Self-hosting

Your server. Your rules.

Run calternal on a home server, a VPS or your company's cluster. It is free for up to 6 active users, and it never calls home.

Read the docs View the source

  • One container

    calternal ships as one container image with one data directory. Run it with Podman or Docker on any Linux server.

  • Free for up to 6 users

    The whole product, for you and your family or a small team, at no cost.

  • No phone-home

    Your instance never calls us. Not for updates, not for licences, not for analytics.

  • Your backups, your rules

    Everything is plain files in one directory, so your usual backup tool already knows how to back it up.

  • Clients everywhere

    The web app works on every device. CalDAV and the sync client plug calternal into the apps you already use.

  • Source you can read

    AGPL-3.0-only. Read it, build it, audit it.

Prefer not to run a server?

calternal.cloud runs the same software for you. Move to your own server whenever you like.

Start free trial Host it yourself