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WappalyzerW3Techs Site Info
Freemium

The extension is free. Bulk lookups and the API are paid.

 Free

The website lookup, bookmarklet and extensions are free to use; a separate API is offered.

Browser extension Web, Browser extension
  • Immediate answer to what a site is built on, with no setup
  • Identifies CMS, language, web server and hosting provider
  • Bookmarklet and Firefox and Chrome extensions for the current page
  • The extension became closed source and the company monetises technology data
  • Detection relies on fingerprints and is sometimes wrong
  • Shows only what can be detected from outside the site
  • Website carries advertising
Browser extension Web application, Browser extension
Closed source Closed source
License not stated License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Needs internet

Checked September 22, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.