OpenX

Pasadena, California, United States · Founded 2008

501-1000 employees · NASDAQ:OPENX

Sourced & current · updated Jul 6, 2026Website

OpenX is a global leader in digital advertising technology, helping publishers and buyers monetize their digital assets through a suite of programmatic tools and solutions.

Where they sit

Stack tier: Ecosystem Services (A)

Supply Side Platform (SSP)Ad ExchangeProgrammatic Platform

One of the largest independent programmatic ad exchanges globally, competing directly with Google, Magnite, and PubMatic as a premium SSP and ad exchange