Cover - shares	9 Months Ended
	Sep. 30, 2025	Nov. 07, 2025
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	001-40103
Entity Registrant Name	AlTi Global, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	92-1552220
Entity Address, Address Line One	22 Vanderbilt Avenue, 27th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10017
City Area Code	(212)
Local Phone Number	396-5900
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	ALTI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Central Index Key	0001838615
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		102,464,812
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		44,188,561