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Little Snitch vs GlassWire: catalog facts
Little Snitch	GlassWire
Paid A one-time purchase is required after the demo period.	Freemium A free version is available. Longer history and extra features require a paid licence.
macOS	Windows, Android
Per-application outbound rules with a clear prompt at the moment of connection Network monitor shows exactly which process is talking to where	Visual history makes it obvious which application started talking and when Alerts on first connections and on changes to system network settings
One-time paid licence, macOS only The initial flood of prompts takes patience to train	Longer history retention and several features need a paid licence Windows and Android only, closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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.