v3.26.1
Cover
May 11, 2026
Mar. 11, 2026
Cover [Abstract]    
Document Type 8-K  
Document Period End Date May 11, 2026  
Registrant Name Viant Technology Inc.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-40015  
Entity Tax Identification Number 85-3447553  
Entity Address, Address Line One   2722 Michelson Drive
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town   Irvine
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92612  
City Area Code 949  
Local Phone Number 861-8888  
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 $0.001 per share  
Trading Symbol DSP  
Security Exchange Name NASDAQ  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Central Index Key 0001828791  
Amendment Flag false