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Mailu alternatives · Email

End-to-end encrypted alternatives to Mailu

The Mailu 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.

Mailu 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 Mailu

  1. 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. Mailu is free.
    • Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
    • Proton Mail is end-to-end encrypted, according to its own site.
    • Mailu 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 starts at €3 per month, paid yearly (lowest paid personal plan). Mailu is free.
    • Only Tuta Mail lists Windows, macOS, Linux, iOS and Android apps.
    • Tuta Mail is end-to-end encrypted, according to its own site.
    • Mailu is self-hostable, according to its own site.
    Tuta Mail pricing and details

  3. Posteo

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

    • Posteo starts at €1 per month, prepaid (minimum top-up €12). Mailu is free.
    • Mailu has a free plan. Posteo does not.
    • Posteo is end-to-end encrypted, according to its own site.
    • Mailu is self-hostable, according to its own site.
    Posteo pricing and details

  4. FairEmail

    Open source, privacy-oriented email client for Android

    • FairEmail starts at $7.49 one-time (pro features, US Google Play in-app purchase). Mailu is free.
    • Only FairEmail lists an Android app.
    • Only Mailu lists a web app.
    • FairEmail is end-to-end encrypted, according to its own site.
    FairEmail pricing and details

  5. CTemplar

    Encrypted, anonymous email hosted in Iceland

    • CTemplar starts at $8 per month. Mailu is free.
    • Only CTemplar lists iOS and Android apps.
    • CTemplar is end-to-end encrypted, according to its own site.
    • Mailu is self-hostable, according to its own site.
    CTemplar pricing and details

  6. 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. Mailu is free.
    • Only Canary Mail lists macOS, iOS, Windows and Android apps.
    • Only Mailu lists a web app.
    • Canary Mail is end-to-end encrypted, according to its own site.
    Canary Mail pricing and details

  7. 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). Mailu is free.
    • Only BlueMail lists iOS, Android, macOS, Windows and Linux apps.
    • Only Mailu lists a web app.
    • BlueMail is end-to-end encrypted, according to its own site.
    BlueMail pricing and details

  8. 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). Mailu is free.
    • Mailu has a free plan. mailbox does not, though it has a free trial.
    • mailbox is end-to-end encrypted, according to its own site.
    • Mailu is open source and self-hostable, according to its own site.
    mailbox pricing and details

  9. Mailfence

    Private email from Belgium with built-in OpenPGP encryption

    • Mailfence starts at €2.50 per month, billed yearly (Base). Mailu is free.
    • Only Mailfence lists iOS and Android apps.
    • Mailfence is end-to-end encrypted, according to its own site.
    • Mailu is open source and self-hostable, according to its own site.
    Mailfence pricing and details

  10. FlowCrypt

    OpenPGP encryption for Gmail, as an extension and mobile apps

    • Only FlowCrypt lists iOS and Android apps.
    • Only FlowCrypt lists a browser extension.
    • Only Mailu lists a web app.
    • FlowCrypt is end-to-end encrypted, according to its own site.
    FlowCrypt 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). Mailu is free.
    • Only AtomicMail lists Windows, macOS, Linux, iOS and Android apps.
    • AtomicMail is end-to-end encrypted, according to its own site.
    • Mailu is open source and self-hostable, according to its own site.
    AtomicMail pricing and details

Common questions

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

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

Is Mailu end-to-end encrypted?

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