[atmosx]

What is your concern exactly? If it's privacy, from state level organizations like NSA you shouldn't be using mainstream IMs anyway. If it's just Zuckerberg then Telegram is fine and WhatsUp is not (anymore). If it's none of the above, then you're fine.

[fractalsea]

I think the point is is that even if you don't use mainstream services, than there's nothing stopping Facebook buying up whatever you were using at some point in the future.

[atmosx]

Well, if the conversation is encrypted and the connections are routed through tor, you don't really care who intercepts what.