Net Loss Per Share Attributable To Common Stockholders - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Numerator:
Net loss attributable to Class A and Class B common stockholders	$ (288,441)	$ (338,693)	$ (378,678)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	314,811,783	294,923,536	277,802,861
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	314,811,783	294,923,536	277,802,861
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.92)	$ (1.15)	$ (1.36)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.92)	$ (1.15)	$ (1.36)