The market share for Episerver decreased by 0.002 percentage points (from 0.028% to 0.026%) for all sites, more than any other segment during the same period of time.
We detected the following sites were using Episerver
optimizely.com
rsc.org
mimecast.net
iata.org
aap.org
bredbandsbolaget.se
How We Detect Installations of Episerver
Meta
A CMS will sometimes include a meta tag within the html of each page. This is usually a "generator" tag like <meta name="generator" content="What CMS" /> but could also be "application-name", "Powered-By" or anyting else the CMS creators decide to use.
Headers
HTTP headers can provide some of the best clues about a site's CMS. The values of set-cookie and x-powered-by headers are the most common and easiest to find.
Markup
If a CMS doesn't have meta tags, it will often have other uniquely identifiable html markup. This can range from unique html comments, ids or classes.