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...
Downside is minor bugs re inviting friends:
Gets confused by invites from Facebook (can’t automatically strip the trailing tracking code from the URL).
Fails scan of QR invite with your maybe camera app. Must scan from app.