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Nextcloud Calendar vs Xandikos: catalog facts
Nextcloud Calendar	Xandikos
Free Free app for Nextcloud servers.	Free Free and open source under the GPL-3.0 licence.
Web, Self-hosted	Linux, Self-hosted
Calendars stay on your own server CalDAV sync with standard clients	Git-backed storage with change history Broad, documented standards coverage
Requires a running Nextcloud server Not a standalone app	No built-in web interface for managing calendars WebDAV LOCK operations not implemented
Self-hosted	Self-hosted
Open source	Open source
License not stated	License: GPL-3.0
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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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