The source have a script that builds in a docker from a bunch of other previously built binaries, allegedly to be built with keys that are secret, and then just

The source have a script that builds in a docker from a bunch of other previously built binaries, allegedly to be built with keys that are secret, and then just output "the apks are the same" and you have to believe that ¯\_ (ツ)_/¯ Still, years ahead anything else that actually have users. The server is mostly 100% closed source. There's one open source that you can host, but it's widely believed to not be even close to the one they use. I think only matrix is fully open and p2p.