Skip to content
ToolGPA

Open-Xchange alternatives · Email

End-to-end encrypted alternatives to Open-Xchange

The Open-Xchange 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.

Open-Xchange'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 Open-Xchange

  1. Proton Mail

    End-to-end encrypted email service based in Switzerland

    • Proton Mail has a free plan. Open-Xchange does not.
    • Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
    • Proton Mail is end-to-end encrypted, according to its own site.
    • Open-Xchange is self-hostable, according to its own site.
    Proton Mail pricing and details

  2. Tuta Mail

    End-to-end encrypted email and calendar from Germany

    • Tuta Mail has a free plan. Open-Xchange does not.
    • Only Tuta Mail lists Windows, macOS, Linux, iOS and Android apps.
    • Tuta Mail is end-to-end encrypted, according to its own site.
    • Open-Xchange is self-hostable, according to its own site.
    Tuta Mail pricing and details

  3. Canary Mail

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

    • Canary Mail has a free plan. Open-Xchange does not.
    • Only Canary Mail lists macOS, iOS, Windows and Android apps.
    • Only Open-Xchange lists a web app.
    • Canary Mail is end-to-end encrypted, according to its own site.
    Canary Mail pricing and details

  4. BlueMail

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

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

  5. Posteo

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

    • Posteo is end-to-end encrypted, according to its own site.
    • Open-Xchange is self-hostable, according to its own site.
    • Posteo also covers notes.
    Posteo pricing and details

  6. mailbox

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

    • mailbox is end-to-end encrypted, according to its own site.
    • Open-Xchange is open source and self-hostable, according to its own site.
    • mailbox also covers tasks, documents, video calls and file sync.
    mailbox pricing and details

  7. Mailfence

    Private email from Belgium with built-in OpenPGP encryption

    • Mailfence has a free plan. Open-Xchange does not.
    • Only Mailfence lists iOS and Android apps.
    • Mailfence is end-to-end encrypted, according to its own site.
    • Open-Xchange 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. Open-Xchange does not.
    • Only FairEmail lists an Android app.
    • Only Open-Xchange lists a web app.
    • 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. Open-Xchange does not.
    • Only CTemplar lists iOS and Android apps.
    • CTemplar is end-to-end encrypted, according to its own site.
    • Open-Xchange is self-hostable, according to its own site.
    CTemplar pricing and details

  10. AtomicMail

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

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

  11. FlowCrypt

    OpenPGP encryption for Gmail, as an extension and mobile apps

    • FlowCrypt has a free plan. Open-Xchange does not.
    • Only FlowCrypt lists iOS and Android apps.
    • Only FlowCrypt lists a browser extension.
    • Only Open-Xchange lists a web app.
    FlowCrypt pricing and details

Common questions

Is there an end-to-end encrypted alternative to Open-Xchange?

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

Is Open-Xchange end-to-end encrypted?

The Open-Xchange listing does not describe it as end-to-end encrypted. The listing was checked on Nov 13, 2026 against the pages it cites.

Which of these email apps are free?

Proton Mail, Tuta Mail, Canary Mail, BlueMail, Mailfence, FairEmail, CTemplar, AtomicMail 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 Open-Xchange: the alternatives its listing names first, then the tools that share the most features with it.