Proton Mail for Business vs GMX
Proton Mail for Business wins on privacy, GMX wins on price and Proton Mail for Business wins on features. Every fact below was checked on or before 25 October 2026.
Which should you choose?
- Proton Mail for Business suits you best if you want encryption that means even the provider can't read your mail; a company that isn't funded by advertising; and to use your own domain, like you@yourname.co.uk.
- Choose GMX if you want email without paying for it; a free plan to start on; and more space for your mail: 65 GB.
| Feature | Proton Mail for Business | GMX |
|---|---|---|
| Overall | 4.0 | 3.5 |
| Privacy | 4.5 | 2.0 |
| Price | 2.5 | 5.0 |
| Features | 4.5 | 4.0 |
| Cheapest plan | Mail Essentials $6.99 per user a month | Free Free (paid plans only for German and Austrian residents) |
| Free plan | No | Yes, with adverts |
| Storage | 15 GB | 65 GB |
| Your own domain | ✓ 3 | No |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | Germany |
| Your data is kept in | Switzerland | Germany (European data centres) |
| Founded | 2014 | 1997 |
| Free trial | 30-day refund | Free |
| Funded by advertising | No | Yes, or its parent company is |
| Works in any mail app | With Proton Bridge on paid plans | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | Yes | Up to 10 addresses |
| Open-source apps | ✓ Yes | No |
| Sign up without ID | No | No |
| White label | No | No |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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How Proton Mail for Business and GMX differ
- Cheapest plans: Proton Mail for Business Mail Essentials, $6.99 per user a month. GMX Free, Free (paid plans only for German and Austrian residents).
- Proton Mail for Business has no free plan; GMX has a free plan (with adverts).
- Space: Proton Mail for Business gives 15 GB of storage, GMX 65 GB of storage.
- Proton Mail for Business keeps your mail in Switzerland, while GMX keeps it in Germany (European data centres).
- The companies sit under different laws: Proton Mail for Business in Switzerland, GMX in Germany.
- On encryption, Proton Mail for Business encrypts mail end to end, whereas GMX doesn't encrypt mail end to end.
- You can use your own domain with Proton Mail for Business, but not with GMX.
- Mail apps: Proton Mail for Business works in other mail apps through Proton Bridge on paid plans; GMX works in any mail app over IMAP.
- GMX (or its parent company) makes money from advertising; Proton Mail for Business doesn't.
- Aliases: Proton Mail for Business offers yes, GMX up to 10 addresses.
Proton Mail for Business and GMX: your questions
Is Proton Mail for Business more private than GMX?
Proton Mail for Business scores 4.5 out of 5 for privacy and GMX 2. Proton Mail for Business gives you encryption that means even the provider can't read your mail, a company that isn't funded by advertising and open-source apps.
Is Proton Mail for Business cheaper than GMX?
GMX costs nothing to start (Free (paid plans only for German and Austrian residents)). Proton Mail for Business's cheapest plan, Mail Essentials, is $6.99 per user a month.
Can I use my own domain with Proton Mail for Business or GMX?
Only Proton Mail for Business does (3 domains on its cheapest plan that allows one). With GMX your address stays on its own domain.
Where is my email stored with Proton Mail for Business and GMX?
Proton Mail for Business keeps it in Switzerland. GMX keeps it in Germany (European data centres).
Can I use Proton Mail for Business and GMX in Apple Mail or Outlook?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. GMX works in any mail app over IMAP.
Prices and the latest news
I haven't seen either change its price since I started checking on 22 October 2026.
The latest headlines: Proton Mail for Business news · GMX news.
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