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BaïkalDAViCal
Free

Free and open source under the GPL v3.

 Free

Free software under the GNU General Public License.

Self-hosted Linux, Self-hosted
  • Runs on any basic PHP host
  • Web interface for users, calendars and address books
  • Calendar delegation and shared access between users
  • Free/busy scheduling for meetings
  • No built-in calendar or contacts web client for end users
  • Docker installation is only unofficial
  • Requires PostgreSQL and a PHP web server
  • Setup is more involved than lighter CalDAV servers
Self-hosted Self-hosted
Open source Open source
License: GPL-3.0 License: GPL-2.0
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked October 2, 2026

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