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Stockholders’ Equity and Equity Incentive Plans (Tables)
 3 Months Ended
Apr. 30, 2022
Stockholders' Equity Note [Abstract]  
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)
Balance as of January 31, 20226,195,205 $8.08 6.0$905,744 
Exercised(543,518)$5.99 $60,844 
Canceled/forfeited/expired(57,576)$22.75 
Outstanding as of April 30, 20225,594,111 $8.13 5.8$511,520 
Vested and expected to vest as of April 30, 20225,594,111 $8.13 5.8$511,520 
Exercisable as of April 30, 20224,823,299 $6.25 5.6$450,113 
Summary of Restricted Stock Units (RSUs) Activity Under Equity Incentive Plan
A summary of restricted stock unit (“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, 20225,546,366 $232.58 
Granted4,948,266 $108.15 
Vested(467,160)$230.67 
Canceled/forfeited(342,851)$192.07 
Unvested as of April 30, 20229,684,621 $170.51 
Summary of Stock-based Compensation Expense by Line Item
The stock-based compensation expense by line item in the accompanying condensed consolidated statements of operations is summarized as follows:
Three Months Ended April 30,
20222021
(in thousands)
Cost of revenue$31,150 $14,066 
Research and development55,751 20,819 
Sales and marketing93,795 51,812 
General and administrative28,667 12,272 
Total stock-based compensation expense209,363 98,969 
Benefit from income taxes(42,915)— 
Total stock-based compensation expense recorded to net income$166,448 $98,969