Founder(s): Open Whisper Systems
Founded: July 29, 2014
Type Of App: Instant Messaging, Social Media
Use: Instant Messaging, VoIP
Nature Of Business: Public
Area Served: Worldwide
Industry Type: Internet
Open Whisper Systems' Signal (, ) is another fantastic messaging solution for security-conscious mobile users. Folding in both of Open Whisper Systems' private messaging and calling apps RedPhone and TextSecure, Signal is an all-in-one messaging and voice call solution that uses end-to-end military grade encryption. You can send text, voice, group messages, media and attachments. Ease of use and strong, open source, regularly audited encryption makes it a favorite of the security conscious, with accolades from the likes of Edward Snowden and other privacy advocates.