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...
Yup, it has a cost, but there’s perhaps a one or two orders of magnitude cost difference between hosting instant messaging + calls with something like XMPP, and hosting mastodon/Lemmy/Kbin (or why I do the former but not the later, and why I’m ok to pay for the service, esp. considering that my instance’s business model isn’t, unlike Reddit, to re-sell influence and data).