# Alternatives to Firefox Relay Mozilla's email masks. Firefox Relay ranks #4 of 10 in Email alias services, with an Alt Score of 75. It is licensed under MPL-2.0 and freemium. 7 of 9 checklist rows are verified against a public source. Source: https://altcatalog.com/alternatives/firefox-relay/ Category: Email alias services ## Overview - **Who it's for**: People who want to sign up for websites, newsletters, or apps without exposing their real email or phone number, and who want to cut down on spam and tracker exposure. - **What you get**: Relay generates random email masks (and phone masks on paid plans) that forward messages to your real inbox without revealing your actual address. The free plan includes up to 5 email masks, a browser extension, and tracker removal in forwarded emails. Premium adds unlimited masks, a custom @yourdomain relay address for creating masks on the fly, phone number masking, and the ability to reply anonymously through a mask. - **How it works**: You generate a mask (a random email address or, on paid tiers, a phone number) and give it out instead of your real contact info; anything sent to the mask is forwarded to your real inbox/phone, and you can disable or delete individual masks anytime from your dashboard to stop unwanted senders. ## Profile - **License**: MPL-2.0 (verified 2026-07-08) - **Pricing model**: Freemium (verified 2026-07-08) - **Starts at**: ? - **Platforms**: ? - **Status**: active (verified 2026-07-08) ## Ranked alternatives | # | App | Alt Score | Licence | Platforms | |---|-----|-----------|---------|-----------| | 1 | [SimpleLogin](https://altcatalog.com/alternatives/simplelogin.md) | 100 | AGPL-3.0 | Web, Browser extension, iOS, Android | | 2 | [addy.io](https://altcatalog.com/alternatives/addyio.md) | 90 | AGPL-3.0 | Web, iOS, Android, Browser extension | | 3 | [Forward Email](https://altcatalog.com/alternatives/forward-email.md) | 90 | BUSL-1.1 | Windows, macOS, Linux, iOS | | 4 | [33mail](https://altcatalog.com/alternatives/33mail.md) | 60 | ? | Web | | 5 | [AliasVault](https://altcatalog.com/alternatives/aliasvault.md) | 60 | AGPL-3.0 | Windows, macOS, Linux, iOS | | 6 | [ImprovMX](https://altcatalog.com/alternatives/improvmx.md) | 55 | Proprietary | Web | | 7 | [Apple Hide My Email](https://altcatalog.com/alternatives/apple-hide-my-email.md) | 45 | Proprietary | iOS, macOS, Web | | 8 | [DuckDuckGo Email Protection](https://altcatalog.com/alternatives/duckduckgo-email-protection.md) | 40 | Proprietary | Web, Browser extension, iOS, Android | | 9 | [Burner Mail](https://altcatalog.com/alternatives/burnermail.md) | 30 | ? | Web, Browser extension | Alt Score = Verified coverage (90%) + Visibility (10%). See https://altcatalog.com/how-alt-score-works/ ## Feature comparison Legend: Yes / No / Partial / ? (not verified). | Email alias services checklist | Firefox Relay | SimpleLogin | addy.io | Forward Email | 33mail | AliasVault | |---|---|---|---|---|---|---| | Pricing model | Freemium | Freemium | Freemium | Freemium | Freemium | Freemium | | Starts at | ? | $36/year | ? | $3/mo | $1/mo | Free | | License | MPL-2.0 | AGPL-3.0 | AGPL-3.0 | BUSL-1.1 | ? | AGPL-3.0 | | Platforms | ? | Web, Browser extension, iOS, Android | Web, iOS, Android, Browser extension | Windows, macOS, Linux, iOS, Android, Web | Web | Windows, macOS, Linux, iOS, Android, Web, Browser extension | | Unlimited aliases (paid) | Yes | Yes | Yes | Yes | Yes | Partial | | Custom domains | Yes | Yes | Yes | Yes | Yes | Partial | | Reply from alias | Yes | Yes | Yes | Yes | Yes | No | | Browser extension | Yes | Yes | Yes | No | ? | Yes | | Self-hostable | Partial | Yes | Yes | Yes | ? | Yes | | Open source | Yes | Yes | Yes | Yes | ? | Yes | | PGP encryption | ? | Yes | ? | Yes | ? | No | | Free tier limits | Yes | Yes | Yes | Yes | Yes | Yes | | Catch-all support | ? | Yes | Yes | Yes | Yes | ? | ## Sources Sources for Firefox Relay. Each alternative is sourced on its own page. - **License**: MPL-2.0 — (verified 2026-07-08) - Quote: “Mozilla Public License Version 2.0” - **Pricing model**: Freemium — (verified 2026-07-08) - Quote: “If you have more than ⁨5⁩ masks in total, you will not be able to create any more. You'll also lose the ability to reply to forwarded messages. You can resubscribe to ⁨Relay Premium⁩ and regain access” - **Status**: active — (verified 2026-07-08) - Note: Actively developed Mozilla project. - Quote: “License: MPL 2.0” - **Unlimited aliases (paid)**: Yes — (verified 2026-07-08) - Note: Free capped at 5 masks; Relay Premium removes the cap (unlimited). - Quote: “If you have more than ⁨5⁩ masks in total, you will not be able to create any more. … You can resubscribe to ⁨Relay Premium⁩ and regain access to these features.” - **Custom domains**: Yes — (verified 2026-07-08) - Quote: “Custom email subdomains, available to ⁨Relay Premium⁩ subscribers, allow you to generate easier-to-remember email masks.” - **Reply from alias**: Yes — (verified 2026-07-08) - Quote: “⁨Relay Premium⁩ users can reply to a forwarded email within 3 months of receiving the email.” - **Browser extension**: Yes — (verified 2026-07-08) - Quote: “Firefox Relay lets you generate email aliases that forward to your real inbox.” - **Self-hostable**: Partial — (verified 2026-07-08) - Note: Code is public and runnable locally, but Mozilla offers no supported self-hosting path. - Quote: “Running the add-on locally allows it to communicate with your local server (`127.0.0.1:8000`) instead of the production server (`relay.firefox.com`).” - **Open source**: Yes — (verified 2026-07-08) - Quote: “Mozilla Public License Version 2.0” - **Free tier limits**: Yes — (verified 2026-07-08) - Quote: “If you have more than ⁨5⁩ masks in total, you will not be able to create any more.” --- Ranked by verified data, never by who paid. https://altcatalog.com/trust/