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Who left Rubicon Project, and who still runs it
12,752 websites in the top 1M run Rubicon Project, observed directly from the rendered page in the July 2026 crawl.
1,059
stopped running it that month
77
of those are 11–500 employees
3,534
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Rubicon Project
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 99%Cloudflare 97%Cloudflare Bot Management 94%Google Analytics 91%Google Publisher Tag 90%Open Graph 87%ID5 85%Snowplow Analytics 83%reCAPTCHA 82%Prebid 81%
Share of a 3,000-domain sample of Rubicon Project users that also run each.