Radicale
Simple calendar and contact server with extremely low administrative overhead.
Actively maintained with regular releases.
Commit activity more than 85% of tracked projects; popularity more than 66%. How this is calculated.
Commits, last 11 months
| Stars | 5.1k |
|---|---|
| Latest release | v3.8.1 · 24 Sept 2026 |
| Repo updated | 24 Sept 2026 |
| Licence | GPL-3.0 |
| Built with | Python, deb |
Is Radicale actively maintained?
Radicale is under active development: 1381 commits landed over the last 11 months, averaging roughly 81 commits a month in the most recent quarter.
Activity is cooling: commits are down 67% against the previous quarter. One slow quarter is normal; two in a row is a signal.
The most recent tagged release, v3.8.1, shipped within the last month — a current, installable version exists today.
Among the 10 calendar & contacts projects we track, Radicale currently has the highest health score.
What Radicale actually does
Radicale is a lightweight, self-hosted server designed to store and synchronise calendars and contact lists. It allows you to manage schedules and address books across multiple devices using standard protocols like CalDAV and CardDAV. The project is implemented in Python and focuses on minimal resource usage and straightforward administration.
Best fit: This tool is a practical fit for individuals or small teams who want to host their own calendar and contact data without the complexity of heavy groupware suites.
Worth knowing: It lacks an integrated graphical user interface for managing accounts and permissions, meaning you will need to handle user configuration directly on the server or via command-line utilities.
Deployment notes
As a Python application packaged for Debian-based systems, you will typically run it behind a reverse proxy to handle TLS termination and ensure persistent storage is mapped for your data directory.
Links
Alternatives to Radicale
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