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Who left OpenX, and who still runs it
11,413 websites in the top 1M run OpenX, observed directly from the rendered page in the July 2026 crawl.
1,637
stopped running it that month
80
of those are 11–500 employees
3,552
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running OpenX
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Google Tag Manager 100%Cloudflare 96%Google Analytics 93%Google Publisher Tag 92%Snowplow Analytics 92%Cloudflare Bot Management 91%ID5 86%Open Graph 86%reCAPTCHA 84%Rubicon Project 79%
Share of a 3,000-domain sample of OpenX users that also run each.