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Claws Mail alternatives · Email

End-to-end encrypted alternatives to Claws Mail

The Claws 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.

Claws 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 Claws Mail

  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. Claws Mail is free.
    • Only Proton Mail lists a web app.
    • Only Proton Mail lists macOS, iOS and Android apps.
    • Proton Mail is end-to-end encrypted, 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). Claws Mail is free.
    • Only Tuta Mail lists a web app.
    • Only Tuta Mail lists macOS, iOS and Android apps.
    • Tuta Mail is end-to-end encrypted, according to its own site.
    Tuta 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). Claws Mail is free.
    • Only BlueMail lists iOS, Android and macOS apps.
    • BlueMail is end-to-end encrypted, according to its own site.
    • Claws Mail is open source, according to its own site.
    BlueMail pricing and details

  4. Posteo

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

    • Posteo starts at €1 per month, prepaid (minimum top-up €12). Claws Mail is free.
    • Claws Mail has a free plan. Posteo does not.
    • Only Posteo lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    Posteo pricing and details

  5. FairEmail

    Open source, privacy-oriented email client for Android

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

  6. CTemplar

    Encrypted, anonymous email hosted in Iceland

    • CTemplar starts at $8 per month. Claws Mail is free.
    • Only CTemplar lists a web app.
    • Only CTemplar lists iOS and Android apps.
    • Only Claws Mail lists Linux and Windows apps.
    CTemplar pricing and details

  7. 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. Claws Mail is free.
    • Only Canary Mail lists macOS, iOS and Android apps.
    • Only Claws Mail lists a Linux app.
    • Canary Mail is end-to-end encrypted, according to its own site.
    Canary Mail 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). Claws Mail is free.
    • Claws Mail has a free plan. mailbox does not, though it has a free trial.
    • Only mailbox lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    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). Claws Mail is free.
    • Only Mailfence lists a web app.
    • Only Mailfence lists iOS and Android apps.
    • Only Claws Mail lists Linux and Windows apps.
    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 Claws Mail lists Linux and Windows apps.
    • 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). Claws Mail is free.
    • Only AtomicMail lists a web app.
    • Only AtomicMail lists macOS, iOS and Android apps.
    • 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 Claws Mail?

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

Is Claws Mail end-to-end encrypted?

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