Web servers
Who left IIS, and who still runs it
27,744 websites in the top 1M run IIS, observed directly from the rendered page in the July 2026 crawl.
4,784
stopped running it that month
417
of those are 11–500 employees
4,505
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running IIS
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Windows Server 100%Microsoft ASP.NET 90%jQuery 83%Google Analytics 48%Bootstrap 48%Google Font API 47%Cloudflare 43%Google Tag Manager 32%core-js 31%Open Graph 30%
Share of a 3,000-domain sample of IIS users that also run each.