Skip to content
ToolGPA

Proton Mail alternatives · Email

Self-hosted alternatives to Proton Mail

The Proton Mail 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.

Proton Mail has a free plan. Paid plans start at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. 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 Proton Mail

  1. addy.io

    Email alias forwarding that hides your real address from sites

    • addy.io starts at $1 per month, billed yearly (Lite). Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only addy.io lists a browser extension.
    • Only Proton Mail lists macOS, Windows and Linux apps.
    • addy.io is self-hostable, according to its own site.
    addy.io vs Proton Mailaddy.io pricing and details

  2. Zimbra

    Self-hosted email, calendar and file sharing for organizations

    • Proton Mail has a free plan. Zimbra does not.
    • Zimbra is self-hostable, according to its own site.
    • Proton Mail is end-to-end encrypted, according to its own site.
    • Zimbra also covers tasks.
    Zimbra pricing and details

  3. Inbox Zero

    Open source AI email assistant for Gmail and Outlook

    • Inbox Zero starts at $18 per user / month, billed annually ($20 billed monthly). Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Proton Mail has a free plan. Inbox Zero does not, though it has a free trial.
    • Only Inbox Zero lists a browser extension.
    • Only Proton Mail lists a Linux app.
    Inbox Zero pricing and details

  4. Zero Mail

    Open-source AI email client that connects your existing inboxes

    • Zero Mail starts at $20 per month (billing basis not shown). Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
    • Zero Mail is self-hostable, according to its own site.
    • Proton Mail is end-to-end encrypted, according to its own site.
    Zero Mail pricing and details

  5. Roundcube

    Free open-source webmail client you host yourself

    • Roundcube is free. Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
    • Roundcube is self-hostable, according to its own site.
    • Proton Mail is end-to-end encrypted, according to its own site.
    Roundcube pricing and details

  6. SimpleLogin

    Open-source email aliases that forward to your own inbox

    • SimpleLogin starts at $36 per year ($4 billed monthly). Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only SimpleLogin lists a browser extension.
    • Only Proton Mail lists macOS, Windows and Linux apps.
    • SimpleLogin is self-hostable, according to its own site.
    SimpleLogin pricing and details

Common questions

Is there a self-hosted alternative to Proton Mail?

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

Can Proton Mail be self-hosted?

The Proton 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?

addy.io, Zero Mail, Roundcube and SimpleLogin 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 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 Proton Mail: the alternatives its listing names first, then the tools that share the most features with it.