It is more secure than Skype for sure but still there is a server where all the information is stored.Try Telegram. Didn't test sending .zip, but it's surely more secure, than Skype or any other popular IM's.
In my opinion, it is not as secure as it has been advertised ( I made a few tests with Wireshark). There is no folder transfer as well, only file transfer.I read about Telegram. Has anyone heard about it? Any opinions?
Yeah, Whatsapp is good for messaging.For messaging I think Whatsapp is best. But not for file sharing or transferring.
Is there a desktop version?Yeah, Whatsapp is good for messaging.