Mailvelope is a free software for end-to-end encryption of email traffic inside of a web browser (Firefox or Chromium) that integrates itself into existing webmail applications. Developed by Thomas Oberndörfer
License: Open Source
Mailvelope provides a unique approach by adding encryption to existing email providers, making it ideal for users wanting to enhance their current email security. In contrast, Tutanota offers a complete secure email service with built-in encryption and a user-friendly interface, suitable for those who prefer an all-in-one solution.