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Who left Sizmek, and who still runs it
232 websites in the top 1M run Sizmek, observed directly from the rendered page in the July 2026 crawl.
98
stopped running it that month
10
of those are 11–500 employees
13
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Sizmek
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Google Analytics 95%Google Tag Manager 90%core-js 87%Open Graph 82%Facebook Pixel 82%jQuery 81%Cloudflare 78%HSTS 72%Cloudflare Bot Management 59%Amazon Web Services 49%
Share of a 232-domain sample of Sizmek users that also run each.