We detected the following sites were using Pelican
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.
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.
In addition to detecting the CMS, in some cases we are able to accurately detect which version of the CMS is being used.
Dedicated Content Management System Detection