It looks like Signal isn't as open source as you thought it was anymore

I ran a private Synapse server on an OpenBSD host w/ an encrypted fs. The only problem I ever had was I messed around w/ the SSL cert and someone's mobile app cached the old one, causing some connectivity problems (uninstalling and reinstalling did the trick, finally).

The mobile app is a little unpolished. It constantly wants you to validate other sessions, always flashes the "loading" graphic whenever you switch to it, etc. Those two things feel a little half-baked--enough that my friends were like "no thanks" (I know, I know but, what can you do).

But broadly I still think it's very promising and would personally use it if I could get anyone else to. They're also building another server in Go that should have much better performance, if you're interested in that kind of thing.