Compare software

Windows Firewall ControlZoneAlarm
Free

Free to download and use.

 Freemium

Free firewall and free antivirus, with paid security suites.

Windows Windows, macOS, Android, iOS
  • Prompts when unknown programs try to connect out
  • One-click switching between filtering modes
  • Free outbound firewall that controls program network access
  • Free antivirus option
  • Windows only
  • Medium filtering needs rules for every program you use
  • Most extra protections require a paid suite
  • Closed source
Downloadable app Downloadable app
Closed source Closed source
License not stated License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 24, 2026

Checked October 1, 2026

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