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Murus vs LuLu: catalog facts
Murus	LuLu
Freemium Offered in three versions at different levels; see the website for current prices.	Free The open-source software is available without a license fee. Hosting, hardware and…
macOS	macOS
Uses the PF firewall already built into macOS Port knocking, adaptive firewall and NAT	Provides an open-source firewall interface for network access decisions.
macOS only Works at the network layer; per-app control needs the separate Vallum app	Blocking the wrong connection can interrupt an application's features.
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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