@dominik There is something like 20 @xmpp clients that supports OMEMO E2EE https://xmpp.org/extensions/xep-0384.html đ
See https://omemo.top/ for the complete list â¨
Movim have a basic support as well but not as advanced as stable as on @dino , @gajim , Conversations, @Monal , converse.js...
Plenty of choices! đ