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simplewall vs Windows Firewall Control: catalog facts
simplewall	Windows Firewall Control
Free Free and open source under the GPL 3.0.	Free Free to download and use.
Windows	Windows
A plain allow and block list rather than a stream of pop-ups Internal block list aimed at Windows telemetry	Prompts when unknown programs try to connect out One-click switching between filtering modes
The project itself says it is for advanced users Not a Windows Firewall interface; it uses a separate rule system	Windows only Medium filtering needs rules for every program you use
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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