PubMatic, Inc. is an independent advertising technology company based in Redwood City, California. It provides a cloud infrastructure platform that enables real-time programmatic advertising transactions for digital publishers and app developers. The company's sell-side platform (SSP) helps content creators monetize their inventory across various formats, including connected TV (CTV), mobile app, video, and desktop.
PubMatic defines revenue concentration by individual publisher, and no publisher represented more than 10% of revenue in 2023, 2024, or 2025. On the demand side, however, the company depends on a limited number of large demand-side platforms (DSPs) for a large percentage of impressions purchased, and its two largest DSP relationships are with Google and The Trade Desk. As of December 31, 2025, three buyers accounted for 24%, 16%, and 14%, respectively, of accounts receivable (versus two buyers at 44% and 11% as of December 31, 2024).