Alternatives to Walnut Secure Email for all platforms with any license

  • ProtonMail icon

    ProtonMail

    Secure email with absolutely no compromises, brought to you by MIT and CERN scientists. Swiss Based ProtonMail is incorporated in Switzerland and our servers are located in Switzerland. We are outside of US and EU jurisdiction...

    Open Source Web / Cloud Android iPhone iPad

  • 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 all code related to the project is and will be released under an...

    Open Source Mac Windows Linux Web / Cloud Self-Hosted

  • Tutanota icon

    Tutanota

    Tutanota is a free and open source web-mail client that focuses on privacy. There's also an Android and an iOS app. All data is stored encrypted and can not be searched, i.e. for commercial usage. It offers dead easy end-to-end...

    Open Source Web / Cloud Android iPhone iPad

  • Enigmail icon

    Enigmail

    Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey. It enables you to write and receive email messages signed and/or encrypted with the OpenPGP standard. Sending and receiving encrypted and digitally...

    Open Source Mac Windows Linux Thunderbird SeaMonkey

    No features added Add a feature
  • Mailvelope icon

    Mailvelope

    Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard. Mailvelope integrates directly into the Webmail user interface, it's elements are unintrusive and easy to...

    Open Source Mac Windows Linux Chrome OS Chrome Firefox

  • GPGMail icon

    GPGMail

    GPGMail is an open source plugin for Apple Mail. It brings the functionality to sign, verify, encrypt and decrypt mails using the OpenPGP standard.

    Open Source Mac

    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 unencrypted text never reaches Google servers. This is useful if...

    Open Source Mac Windows Linux Chrome Gmail

  • Mailfence icon

    Mailfence

    Mailfence provides a secure and private Email solution that value and respect your online privacy. State of the art security features protect your email privacy at all times. Encryption, 2-factor authentication... Mailfence is...

    Freemium Web / Cloud

  • SCRYPTmail icon

    SCRYPTmail

    SCRYPTmail is true end-to-end encrypted email service. Email and meta data, i.e sender / recipient are encrypted when you communicate within scryptmail domain. Public Source Code - all source code is available for public audit...

    Freemium Web / Cloud

  • EveryCloud icon

    EveryCloud

    EveryCloud’s cloud based spam filtering service blocks 99.99% of spam, viruses and even newsletters if required. Set spam reports to give users control and view 90 days logs of all inbound and outbound email. Filter for specific...

    Commercial Web / Cloud

    No features added Add a feature
  • 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 common man. WebPG encompasses several projects, from the...

    Open Source Mac Windows Linux Chrome Thunderbird SeaMonkey ... Chromium Firefox

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  • 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
  • AnonymousSpeech

    Professional anonymity provider for secure anonymous email. Anonymous Domain and Hosting Offshore, Anonymous Surfing, SSL, Time Delayed, Bulk Email and many more functions.

    Freemium Web / Cloud

    No features added Add a feature
  • runbox icon

    runbox

    Runbox provides secure email communication with Perfect Forward Secrecy SSL connections, Extended Validation, and options for PGP encryption. We are committed to protecting your data in accordance with Norway's strong privacy...

    Commercial Web / Cloud

    No features added Add a feature
  • Sendinc icon

    Sendinc

    Secure email made simple Sendinc enables anyone to send and receive military-grade encrypted email in minutes and requires no special technical expertise. There is no required software to purchase, download, or install. There are...

    Commercial Web / Cloud

    No features added Add a feature
  • Encipher.it icon

    Encipher.it

    Encrypting email with Encipher.it is a simple way to protect your sensitive data. You can encrypt emails or text messages and only the recipient can decrypt it with correct password. Encipher.it integrated with Gmail and many other...

    Free Web / Cloud

    No features added Add a feature
  • Sfletter icon

    Sfletter

    You can send a protected attachment (PDF, JPEG) and a message to any email service that is available on Windows.

    Free Personal Windows

    No features added Add a feature
    • Warning Poor WOT reputation: https://www.mywot.com/en/scorecard/sfletter.com
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  • oneshar.es icon

    oneshar.es

    Sending confidential information such as passwords, account information and other sensitive data in emails and IM is not necessarily safe. That data is typically stored with remnants of the bits in places you don't need it to be.

    Free Web / Cloud Windows Mobile Android iPhone HP webOS Firefox OS

    • Discontinued The official website is no longer accessible and the iPhone app has been removed from the App Store.
  • Shazzlemail icon

    Shazzlemail

    ShazzleMail is the first privacy-protective and surveillance-resistant secure email service.

    Free Personal Mac Windows Linux Android iPhone

    No features added Add a feature
  • Invmail icon

    Invmail

    Secure, zero-knowledge, end-to-end communications platform, offering facilities such as e-mail, video/voice calling, and a messaging service.

    Free Personal Web / Cloud

    No features added Add a feature

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