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Edison Mail alternatives · Email

Open-source alternatives to Edison Mail

Edison Mail is not described as open source on its own site. 8 of the 51 other email apps in this directory are open source, according to their own sites.

Edison Mail has a free plan. Paid plans start at $14.99 per month, or $99.99 per year (Edison Mail+). 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 Edison Mail

  1. FairEmail

    Open source, privacy-oriented email client for Android

    • FairEmail starts at $7.49 one-time (pro features, US Google Play in-app purchase). Edison Mail starts at $14.99 per month, or $99.99 per year (Edison Mail+).
    • Only Edison Mail lists iOS and Windows apps.
    • FairEmail is open source and end-to-end encrypted, according to its own site.
    • FairEmail can be bought with a one-time purchase.
    FairEmail vs Edison MailFairEmail pricing and details

  2. Inbox Zero

    Open source AI email assistant for Gmail and Outlook

    • Inbox Zero starts at $18 per user / month, billed annually ($20 billed monthly). Edison Mail starts at $14.99 per month, or $99.99 per year (Edison Mail+).
    • Edison Mail has a free plan. Inbox Zero does not, though it has a free trial.
    • Only Inbox Zero lists a web app.
    • Only Inbox Zero lists a macOS app.
    Inbox Zero pricing and details

  3. Wino Mail

    Free, open source mail and calendar app for Windows

    • Only Edison Mail lists iOS and Android apps.
    • Wino Mail is open source, according to its own site.
    • Wino Mail also covers templates, tasks and calendar.
    • Edison Mail also covers inbox filtering.
    Wino Mail 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. Edison Mail starts at $14.99 per month, or $99.99 per year (Edison Mail+).
    • Only Proton Mail lists a web app.
    • Only Proton Mail lists macOS and Linux apps.
    • Proton Mail is open source and end-to-end encrypted, according to its own site.
    Proton Mail pricing and details

  5. Thunderbird

    Free, open-source email app for Windows, macOS, Linux and Android

    • Thunderbird is free. Edison Mail starts at $14.99 per month, or $99.99 per year (Edison Mail+).
    • Only Thunderbird lists macOS and Linux apps.
    • Only Edison Mail lists an iOS app.
    • Thunderbird is open source, according to its own site.
    Thunderbird pricing and details

  6. Tuta Mail

    End-to-end encrypted email and calendar from Germany

    • Tuta Mail starts at €3 per month, paid yearly (lowest paid personal plan). Edison Mail starts at $14.99 per month, or $99.99 per year (Edison Mail+).
    • Only Tuta Mail lists a web app.
    • Only Tuta Mail lists macOS and Linux apps.
    • Tuta Mail is open source and end-to-end encrypted, according to its own site.
    Tuta Mail pricing and details

  7. Mailspring

    Open-source desktop email client for Mac, Windows and Linux

    • Mailspring starts at $8 per month, or $85 per year (Mailspring Pro). Edison Mail starts at $14.99 per month, or $99.99 per year (Edison Mail+).
    • Only Mailspring lists macOS and Linux apps.
    • Only Edison Mail lists iOS and Android apps.
    • Mailspring is open source, according to its own site.
    Mailspring pricing and details

  8. Posteo

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

    • Posteo starts at €1 per month, prepaid (minimum top-up €12). Edison Mail starts at $14.99 per month, or $99.99 per year (Edison Mail+).
    • Edison Mail has a free plan. Posteo does not.
    • Only Posteo lists a web app.
    • Only Edison Mail lists iOS, Android and Windows apps.
    Posteo pricing and details

Common questions

Is there an open-source alternative to Edison Mail?

Yes. FairEmail, Inbox Zero, Wino Mail, Proton Mail, Thunderbird, Tuta Mail, Mailspring and Posteo are open source, according to their own sites.

Is Edison Mail open source?

Edison Mail is not described as open source on its own site. The listing was checked on Oct 5, 2026 against the pages it cites.

Which of these email apps are free?

FairEmail, Wino Mail, Proton Mail, Thunderbird, Tuta Mail and Mailspring 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 Edison Mail: the alternatives its listing names first, then the tools that share the most features with it.