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ClamAVAvast Free Antivirus
Free

Free and open source under the GPL 2.0, maintained by Cisco Talos.

 Freemium

The antivirus is free; Avast sells a VPN and other paid products.

Windows, macOS, Linux, Command line Windows, macOS, Android
  • Signature format is open, so anyone can write detections
  • Designed to be embedded in mail servers, file shares and upload pipelines
  • Free antivirus from a large vendor
  • Available for Windows, macOS and Android
  • Detection rates trail the commercial engines in independent testing
  • Not a real-time desktop protection suite on its own
  • Closed source
  • Promotes paid products from within the free offer
Downloadable app Downloadable app
Open source Closed source
License: GPL-2.0 License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 21, 2026

Checked September 23, 2026

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