Nextcloud Hub
🇩🇪Self-hostable German collaboration suite bundling files, chat, groupware, and office editing into one platform from Nextcloud GmbH.
Nextcloud Hub is the full suite assembled by Nextcloud GmbH of Stuttgart, Germany: Files for storage and sync, Talk for chat and calls, Groupware for mail, calendar and contacts, Office for collaborative document editing, plus the Assistant and Flow automation modules. Organizations run it on their own servers or through a Nextcloud-certified hosting partner.
This entry covers the suite as a whole, for teams comparing it against a single US productivity hub. The individual modules are listed separately where they compete head-on with a single US product — see Nextcloud for storage and sync, and Nextcloud Talk for video and chat.