Battle of the secure messaging apps: how Signal beats WhatsApp

​“While all three apps use the same secure-messaging protocol, they differ on exactly what information is encrypted, what metadata is collected, and what, precisely, is stored in the cloud—and therefore available, in theory at least, to government snoops and wily hackers.” Bottom line: Micah Lee recommends that you use Signal by Open Whisper Systems whenever you can.
theintercept.com