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GMX Mail alternatives · Email

End-to-end encrypted alternatives to GMX Mail

The GMX Mail listing does not describe it as end-to-end encrypted. 11 of the 125 other email apps in this directory are end-to-end encrypted, according to their own sites.

GMX Mail is free to use. 9 of them are free or have a free plan.

11 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

How each one differs from GMX Mail

  1. mailbox

    Paid, ad-free email with cloud storage and office tools from Germany

    • mailbox starts at €1 per month, annual payment only (€12 a year, Light). GMX Mail is free.
    • GMX Mail has a free plan. mailbox does not, though it has a free trial.
    • Only GMX Mail lists iOS and Android apps.
    • Only GMX Mail lists a browser extension.
    mailbox vs GMX Mailmailbox pricing and details

  2. Proton Mail

    End-to-end encrypted email service based in Switzerland

    • Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. GMX Mail is free.
    • Only Proton Mail lists macOS, Windows and Linux apps.
    • Only GMX Mail lists a browser extension.
    • Proton Mail is open source and end-to-end encrypted, according to its own site.
    Proton Mail vs GMX MailProton Mail pricing and details

  3. BlueMail

    Cross-platform email client with a unified inbox and built-in AI

    • BlueMail starts at $35.99 per year (Plus, shown as $3 per month billed annually). GMX Mail is free.
    • Only BlueMail lists macOS, Windows and Linux apps.
    • Only GMX Mail lists a web app.
    • Only GMX Mail lists a browser extension.
    BlueMail pricing and details

  4. Tuta Mail

    End-to-end encrypted email and calendar from Germany

    • Tuta Mail starts at €3 per month, paid yearly (lowest paid personal plan). GMX Mail is free.
    • Only Tuta Mail lists Windows, macOS and Linux apps.
    • Only GMX Mail lists a browser extension.
    • Tuta Mail is open source and end-to-end encrypted, according to its own site.
    Tuta Mail pricing and details

  5. Canary Mail

    AI email client with PGP encryption for Mac, iOS, Windows, Android

    • Canary Mail starts at $36 per year (Growth), shown as $3 per month billed yearly. GMX Mail is free.
    • Only Canary Mail lists macOS and Windows apps.
    • Only GMX Mail lists a web app.
    • Only GMX Mail lists a browser extension.
    Canary Mail pricing and details

  6. Posteo

    Ad-free, green-powered email from Berlin for €1 a month

    • Posteo starts at €1 per month, prepaid (minimum top-up €12). GMX Mail is free.
    • GMX Mail has a free plan. Posteo does not.
    • Only GMX Mail lists iOS and Android apps.
    • Only GMX Mail lists a browser extension.
    Posteo pricing and details

  7. Mailfence

    Private email from Belgium with built-in OpenPGP encryption

    • Mailfence starts at €2.50 per month, billed yearly (Base). GMX Mail is free.
    • Only GMX Mail lists a browser extension.
    • Mailfence is end-to-end encrypted, according to its own site.
    • Mailfence also covers documents.
    Mailfence pricing and details

  8. FairEmail

    Open source, privacy-oriented email client for Android

    • FairEmail starts at $7.49 one-time (pro features, US Google Play in-app purchase). GMX Mail is free.
    • Only GMX Mail lists a web app.
    • Only GMX Mail lists an iOS app.
    • Only GMX Mail lists a browser extension.
    FairEmail pricing and details

  9. FlowCrypt

    OpenPGP encryption for Gmail, as an extension and mobile apps

    • Only GMX Mail lists a web app.
    • FlowCrypt is end-to-end encrypted, according to its own site.
    • GMX Mail also covers calendar and inbox filtering.
    FlowCrypt pricing and details

  10. CTemplar

    Encrypted, anonymous email hosted in Iceland

    • CTemplar starts at $8 per month. GMX Mail is free.
    • Only GMX Mail lists a browser extension.
    • CTemplar is open source and end-to-end encrypted, according to its own site.
    • GMX Mail also covers calendar and inbox filtering.
    CTemplar pricing and details

  11. AtomicMail

    Encrypted email with a free plan and custom-domain business plans

    • AtomicMail starts at $3 per user / month (Business Starter, billing basis not stated). GMX Mail is free.
    • Only AtomicMail lists Windows, macOS and Linux apps.
    • Only GMX Mail lists a browser extension.
    • AtomicMail is end-to-end encrypted, according to its own site.
    AtomicMail pricing and details

Common questions

Is there an end-to-end encrypted alternative to GMX Mail?

Yes. mailbox, Proton Mail, BlueMail, Tuta Mail, Canary Mail, Posteo, Mailfence, FairEmail and 3 more are end-to-end encrypted, according to their own sites.

Is GMX Mail end-to-end encrypted?

The GMX Mail listing does not describe it as end-to-end encrypted. The listing was checked on Nov 12, 2026 against the pages it cites.

Which of these email apps are free?

Proton Mail, BlueMail, Tuta Mail, Canary Mail, Mailfence, FairEmail, FlowCrypt, CTemplar and 1 more are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 4, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to GMX Mail: the alternatives its listing names first, then the tools that share the most features with it.