Compare software

WhatRunsWappalyzer
Free

Free extension with no sign-up required.

 Freemium

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

Browser extension Browser extension
  • One-click technology detection
  • Covers plugins, fonts, analytics and CDNs
  • Immediate answer to what a site is built on, with no setup
  • Proprietary
  • Only a Chrome version is mentioned
  • The extension became closed source and the company monetises technology data
  • Detection relies on fingerprints and is sometimes wrong
Browser extension Browser extension
Closed source Closed source
License not stated License not stated
No account needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked September 24, 2026

Checked September 22, 2026

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