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Alternatives · Email

Firefox Relay alternatives

As of Nov 13, 2026, the best Firefox Relay alternative for most people is Proton Mail (3.0 GPA), third in our ranking of email apps. It's also the best free one.

Firefox Relay compared with 4 alternatives: SimpleLogin, addy.io, ImprovMX and Proton Mail.

Firefox Relay has a free plan. All 4 alternatives are free or have a free plan.

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

Black Friday: is there a Firefox Relay sale?

At a glance

ToolPriceFree planRuns on
Firefox RelayThis toolFree planYesWeb, Browser extension
SimpleLoginFree plan · from $36/yrYesWeb, iOS, Android, Browser extension
addy.ioFree plan · from $1/moYesWeb, iOS, Android, Browser extension
ImprovMXFree plan · from $50/yrYesWeb
Proton MailFree plan · from $3.99/moYesWeb, macOS, Windows, Linux, iOS, Android

How each one differs from Firefox Relay

  1. SimpleLogin

    Open-source email aliases that forward to your own inbox

    • SimpleLogin starts at $36 per year ($4 billed monthly).
    • SimpleLogin also lists iOS and Android apps.
    • SimpleLogin is open source and self-hostable, according to its own site.
    • SimpleLogin does not cover inbox filtering and ad and tracker blocking, which Firefox Relay does.

    Suits: People who want per-site addresses and a Proton-run service

    SimpleLogin vs Firefox RelaySimpleLogin pricing and details

  2. addy.io

    Email alias forwarding that hides your real address from sites

    • addy.io starts at $1 per month, billed yearly (Lite).
    • addy.io also lists iOS and Android apps.
    • addy.io is open source and self-hostable, according to its own site.
    • addy.io does not cover inbox filtering and ad and tracker blocking, which Firefox Relay does.

    Suits: People who want one address per website to trace and cut off spam

    addy.io vs Firefox Relayaddy.io pricing and details

  3. ImprovMX

    Email forwarding and sending for custom domains

    • ImprovMX starts at $50 per year (Light, up to 5 domains).
    • ImprovMX lists no browser extension, which Firefox Relay has.
    • ImprovMX also covers transactional email.
    • ImprovMX does not cover ad and tracker blocking, which Firefox Relay does.

    Suits: Side projects and small sites that need addresses on a custom domain without hosting a mailbox

    ImprovMX vs Firefox RelayImprovMX pricing and details

  4. 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.
    • Proton Mail also lists macOS, Windows, Linux, iOS and Android apps.
    • Proton Mail lists no browser extension, which Firefox Relay has.
    • Proton Mail is open source and end-to-end encrypted, according to its own site.
    • Proton Mail also covers calendar and email client.

    Suits: People who want an email provider that cannot read their messages

    Proton Mail vs Firefox RelayProton Mail pricing and details

Limits worth knowing in Firefox Relay

  • Premium and phone plans show no price and a Join the Waitlist button, so only the free plan can be signed up for.
  • The free plan stops at 5 masks and cannot reply from a mask; masks go to your existing inbox.
  • Mozilla advises against masks for banks, doctors, lawyers and mail with attachments you must receive.
  • Relay Premium is limited to listed countries, including the US, Canada, the UK and most of the EU.
Firefox Relay pricing and details

Common questions

What are the alternatives to Firefox Relay?

The alternatives to Firefox Relay in this directory are SimpleLogin, addy.io, ImprovMX and Proton Mail. Each one has a side-by-side comparison with Firefox Relay.

Is there a free alternative to Firefox Relay?

Yes. SimpleLogin, addy.io, ImprovMX and Proton Mail have a free plan alongside paid ones.

Which Firefox Relay alternatives work on Windows?

The Firefox Relay listing does not include a Windows app. Proton Mail lists one.

Which Firefox Relay alternatives work on macOS?

The Firefox Relay listing does not include a macOS app. Proton Mail lists one.

Is there an open-source alternative to Firefox Relay?

SimpleLogin, addy.io and Proton Mail are described as open source on their own sites.

When were these prices checked?

Each listing shows its own date. On this page they run from Oct 4, 2026 to Nov 12, 2026. Vendors change prices without notice, so confirm on their site before you buy.

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