Common Stock and Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2023 USD ($) $ / shares shares	Jan. 31, 2024 USD ($) purchase_period $ / shares shares	Jan. 31, 2023 USD ($) $ / shares shares	Jan. 31, 2022 USD ($) $ / shares shares
Subsidiary, Sale of Stock [Line Items]
Treasury stock. beginning balance (in shares) | shares	2,331,002	2,331,002	0
Shares Acquired, Average Cost Per Share | $ / shares	$ 21.45
Common stock repurchased	$ 50,000	$ 50,000
Number of shares authorized for grant (in shares) | shares		31,519,553	28,881,327
Options granted (in shares) | shares		61,719
Weighted average grant date fair value of stock options (in dollars per share) | $ / shares		$ 13.00	$ 16.46	$ 18.26
Aggregate intrinsic value of stock options exercised		$ 22,700	$ 50,800	$ 91,000
Unrecognized compensation cost related to unvested stock options		2,100
Stock-based compensation expense		$ 127,152	$ 109,907	$ 70,033
Shares of common stock issued under the ESPP (in shares) | shares		536,151	495,432	345,051
Minimum
Subsidiary, Sale of Stock [Line Items]
Range of shares to be received (as a percent)		0.00%
Maximum
Subsidiary, Sale of Stock [Line Items]
Range of shares to be received (as a percent)		200.00%
Research and development
Subsidiary, Sale of Stock [Line Items]
Stock-based compensation expense		$ 44,800	$ 39,012	$ 23,764
General and administrative
Subsidiary, Sale of Stock [Line Items]
Stock-based compensation expense		44,421	34,264	23,506
Sales and marketing
Subsidiary, Sale of Stock [Line Items]
Stock-based compensation expense		$ 30,345	29,804	19,012
Stock options
Subsidiary, Sale of Stock [Line Items]
Unrecognized compensation cost related to unvested awards, period for recognition (in years)		1 year 7 months 6 days
RSUs
Subsidiary, Sale of Stock [Line Items]
Vesting period (in years)		4 years
Unrecognized compensation cost related to unvested awards, period for recognition (in years)		2 years 3 months 18 days
Unrecognized compensation cost related to unvested RSUs		$ 214,400
Employee Stock Purchase Plan
Subsidiary, Sale of Stock [Line Items]
Number of shares available for grant (in shares) | shares		3,346,858
Offering period (in months)		24 months
Number of purchase periods within each offering period | purchase_period		4
Purchase period (in months)		6 months
Purchase price as a percentage of fair market value of stock on the offering date or the purchase date		85.00%
Stock-based compensation expense		$ 6,000	4,900	4,700
Amount withheld on behalf of employees for future purchase		$ 10,200	$ 10,000	$ 9,700
Purchase price of common stock issued under the ESPP (in dollars per share) | $ / shares		$ 19.20	$ 19.93	$ 22.44
Performance Shares
Subsidiary, Sale of Stock [Line Items]
Vesting period (in years)		3 years
Unrecognized compensation cost related to unvested awards, period for recognition (in years)		1 year 3 months 18 days
Performance period (in years)		1 year
Unrecognized compensation cost related to unvested RSUs		$ 4,900
Stock options and RSUs
Subsidiary, Sale of Stock [Line Items]
Number of shares available for grant (in shares) | shares		17,178,454	13,581,239
Common Stock
Subsidiary, Sale of Stock [Line Items]
Shares of common stock issued under the ESPP (in shares) | shares		536,151	495,432	345,051