Apps for all platforms with any license

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Show 23 less popular platforms
  • 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.

     

    ProtonMail icon

    Freemium $ $ $ Web Android iPhone iPad

  • Tutanota

    Tutanota is a free and open source web-mail client that focuses on privacy and security. It has open source iOS and an Android apps.

     

    Tutanota icon

    Free Personal $ $ $ Open Source Web Android iPhone iPad

  • Mailpile

    Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

     

    Mailpile icon

    Free Open Source Mac Windows Linux Web Self-Hosted OpenPGP

  • 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.

     

    Enigmail icon

    Free Open Source Mac Windows Linux GnuPG Thunderbird SeaMonkey

  • Lavabit

    Secure email for the world. Because everyone has the right to communicate privately.

     

    Lavabit icon

    Freemium Web

  • Mailvelope

    Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard.

     

    Mailvelope icon

    Free Open Source Mac Windows Linux Chrome OS Chrome Firefox

  • Mailfence

    Mailfence is a free secure and private mail service, that provides an end-to-end encrypted email.

     

    Mailfence icon

    Freemium $ $ $ Web Android iPhone Android Tablet iPad

  • 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.

     

    mailbox.org icon

    Commercial $ $ $ Web

  • MsgSafe.io

    MsgSafe.io provides private, encrypted, online communication with layers of security you can trust.

     

    MsgSafe.io icon

    Freemium Web Android iPhone S/MIME OpenPGP

  • Hushmail

    Hushmail is a commercial email service focusing on security with features such as industry-standard OpenPGP encryption and two-step verification. All communications also use a secure SSL/TLS connection.

     

    Hushmail icon

    Commercial Web iPhone iPad

  • MDaemon Messaging Server

    Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for companies that want control of their email. Integrated web-mail with doc sharing, Drop Box integration, client and server side encryption.

     

    MDaemon Messaging Server icon

    Commercial Windows

  • Spike

    Spike is the world’s first conversational email app. Welcome to the shortest path to done. .

     

    Spike icon

    Freemium $ $ $ Mac Windows Android iPhone Android Tablet iPad

  • FlowCrypt

    FlowCrypt (formerly CryptUp) is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted.

     

    FlowCrypt icon

    Freemium Mac Windows Linux Web Android Chrome OS Chrome Firefox ... OpenPGP

  • GPGMail

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

     

    GPGMail icon

    Commercial $ $ $ Mac GPGTools

  • APG

    Android Privacy Guard (APG) is a free and open source application for Android devices, created by Thialfihar, that lets you encrypt and decrypt single files or emails. Its goal is to provide a similar https://alternativeto .

     

    APG icon

    Free Open Source Android Android Tablet OpenPGP

  • 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.

     

    SCRYPTmail icon

    Freemium Web

  • GPG Suite

    GPG for Mail is an open source plugin for Apple Mail. Encrypt, decrypt, sign and verify mails using OpenPGP with a few simple clicks. GPG Keychain is an open source application for Mac OS X.

     

    GPG Suite icon

    Commercial $ $ $ Open Source Mac GnuPG

  • 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.

     

    Secure Gmail icon

    Free Open Source Mac Windows Linux Chrome Gmail

  • SophiMail

    SophiMail is a fully-featured email and collaboration server solving the most critical email issues: maximizes Privacy, Portability and Cost efficiency, Admin & User productivity.

     

    SophiMail icon

    Commercial BSD VirtualBox Self-Hosted VMware vSphere Hypervisor

  • 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.

     

    CounterMail icon

    Commercial Web

  • Steganos Privacy Suite

    Safely encrypt sensitive data On PC, in networks and in the Cloud Confidential documents, business records and TAN lists all belong in a safe place.

     

    Steganos Privacy Suite icon

    Commercial Windows

  • Bridge

    Protonmail provide encrypted email. Bridge is a Win/Mac/Linux app developed by Protonmail to allow the encrypted email account to be used with local email clients, like Thunderbird or MS Outlook.

     

    Bridge icon

    Free Mac Windows Linux

  • Virtru

    Virtru provides digital privacy technology to let you easily share information securely through all major email programs and applications. Virtru puts you in charge of how your digital information is shared.

     

    Virtru icon

    Freemium Web iPhone Yahoo! Mail Outlook Gmail

  • BitMail

    - Qt E-Mail Client. - Build-in Encryption to secure E-Mails - Secure P2P Email from Friend to Friend without relying on a central server. - Chat and Instant Messaging is build in. Define & Add your friends.

     

    BitMail icon

    Free Open Source Windows

  • 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.

     

    InboxCube icon

    Free iPhone

    • Discontinued The official website is no longer available.