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AppNexus
RebrandedNew York, New York, United States · Founded 2007
1001-5000 employees · N/A
Sourced & current · updated Jun 13, 2026Website
AppNexus was a leading independent programmatic advertising technology platform that powered real-time bidding and ad exchanges before being acquired by AT&T in 2018.
Where they sit
Stack tier: Core Platforms (S)
Demand Side Platform (DSP)Supply Side Platform (SSP)Programmatic Platform
AppNexus was one of the largest independent programmatic advertising platforms globally before its acquisition, competing directly with Google's DoubleClick and serving as a preferred alternative for publishers and buyers seeking an open, non-walled-garden ecosystem.