Lightweight CalDAV+CardDAV server


Your Calendars and Contacts

Baïkal offers ubiquitous and synchronized access to your calendars and address books over CalDAV and CardDAV. Baïkal implements the current IETF recommendation drafts of these industry standards for centralized calendar and address book collections.

Calendars with CalDAV Contact cards with CardDAV

Apple logo Mozilla Thunderbird logo Android logo

Compatible with your existing applications

Baïkal is compatible with iOS’ (iPad, iPhone, and iPod) and Mac OS X’s Calendar, Contacts, and Reminders apps; Android’s calendars and contacts apps like DAVdroid; Evolution for Linux; Mozilla Thunderbird with Lightning; Atmail; eM Client for Windows; and every other CalDAV and CardDAV capable application.

Effortless administration

Baïkal include a sleek and extensive graphical web administration interface to simplify administrative tasks such as user, calendar and address book collection management, and system settings. The dashboard provides a neat overview over the running system and key data.

A screenshot of Baïkal

A magic wand

2-clicks installation

Baïkal provides a flat package with an automatic installation tool. Extract the downloaded archive, deploy it over FTP to the server, and it is ready to go. No cumbersome tweaking of configuration files required.


Baïkal’s less than 2MB codebase runs on PHP 5.3 and newer. User data is stored in an SQLite database. MySQL is also fully supported. No matter how modest your hosting and resources might be, Baïkal will get the job done.

A feather, symbolizing the lightness of Baïkal

Open source initiative logo

Free and open source

Baïkal is “free” as in “free beer”. You can use it freely, without time restrictions. The source code is public, and available to everyone. You can modify, review, and contribute to Baïkal’s development. Baïkal is based on other great open source projects like SabreDAV, Twig, and Twitter Bootstrap to ensure top quality.

Baïkal is released under the GNU GPL v3 license, which is approved by the Open Source Initiative.

Get Baïkal

Current version: 0.2.7


Flat package

Easy installation.

Install via FTP.
Download this package if you want Baïkal up and running quickly, or if you have limited access to the host server.


Regular package

For experienced users.

Install via SSH.
Download this package if you want to install Baïkal and have shell access (SSH) to the host server.



For developpers.

Install via SSH+Git.
Freshly drawn straight from the development repository. Not suitable in a production environment.

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Baïkal is developped by Net Gusto, the Symfony experts.

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