Server implementation
supported development
Apple Contacts Server
Commercial macOS Server, also Open source/cross-platform
Implementation of CardDAV. Available as part of the macOS Server software. Also open source. Python-based.
Baïkal
Open Source
Baïkal is an open-source, lightweight PHP+SQLite CALDAV+CARDDAV server based on SabreDAV.
Bedework
Open source/cross-platform
Implementation of CardDAV. Java-based.
DAVical
Open Source/PHP/PostgreSQL
Implementation of CalDAV Access and Scheduling with web-based administration and CardDAV support.
EGroupWare
Free trial period
EGroupware is an enterprise ready groupware server that is adding CardDAV support.
EVO Mail Server
Shareware/Trial Period
CalDAV and CardDAV support.
IT Hit Active Directory CardDAV Server
Commercial License
Enables storage of custom attributes in Active Directory, such as instant messengers, birth dates, multiple addresses, etc. without modifying Active Directory schema and a two-way synchronization of Active Directory contacts via CardDAV protocol.
Kerio Connect
Unified messaging server
Implementation of CardDAV. Available as part of the Kerio Connect server software.
Meishi
Open source / Cross platform
Meishi is a Rails 3 based standalone CardDAV server. It’s designed to be lightweight and simple to configure. Meishi provides both a CardDAV and a simple browser based interface.
messageconcept PeopleSync
Commercial Windows Server
Enterprise CardDAV server with sync agents for Active Directory, Exchange Server, SharePoint, SQL databases, CRM systems etc.
OX App Suite
Open Source/Commercial/Cross Platform
The number one open cloud service platform that provides open standard interfaces such as CalDAV/CardDAV/WebDAV/IMAP/PGP/… to all it services such as unified email, calendar, cloud storage, security, collaboration and much more.
ownCloud
Open Source
ownCloud is an open source, simple cloud server, providing WebDAV, CalDAV, CardDAV, etc. It’s written in PHP and can use SQLite or MySQL databases. So it runs under Windows, Linux, etc.
Radicale
Open source / Cross platform
Radcale is an open source cross-platform CalDAV and CardDAV server written in Python. It requires few software dependencies and is pre-configured to work out-of-the-box.
sabre/dav
Open Source
SabreDAV is a free WebDAV server and includes support for CardDAV.
ScalableOGo
Open Source
ScalableOGo (SOGo) is a free groupware server and includes support for CardDAV.
Xandikos
Open source/cross-platform
Xandikos is a lightweight free WebDAV server that includes support for CardDAV.