Who said synchronous? It's a chatlike, but this is server-hosted async message and file storage. Also, the failure of xmpp/jabber to attract the masses in the last decade is no accident. On 15 January 2015 12:12:26 GMT+00:00, Nikos Roussos wrote: On January 15, 2015 1:20:22 PM EET, Cathal Garvey wrote: If the server code were open, how would you know the server was actually running that code anyway? Having the protocol documented so thoroughly makes the task of writing an alternative server trivial if time-consuming. I'd obviously prefer the server were AGPL, and I hope someone will write an AGPL'd server and federation. For now though, the client is open source, the crypto doesn't suck, the UX is excellent, and the threat model is pretty transparent. I'm *never* going to inflict PGP on friends, but I'll happily inflict this on them. Since this is mostly for synchronous communication, you can inflict jabber+otr, which has all the benefits you mention above. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.