[justanton]

Surprised that no one has mentioned Telegram https://telegram.org/ so far:

Encryption, fantastic stickers, photo editor, tons of interesting channels, probably the best bots platform out there.

+ all mobile platforms and desktop version (as well as web based)

You can also find it's code on github.

[__derek__]

The last I read was that Telegram was not secure. Is that not the case?

[dylz]

IIRC telegram secret chats are somewhat fine, all normal chat and group chat is insecure

Correct me if I'm wrong though

[__derek__]

Reading more about it, I think you're right.