Open Whisper Systems

Open Whisper Systems is an open-source platform focused on advancing secure communications.

Open Whisper Systems is an open-source platform focused on advancing state-of-the-art for secure communication. Founded by Moxie Marlinspike in 2013, OWS is also focused on the development of the Signal Protocol. They also maintain an encrypted voice calling and instant messaging application called Signal. It also offers TextSecure, an easy-to-use encrypted text messaging application that enables secure local storage and transmission of SMS and MMS to other TextSecure users; and RedPhone, an easy-to-use encrypted VoIP application for smartphones.