Radicale: Simple CalDAV and CardDAV server
Radicale is a self-hosted calendar and contacts tool. Simple CalDAV and CardDAV server.
Why self-host Radicale
When you deploy Radicale yourself, you own the instance. That means no rate limits, no pricing changes, and no worry about the service shutting down.
What it does
Radicale falls into the Calendar, Contacts category of self-hosted software. It is designed to be deployed on your own infrastructure, whether that is a home server, a VPS, or a local machine running Docker.
Community traction
The project has 3k stars on GitHub, which is a reasonable proxy for how widely it is used. Active repositories tend to ship bug fixes faster and have better documentation than projects that stall after the initial release.
Deployment
Docker is the most common deployment path. If you are already running containers at home, adding Radicale to a compose file is a low-friction way to try it.
Alternatives
If Radicale does not fit your needs, common alternatives include Google Calendar, Google Contacts. The self-hosted versions of these tools often differ in resource requirements and feature focus, so it is worth testing the one that matches your workload.
Maturity
The current release is 3.2.2-version. The project has moved past early development and tends to ship stable, documented releases.
License
It is licensed under GPL-3.0, making it freely available for personal and commercial use.
Links
For anyone already running a home server, Radicale is a natural addition. It handles calendar and contacts without requiring a paid subscription or an account with a third party.