Radicale
Free and Open-Source CalDAV and CardDAV Server·radicale.org
Radicale is a small but powerful CalDAV (calendars, to-do lists) and CardDAV (contacts) server that shares calendars and contact lists through CalDAV, CardDAV, and HTTP. It supports events, to-dos, journal entries, and business cards, works out-of-the-box with no complicated setup, and offers flexible authentication and authorization options with TLS security. It stores all data on the file system in a simple folder structure, works with many CalDAV and CardDAV clients, and can be extended with plugins. It is free software licensed under GPLv3.
What it's for
Features 13
- Access control via authorization/rights configuration
- Can be run as a systemd service or Windows service (via NSSM)
- Can run behind a reverse proxy (nginx, Caddy, Apache)
- Compatible with many CalDAV and CardDAV clients
- Configurable limits on connections, file size and login attempt rate
- Extensible via plugins (authentication, rights, storage, web plugins)
- Flexible authentication options (htpasswd, denyall, etc.)
- Secures connections with TLS
- Shares calendars and contact lists via CalDAV, CardDAV and HTTP
- Stores data on the file system in a simple folder structure
- Supports events, to-do lists, journal entries and business cards
- Supports versioning of collections with Git
- Works out-of-the-box with minimal configuration
Pricing
Radicale is free, open-source software; no paid plans are listed.
Fully free, open-source server software with no paid tiers stated.