Basic and Diluted Loss per Share - Components of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Numerator
Net loss attributable to nCino, Inc.	$ (30,688)	$ (15,008)
Denominator
Weighted-average common shares outstanding, basic (in shares)	109,998,637	94,402,265
Weighted-average common shares outstanding, diluted (in shares)	109,998,637	94,402,265
Basic loss per share attributable to nCino, Inc. (in USD per share)	$ (0.28)	$ (0.16)
Diluted loss per share attributable to nCino, Inc. (in USD per share)	$ (0.28)	$ (0.16)