Radicale

A lightweight CalDAV (calendar) and CardDAV (contact) server that you can host yourself. Radicale uses file-based storage with no database required, making it extremely simple to deploy and maintain.

What You Can Do After Deployment

1. Visit your domain — access the built-in web interface to manage calendars and address books
2. Create calendars — set up personal and shared calendars through the web UI
3. Create address books — manage contacts in CardDAV format
4. Connect clients — point any CalDAV/CardDAV client to your Radicale URL
5. Share calendars — share calendars between users

Compatible Clients

• Apple Calendar and Contacts (macOS/iOS)
• Thunderbird with Lightning
• DAVx5 (Android)
• GNOME Calendar and Contacts
• Evolution
• Any standard CalDAV/CardDAV client

Key Features

• CalDAV support for calendars and to-do lists
• CardDAV support for contacts and address books
• Built-in web interface for management
• File-based storage — no database needed
• Multi-user with access control
• HTTPS support
• Works with all major calendar and contact clients
• Extremely lightweight and fast
• Git-based versioning for data (optional)

License

GPL-3.0 — GitHub | Website