Builders

Which builder made this site?

Every builder leaves something behind: a meta tag, a script host, a name inside the JavaScript bundle. This is what each one leaves, how to check it by hand, and what its sites usually get wrong. 78 rules are live right now.

AI builders

A machine wrote the site from a prompt

Lovable AI builder *.lovable.app v0 by Vercel AI builder v0-*.vercel.app Bolt.new AI builder *.bolt.host Replit AI builder *.replit.app Base44 AI builder *.base44.app Durable AI builder durable.co

Visual builders

A person designed it with a tool

These never produce an "AI-built" verdict on their own. A site is only called AI-built when an AI builder's own fingerprint is found.

Framer visual builder *.framer.website Webflow visual builder *.webflow.io Wix visual builder *.wixsite.com Squarespace visual builder *.squarespace.com

Every verdict is computed from named rules with weights you can read on the method page. Names and logos are trademarks of their owners.