https://12systems.de/bremer-rechenzentrum/it-outsourcing/owncloud-die-professionelle-alternative-zu-dropbox-ep/
https://help.ovhcloud.com/csm/de-public-cloud-storage-pcs-configure-owncloud-object-storage?id=kb_article_view&sysparm_article=KB0047078
https://es-lab.de/owncloud/
https://www.hosted-power.de/en/managed-hosting/others/managed-owncloud-hosting

https://www.seafile.com/en/partner/
https://forum.seafile.com/t/seafile-with-hosting-provider/7059 https://www.neuprime.de/services_seafile.php

seafile as 4sync, only up down view
nexclo as plesk with office