ProtonMail - is an e-mail, which uses end-to-end encryption, making it impossible for third parties to monitor correspondence. In addition, the application provides a modern user interface with the latest features such as customizable gestures and the ability to send messages with a limited lifespan.

Funkcijos:

• Easy-to-use
  
• End-to-end encryption
  
• Timer for message self-destruction after sending
  
• Nice interface