GMX vs Firefox Relay
In short: GMX wins on privacy, they tie on price, and GMX wins on features. The full comparison is below, last checked 25 October 2026.
Which should you choose?
- GMX is the better pick if you want your mailbox stored in Germany (European data centres); a mailbox that costs nothing; and more room (65 GB, against none).
- Firefox Relay is the better pick if you want a provider with no advertising business behind it and apps whose code is public.
| Feature | GMX | Firefox Relay |
|---|---|---|
| Overall | 3.5 | 2.5 |
| Privacy | 2.0 | 1.0 |
| Price | 5.0 | 5.0 |
| Features | 4.0 | Not rated |
| Cheapest plan | Free Free (paid plans only for German and Austrian residents) | Premium $0.99 a month |
| Free plan | Yes, with adverts | Yes, 5 aliases |
| Storage | 65 GB | Forwards only |
| Your own domain | No | Own subdomain only |
| End-to-end encryption | No | No |
| Company based in | Germany | United States (Mozilla) |
| Your data is kept in | Germany (European data centres) | United States |
| Founded | 1997 | 2020 |
| Free trial | Free | Free plan |
| Funded by advertising | Yes, or its parent company is | No |
| Works in any mail app | ✓ IMAP and SMTP | No, its own apps only |
| Calendar and contacts | ✓ Yes | No |
| Aliases | Up to 10 addresses | Unlimited aliases |
| Open-source apps | No | ✓ Yes |
| Sign up without ID | No | No |
| White label | No | No |
| Reader offer | None | None |
| Last checked | 25 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
How GMX and Firefox Relay differ
- GMX's cheapest plan is Free (Free (paid plans only for German and Austrian residents)); Firefox Relay's is Premium ($0.99 a month).
- For free, GMX gives you a free plan (with adverts), and Firefox Relay a free plan (5 aliases).
- GMX comes with 65 GB of storage and Firefox Relay with no storage, as it forwards mail on.
- Your mail is stored in Germany (European data centres) with GMX, and in the United States with Firefox Relay.
- GMX is based in Germany and Firefox Relay in the United States (Mozilla), so different privacy laws apply.
- GMX works in any mail app over IMAP, and Firefox Relay only works in its own apps.
- Only GMX is part of an advertising business.
- For extra addresses, GMX has up to 10 addresses and Firefox Relay has unlimited aliases.
GMX and Firefox Relay: your questions
Which is more private, GMX or Firefox Relay?
GMX scores 2 out of 5 for privacy and Firefox Relay 1. GMX gives you your mailbox stored in Germany (European data centres).
Which is cheaper, GMX or Firefox Relay?
GMX costs nothing to start (Free (paid plans only for German and Austrian residents)). Firefox Relay's cheapest plan, Premium, is $0.99 a month. Firefox Relay has a free plan too: 5 aliases.
Do GMX and Firefox Relay work with my own domain?
No, neither lets you use your own domain, so your address stays on theirs.
Where do GMX and Firefox Relay keep my email?
GMX keeps it in Germany (European data centres). Firefox Relay keeps it in the United States.
Do GMX and Firefox Relay work in other mail apps?
GMX works in any mail app over IMAP. Firefox Relay only works in its own apps.
Prices and the latest news
I haven't seen either change its price since I started checking on 25 October 2026.
The latest headlines: GMX news · Firefox Relay news.
Not sold on either? Try these
GMX vs mailbox.org · Firefox Relay vs mailbox.org · GMX vs Posteo · Firefox Relay vs Posteo · GMX vs Proton Mail · Firefox Relay vs Proton Mail
Moving your email
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.