Self-hosted CalDAV servers replace Google Calendar for people and teams who want their schedule under their own control. Baikal and Radicale are the two most deployed options; DAVIS adds a web interface on top.
Open source alternatives to Google Calendar
Self-hosted CalDAV servers replace Google Calendar for people and teams who want their schedule under their own control. Baikal and Radicale…
Compare
| Program | License | Self-hosted | Last release | Activity |
|---|---|---|---|---|
| Baïkal | GPL-3.0 | Yes | Oct 19, 2026 | Nov 2026 |
| Radicale | GPL-3.0 | Yes | Oct 25, 2026 | Nov 2026 |
| Davis | MIT | Yes | Oct 30, 2026 | Oct 2026 |
| SabreDAV | — | Yes | — | — |
| Xandikos | GPL-3.0 | Yes | Oct 17, 2026 | Nov 2026 |
Baïkal
v0.13.0
★ 3,366
Radicale
v3.9.0
★ 5,185
Davis
Self-hosted DAV server with web admin for calendars and contacts
v5.6.3
★ 763
SabreDAV
Xandikos
Git-backed CardDAV/CalDAV server for self-hosted contacts and calendars
v0.4.10
★ 612
Davis
Self-hosted DAV server with web admin for calendars and contacts
v5.6.3
★ 763
SabreDAV
Xandikos
Git-backed CardDAV/CalDAV server for self-hosted contacts and calendars
v0.4.10
★ 612
How to choose
Compare the options on what matters for your case: the license (if you run a business, check commercial use), the platforms you already operate, and how actively each project releases. Every program above links to its official project page, release notes and source code.
Questions
Do calendar apps work with these?
Any CalDAV client — Apple Calendar, Thunderbird, DAVx⁵ on Android — connects directly.