Comparison of CalDAV and CardDAV implementations

A comparison of CalDAV and CardDAV implementations offers two overviews of client and server computer software implementations of the CalDAV and CardDAV protocols.

Client implementations

Client name	Platform	License	WebDAV ACL editor	Discovery of other user’s collections	ICalendar events	ICalendar tasks	ICalendar journals	ICalendar VAVAILABILITY (RFC 7953)	CalDAV Scheduling	CardDAV	vCard Synchronization	User interface	Online store	.well-known URLs	FBURL	DNS SRV	handles home-sets
AgenDAV[1]	Cross-platform JavaScript Web browser	GNU GPL	Yes limited	No	Yes	—	Un­known	No	No Does not arrange meetings with participants	—	Out of scope	AgenDAV's fullcalendar.io	No	No The used server is fixed in the configuration file	No Does not arrange meetings with participants	No the caldav-server settings need to be fixed in AgenDAV's configuration file	Yes
Cadaver[2]	Command-line	GNU GPL	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
aCal[3]	Android	GNU GPL	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Un­known	—	Un­known	aCal	aCal	Un­known	Un­known	Un­known	Un­known
AndroidCaldavSyncAdapater[4]	Android	GNU GPL	Un­known	Un­known	Yes	—	Un­known	Un­known	Un­known	—	Out of scope	Android	Google Play	Un­known	Out of scope	Un­known	Un­known
CalDavZAP[5]	Cross-platform JavaScript Web browser	AGPL	No	No	Yes	Yes	Un­known	No	No Does not arrange meetings with participants	—	Out of scope	CalDavZAP	No	No The used server is fixed in the configuration file	No Does not arrange meetings with participants	No The used server is fixed in the configuration file	Yes
CardDavMATE[6]	Cross-platform JavaScript Web browser	AGPL	No	No	Out of scope	Out of scope	Out of scope	Out of scope	Out of scope	Yes vCard 3.0 only	No	CardDavMATE	No	No The used server is fixed in the configuration file	Out of scope	No The used server is fixed in the configuration file	Yes
InfCloud (CalDavZAP+CardDavMATE)[7]	Cross-platform JavaScript Web browser	AGPL	No	No	Yes	Yes	Un­known	No	No Does not arrange meetings with participants	Yes vCard 3.0 only	No	InfCloud	No	No The used server is fixed in the configuration file	No Does not arrange meetings with participants	No The used server is fixed in the configuration file	Yes
Chandler Desktop[8]	Cross-platform Python	Apache	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Un­known	No	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
DAVx⁵[9]	Android	GNU GPL	No	No	Yes	Yes	Yes	Out of scope	No (except attendees/invitations)	Yes	No (server always wins)	Android, OpenTasks	Google Play, OpenTasks	Yes	Out of scope	Yes	Yes
Tasks.org[10]	Android	GNU GPL	No	No	No	Yes	No	No	No	No	No	Android	Google Play	Yes	No	No	Yes
jqCalDAV[11]	Cross-platform JavaScript Web browser	MIT	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Un­known	—	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
KCardDAV[12] (discontinued)	Cross-platform Kontact add-on	GNU GPL	Un­known	Un­known	—	—	—	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
KOrganizer, KAddressBook, Kontact	Unix-KDE	GNU GPL	Un­known	Un­known	Yes	Yes	Yes	Un­known	Un­known	Yes	Un­known	KOrganizer KAddressbook	KOrganizer KAddressbook	Un­known	Un­known	Un­known	Un­known
Lightning[13]	Cross-platform Thunderbird Add-on	MPL, GPL, LGPL	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Un­known	—	Out of scope	Lightning	Lightning	Un­known	Un­known	Un­known	Un­known probably not
CardBook[14]	Cross-platform Thunderbird Add-on	MPL	No	No	Out of scope	Out of scope	Out of scope	Out of scope	Out of scope	Yes vCard 3.0 and vCard 4.0	Yes	CardBook	Mozilla Add-ons (ATN)	Yes	Out of scope	No	Partial
MineTime[15]	Cross-platform	Proprietary	No	No	Yes	No	No	No	No	No	No	No	MineTime	minetime.ai	No	No	No
Mulberry[16]	Cross-platform	Apache	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
Outlook CalDav Synchronizer[17]	Windows	AGPL	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Un­known	Yes	Un­known	Outlook	Un­known	Yes	Un­known	Yes	Yes
pyCardDAV[18]	Cross-platform Python	MIT	Un­known	Un­known	—	—	—	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
The Bat![19]	Windows	Proprietary	Un­known	Un­known	No	No	No	Un­known	Un­known	Yes	Un­known	The Bat!	The Bat!'s address book	Un­known	Un­known	Un­known	Un­known
Inverse SOGo Connector-Integrator[20]	Cross-platform Thunderbird Add-on	MPL, GPL, LGPL	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Un­known	Yes	Un­known	Mozilla	Mozilla Add-ons	Un­known	Un­known	Un­known	Un­known
Evolution	Cross-platform	GNU GPL	No	No	Yes	Yes	Yes	No	No	Yes vCard 3.0 only	Un­known	Evolution	Evolution	Yes	Yes if the URL does not require authentication	Yes	Yes
ReminderFox[21]	Cross-platform Firefox	MPL 1.1	Un­known	Un­known	Yes	Yes	Un­known	Un­known	No	—	Un­known	ReminderFox	Yes	Un­known	Un­known	Un­known	Un­known

There are more clients, mentioned for completeness:

• For the command line: Vdirsyncer (for WebDAV) + Khal (for calendaring) or + Khard (for contacts)
• Apple's iCal and Calendar
• For Windows and Mac eM Client
• Windows built in-support (kind of)
• For the Web: Kronolith
• For Android: CalDAV Sync, CardDAV Sync, iCal Import/Export CalDAV

Server implementations

Server name	License	Programming language	RFC 2616 HTTP/1.1	RFC 2617 HTTP auth.	RFC 2518 Web­DAV	RFC 3253 Web­DAV vers.	RFC 3744 Web­DAV ACL	RFC 4324 iCal CAP	RFC 4331 Web­DAV quota	RFC 4709 Web­DAV mount	RFC 4791 Cal­DAV	RFC 4918 Web­DAV ext.	RFC 5397 Web­DAV current principal	RFC 5545 rev. iCal (Availability Check)	RFC 5546 iCal iTIP(Group Scheduling)	RFC 5689 Web­DAV ext. MKCOL	RFC 5995 Web­DAV POST add member	RFC 6352 Card­DAV vCard	RFC 6578 Web­DAV sync	RFC 6638 Cal­DAV sched.(Auto-Schedule)	RFC 7529 iCal RSCALE	RFC 7540 HTTP/2	RFC 7809 Cal­DAV time zones by ref.	RFC 7953 iCal VAVAIL­ABILITY	Free-busy URL
Baïkal[22][23]	GNU GPL	PHP	Yes [Note 1]	Yes	Yes	No	Some	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	Un­known	Yes [Note 1]	Un­known	Un­known	Yes
Bedework[24]	Apache	Java	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Yes	Yes	Un­known	Un­known	Yes	Yes	Yes	Un­known	Un­known	Un­known	Un­known	Un­known
Calendar and Contacts Server[25]	Apache	Python	Yes	Yes	Yes	Yes	Yes	No	Un­known	No	Yes	Yes	Yes	Yes	Yes	Yes	Un­known	Yes	Yes	Yes	Un­known	Un­known	Un­known	Un­known	Un­known
Calypso[26]	GNU GPL	Python	Yes	Yes	Yes	No	Un­known	No	Un­known	No	Yes	Yes	No	Yes	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
Cyrus IMAP[27]	BSD	C	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
DAViCal[28][29]	GNU GPL	PHP	Yes [Note 1]	Yes	Yes	Yes	Yes	Yes	Un­known	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Un­known	Yes [Note 1]	Un­known	Yes	Yes
DavMail[30]	GNU GPL	Java	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
Fennel[31]	GNU GPLv3	JavaScript	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
Group-Office[32]	AGPL, proprietary	PHP	Yes [Note 1]	Yes	Yes	Un­known	Some	Un­known	Un­known	Yes	Yes	Yes	Yes	Yes	Un­known	Yes	Un­known	Yes	Un­known	Un­known	Un­known	Yes [Note 1]	Un­known	Un­known	Un­known
Horde Groupware	GNU LGPL	PHP	Yes [Note 1]	Yes	Yes	No	Some	No	No	Un­known	Yes	Yes	Yes	Yes	Yes	No	No	Yes	No	No	No	Yes [Note 1]	No	No	No
Nextcloud[33]	AGPL v3	PHP	Yes [Note 1]	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Yes [Note 1]	Un­known	Un­known	Un­known
Open Xchange	GNU GPL, CC	Java, JavaScript	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
ownCloud[34]	AGPL v3	PHP	Yes [Note 1]	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Yes	Un­known	Un­known	Un­known	Yes [Note 1]	Un­known	Un­known	Un­known
Radicale[35]	GNU GPL	Python	Yes	Yes	Some	No	Some	No	No	No	Some	Some	Some	No	Some	No	No	Some	Yes	No	No	Yes [Note 1]	No	No	No
SabreDAV[36]	BSD	PHP	Yes [Note 1]	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Un­known	Yes [Note 1]	Un­known	Yes	Un­known
SOGo[37]	GNU GPL	Objective-C	Yes	Yes	Un­known	Un­known	Some[38][39]	Un­known	Un­known	Un­known	Some[40][41]	Un­known	Un­known	Some[42][43][44][45]	Un­known	Un­known	Un­known	Un­known	Some[46]	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
Xandikos[47]	GNU GPL	Python	Yes	Yes	Yes	Some	Some	No	No	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	No	Un­known	Yes	No	No	Un­known
Zarafa	AGPL, proprietary	PHP	Yes [Note 1]	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Read only	Un­known	Un­known	Un­known	Yes [Note 1]	Un­known	Un­known	Un­known
Zentyal[48]	GNU GPL	Perl	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known	Un­known
Meishi[49]	BSD	Ruby	Yes	Yes'basic'	Someyes	Someno	Yesmuch of	No	Un­known	No	No	Un­known	Yes	No	No	No	Un­known	Some	Un­known	No	No	Un­known	No	No	Un­known
Zimbra	GNU GPL	Java	Yes	Yes	Yes	Yes	Yes	No	Un­known	No	Yes	Un­known	Yes	Yes	Yes	Yes	Un­known	Yes	Un­known	Yes	Un­known	Un­known	Un­known	Un­known	Un­known

1. PHP-based servers rely on the underlying web server platform for the implementation of HTTP.

The table is missing Kopano, Kerio Connect and Scalix, which are mentioned here for completeness.

See also

• CalDAV
• CardDAV