# Baïkal

> Baïkal is a free, open-source app you can self-host in the groupware & calendars category. Lightweight CalDAV and CardDAV server based on sabre/dav. It has 3,328 GitHub stars, is released under the GPL-3.0 license. It is a self-hosted alternative to Google Calendar.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/sabre-io/Baikal |
| Website | https://sabre.io/baikal/ |
| GitHub stars | 3,328 |
| Forks | 320 |
| Open issues | 110 |
| License | GPL-3.0 |
| License type | Open source |
| Language | PHP |
| Docker image | No |
| Platforms | PHP |
| Categories | Groupware & Calendars |
| Commits, last 12 months | 28 |
| Last commit | Aug 13, 2026 |
| Latest release | 0.12.1 (Aug 5, 2026) |
| Created | Feb 27, 2012 |
| Maintenance | Actively maintained |
| Archived | No |

## Install

Baïkal installs natively; follow the README at https://github.com/sabre-io/Baikal.

Need it installed for you? [appsgit installation help](https://appsgit.com/services/install): a fixed quote by email, single app installs from $79.

## Baïkal replaces

- [Google Calendar alternatives](https://appsgit.com/alternatives/google-calendar): Google's online calendar with sharing and event invites.

## Similar apps in Groupware & Calendars

- [Nextcloud](https://appsgit.com/apps/nextcloud): Access and share your files, calendars, contacts, mail and more from any device, on your terms. (37,003 stars, AGPL-3.0, PHP)
- [Seafile](https://appsgit.com/apps/seafile): File hosting and sharing solution primary for teams and organizations. (15,307 stars, GPL-2.0, C)
- [Colanode](https://appsgit.com/apps/colanode): Collaboration suite with real-time messaging, rich text pages, file management, and dynamic databases - built for offline work (alternative to Slack, Notion). (5,158 stars, Apache-2.0, TypeScript, Docker)
- [Radicale](https://appsgit.com/apps/radicale): Simple calendar and contact server with extremely low administrative overhead. (5,087 stars, GPL-3.0, Python)
- [SOGo](https://appsgit.com/apps/sogo): SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface. (2,171 stars, GPL-2.0, Objective-C)
- [Sync-in](https://appsgit.com/apps/sync-in): File storage, syncing, sharing, and collaboration with real-time editing, permission management, and desktop/CLI clients. (1,789 stars, AGPL-3.0, TypeScript, Docker)
- [SabreDAV](https://appsgit.com/apps/sabredav): Open source CardDAV, CalDAV, and WebDAV framework and server. (1,725 stars, BSD-3-Clause, PHP)
- [Keeper.sh](https://appsgit.com/apps/keeper-sh): 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. (1,376 stars, AGPL-3.0, TypeScript, Docker)

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Canonical page: https://appsgit.com/apps/baikal
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