Net Loss Per Share - Schedule of Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss Per Share (Details) - shares	6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	0	42,465,855
Stock Options with Service only Conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	4,419,888	6,207,303
Unvested RSUs with service-only conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	5,288,879	3,980,262
Stock Options with Performance or Market Conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	779,488	1,140,924
Unvested Early Exercise of Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	31,754	40,088
Unvested RSAs with service-only conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	0	39,872
Acquisition Indemnity Shares Withheld
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	0	41,959
Unvested RSUs with performance conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted net loss per share	7,364,442	1,519,746