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Baïkal vs Nextcloud Calendar: catalog facts
Baïkal	Nextcloud Calendar
Free Free and open source under the GPL v3.	Free Free app for Nextcloud servers.
Self-hosted	Web, Self-hosted
Runs on any basic PHP host Web interface for users, calendars and address books	Calendars stay on your own server CalDAV sync with standard clients
No built-in calendar or contacts web client for end users Docker installation is only unofficial	Requires a running Nextcloud server Not a standalone app
Self-hosted	Self-hosted
Open source	Open source
License: GPL-3.0	License not stated
No account needed	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 October 2, 2026

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