FBI Document Says the Feds Can Get Your WhatsApp Data – In Real Time

WhatsApp (and iMesssage) is listed as only providing message content if iCloud backup is enabled. As the article says, it's the log of who is messaging who, when that is provided. This is in line with what the Signal protocol provides, and doesn't suggest any encryption is broken.

Perhaps more interesting is that WhatsAapp (and some other provides) have a copy of your contact list.