Alternatives to ProtonMail for Linux with any license

  • 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...

    • 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 • 14 agrees and 1 disagrees Disagree   Agree
    • Mailpile is a client, protonmail is a service. It's like, say, Google Chrome vs Google Search Guest • Jul 2018 • 2 agrees and 0 disagrees Disagree   Agree

    Free Open Source Mac Windows Linux Web Self-Hosted ... OpenPGP

    Mailpile icon
  • Enigmail

    Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey.

    • Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey Guest • Jun 2017 • 5 agrees and 2 disagrees Disagree   Agree

    Free Open Source Mac Windows Linux GnuPG Thunderbird ... SeaMonkey

    No features added Add a feature

    Enigmail icon
  • Inboxer

    Unofficial, free and open-source Google Inbox Desktop App. Built using electron, Inboxer includes a menu bar which is globalmenu compatible and works, and keyboard...

    Free Open Source Mac Windows Linux

    No features added Add a feature

    Inboxer icon
  • PEPS

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

    Free Open Source Linux

    No features added Add a feature

    PEPS icon
    • Discontinued Project was acquired by another company and converted into generic end-to-end encryption software
  • 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

    Secure Gmail 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

    OnionMail 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

    Lockbin 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

    Walnut Secure Email icon

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