

I’ve run a matrix server with around 250 local users. The schema Matrix uses is fundementally flawed that leads to excessive resource usage, and the DB is very easy to corrupt. Plus, the encryption key management sucks in comparison to DeltaChat and SimpleX.
You effectively have no user id’s with chatmail relays with DeltaChat. Routing of messages uses the default TCP/IP stack and so you can just use TOR if you want to. Mentioning a chat systems ability to use TOR, as if that should be a part of the chat program rather than the system it self seems strange to me.