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Messenger vs Caprine: catalog facts
Messenger	Caprine
Free Free to use with a Meta account.	Free The software is free under its open-source licence. Hosting, hardware and external…
Web	Windows, macOS, Linux
Reaches people who already use Facebook Messaging and video calls in one place	It adds a dark theme, keyboard shortcuts, custom styles and privacy options such as hiding typing indicators and…
Requires a Meta account Closed source and run by an advertising company	It is an unofficial wrapper around the Messenger web app, so Facebook changes can break it, and the…
Web application	Downloadable app
Closed source	Open source
License not stated	License: MIT
Account 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 23, 2026	Official website Full listing and sources Checked September 22, 2026

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