Skip to content
ToolGPA

SmarterMail alternatives · Email

Open-source alternatives to SmarterMail

SmarterMail is not described as open source on its own site. 39 of the 125 other email apps in this directory are open source, according to their own sites.

SmarterMail has a free plan. Paid plans start at $550 for Professional with 50 mailboxes; license term not stated. 33 of them are free or have a free plan.

39 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

The 12 closest to SmarterMail

  1. Zimbra

    Self-hosted email, calendar and file sharing for organizations

    • SmarterMail has a free plan. Zimbra does not.
    • Only Zimbra lists macOS, iOS and Android apps.
    • Zimbra is open source, according to its own site.
    • Zimbra also covers tasks.
    Zimbra vs SmarterMailZimbra pricing and details

  2. hMailServer

    Free open-source mail server that runs on Windows

    • hMailServer is free. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists a web app.
    • Only SmarterMail lists a Linux app.
    • hMailServer is open source, according to its own site.
    hMailServer vs SmarterMailhMailServer pricing and details

  3. Stalwart Mail Server

    Open-source mail and collaboration server written in Rust

    • Stalwart Mail Server starts at $2.40 per mailbox / year, billed annually (25-mailbox minimum). SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists Windows and Linux apps.
    • Stalwart Mail Server is open source, according to its own site.
    • Stalwart Mail Server also covers dMARC.
    Stalwart Mail Server pricing and details

  4. SOGo

    Open-source groupware with webmail, calendars and contacts

    • SOGo is free. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists Windows and Linux apps.
    • SOGo is open source, according to its own site.
    • SmarterMail also covers file sharing.
    SOGo pricing and details

  5. Open-Xchange

    OX App Suite email platform sold to providers and governments

    • SmarterMail has a free plan. Open-Xchange does not.
    • Only SmarterMail lists Windows and Linux apps.
    • Open-Xchange is open source, according to its own site.
    • SmarterMail also covers file sharing.
    Open-Xchange pricing and details

  6. Horde

    Free open-source webmail, calendar, contacts and tasks suite

    • Horde is free. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists Windows and Linux apps.
    • Horde is open source, according to its own site.
    • Horde also covers notes and tasks.
    Horde pricing and details

  7. mailcow

    Dockerized open-source mail server with a web admin UI

    • mailcow is free. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists Windows and Linux apps.
    • mailcow is open source, according to its own site.
    • SmarterMail also covers file sharing.
    mailcow pricing and details

  8. Mail-in-a-Box

    Free script that turns a cloud server into your own mail server

    • Mail-in-a-Box is free. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists Windows and Linux apps.
    • Mail-in-a-Box is open source, according to its own site.
    • SmarterMail also covers file sharing.
    Mail-in-a-Box pricing and details

  9. Afterlogic WebMail

    Webmail front end for an existing IMAP mail server

    • Afterlogic WebMail starts at $49 one-time for 5 users, first year of support included. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists Windows and Linux apps.
    • Afterlogic WebMail is open source, according to its own site.
    • SmarterMail also covers file sharing.
    Afterlogic WebMail pricing and details

  10. Modoboa

    Open-source mail server with a web admin panel and webmail

    • Modoboa is free. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists Windows and Linux apps.
    • Modoboa is open source, according to its own site.
    • SmarterMail also covers file sharing.
    Modoboa pricing and details

  11. iRedMail

    Open-source mail server installer for Linux and BSD

    • iRedMail starts at $499 for a 1-year iRedAdmin-Pro license, $250 per year to renew. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only SmarterMail lists a web app.
    • Only SmarterMail lists a Windows app.
    • iRedMail is open source, according to its own site.
    iRedMail pricing and details

  12. 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. SmarterMail starts at $550 for Professional with 50 mailboxes; license term not stated.
    • Only Proton Mail lists macOS, iOS and Android apps.
    • Proton Mail is open source and end-to-end encrypted, according to its own site.
    • SmarterMail is self-hostable, according to its own site.
    Proton Mail pricing and details

27 more that are open source

All 39 in one table

Common questions

Is there an open-source alternative to SmarterMail?

Yes. Zimbra, hMailServer, Stalwart Mail Server, SOGo, Open-Xchange, Horde, mailcow, Mail-in-a-Box and 31 more are open source, according to their own sites.

Is SmarterMail open source?

SmarterMail is not described as open source on its own site. The listing was checked on Nov 13, 2026 against the pages it cites.

Which of these email apps are free?

hMailServer, Stalwart Mail Server, SOGo, Horde, mailcow, Mail-in-a-Box, Afterlogic WebMail, Modoboa and 25 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 SmarterMail: the alternatives its listing names first, then the tools that share the most features with it.