The Electronic Frontier Foundation has created a very helpful secure messaging scorecard as part of their campaign for ‘secure and usable crypto’. Interesting to see just how insecure some of the bigger tools are:

Many options—including Google, Facebook, and Apple’s email products, Yahoo’s web and mobile chat, Secret, and WhatsApp—lack the end-to-end encryption that is necessary to protect against disclosure by the service provider. Several major messaging platforms, like QQ, Mxit, and the desktop version of Yahoo Messenger, have no encryption at all.