Kozea/Radicale

Health v2 · maintenance only

Adoption not part of the score

4931 stars · 521 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Radicale is a lightweight CalDAV and CardDAV server for sharing calendars, to-do lists, and contacts over HTTP. It stores data on the file system, requires minimal setup, and supports authentication, TLS, and plugins.

Use cases

• self-host a calendar server to sync events across devices
• share contact lists between phone and laptop via CardDAV
• sync to-do lists and journal entries with CalDAV clients
• serve calendars over HTTP with authentication and TLS
• store calendar and contact data in a simple file-based backend
• extend a groupware setup with a small CalDAV/CardDAV component

When to choose

• you want a simple, lightweight CalDAV/CardDAV server with minimal configuration
• you prefer file-based storage without a database dependency
• you need a free, GPLv3 self-hosted sync server compatible with many clients
• you want to extend server behavior with plugins

When to avoid

• you need a full groupware suite with email, webmail, or shared collaboration features
• you require advanced multi-user admin tooling or a web UI out of the box
• you need horizontal scaling with clustered storage

Facets

service · maturity stable

http-server auth security plugin-system self-hosted self-hosted developer-tools backend web-development python cross-platform self-hosted caldav carddav calendar-server contacts-server vcard icalendar sync linux

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markdown · JSON · MCP: product_card(name="Kozea/Radicale")