Cover	Feb. 26, 2024
Cover [Abstract]
Document Type	8-K
Document Period End Date	Feb. 26, 2024
Entity Registrant Name	PubMatic, Inc.
Entity Incorporation, State or Country Code	DE
Entity File Number	001-39748
Entity Tax Identification Number	20-5863224
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