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DAViCal vs Radicale: catalog facts
DAViCal	Radicale
Free Free software under the GNU General Public License.	Free Free to run on your own server.
Linux, Self-hosted	Self-hosted
Calendar delegation and shared access between users Free/busy scheduling for meetings	Standard CalDAV and CardDAV support Small and light enough for modest hardware
Requires PostgreSQL and a PHP web server Setup is more involved than lighter CalDAV servers	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-2.0	License not stated
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 September 24, 2026

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