At least for the German one, it’s essentially a rebranding of existing open source products packaged/adapted to work as a suite.
For example, for editing documents they are using Collabora online (Libreoffice-based), for chat it’s Matrix, for storage Nextcloud, email & calendar from Ox Cloud, etc.
They really should GPL it all. The US will steal it and create AWS services
At least for the German one, it’s essentially a rebranding of existing open source products packaged/adapted to work as a suite.
For example, for editing documents they are using Collabora online (Libreoffice-based), for chat it’s Matrix, for storage Nextcloud, email & calendar from Ox Cloud, etc.