BuiltWith – https://builtwith.com/ Web technology information profiler tool. Find out what a website is built with.
Netcraft – https://sitereport.netcraft.com/ Using results from Netcraft’s internet data mining, find out the technologies and infrastructure used by any site.
RESCAN – https://rescan.io/ Find the technology stack behind any website. Get the lists of websites using any technology.
SimilarTech – https://www.similartech.com/ Website Profiler, Lead Generation, Market Research and Competitive Intelligence tool providing technology adoption and usage analytics for the internet.
W3 Techs – https://w3techs.com/sites W3Techs identifies which web technologies such as CMS, programming language, web server and hosting provider a particular website is using
Wappalyzer – https://www.wappalyzer.com/ Find out the technology stack of any website. Create lists of websites that use certain technologies, with company and contact details. Use our tools for lead generation, market analysis and competitor research.
What CMS – http://whatcms.org/ WhatCMS.org analyzes website content to determine which Content Management System is being used. We can detect over 400 different CMS.
WhatRuns – https://www.whatruns.com/ A free browser extension that helps you identify technologies used on any website at the click of a button.