[BillinghamJ]

What about Telegram? Seems to work well for me, and a key thing is it has a desktop client. The thing which annoys me about it though is by default it isn't client-to-client encrypted. When you create a "secret chat" which is fully encrypted, it doesn't work on all your devices.

[glogla]

Telegram's crypto is probably broken - they are using weird 90's and unproven crypto modes instead of normal stuff, and their "crypto challenge" is bogus, if you are to believe tptacek.

They also have attitude of "oh we are smart, you just don't get it", which is not the way anyone should think about cryptography.