@argv_minus_one
FWIW, Matrix has the best security features and the most interoperability, if those are concerns.
I run my own Matrix server and, as much as I want to love it, the reference implementations have too many dials and levers. It requires a lot of effort to trim down.
https://matrix.org/ecosystem/clients/schildichat/ did a nice job of making a simpler client, by moving the complexity from the app to the pronunciation. :unimpressedmsn:

@sri @shauna