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Windows Firewall Control vs simplewall: catalog facts
Windows Firewall Control	simplewall
Free Free to download and use.	Free Free and open source under the GPL 3.0.
Windows	Windows
Prompts when unknown programs try to connect out One-click switching between filtering modes	A plain allow and block list rather than a stream of pop-ups Internal block list aimed at Windows telemetry
Windows only Medium filtering needs rules for every program you use	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
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

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