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