Baïkal
Lightweight CalDAV and CardDAV server based on sabre/dav.
Maintained, but at a slower pace than the leaders in its category.
Commit activity more than 14% of tracked projects; popularity more than 59%. How this is calculated.
Commits, last 11 months
| Stars | 3.3k |
|---|---|
| Latest release | 0.12.1 · 5 Aug 2026 |
| Repo updated | 13 Aug 2026 |
| Licence | GPL-3.0 |
| Built with | PHP |
Is Baïkal actively maintained?
Development is ongoing. The repository recorded 28 commits over the same window, and the last three months alone account for 13 of them.
Activity is accelerating: the last quarter carried 333% more commits than the one before it.
The most recent tagged release, 0.12.1, shipped about two months ago — a current, installable version exists today.
Baïkal ranks #7 of 10 tracked calendar & contacts projects. Several better-maintained options exist in the same category — they are listed below.
What Baïkal actually does
Baïkal provides a lightweight server for hosting calendars, reminders, and contacts. It uses the CalDAV and CardDAV protocols to synchronise schedule and address book data across multiple devices. The project is built using PHP and relies on the sabre/dav library.
Best fit: It suits users who want a dedicated, low-resource self-hosted solution specifically for calendar and contact synchronisation without the overhead of a full groupware suite.
Worth knowing: The project has modest development activity and a relatively low maintenance score, meaning you may encounter slower responses to bugs or compatibility updates.
Deployment notes
Because it is a PHP application, you will typically need to configure a web server like Nginx or Apache with a PHP-FPM runtime, along with a database such as MySQL or SQLite for persistent storage.
Links
Alternatives to Baïkal
Projects in the same categories, ordered by health score.
Simple calendar and contact server with extremely low administrative overhead.
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Calendar syncing tool that pulls and pushes events between calendar sources and destinations via iCal/ICS or OAuth, with support for anonymized busy/free events.
Open source CardDAV and CalDAV server with minimal administrative overhead, backed by a Git repository.
POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client with an Exchange server, even from the internet or behind a firewall through Outlook Web Access.
Manage my Damn Life (MMDL) is a self-hosted front end for managing your CalDAV tasks and calendars.