Comparison of CalDAV and CardDAV implementations explained

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		limited						Does not arrange meetings with participants		out of scope	AgenDAV's fullcalendar.io		The used server is fixed in the configuration file	Does not arrange meetings with participants	the caldav-server settings need to be fixed in AgenDAV's configuration file
	Cadaver[2]	Command-line
	aCal[3]	Android											aCal
	AndroidCaldavSyncAdapater[4]	Android										out of scope	Android			Out of scope
	CalDavZAP[5]	Cross-platform JavaScript Web browser								Does not arrange meetings with participants		out of scope	CalDavZAP		The used server is fixed in the configuration file	Does not arrange meetings with participants	The used server is fixed in the configuration file
	CardDavMATE[6]	Cross-platform JavaScript Web browser				out of scope	out of scope	out of scope	out of scope	out of scope	vCard 3.0 only		CardDavMATE		The used server is fixed in the configuration file	Out of scope	The used server is fixed in the configuration file
	InfCloud (CalDavZAP+CardDavMATE)[7]	Cross-platform JavaScript Web browser								Does not arrange meetings with participants	vCard 3.0 only		InfCloud		The used server is fixed in the configuration file	Does not arrange meetings with participants	The used server is fixed in the configuration file
	Chandler Desktop[8]	Cross-platform Python
	DAVx⁵[9]	Android							out of scope	(except attendees/invitations)		(server always wins)	Android, OpenTasks			out of scope
	Tasks.org[10]	Android											Android
	jqCalDAV[11]	Cross-platform JavaScript Web browser
	KCardDAV[12] (discontinued)	Cross-platform Kontact add-on
	KOrganizer, KAddressBook, Kontact	Unix-KDE											KOrganizer KAddressbook
	Lightning[13]	Cross-platform Thunderbird Add-on										Out of scope	Lightning					probably not
	CardBook[14]	Cross-platform Thunderbird Add-on				Out of scope	Out of scope	Out of scope	Out of scope	Out of scope	vCard 3.0 and vCard 4.0		CardBook	Mozilla Add-ons (ATN)		Out of scope		partial
	MineTime[15]	Cross-platform												MineTime	minetime.ai
	Mulberry[16]	Cross-platform
	Outlook CalDav Synchronizer[17]	Windows											Outlook
	pyCardDAV[18]	Cross-platform Python
	The Bat![19]	Windows											The Bat!
	Inverse SOGo Connector-Integrator[20]	Cross-platform Thunderbird Add-on											Mozilla
	Evolution	Cross-platform									vCard 3.0 only		Evolution			if the URL does not require authentication
	ReminderFox[21]	Cross-platform Firefox											ReminderFox

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	RFC 2518 Web­DAV	RFC 3253 Web­DAV	RFC 3744 Web­DAV ACL	RFC 4324 iCal	RFC 4331 Web­DAV quota	RFC 4709 Web­DAV mount	RFC 4791 Cal­DAV	RFC 4918 Web­DAV	RFC 5397 Web­DAV current principal	RFC 5545 iCal(Availability Check)	RFC 5546 iCal (Group Scheduling)	RFC 5689 Web­DAV MKCOL	RFC 5995 Web­DAV POST add member	RFC 6352 Card­DAV vCard	RFC 6578 Web­DAV	RFC 6638 Cal­DAV (Auto-Schedule)	RFC 7529 iCal	RFC 7540 HTTP/2	RFC 7809 Cal­DAV time zones by	RFC 7953 iCal	Free-busy URL
	Baïkal[22] [23]		PHP
	Bedework[24]		Java
	Calendar and Contacts Server[25]		Python
	Calypso[26]		Python
	Cyrus IMAP[27]		C
	DAViCal[28] [29]		PHP
	DavMail[30]		Java
	Fennel[31]		JavaScript
	Group-Office[32]		PHP
	Horde Groupware		PHP
	Nextcloud[33]		PHP
	Open Xchange	, CC	Java, JavaScript
	ownCloud[34]		PHP
	Radicale[35]		Python
	SabreDAV[36]		PHP
	SOGo[37]		Objective-C					[38] [39]				[40] [41]			[42] [43] [44] [45]					[46]
	Xandikos[47]		Python
	Zarafa		PHP																Read only
	Zentyal[48]		Perl
	Meishi[49]		Ruby		'basic'	yes	no	much of
	Zimbra		Java

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

See also

• CalDAV
• CardDAV

Notes and References

1. http://agendav.org/ AgenDAV project home
2. Web site: Cadaver home . 2015-03-11 . https://web.archive.org/web/20150312225036/http://www.webdav.org/cadaver/ . 2015-03-12 . dead .
3. Web site: Main Page - ACal Wiki . Wiki.acal.me . 2013-04-01 . 2015-12-23 . https://web.archive.org/web/20151224104635/http://wiki.acal.me/wiki/Main_Page . 2015-12-24 . dead .
4. Web site: gggard/AndroidCaldavSyncAdapater ¡ GitHub . Github.com . 2015-12-23.
5. http://www.inf-it.com/open-source/clients/caldavzap/ CalDavZAP
6. http://www.inf-it.com/open-source/clients/carddavmate/ CardDavMATE
7. http://www.inf-it.com/open-source/clients/infcloud/ InfCloud (integrated version of CalDavZAP and CardDavMATE)
8. http://chandlerproject.org/ Chandler Project
9. https://www.davx5.com/ DAVx⁵ website
10. https://tasks.org/ Tasks.org website
11. http://boxacle.net/jqcaldav/ jqCalDAV project home
12. http://code.google.com/p/kcarddav/ KCardDAV project home
13. https://www.mozilla.org/projects/calendar/lightning/ Lightning - Project Home
14. https://gitlab.com/CardBook/CardBook CardBook source
15. https://minetime.ai MineTime features
16. http://www.davical.org/clients.php?client=Mulberry Mulberry client configuration
17. https://caldavsynchronizer.org/ Outlook CalDav Synchronizer website
18. http://lostpackets.de/pycarddav/ pyCardDAV project home
19. https://www.ritlabs.com/en/products/thebat/features.php The Bat! - Features
20. https://sogo.nu/about.html SOGo Overview
21. http://www.reminderfox.org/ ReminderFox project home
22. Web site: Baïkal . 2021-03-10 .
23. http://tech.tiq.cc/2013/10/how-to-set-up-the-baikal-carddav-and-caldav-server-with-nginx-on-debian/ Baïkal iCal export
24. https://www.apereo.org/projects/bedework Bedework overview
25. Web site: Calendar and Contacts Server guiding standards . 2012-03-11 . https://web.archive.org/web/20120101122938/http://trac.calendarserver.org/wiki/docs-trunk . 2012-01-01 . dead .
26. http://keithp.com/calypso/ Calypso
27. https://www.cyrusimap.org/imap/concepts/features.html Cyrus IMAP Features
28. http://wiki.davical.org/w/RFC_Compliance DAViCal RFC Compliance
29. https://gitlab.com/davical-project/davical/-/blob/master/ChangeLog DAViCal ChangeLog
30. http://davmail.sourceforge.net/ DavMail project home
31. https://github.com/LordEidi/fennel/ Fennel on GitHub
32. https://www.group-office.com Group-Office website
33. https://nextcloud.com/ Nextcloud home
34. http://owncloud.org/ ownCloud home
35. Web site: A Simple Calendar and Contact Server . 2015-11-20.
36. http://sabre.io/dav/standards-support/ SabreDAV Supported RFC's
37. https://sogo.nu/about.html SOGo Overview
38. https://sogo.nu/bugs/view.php?id=3283 0003283: (read-only) Addressbook reports DAV:all privilege
39. https://sogo.nu/bugs/view.php?id=4822 0004822: Calender advertises wrong ACL for shared address books
40. https://sogo.nu/bugs/view.php?id=1310 0001310: CaldDAV calendar-query returns events out of specified range
41. https://sogo.nu/bugs/view.php?id=3161 0003161: Blackbery 10 can't edit event that was posted by KOrganizer (CalDAV)
42. https://sogo.nu/bugs/view.php?id=1204 0001204: update the icalendar handling to rfc 5545
43. https://sogo.nu/bugs/view.php?id=4747 0004747: SOGo creates invalid GEO value on import
44. https://sogo.nu/bugs/view.php?id=3608 0003608: Cannot save/display multiple calendar alerts for one calendar event.
45. https://sogo.nu/bugs/view.php?id=2574 0002574: No colors selectable if ressource ID contains space character
46. https://sogo.nu/bugs/view.php?id=5163 0005163: no carddav RFC 6578 compliance
47. Web site: Git-Backed CalDAV/CardDAV server . 2022-06-06. Xandikos
48. Web site: Zentyal Community Edition official Site . 2014-11-28 . https://web.archive.org/web/20120918122408/http://www.zentyal.org/ . 2012-09-18 . dead .
49. Web site: Meishi, A lightweight CardDAV server built on Rails 3; GitHub repository . . 2020-10-14 . https://web.archive.org/web/20180611032700/https://github.com/inferiorhumanorgans/meishi . 2018-06-11 . live .