118	27,627
Accrued payroll-related expenses, taxes, and benefits	56,230	38,533
Operating lease liabilities	12,423	10,087
Other	3,348	6,268
Total accrued expenses and other current liabilities	$ 148,834	$ 162,602