Compare software

WappalyzerWhatRuns
Freemium

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

 Free

Free extension with no sign-up required.

Browser extension Browser extension
  • Immediate answer to what a site is built on, with no setup
  • One-click technology detection
  • Covers plugins, fonts, analytics and CDNs
  • The extension became closed source and the company monetises technology data
  • Detection relies on fingerprints and is sometimes wrong
  • Proprietary
  • Only a Chrome version is mentioned
Browser extension 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 24, 2026

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