E mail encryption software

Here are some popular email encryption software options:

  1. ProtonMail: A free, open-source email service that uses end-to-end encryption to protect emails. It's available as a web app and has mobile apps for Android and iOS.
  2. Tutanota: A free, open-source email service that uses end-to-end encryption to protect emails. It's available as a web app and has mobile apps for Android and iOS.
  3. GPG (GNU Privacy Guard): A free, open-source encryption software that can be used to encrypt and decrypt emails. It's available for Windows, macOS, and Linux.
  4. Enigmail: A free, open-source add-on for Mozilla Thunderbird that provides email encryption using PGP (Pretty Good Privacy) and S/MIME.
  5. PGP (Pretty Good Privacy): A commercial email encryption software that provides end-to-end encryption for emails. It's available for Windows, macOS, and Linux.
  6. S/MIME: A commercial email encryption software that provides end-to-end encryption for emails. It's available for Windows, macOS, and Linux.
  7. Virtru: A commercial email encryption software that provides end-to-end encryption for emails. It's available as a web app and has mobile apps for Android and iOS.
  8. Mailvelope: A free, open-source email encryption software that provides end-to-end encryption for emails. It's available as a web app and has mobile apps for Android and iOS.
  9. Cryptomator: A free, open-source email encryption software that provides end-to-end encryption for emails. It's available as a web app and has mobile apps for Android and iOS.
  10. OpenPGP: A free, open-source email encryption software that provides end-to-end encryption for emails. It's available for Windows, macOS, and Linux.

When choosing an email encryption software, consider the following factors:

  1. Ease of use: How easy is it to set up and use the software?
  2. End-to-end encryption: Does the software provide end-to-end encryption, or does it only encrypt emails in transit?
  3. Key management: How does the software manage encryption keys, and are they secure?
  4. Compatibility: Is the software compatible with your email client and operating system?
  5. Cost: Is the software free, or does it require a subscription or purchase?
  6. Reputation: What is the reputation of the software and its developers?

Remember that email encryption is just one part of a comprehensive security strategy. It's also important to use strong passwords, keep your email client and operating system up to date, and be cautious when clicking on links or downloading attachments.