Free tool
Free Tech Stack Lookup
See what any website is built with
Creates a free account with 500 credits — no card, and the result is waiting when you land.
Why this needs an account
Every one of these numbers is bought from a data provider per request. A checker that answered anonymously would be a bill anyone could run up, so instead you get a free account with real credits and the answer comes out of those. No card, and nothing expires on a timer.
The same credits open every other tool too, which is usually the more useful discovery.
The full tool
Pick a technology — a CMS, an analytics tag, a payment processor — or paste a literal snippet of HTML, and get the sites that carry it, with domain rank, country and detected stack. Every other tool here starts from a domain you already know; this one hands you the list.
See Lead Finder