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Zimbra alternatives · Email

End-to-end encrypted alternatives to Zimbra

The Zimbra 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.

Zimbra's current pricing could not be confirmed from its own site. 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 Zimbra

  1. mailbox

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

    • Only Zimbra lists Windows, macOS, Linux, iOS and Android apps.
    • mailbox is end-to-end encrypted, according to its own site.
    • Zimbra is open source and self-hostable, according to its own site.
    • mailbox also covers documents, video calls and file sync.
    mailbox vs Zimbramailbox pricing and details

  2. Proton Mail

    End-to-end encrypted email service based in Switzerland

    • Proton Mail has a free plan. Zimbra does not.
    • Proton Mail is end-to-end encrypted, according to its own site.
    • Zimbra is self-hostable, according to its own site.
    • Zimbra also covers tasks.
    Proton Mail pricing and details

  3. Tuta Mail

    End-to-end encrypted email and calendar from Germany

    • Tuta Mail has a free plan. Zimbra does not.
    • Tuta Mail is end-to-end encrypted, according to its own site.
    • Zimbra is self-hostable, according to its own site.
    • Zimbra also covers tasks.
    Tuta Mail pricing and details

  4. Posteo

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

    • Only Zimbra lists Windows, macOS, Linux, iOS and Android apps.
    • Posteo is end-to-end encrypted, according to its own site.
    • Zimbra is self-hostable, according to its own site.
    • Posteo also covers notes.
    Posteo pricing and details

  5. Canary Mail

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

    • Canary Mail has a free plan. Zimbra does not.
    • Only Zimbra lists a web app.
    • Only Zimbra lists a Linux app.
    • Canary Mail is end-to-end encrypted, according to its own site.
    Canary Mail pricing and details

  6. BlueMail

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

    • BlueMail has a free plan. Zimbra does not.
    • Only Zimbra lists a web app.
    • BlueMail is end-to-end encrypted, according to its own site.
    • Zimbra is open source and self-hostable, according to its own site.
    BlueMail pricing and details

  7. Mailfence

    Private email from Belgium with built-in OpenPGP encryption

    • Mailfence has a free plan. Zimbra does not.
    • Only Zimbra lists Windows, macOS and Linux apps.
    • Mailfence is end-to-end encrypted, according to its own site.
    • Zimbra is open source and self-hostable, according to its own site.
    Mailfence pricing and details

  8. FairEmail

    Open source, privacy-oriented email client for Android

    • FairEmail has a free plan. Zimbra does not.
    • Only Zimbra lists a web app.
    • Only Zimbra lists Windows, macOS, Linux and iOS apps.
    • FairEmail is end-to-end encrypted, according to its own site.
    FairEmail pricing and details

  9. CTemplar

    Encrypted, anonymous email hosted in Iceland

    • CTemplar has a free plan. Zimbra does not.
    • Only Zimbra lists Windows, macOS and Linux apps.
    • CTemplar is end-to-end encrypted, according to its own site.
    • Zimbra is self-hostable, according to its own site.
    CTemplar pricing and details

  10. FlowCrypt

    OpenPGP encryption for Gmail, as an extension and mobile apps

    • FlowCrypt has a free plan. Zimbra does not.
    • Only FlowCrypt lists a browser extension.
    • Only Zimbra lists a web app.
    • Only Zimbra lists Windows, macOS and Linux apps.
    FlowCrypt pricing and details

  11. AtomicMail

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

    • AtomicMail has a free plan. Zimbra does not.
    • AtomicMail is end-to-end encrypted, according to its own site.
    • Zimbra is open source and self-hostable, according to its own site.
    • AtomicMail also covers email signature.
    AtomicMail pricing and details

Common questions

Is there an end-to-end encrypted alternative to Zimbra?

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

Is Zimbra end-to-end encrypted?

The Zimbra 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, Tuta Mail, Canary Mail, BlueMail, Mailfence, FairEmail, CTemplar, FlowCrypt 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 Zimbra: the alternatives its listing names first, then the tools that share the most features with it.