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That one website that shows what a website is built with

Why it's the pick

BuiltWith has the biggest database of web technologies and lists a site's CMS, analytics, ad tags, hosting, payment tools and more. Basic lookups are free, but you may have to pass a quick image check first, and the lead lists and reports cost money.

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3 good alternatives

W3Techs Site Info w3techs.com Free tech profile of a site: CMS, server, languages and more FreeNo signup Link checked Oct 9
What CMS? whatcms.org Detects which CMS or site builder a website runs on Free tierNo signup Link checked Oct 9
Netcraft Site Report sitereport.netcraft.com Shows a site's host, network, SSL and trackers FreeNo signup Link checked Oct 9

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