http://j4dhkkxfcsvzvh3p5djkmuehhgd6t6l7wmzih6b4ss744hegwkiae7ad.onion/en/blog/disroot-joins-the-matrix-network
Another very promising feature is its bridge possibilities. Bridging means you can connect different networks/protocols with Matrix network to have bidirectional communication. At this moment any IRC, Slack or Gitter, telegram and XMPP-MUC room can be bridged together with Matrix, enabling people on all those separate networks to communicate with one another.