| Cover | Aug. 31, 2023 | Aug. 15, 2023 |
| Cover [Abstract] | ||
| Entity Registrant Name | AlTi Global, Inc. | |
| Document Type | 8-K | |
| Document Period End Date | Sep. 18, 2023 | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-40103 | |
| Entity Tax Identification Number | 92-1552220 | |
| Entity Address, Address Line One | 520 Madison Avenue, 21st Floor | |
| Entity Address, City or Town | New York | |
| Entity Address, State or Province | NY | |
| Entity Address, Postal Zip Code | 10022 | |
| Local Phone Number | 396-5904 | |
| City Area Code | (212) | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Class A common stock, par value $0.0001 per share | |
| Trading Symbol | ALTI | |
| Security Exchange Name | NASDAQ | |
| Entity Emerging Growth Company | true | |
| Entity Ex Transition Period | false | |
| Entity Central Index Key | 0001838615 | |
| Amendment Flag | false |
