Alternatives to ProtonMail for Linux with any license

Platforms

Desktop

Mobile

Web / Online

Show 18 less popular platforms
  • Mailpile icon

    Mailpile

    Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and...

    Free Open Source Mac Windows Linux Web Self-Hosted

    • Mailpile is fantastic, but it's not really a Protonmail alternative. Protonmail is a webmail service; Mailpile is an email client, not a service. But it is good and open source... just it serves a different purpose, really. JohnFastmanDec 2016 • 3 agrees and 0 disagrees Disagree   Agree
  • Enigmail icon

    Enigmail

    Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey.

    Free Open Source Mac Windows Linux Thunderbird SeaMonkey

    No features added Add a feature
    • Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey Guest • Jun 2017 • 1 agrees and 1 disagrees Disagree   Agree
  • PEPS icon

    PEPS

    PEPS is an open source secure email and file sharing platform.

    Free Open Source Linux

    No features added Add a feature
  • Secure Gmail icon

    Secure Gmail

    An extension to send secure, encrypted messages through Gmail. SecureGmail encrypts and decrypts emails you send in Gmail. This happens all on your machine, and the...

    Free Open Source Mac Windows Linux Chrome Gmail

  • WebPG icon

    WebPG

    WebPG is a free, open source suite of tools to bring GnuPG/PGP (gpg, gnupg) to the browser, in an effort to make cryptographic methods usable, safe and accessible to the...

    Free Open Source Mac Windows Linux Chrome Thunderbird SeaMonkey Chromium Firefox

  • Lockbin icon

    Lockbin

    Lockbin is a web application for sending private email messages and files. People use it to send things like credit card numbers or confidential information.

    Freemium Mac Windows Linux Android Android Tablet

    No features added Add a feature
  • OnionMail icon

    OnionMail

    OnionMail is an anonymous and encrypted mail server made to run on the TOR network without losing the ability to communicate with the Internet.

    Free Mac Windows Linux Web Android iPhone

  • Walnut Secure Email icon

    Walnut Secure Email

    Walnut Secure Email is P2P, person to person or end to end secure mail application that protects all of end-user existing accounts, including Gmail, Yahoo Mail...

    Commercial Windows Linux Android iPhone Blackberry Android Tablet iPad