v3.22.0.1
Stockholders' Equity and Equity Incentive Plans (Tables)
 12 Months Ended
Jan. 31, 2022
Equity [Abstract]  
Schedule of Stock by Class Reserved for Future Issuance
We have the following shares of Class A common stock reserved for future issuance:
 
As of January 31,
 20222021
Stock options outstanding6,195,205 9,239,504 
RSUs outstanding5,546,366 4,510,730 
ESPP purchase rights outstanding 1,784,687 724,883 
Remaining shares available for future issuance under the 2011 and 2019 plan56,620,720 44,584,783 
Remaining shares available for future issuance under the ESPP10,685,867 9,648,574 
Total shares of Class A common stock reserved80,832,845 68,708,474 
Summary of Stock Option Activity Under Equity Incentive Plan
A summary of stock option activity under our equity incentive plan and related information is as follows:
Stock Options
 Outstanding
Stock
Options		Weighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic
Value
 (in thousands, except share, life and per share data)
Outstanding as of January 31, 20219,239,504 $7.17 7.0$3,371,457 
Exercised(2,881,485)$5.00 $842,989 
Canceled/forfeited/expired(162,814)$11.24 
Outstanding as of January 31, 20226,195,205 $8.08 6.0$905,744 
Vested and expected to vest as of January 31, 20226,195,205 $8.08 6.0$905,744 
Exercisable as of January 31, 20224,898,249 $5.72 5.9$727,701 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The Black-Scholes assumptions used to value the employee options at the grant dates are as follows:
Year Ended January 31, 2020
Expected term (years)
5.0 - 6.1
Expected volatility
49.9% - 53.2%
Risk-free interest rate
1.6% - 2.5%
Expected dividend yield—
Summary of Restricted Stock Units (RSUs) Activity Under Equity Incentive Plan
A summary of RSU activity under our equity incentive plan and related information is as follows:
RSUs
Unvested
RSUs		Weighted-Average
Grant Date Fair Value Per Share
Unvested as of January 31, 20214,510,730 $194.57 
Granted3,195,949 $265.12 
Vested(1,768,702)$190.36 
Canceled/forfeited(391,611)$250.92 
Unvested as of January 31, 20225,546,366 $232.58 
Summary of Assumptions for Estimating Fair Value of ESPP Purchase Rights We estimated the fair value of ESPP purchase rights using a Black-Scholes option-pricing model with the following assumptions:
Year Ended January 31,
20222021
Expected term (years)
0.5 - 2.1
0.5 - 2.1
Expected volatility
40.3% - 75.0%
40.3% - 75.0%
Risk-free interest rate
0.0% - 2.5%
0.1% - 2.5%
Expected dividend yield——
Summary of Stock-based Compensation Expense by Line Item
The stock-based compensation expense by line item in the accompanying consolidated statements of operations is summarized as follows:
Year Ended January 31,
202220212020
(in thousands)
Cost of revenue$69,612 $34,960 $7,860 
Research and development113,000 50,161 11,645 
Sales and marketing229,297 146,377 41,465 
General and administrative65,378 44,320 12,139 
Total stock-based compensation expense477,287 275,818 73,109 
Benefit from income taxes(84,245)— — 
Total stock-based compensation expense recorded to net income$393,042 $275,818 $73,109