Skip to content
ToolGPA

Thunderbird alternatives · Email

End-to-end encrypted alternatives to Thunderbird

The Thunderbird 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.

Thunderbird is free to use. 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 Thunderbird

  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). Thunderbird is free.
    • Only BlueMail lists an iOS app.
    • BlueMail is end-to-end encrypted, according to its own site.
    • Thunderbird is open source, according to its own site.
    BlueMail vs ThunderbirdBlueMail pricing and details

  2. FairEmail

    Open source, privacy-oriented email client for Android

    • FairEmail starts at $7.49 one-time (pro features, US Google Play in-app purchase). Thunderbird is free.
    • Only Thunderbird lists Windows, macOS and Linux apps.
    • FairEmail is end-to-end encrypted, according to its own site.
    • FairEmail can be bought with a one-time purchase.
    FairEmail vs ThunderbirdFairEmail pricing and details

  3. 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. Thunderbird is free.
    • Only Proton Mail lists a web app.
    • Only Proton Mail lists an iOS app.
    • Proton Mail is end-to-end encrypted, according to its own site.
    Proton Mail pricing and details

  4. Tuta Mail

    End-to-end encrypted email and calendar from Germany

    • Tuta Mail starts at €3 per month, paid yearly (lowest paid personal plan). Thunderbird is free.
    • Only Tuta Mail lists a web app.
    • Only Tuta Mail lists an iOS app.
    • Tuta Mail is end-to-end encrypted, according to its own site.
    Tuta Mail pricing and details

  5. 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). Thunderbird is free.
    • Thunderbird has a free plan. mailbox does not, though it has a free trial.
    • Only mailbox lists a web app.
    • Only Thunderbird lists Windows, macOS, Linux and Android apps.
    mailbox 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). Thunderbird is free.
    • Thunderbird has a free plan. Posteo does not.
    • Only Posteo lists a web app.
    • Only Thunderbird lists Windows, macOS, Linux and Android apps.
    Posteo 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. Thunderbird is free.
    • Only Canary Mail lists an iOS app.
    • Only Thunderbird lists a Linux app.
    • Canary Mail is end-to-end encrypted, according to its own site.
    Canary Mail pricing and details

  8. Mailfence

    Private email from Belgium with built-in OpenPGP encryption

    • Mailfence starts at €2.50 per month, billed yearly (Base). Thunderbird is free.
    • Only Mailfence lists a web app.
    • Only Mailfence lists an iOS app.
    • Only Thunderbird lists Windows, macOS and Linux apps.
    Mailfence pricing and details

Common questions

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

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

Is Thunderbird end-to-end encrypted?

The Thunderbird 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, FairEmail, Proton Mail, Tuta Mail, Canary Mail and Mailfence 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 Thunderbird: the alternatives its listing names first, then the tools that share the most features with it.