sabre/dav

The open source CardDAV, CalDAV and WebDAV server

sabre/dav is an open-source server that implements the CardDAV, CalDAV, and WebDAV protocols. It solves the problem of providing a self-hosted, standards-based backend for syncing contacts, calendars, and files across devices and applications, without relying on third-party cloud services.

The server is designed to be scalable and includes extensive sharing and delegation features, allowing users to share calendars and address books with others and delegate permissions. It also offers powerful scheduling and free/busy capabilities for managing events and availability. A flexible ACL and authentication system provides granular access control. sabre/dav is supported on all major platforms and is built on a suite of PHP libraries, including sabre/http, sabre/vobject, sabre/event, sabre/xml, and sabre/uri.

sabre/dav is intended for developers and organizations that need to integrate CalDAV, CardDAV, or WebDAV functionality into their own infrastructure. As an open-source project, it is available for free download and self-installation. Enterprise support, customization, and integration services are available from fruux, the project's developer, for both on-premise and SaaS deployments.

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