Signal is the world’s most widely used truly private messaging app, and our cryptographic technologies provide extra layers of privacy beyond the Signal app itself. Since launching in 2013, the Signal Protocol—our end-to-end encryption technology—has become the de facto standard for private commu...
But you won’t be able to talk to someone on the official servers
Molly does?
Unless something changed here is Blogpost why they don’t federate https://signal.org/blog/the-ecosystem-is-moving/