Too bad the masses don't get the privacy angle in free products. I feel like FB<->WhatsApp is counting on just that by using a unintuitive "opt-out" policy. The moms,dads, and not so tech aware citizens won't even know what goes on underneath. They would be feeling falsely proud to use a 'secure','E-E encrypted' service not knowing 'privacy' is different from them.
I am using XMPP and it works as good as any other messaging app (fast end-2-end encryption included). And since it is an _federated_ protocol I am not bound to any provider.
There is just one major problem:
There seems to be a lack of client developers, because most clients are simply not up-to-date. I am using 'conversations' as an android client, which is quite good, but the desktop clients seem to lack any development momentum.