And who owns What'sApp?

"WhatsApp Messenger, or simply WhatsApp, is an American freeware, cross-platform centralized messaging and voice-over-IP service owned by Facebook, Inc."

And Messenger?

"Facebook Messenger is an American messaging app and platform developed by Facebook, Inc."

Don't shoot me, I'm just the messenger (with a lower case L). I think the only thing that's left is e-mail.