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LuLu vs simplewall: catalog facts
LuLu	simplewall
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the GPL 3.0.
macOS	Windows
Provides an open-source firewall interface for network access decisions.	A plain allow and block list rather than a stream of pop-ups Internal block list aimed at Windows telemetry
Blocking the wrong connection can interrupt an application's features.	The project itself says it is for advanced users Not a Windows Firewall interface; it uses a separate rule system
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	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 September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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