Compare software

LuLu vs Little Snitch: catalog facts
LuLu	Little Snitch
Free The open-source software is available without a license fee. Hosting, hardware and…	Paid A one-time purchase is required after the demo period.
macOS	macOS
Provides an open-source firewall interface for network access decisions.	Per-application outbound rules with a clear prompt at the moment of connection Network monitor shows exactly which process is talking to where
Blocking the wrong connection can interrupt an application's features.	One-time paid licence, macOS only The initial flood of prompts takes patience to train
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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