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mailbox alternatives · Email

Self-hosted alternatives to mailbox

The mailbox listing does not say it can be self-hosted. 6 of the 73 other email apps in this directory can be self-hosted, according to their own sites.

mailbox is a paid product with a free trial, starting at €1 per month, annual payment only (€12 a year, Light). 4 of them are free or have a free plan.

6 tools · Listings checked up to Nov 12, 2026 · Where the facts come from

How each one differs from mailbox

  1. Zimbra

    Self-hosted email, calendar and file sharing for organizations

    • Only Zimbra lists Windows, macOS, Linux, iOS and Android apps.
    • Zimbra is open source and self-hostable, according to its own site.
    • mailbox is end-to-end encrypted, according to its own site.
    • mailbox also covers documents, video calls and file sync.
    Zimbra vs mailboxZimbra 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). mailbox starts at €1 per month, annual payment only (€12 a year, Light).
    • Only Inbox Zero lists macOS, Windows, iOS and Android apps.
    • Only Inbox Zero lists a browser extension.
    • Inbox Zero is open source and self-hostable, according to its own site.
    Inbox Zero pricing and details

  3. Zero Mail

    Open-source AI email client that connects your existing inboxes

    • Zero Mail starts at $20 per month (billing basis not shown). mailbox starts at €1 per month, annual payment only (€12 a year, Light).
    • Zero Mail has a free plan. mailbox does not, though it has a free trial.
    • Zero Mail is open source and self-hostable, according to its own site.
    • mailbox is end-to-end encrypted, according to its own site.
    Zero Mail pricing and details

  4. Roundcube

    Free open-source webmail client you host yourself

    • Roundcube is free. mailbox starts at €1 per month, annual payment only (€12 a year, Light).
    • Roundcube has a free plan. mailbox does not, though it has a free trial.
    • Roundcube is open source and self-hostable, according to its own site.
    • mailbox is end-to-end encrypted, according to its own site.
    Roundcube pricing and details

  5. SimpleLogin

    Open-source email aliases that forward to your own inbox

    • SimpleLogin starts at $36 per year ($4 billed monthly). mailbox starts at €1 per month, annual payment only (€12 a year, Light).
    • SimpleLogin has a free plan. mailbox does not, though it has a free trial.
    • Only SimpleLogin lists iOS and Android apps.
    • Only SimpleLogin lists a browser extension.
    SimpleLogin pricing and details

  6. addy.io

    Email alias forwarding that hides your real address from sites

    • addy.io starts at $1 per month, billed yearly (Lite). mailbox starts at €1 per month, annual payment only (€12 a year, Light).
    • addy.io has a free plan. mailbox does not, though it has a free trial.
    • Only addy.io lists iOS and Android apps.
    • Only addy.io lists a browser extension.
    addy.io pricing and details

Common questions

Is there a self-hosted alternative to mailbox?

Yes. Zimbra, Inbox Zero, Zero Mail, Roundcube, SimpleLogin and addy.io can be self-hosted, according to their own sites.

Can mailbox be self-hosted?

The mailbox listing does not say it can be self-hosted. The listing was checked on Oct 6, 2026 against the pages it cites.

Which of these email apps are free?

Zero Mail, Roundcube, SimpleLogin and addy.io are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 6, 2026 to Nov 12, 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 mailbox: the alternatives its listing names first, then the tools that share the most features with it.