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Claws Mail alternatives · Email

Self-hosted alternatives to Claws Mail

The Claws 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.

Claws Mail is free to use. 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 Claws Mail

  1. Zero Mail

    Open-source AI email client that connects your existing inboxes

    • Zero Mail starts at $20 per month (billing basis not shown). Claws Mail is free.
    • Only Zero Mail lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Zero Mail is self-hostable, according to its own site.
    Zero Mail 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). Claws Mail is free.
    • Claws 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 macOS, iOS and Android apps.
    Inbox Zero pricing and details

  3. Cypht

    Open-source webmail that combines many accounts in one inbox

    • Cypht is free. Claws Mail is free.
    • Only Cypht lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Cypht is self-hostable, according to its own site.
    Cypht pricing and details

  4. Zimbra

    Self-hosted email, calendar and file sharing for organizations

    • Claws Mail has a free plan. Zimbra does not.
    • Only Zimbra lists a web app.
    • Only Zimbra lists macOS, iOS and Android apps.
    • Zimbra is self-hostable, according to its own site.
    Zimbra pricing and details

  5. Roundcube

    Free open-source webmail client you host yourself

    • Roundcube is free. Claws Mail is free.
    • Only Roundcube lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Roundcube is self-hostable, according to its own site.
    Roundcube pricing and details

  6. SOGo

    Open-source groupware with webmail, calendars and contacts

    • SOGo is free. Claws Mail is free.
    • Only SOGo lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • SOGo is self-hostable, according to its own site.
    SOGo pricing and details

  7. Open-Xchange

    OX App Suite email platform sold to providers and governments

    • Claws Mail has a free plan. Open-Xchange does not.
    • Only Open-Xchange lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Open-Xchange is self-hostable, according to its own site.
    Open-Xchange pricing and details

  8. Horde

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

    • Horde is free. Claws Mail is free.
    • Only Horde lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Horde is self-hostable, according to its own site.
    Horde pricing and details

  9. mailcow

    Dockerized open-source mail server with a web admin UI

    • mailcow is free. Claws Mail is free.
    • Only mailcow lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • mailcow is self-hostable, according to its own site.
    mailcow pricing and details

  10. Mail-in-a-Box

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

    • Mail-in-a-Box is free. Claws Mail is free.
    • Only Mail-in-a-Box lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Mail-in-a-Box is self-hostable, according to its own site.
    Mail-in-a-Box pricing and details

  11. 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). Claws Mail is free.
    • Only Stalwart Mail Server lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Stalwart Mail Server is self-hostable, according to its own site.
    Stalwart Mail Server pricing and details

  12. Mailu

    Free Docker-based mail server with webmail and admin UI

    • Mailu is free. Claws Mail is free.
    • Only Mailu lists a web app.
    • Only Claws Mail lists Linux and Windows apps.
    • Mailu is self-hostable, according to its own site.
    Mailu pricing and details

13 more that can be self-hosted

All 25 in one table

Common questions

Is there a self-hosted alternative to Claws Mail?

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

Can Claws Mail be self-hosted?

The Claws Mail listing does not say it can be self-hosted. The listing was checked on Nov 12, 2026 against the pages it cites.

Which of these email apps are free?

Zero Mail, Cypht, Roundcube, SOGo, Horde, mailcow, Mail-in-a-Box, Stalwart Mail Server 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 9, 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.