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Equity Plans and Stock-based Compensation (Tables)
 12 Months Ended
Jan. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-based Compensation Expense
The following sets forth the total stock-based compensation expense for employee equity plans included in the Company’s consolidated statements of operations:
Year Ended January 31,
202320222021
(in thousands)
Cost of revenue$4,351 $3,782 $115 
Research and development37,967 25,461 1,807 
Sales and marketing17,393 9,154 1,501 
General and administrative33,639 28,934 1,524 
Total stock-based compensation expense$93,350 $67,331 $4,947 
Share-based Payment Arrangement, Option, Activity A summary of option activity under the 2017 and 2007 Plans at January 31, 2022 and changes during the periods then ended is presented in the following table:
Number of
Stock Option
Awards		Weighted
Average
Exercise Price		Weighted
Average
Remaining Contractual term
(in years)		Aggregate
Intrinsic Value
(in thousands)
Outstanding as of January 31, 2022
22,200,869 $0.68 6.6$292,362 
Granted— $— 
Exercised(4,201,592)$0.60 
Cancelled(398,753)$0.76 
Outstanding as of January 31, 2023
17,600,524 $0.70 5.6$201,352 
Options vested and expected to vest as of January 31, 2023
17,578,098 $0.70 5.6$201,097 
Exercisable as of January 31, 2023
14,356,582 $0.69 5.2$164,436 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The weighted-average assumptions in the Monte Carlo valuation model used to determine the fair value of PRSUs granted during the year ended January 31, 2023 were as follows:
Year Ended January 31, 2023
Expected volatility
72.1% - 74.0%
Risk-free interest rate
2.8% - 3.3%
Dividend rate0.0 %
Expected term (in years)
0.3 - 4.8
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
The weighted-average assumptions in the Black-Scholes option-pricing models used to determine the fair value of ESPP rights granted during the year ended January 31, 2023 were as follows:

Year Ended January 31,
20232022
Expected volatility
64.9% - 72.2%
61.8% - 73.5%
Risk-free interest rate
0.8% - 3.6%
0.1% - 0.3%
Dividend rate0.0 %0.0 %
Expected term (in years)
0.5 - 2.0
0.4 - 1.9