Threema – Mobile Messenger That Puts Security and Privacy First
https://threema.ch/en

Threema is the mobile messenger that puts security and privacy first. Features include: a) Guaranteed Privacy – Threema is designed to generate as little data on servers as possible: Groups and contact lists are solely managed on users’ devices, messages are immediately deleted after delivery. This effectively prevents the collection of meta data; b) Best-In-Class Encryption – Threema end-to-end encrypts all your communication including messages, voice calls, group chats, files and even status messages. Only the intended recipient, and nobody else can read your messages; c) Versatile and Feature-Rich – Threema makes secure communications easy and fun. Send text and voice messages as well as files and locations in single and group chats. Make voice calls, create polls, and use Threema on the desktop with Threema Web; d) Full Anonymity – Each Threema user generates a random Threema ID. No phone number or email address is required in order to use Threema. This enables you to use Threema completely anonymously; e) Trusted Contacts – Verify your contacts by scanning their QR code or by comparing the key fingerprints. This effectively prevents man-in-the-middle attacks, and you can be sure to communicate directly with the intended person; and f) Independent Company – Threema is a 100% independent and self-financed company in the heart of Switzerland with its own servers and in-house software development. Switzerland is a country with some of the most user friendly privacy laws in the world. This will be added to Privacy Resources Subject Tracer™. This will be added to Business Intelligence Resources Subject Tracer™. This will be added to Entrepreneurial Resources Subject Tracer™. This will be added to the tools section of Research Resources Subject Tracer™.