v3.26.1
Cover
May 29, 2026
May 30, 2025
Cover [Abstract]    
Document Type 8-K  
Document Period End Date May 29, 2026  
Entity Registrant Name PubMatic, Inc.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-39748  
Entity Tax Identification Number 20-5863224  
Entity Address, Address Line One 601 Marshall St  
Entity Address, Address Line Two 4th Floor  
Entity Address, City or Town Redwood City  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94063  
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 PUBM  
Security Exchange Name NASDAQ  
Entity Emerging Growth Company   false
Entity Central Index Key 0001422930  
Amendment Flag false