OpenX is an independent supply-side platform (SSP) that operates one of the largest ad exchanges in the programmatic advertising ecosystem. The company serves publishers and advertisers globally, processing over 500 billion ad requests daily. Its platform connects more than 2 million direct publisher domains with over 200,000 brands, serving more than 1 million ad creatives.
The company's technical infrastructure is cloud-native, built around core domains including programmatic advertising, identity resolution, and omnichannel targeting. Its headquarters is in Pasadena, California, with operations across North America, Europe, Asia, and Australia.
OpenX has established itself as a notable player in the ad technology sector, operating independently rather than as part of a larger media conglomerate. The company holds CarbonNeutral® certification and Net-Zero verification, making it the first ad exchange to achieve both designations, reflecting its stated commitment to responsible media practices.
