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DAViCal vs Xandikos: catalog facts
DAViCal	Xandikos
Free Free software under the GNU General Public License.	Free Free and open source under the GPL-3.0 licence.
Linux, Self-hosted	Linux, Self-hosted
Calendar delegation and shared access between users Free/busy scheduling for meetings	Git-backed storage with change history Broad, documented standards coverage
Requires PostgreSQL and a PHP web server Setup is more involved than lighter CalDAV servers	No built-in web interface for managing calendars WebDAV LOCK operations not implemented
Self-hosted	Self-hosted
Open source	Open source
License: GPL-2.0	License: GPL-3.0
Not stated if an account is 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.