Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Other Comprehensive Income (Loss)	Accumulated Deficit
Balance, beginning of year (in shares) at Jan. 31, 2021		93,643,759
Balance, beginning of year at Jan. 31, 2021	$ 425,179	$ 47	$ 585,956	$ 240	$ (161,064)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance related to business combinations (in shares)		12,762,146
Stock issuance related to business combinations, net of issuance costs of $210	647,299	$ 7	647,292
Exercise of stock options (in shares)		2,758,904
Exercise of stock options	13,907	$ 1	13,906
Stock issuance upon vesting of restricted stock units (in shares)		559,191
Stock issuance under the employee stock purchase plan (in shares)		54,542
Stock issuance under the employee stock purchase plan	2,543		2,543
Stock-based compensation	28,455		28,455
Other comprehensive income (loss)	(312)			(312)
Net loss attributable to nCino, Inc., including adjustment to redeemable non-controlling interest	(49,446)		(894)		(48,552)
Balance, end of year (in shares) at Jan. 31, 2022		109,778,542
Balance, end of year at Jan. 31, 2022	1,067,625	$ 55	1,277,258	(72)	(209,616)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		579,662
Exercise of stock options	3,750	$ 1	3,749
Stock issuance upon vesting of restricted stock units (in shares)		883,561
Stock issuance under the employee stock purchase plan (in shares)		182,367
Stock issuance under the employee stock purchase plan	4,450		4,450
Stock-based compensation	50,207		50,207
Other comprehensive income (loss)	766			766
Net loss attributable to nCino, Inc., including adjustment to redeemable non-controlling interest	(102,720)		(1,995)		(100,725)
Balance, end of year (in shares) at Jan. 31, 2023		111,424,132
Balance, end of year at Jan. 31, 2023	$ 1,024,078	$ 56	1,333,669	694	(310,341)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	785,794	785,794
Exercise of stock options	$ 4,469	$ 1	4,468
Stock issuance upon vesting of restricted stock units (in shares)		1,277,625
Stock issuance under the employee stock purchase plan (in shares)		196,748
Stock issuance under the employee stock purchase plan	4,661		4,661
Stock-based compensation	58,012		58,012
Other comprehensive income (loss)	302			302
Net loss attributable to nCino, Inc., including adjustment to redeemable non-controlling interest	(42,346)		71		(42,417)
Balance, end of year (in shares) at Jan. 31, 2024		113,684,299
Balance, end of year at Jan. 31, 2024	$ 1,049,176	$ 57	$ 1,400,881	$ 996	$ (352,758)