@rom Since yesterday i'm getting redirected to https://www.reseaujaune.com/yunohost/admin/ when i click on the link for "réseau jaune Mastodon instance".
The priority for users is privacy, encryption, group creation at 2 levels (public + private) and exchange of documents, pictures, videos & calls.Ease of use and installation process.
Diaspora lacks certain of these features, Minds is not yet (?) federated and no application is available on F-Droid ( if one wants to avoid Google Api ) : https://f-droid.org/fr/
Where as Riot, Nomad, Fedilab applications are available on F-Droid.
We forgot to mention movim : https://movim.eu/
App available on F-Droid too.
Friendica, Movim looks more user friendly than Hubzilla and this is very important, personnaly i used Diapora a while back so will try all 3.
From a hosting perspective, as you recommend XMPP should be considered.
Delta Chat : https://delta.chat/en/ has not yet a Windows Client, but is definatly interesting because it's a simple way to have encrypted chats with email protocol.
Other great software that can be recommended :
Text messaging, video and audio calls, file transfer, video conferencing
more confidential :
Briar doesn't rely on a central server - messages are synchronized directly between the users' devices.Use's the Tor Network, no Desktop app, Tor on mobile is far too slow, depending on location.