| Cover | Jun. 02, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jun. 2, 2021 |
| Entity Registrant Name | nCino, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39380 |
| Entity Tax Identification Number | 46-4353148 |
| Entity Address, Address Line One | 6770 Parker Farm Drive |
| Entity Address, City or Town | Wilmington |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 28405 |
| City Area Code | 888 |
| Local Phone Number | 676-2466 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.0005 per share |
| Trading Symbol | NCNO |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001566895 |
| Amendment Flag | false |
