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Baïkal vs Radicale: catalog facts
Baïkal	Radicale
Free Free and open source under the GPL v3.	Free Free to run on your own server.
Self-hosted	Self-hosted
Runs on any basic PHP host Web interface for users, calendars and address books	Standard CalDAV and CardDAV support Small and light enough for modest hardware
No built-in calendar or contacts web client for end users Docker installation is only unofficial	You set up and maintain the server yourself Only handles calendars and contacts, not mail or files
Self-hosted	Self-hosted
Open source	Open source
License: GPL-3.0	License not stated
No 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 24, 2026	Official website Full listing and sources Checked September 24, 2026

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