CalDAV & CardDAV

CalDAV and CardDAV are open standards for synchronising calendars and contacts across devices and applications. They are supported by virtually every calendar and contact application, from Thunderbird to iOS to Android, making them the foundation of vendor-neutral groupware.

Why open standards matter

Proprietary groupware locks your calendar and contact data into a single vendor’s ecosystem. CalDAV and CardDAV free you from that. Your data syncs across any client that supports the standards, and you can switch servers or clients without losing anything. No vendor lock-in, no format conversion headaches.

Self-hosted groupware

Combined with a CalDAV/CardDAV server like Radicale, Baïkal, or Nextcloud, you get shared calendars, address books, and scheduling, all running on your own infrastructure. It integrates seamlessly with Thunderbird on the desktop and native calendar apps on mobile devices.

Our expertise

We help companies replace proprietary groupware with standards-based alternatives. We advise on server selection, client integration, and how to build a calendar and contact infrastructure that works reliably across your organisation.