Net Loss Per Share Attributable To Common Stockholders - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Numerator:
Net loss	$ (70,304)	$ (98,858)	$ (266,711)	$ (284,998)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	296,650,848	280,635,022	292,755,742	275,867,765
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	296,650,848	280,635,022	292,755,742	275,867,765
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.24)	$ (0.35)	$ (0.91)	$ (1.03)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.24)	$ (0.35)	$ (0.91)	$ (1.03)