There are plenty of public matrix servers, most notably matrix.org hosted by the matrix developers. There is also a small list here: https://www.hello-matrix.ne

There are plenty of public matrix servers, most notably matrix.org hosted by the matrix developers. There is also a small list here: https://www.hello-matrix.net/public_servers.php https://www.hello-matrix.net/public_servers.php You don't have to host your own server.