OpenX

Pasadena, California, United States · Founded 2007

201-500 employees · NASDAQ:OPENX

Sourced & current · updated Oct 26, 2026Website

OpenX Technologies, Inc. is an independent omnichannel supply-side platform (SSP) supporting programmatic advertising across connected TV, mobile apps, mobile web, and desktop inventory.

Where they sit

Stack tier: Ecosystem Services (A)

Supply Side Platform (SSP)Ad ExchangeProgrammatic Platform

Independent omnichannel SSP competing with major exchange and SSP players, differentiated by supply-side curation tools and transparency offerings for both publishers and buyers