Suggest me a secure chat platform for my family

I am searching for a selfhosted and secure (end to end encryption) chat platform for my family (5-20 users), possibly one i can host on a raspi.

Is matrix a good choice, or should i try something else?

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Rocket chat is like slack but FOSS.. haven't tried it myself but it could be something
- Not FOSS anymore. More like open core these days.
- Not E2EE though, or at least not fully.
  
  I mean if it's just a private server for just the people he knows then I don't get why this would be a concern, but if it is to mitigate family drama then rocket chat definitely has end-to-end encryption https://docs.rocket.chat/use-rocket.chat/workspace-administration/settings/e2e-encryption

126 comments