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Baïkal

The iCloud, Google Contacts and Fruux alternative

Baïkal is a CalDAV and CardDAV server: one private address that syncs your calendars and contacts to the phone, laptop, and tablet apps you already use. It is an alternative to iCloud and Google Contacts built on the same open standards, so Apple Calendar, Thunderbird, and DAVx5 connect natively with no bridge or plugin. Your address book is a map of everyone you know, and running it on your own infrastructure keeps that map private.

  • calendar
  • contacts
  • caldav
  • carddav
  • sync
  • address-book
  • icloud
  • google-contacts

Screenshots

Manage users, address books and calendars from the admin dashboard
Every user gets their own calendars and address books, synced to all their devices

Frequently asked

How much does it cost to host Baïkal?
Hosting Baïkal on Zenith is $5 / month, billed monthly until you cancel.
How long does Baïkal take to deploy?
Most apps are live on your own subdomain in about two minutes after you deploy.
Do I need to manage a server to run Baïkal?
No. Zenith runs Baïkal for you, with no servers to provision or maintain.
Can I use my own domain with Baïkal?
Yes. Each deployment gets a Zenith subdomain, and you can map your own custom domain to it afterwards.
Can I deploy Baïkal with Claude or another AI agent?
Yes. Zenith has a Model Context Protocol (MCP) server at https://zenith.hosting/mcp, so you can deploy and manage Baïkal straight from Claude, Cursor, or any MCP client. Add the endpoint, approve the one-click connection, and ask your agent to deploy. Setup is at https://zenith.hosting/connect.

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