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ZoneAlarm vs simplewall: catalog facts
ZoneAlarm	simplewall
Freemium Free firewall and free antivirus, with paid security suites.	Free Free and open source under the GPL 3.0.
Windows, macOS, Android, iOS	Windows
Free outbound firewall that controls program network access Free antivirus option	A plain allow and block list rather than a stream of pop-ups Internal block list aimed at Windows telemetry
Most extra protections require a paid suite Closed source	The project itself says it is for advanced users Not a Windows Firewall interface; it uses a separate rule system
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
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

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