| Cover Page | Nov. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 30, 2021 |
| Entity Registrant Name | CS Disco, Inc. |
| Entity File Number | 001-40624 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 46-4254444 |
| Entity Address, Address Line One | 3700 N. Capital of Texas Hwy. |
| Entity Address, Address Line Two | Suite 150 |
| Entity Address, City or Town | Austin |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78746 |
| City Area Code | 833 |
| Local Phone Number | 653-4726 |
| 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 $0.005 |
| Trading Symbol | LAW |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001625641 |
| Amendment Flag | false |
