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Superhuman Mail alternatives · Email

Self-hosted alternatives to Superhuman Mail

The Superhuman Mail listing does not say it can be self-hosted. 25 of the 125 other email apps in this directory can be self-hosted, according to their own sites.

Superhuman Mail is a paid product, starting at $25 per member / month, billed annually ($30 billed monthly). 19 of them are free or have a free plan.

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

The 12 closest to Superhuman Mail

  1. Inbox Zero

    Open source AI email assistant for Gmail and Outlook

    • Inbox Zero starts at $18 per user / month, billed annually ($20 billed monthly). Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • Inbox Zero is open source and self-hostable, according to its own site.
    • Inbox Zero also covers chat assistant, inbox filtering and workflow automation.
    • Superhuman Mail also covers calendar and booking links.
    Inbox Zero vs Superhuman MailInbox Zero pricing and details

  2. Zero Mail

    Open-source AI email client that connects your existing inboxes

    • Zero Mail starts at $20 per month (billing basis not shown). Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • Zero Mail has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    Zero Mail pricing and details

  3. Open-Xchange

    OX App Suite email platform sold to providers and governments

    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    • Open-Xchange is open source and self-hostable, according to its own site.
    • Superhuman Mail also covers booking links.
    Open-Xchange pricing and details

  4. GFI KerioConnect

    Self-hosted business mail server with calendar, chat and local AI

    • Only GFI KerioConnect lists a Linux app.
    • Only Superhuman Mail lists a web app.
    • Only Superhuman Mail lists iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    GFI KerioConnect pricing and details

  5. Zimbra

    Self-hosted email, calendar and file sharing for organizations

    • Only Zimbra lists a Linux app.
    • Only Superhuman Mail lists a browser extension.
    • Zimbra is open source and self-hostable, according to its own site.
    • Zimbra also covers tasks.
    Zimbra pricing and details

  6. SOGo

    Open-source groupware with webmail, calendars and contacts

    • SOGo is free. Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • SOGo has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    SOGo pricing and details

  7. Horde

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

    • Horde is free. Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • Horde has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    Horde pricing and details

  8. mailcow

    Dockerized open-source mail server with a web admin UI

    • mailcow is free. Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • mailcow has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    mailcow pricing and details

  9. Mail-in-a-Box

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

    • Mail-in-a-Box is free. Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • Mail-in-a-Box has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    Mail-in-a-Box pricing and details

  10. 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). Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • Stalwart Mail Server has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    Stalwart Mail Server pricing and details

  11. 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. Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • Afterlogic WebMail has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    Afterlogic WebMail pricing and details

  12. Modoboa

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

    • Modoboa is free. Superhuman Mail starts at $25 per member / month, billed annually ($30 billed monthly).
    • Modoboa has a free plan. Superhuman Mail does not.
    • Only Superhuman Mail lists macOS, Windows, iOS and Android apps.
    • Only Superhuman Mail lists a browser extension.
    Modoboa pricing and details

13 more that can be self-hosted

All 25 in one table

Common questions

Is there a self-hosted alternative to Superhuman Mail?

Yes. Inbox Zero, Zero Mail, Open-Xchange, GFI KerioConnect, Zimbra, SOGo, Horde, mailcow and 17 more can be self-hosted, according to their own sites.

Can Superhuman Mail be self-hosted?

The Superhuman Mail listing does not say it can be self-hosted. The listing was checked on Oct 4, 2026 against the pages it cites.

Which of these email apps are free?

Zero Mail, SOGo, Horde, mailcow, Mail-in-a-Box, Stalwart Mail Server, Afterlogic WebMail, Modoboa and 11 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 Superhuman Mail: the alternatives its listing names first, then the tools that share the most features with it.