Sync contacts between ownCloud and countless other apps

ownCloud is free software for storing data (file hosting) on your own server. If a corresponding client is used, it is automatically synchronized with a local directory. This means that a consistent database can be accessed from several computers. The project was launched in January 2010 to create a free alternative to commercial cloud service providers. Unlike commercial storage services, ownCloud can be installed on a private server or web space. In this way, concerns about data transfer and the associated relinquishment of control over the data can be dispelled, especially in the case of sensitive data.
App is available.

Sync contacts between ownCloud and other apps like:

AGFEO
AGFEOtel
Android
ansitel
API
Apple iCloud
Apple iOS
Apple iPhone
Apple macOS
Apple OSX
Asterisk
AVM FRITZ!Box
CardDAV
corpoTel
CSV
DATEV
Deutsche Telefon Tk-Anlage CentrexX
DocBee
facilioo
Gigaset
Google Contacts
Google GMail
Google Nexus
Google Pixel
GSuite
HubSpot
INOPLA
LDAP
Microsoft 365
Microsoft 365 Shared Mailbox
Microsoft Active Directory
Microsoft Dynamics 365
Microsoft Global Address List (GAL)
Microsoft Graph API
Microsoft Office 365
Microsoft Outlook
Microsoft Teams
Mozilla Thunderbird
MyCRM
Nextcloud
NFON
o2 digital phone
Pascom
Personio
PhoneSuite
Pipedrive
Placetel
Plusnet
salesforce
Sipgate
snom
STARFACE
SugarCRM
SWYX
Telekom NetPhone
UCware
Unify
weclapp
XELION
Yealink
Zendesk
Zoho