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ClamAVMalwarebytes
Free

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

 Freemium

A free scanner is available; real-time protection, VPN and scam detection are part of paid…

Windows, macOS, Linux, Command line Windows, macOS, Android, iOS, Browser extension
  • Signature format is open, so anyone can write detections
  • Designed to be embedded in mail servers, file shares and upload pipelines
  • Available on Windows, macOS, Android and iOS
  • Combines malware scanning, VPN and scam detection
  • Detection rates trail the commercial engines in independent testing
  • Not a real-time desktop protection suite on its own
  • Most protection features require a paid plan
  • Closed source
Downloadable app Downloadable app, Browser extension
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.