Alternatives to runbox 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

  • 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

  • mailbox.org icon

    mailbox.org

    mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.org, is easy to remember and can be understood anywhere in the world. They have been operating e-mail accounts for more than 20 years...

    Commercial Web / Cloud Windows Mobile Android iPhone Android Tablet iPad Kindle Fire

  • 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

  • Posteo icon

    Posteo

    Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used. Posteo E-Mail ist ein leistungsstarkes Postfach mit viel Komfort und 100%...

    Commercial Web / Cloud

  • 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

  • PEPS icon

    PEPS

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

    Open Source Linux

  • 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

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  • InboxCube icon

    InboxCube

    For us Email is our lives. At the heart of our inbox lives a personal network of information and content that privately defines who we are. We believe that something as integral as email has been left behind in the current mobile...

    Free iPhone

  • 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

  • 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

  • CounterMail icon

    CounterMail

    Countermail is a web-based email service. It is hosted in Sweden. Its focus is on privacy. It provides several features, such as PGP support and diskless servers to protect users ability to communicate securely and anonymously.

    Commercial Web / Cloud

  • Fripost icon

    Fripost

    Fripost – the Free Email Association. Fripost organize the people who want an alternative to "free" e-mail services where you are constantly under surveillance and personal data is handed over to third parties.

    Open Source Web / Cloud

  • 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, Microsoft Hotmail, live.com, Outlook and hosted addresses, and corporate...

    Commercial Windows Linux Android iPhone Blackberry Android Tablet iPad

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  • 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

  • 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

  • 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

    • Warning Poor WOT reputation: https://www.mywot.com/en/scorecard/sfletter.com
  • Mynigma icon

    Mynigma

    Mynigma is a new kind of email client with built-in encryption.

    Free Personal Mac iPhone iPad

  • Topmail icon

    Topmail

    Private secure email. Ad free, spam free and encrypted. Topmail's email service is both secure and easy to use. It is available both on the desktop and via any mobile device.

    Commercial Web / Cloud Android iPhone Android Tablet iPad

  • Shazzlemail icon

    Shazzlemail

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

    Free Personal Mac Windows Linux Android iPhone

  • 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

  • CryptUP: Encrypt Gmail with PGP icon

    CryptUP: Encrypt Gmail with PGP

    CryptUP is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted.

    Open Source Mac Windows Linux Web / Cloud Chrome OS Chrome Chromium Chrome Web Store

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