So, I have a Threema license, but from what I’ve seen its encryption isn’t post-quantum. Signal’s encryption seems the strongest. I host my own matrix server.
Also, I kind of don’t care where the servers are or which provider it is. Everything is encrypted anyway.
OK, and how is that different from the other chats?
You do know that at least Signal and Matrix use pretty much the same crypto, right?
And Matrix can be self-hosted, so I don’t need to worry about what they can see anyway.
On this point alone Matrix appears more secure than Signal…
And Threema is Switzerland-based, so by default it’s more trustful than a USA-based company.