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Caprine vs Ferdium: catalog facts
Caprine	Ferdium
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free and open source under Apache 2.0. Unlike Franz, the project states it does not…
Windows, macOS, Linux	Windows, macOS, Linux
It adds a dark theme, keyboard shortcuts, custom styles and privacy options such as hiding typing indicators and…	Hundreds of services supported, with workspaces to group them No paid account or usage restrictions, unlike the Franz it forked from
It is an unofficial wrapper around the Messenger web app, so Facebook changes can break it, and the…	Each service is a web view, so memory use grows quickly with many services Service integrations break when a provider changes its web app
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
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.