Hemlis is a secure-messaging app from one of the Pirate Bay cofounders.
Hemlis, which translates to "secret" in Swedish, is an upcoming messaging app whose founders promise to "close down the service before letting anyone in." Messages are only stored on servers until they are delivered, and if that takes too long, they trash the message and ask you to re-send.
Wiper gives you a kill switch for erasing conversations from your phone and whoever you were texting.
Make free, encrypted phone calls with Signal
Signal (iOS) uses a pair of advanced real-time encryption protocols to secure your phone conversations. The app even provides a set of unique keywords on the call screen so you can ensure you're talking to the person you dialed — and not a middleman.
Cyber Dust is Mark Cuban's vision for shrinking your digital footprint.
After Mark Cuban's messages were poured over by the SEC, he created Cyber Dust (iOS) to keep away the nosy. The app promises that your "messages never touch a hard drive."
Bleep promises to be an NSA-proof chat app from BitTorrent.
Bleep is an upcoming chat app that avoids centralized servers and instead delivers messages through a direct user-to-user line. BitTorrent never sees your messages or your metadata, and the company says "anything you say is 'bleep' to us."