CalDAV (Calendaring Extensions to WebDAV) is an internet standard allowing clients to access scheduling or meeting information on a remote server. It uses iCalendar format for data. It lets multiple users in different locations share, search and synchronize calendar data.
Both CardDAV and CalDAV are extensions on the WebDAV standard. Web Distributed Authoring and Versioning (WebDAV) itself is an extension of the standard HTTP protocol. It’s a protocol that allows multiple clients (devices/computers/apps) to share a resource (file/addressbook/calendar/etc).
The CalDAV protocol is a calendar sharing protocol. Just like CardDAV it was originally proposed as standard by Apple, RFC 6638. It uses WebDAV to share appointment data in the iCalendar-format. The “Internet Calendaring and Scheduling Core Object Specification” is an open standard itself, RFC 5545, that is widely supported. CalDAV allows multiple devices and apps to access your calendar, allowing cooperative planning and information sharing.
This article recommends the best CalDAV servers. We only include free and open source software here. The chart below captures our verdict. Note that there are a variety of other applications that include a CalDAV server. They are deliberately not included here. Other software that includes CalDAV functionality include Nextcloud, SOGo, Kopano, and Horde.
Learn more about the CalDAV servers. Click the links in the table below to learn more about each server.
| CalDAV Servers | |
|---|---|
| sabre/dav | Mature PHP framework for building WebDAV, CalDAV and CardDAV servers |
| Radicale | Lightweight CalDAV and CardDAV server that's simple to deploy |
| Davis | Modern CalDAV, CardDAV and WebDAV server with an admin interface |
| Baïkal | Lightweight CalDAV and CardDAV server with a web admin interface |
| Xandikos | Git-backed CalDAV and CardDAV server with scheduling support |
| DAViCal | PostgreSQL-backed CalDAV server focused on standards interoperability |
This article has been updated to reflect the changes outlined in our recent announcement.
 LinuxLinks helps you discover the best free and open source software for Linux. Explore our extensive collection of recommended applications, including alternatives to popular proprietary software.We also publish software reviews, Linux tutorials, hardware reviews, free programming books and articles covering the wider open source community. Browse our Linux resources to discover more. Know a useful free and open source Linux application we haven't covered? Suggest a program for inclusion. Has your software been featured on LinuxLinks? Display one of our Featured on LinuxLinks badges on your website or GitHub README. |
Please read our Comment Policy before commenting.