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Microsoft Outlook alternatives · Email

End-to-end encrypted alternatives to Microsoft Outlook

The Microsoft Outlook listing does not describe it as end-to-end encrypted. 8 of the 51 other email apps in this directory are end-to-end encrypted, according to their own sites.

Microsoft Outlook has a free plan. Paid plans start at $1.99 per month, or $19.99 per year (Microsoft 365 Basic). 6 of them are free or have a free plan.

8 tools · Listings checked up to Oct 9, 2026 · Where the facts come from

How each one differs from Microsoft Outlook

  1. 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). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Only BlueMail lists a Linux app.
    • Only Microsoft Outlook lists a web app.
    • BlueMail is end-to-end encrypted, according to its own site.
    BlueMail pricing and details

  2. 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. Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Only Microsoft Outlook lists a web app.
    • Canary Mail is end-to-end encrypted, according to its own site.
    • Canary Mail can be bought with a one-time purchase.
    Canary Mail pricing and details

  3. 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). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Microsoft Outlook has a free plan. mailbox does not, though it has a free trial.
    • Only Microsoft Outlook lists Windows, macOS, iOS and Android apps.
    • mailbox is end-to-end encrypted, according to its own site.
    mailbox pricing and details

  4. 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. Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Only Proton Mail lists a Linux app.
    • Proton Mail is open source and end-to-end encrypted, according to its own site.
    • Microsoft Outlook also covers tasks and inbox filtering.
    Proton Mail pricing and details

  5. Tuta Mail

    End-to-end encrypted email and calendar from Germany

    • Tuta Mail starts at €3 per month, paid yearly (lowest paid personal plan). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Only Tuta Mail lists a Linux app.
    • Tuta Mail is open source and end-to-end encrypted, according to its own site.
    • Microsoft Outlook also covers tasks and inbox filtering.
    Tuta 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). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Microsoft Outlook has a free plan. Posteo does not.
    • Only Microsoft Outlook lists Windows, macOS, iOS and Android apps.
    • Posteo is open source and end-to-end encrypted, according to its own site.
    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). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Only Microsoft Outlook lists Windows and macOS apps.
    • 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). Microsoft Outlook starts at $1.99 per month, or $19.99 per year (Microsoft 365 Basic).
    • Only Microsoft Outlook lists a web app.
    • Only Microsoft Outlook lists Windows, macOS and iOS apps.
    • FairEmail is open source and end-to-end encrypted, according to its own site.
    FairEmail pricing and details

Common questions

Is there an end-to-end encrypted alternative to Microsoft Outlook?

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

Is Microsoft Outlook end-to-end encrypted?

The Microsoft Outlook listing does not describe it as end-to-end encrypted. The listing was checked on Oct 5, 2026 against the pages it cites.

Which of these email apps are free?

BlueMail, Canary Mail, Proton Mail, Tuta Mail, Mailfence and FairEmail 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 Oct 9, 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 Microsoft Outlook: the alternatives its listing names first, then the tools that share the most features with it.