Compare software

ZoneAlarmPortmaster
Freemium

Free firewall and free antivirus, with paid security suites.

 Freemium

Free and open source under the GPL 3.0. Network history search, per-app bandwidth and the…

Windows, macOS, Android, iOS Windows, Linux
  • Free outbound firewall that controls program network access
  • Free antivirus option
  • Blocks known trackers and malware with no configuration
  • Live list of every connection, attributed to the program that made it
  • Most extra protections require a paid suite
  • Closed source
  • Windows and Linux only
  • Network history search and bandwidth figures are paid features
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 1, 2026

Checked September 21, 2026

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