Equity Incentive Plan - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Jan. 31, 2025
Number of Stock Options Outstanding
Beginning balance (in shares)	40,971,097
Granted (in shares)	3,571,419
Exercised (in shares)	(2,894,372)
Cancelled/forfeited/expired (in shares)	(1,908,822)
Ending balance (in shares)	39,739,322		40,971,097
Vested and expected to vest as of end of period (in shares)	39,739,322
Exercisable as of end of period (in shares)	29,397,559
Weighted-Average Exercise Price per Share
Beginning balance (in dollars per share)	$ 12.80
Granted (in dollars per share)	23.35
Exercised (in dollars per share)	8.19
Cancelled/forfeited/expired (in dollars per share)	16.41
Ending balance (in dollars per share)	13.90		$ 12.80
Vested and expected to vest as of end of period (in dollars per share)	13.90
Exercisable as of end of period (in dollars per share)	$ 12.12
Weighted- Average Remaining Contractual Life (Years)
Outstanding, weighted average remaining contractual term (in years)	6 years 4 months 24 days		7 years
Vested and expected to vest as end of period, weighted average remaining contractual term (in years)	6 years 4 months 24 days
Vested and expected to vest as end of period, weighted average remaining contractual term (in years)	5 years 7 months 6 days
Aggregate Intrinsic Value
Outstanding, aggregate intrinsic value	$ 253,242		$ 402,471
Exercises, aggregate intrinsic value	48,309	$ 3,100
Vested and expected to vest, aggregate intrinsic value	253,242
Exercisable, aggregate intrinsic value	$ 239,926