Stockholders’ Deficit - Schedule of Reserved Shares of Common Stock (Details) - shares shares in Thousands	Jul. 31, 2025	Jan. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved (in shares)	98,844	93,618
2024 Stock Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved (in shares)	61,681	57,591
2024 Employee Stock Purchase Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved (in shares)	5,603	4,201
Employee stock option | 2014 Stock Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved (in shares)	9,129	9,570
Restricted stock units | 2014 Stock Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved (in shares)	12,530	18,039
Restricted stock units | 2024 Stock Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved (in shares)	9,901	4,217