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, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Numerator:
Net loss	$ (98,858)	$ (68,595)	$ (284,998)	$ (199,392)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	280,635,022	262,999,535	275,867,765	143,199,215
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	280,635,022	262,999,535	275,867,765	143,199,215
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.35)	$ (0.26)	$ (1.03)	$ (1.39)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.35)	$ (0.26)	$ (1.03)	$ (1.39)