Matrix is an open-source decentralized E2EE messaging protocol.

Here are the european instances you can sign up at:

🇬🇧 UK: matrix.org

🇫🇷 France: tendomium & imagisphe.re & hadoly.fr

🇩🇪 Germany: tchncs.de, catgirl.cloud, pub.solar, yatrix.org, digitalprivacy.diy, oblak.be, nope.chat, envs.net, hot-chilli.im, synod.im & rollenspiel.chat

🇳🇱 Netherlands: bark.lgbt

🇦🇹 Austria: gemeinsam.jetzt & private.coffee

🇫🇮 Finland: pikaviestin.fi

For desktop use Element

For mobile use Fluffy Chat

Let me know if I missed any instances and I will be sure to update the post.