Radicale

Lightweight CalDAV server you run yourself.

radicale.org
FreeOpen SourceWindowsmacOSLinuxSelf-hosted
PricingFree and open source. You only pay for wherever you host it.

Radicale is a small CalDAV and CardDAV server you run on your own machine. Because you host it, there is no company in the middle reading your schedule and it works with every standard calendar app, from Apple Calendar to Thunderbird to DAVx5 on Android. Be clear on one thing: Radicale does not encrypt your events end-to-end. It stores them as plain .ics files on your server so privacy comes from you securing that server, not from the software hiding data from you. Best for technical users who want full ownership and standard sync and can run their own box.

Strengths

  • Standard CalDAV and CardDAV; works with any client
  • Tiny, open source, self-hosted
  • No provider in the middle

Considerations

  • No end-to-end encryption; you secure the server
  • Setup and upkeep are on you

Listed inCalendars

Radicale alternatives