Fastmail for Business vs GMX
They tie on privacy, GMX wins on price and Fastmail for Business wins on features. Every fact below was checked on or before 25 October 2026.
Should you pick Fastmail for Business or GMX?
- Fastmail for Business suits you best if you want a provider with no advertising business behind it and to use your own domain, like you@yourname.co.uk.
- GMX is the better pick if you want a mailbox that costs nothing; a free plan to start on; and more space for your mail: 65 GB.
| Feature | Fastmail for Business | GMX |
|---|---|---|
| Overall | 3.0 | 3.5 |
| Privacy | 2.0 | 2.0 |
| Price | 3.5 | 5.0 |
| Features | 5.0 | 4.0 |
| Cheapest plan | Standard $5 per user a month ($4.17 yearly) | Free Free (paid plans only for German and Austrian residents) |
| Free plan | No | Yes, with adverts |
| Storage | 50 GB | 65 GB |
| Your own domain | ✓ Up to 100 | No |
| End-to-end encryption | No | No |
| Company based in | Australia | Germany |
| Your data is kept in | EU (Amsterdam) for UK customers, with a US replica and US backups | Germany (European data centres) |
| Founded | 1999 | 1997 |
| Free trial | 30 days free | Free |
| Funded by advertising | No | Yes, or its parent company is |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | Yes | Up to 10 addresses |
| Open-source apps | No | No |
| Sign up without ID | No | No |
| White label | No | No |
| Reader offer | Offer 10% off your first year, plus a free trial of up to 30 days | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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The key differences
- Fastmail for Business's cheapest plan is Standard ($5 per user a month ($4.17 yearly)); GMX's is Free (Free (paid plans only for German and Austrian residents)).
- For free, Fastmail for Business gives you no free plan, and GMX a free plan (with adverts).
- Fastmail for Business comes with 50 GB of storage and GMX with 65 GB of storage.
- Data location: EU (Amsterdam) for UK customers, with a US replica and US backups for Fastmail for Business, Germany (European data centres) for GMX.
- Fastmail for Business is based in Australia and GMX in Germany, so different privacy laws apply.
- Fastmail for Business lets you bring your own domain name; GMX doesn't.
- Only GMX is part of an advertising business.
- For extra addresses, Fastmail for Business has yes and GMX has up to 10 addresses.
Fastmail for Business and GMX: your questions
Which is more private, Fastmail for Business or GMX?
They score the same for privacy: 2 out of 5 each. The differences are in the details, such as where your mail is kept (the EU (Amsterdam) for UK customers, with a US replica and US backups for Fastmail for Business, Germany (European data centres) for GMX).
Which is cheaper, Fastmail for Business or GMX?
GMX costs nothing to start (Free (paid plans only for German and Austrian residents)). Fastmail for Business's cheapest plan, Standard, is $5 per user a month ($4.17 yearly).
Do Fastmail for Business and GMX work with my own domain?
Only Fastmail for Business does (Up to 100). With GMX your address stays on its own domain.
Where do Fastmail for Business and GMX keep my email?
Fastmail for Business keeps it in the EU (Amsterdam) for UK customers, with a US replica and US backups. GMX keeps it in Germany (European data centres).
Price changes and news
I haven't seen either change its price since I started checking on 22 October 2026.
The latest headlines: Fastmail for Business news · GMX news.
Also worth a look
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Switching between them
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.