mailbox.org vs Proton Mail for Business
On privacy it's a tie. On price it's mailbox.org. On features it's mailbox.org. Here's everything side by side, last checked 22 October 2026.
mailbox.org or Proton Mail for Business: which should you choose?
- Go for mailbox.org if you'd like the lower price (€3 a month, yearly (from summer 2026)); more room (20 GB, against 15 GB); and freedom to use the mail app you already like.
- Proton Mail for Business suits you best if you want mail that's encrypted end to end without any setup.
| Feature | mailbox.org | Proton Mail for Business |
|---|---|---|
| Overall | 4.5 | 4.0 |
| Privacy | 4.5 | 4.5 |
| Price | 4.0 | 2.5 |
| Features | 5.0 | 4.5 |
| Cheapest plan | Standard €3 a month, yearly (from summer 2026) | Mail Essentials $6.99 per user a month |
| Free plan | No (30-day trial) | No |
| Storage | 20 GB | 15 GB |
| Your own domain | ✓ Yes | ✓ 3 |
| End-to-end encryption | Optional (PGP or encrypted storage) | ✓ Built in |
| Company based in | Germany | Switzerland |
| Your data is kept in | Germany | Switzerland |
| Founded | 2014 | 2014 |
| Free trial | 30 days free | 30-day refund |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | With Proton Bridge on paid plans |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | Yes | Yes |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | ✓ Yes | No |
| White label | No | No |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 22 October 2026 |
Want to add another? Open this in the compare tool.
How mailbox.org and Proton Mail for Business differ
- Cheapest plans: mailbox.org Standard, €3 a month, yearly (from summer 2026). Proton Mail for Business Mail Essentials, $6.99 per user a month.
- mailbox.org has no free plan; Proton Mail for Business has no free plan.
- Space: mailbox.org gives 20 GB of storage, Proton Mail for Business 15 GB of storage.
- Data location: Germany for mailbox.org, Switzerland for Proton Mail for Business.
- The companies sit under different laws: mailbox.org in Germany, Proton Mail for Business in Switzerland.
- On encryption, mailbox.org offers optional encryption (PGP or encrypted storage), whereas Proton Mail for Business encrypts mail end to end.
- Mail apps: mailbox.org works in any mail app over IMAP; Proton Mail for Business works in other mail apps through Proton Bridge on paid plans.
mailbox.org and Proton Mail for Business: your questions
Is mailbox.org more private than Proton Mail for Business?
They score the same for privacy: 4.5 out of 5 each. The differences are in the details, such as where your mail is kept (Germany for mailbox.org, Switzerland for Proton Mail for Business).
Is mailbox.org cheaper than Proton Mail for Business?
mailbox.org is cheaper. Its Standard plan is €3 a month, yearly (from summer 2026), against $6.99 per user a month for Proton Mail for Business's Mail Essentials. Check the renewal price before you pay, as some first-year prices go up.
Can I use my own domain with mailbox.org or Proton Mail for Business?
Yes, both do. mailbox.org: Yes. Proton Mail for Business: 3 domains on its cheapest plan that allows one.
Where is my email stored with mailbox.org and Proton Mail for Business?
mailbox.org keeps it in Germany. Proton Mail for Business keeps it in Switzerland.
Can I use mailbox.org and Proton Mail for Business in Apple Mail or Outlook?
mailbox.org works in any mail app over IMAP. Proton Mail for Business works in other mail apps through Proton Bridge on paid plans.
Prices and the latest news
- 1 September 2026 mailbox.org: €3.00 (announced 15 July 2026)
- 1 June 2026 mailbox.org: €2.50
The latest headlines: mailbox.org news · Proton Mail for Business news.
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Moving your email
Moving to mailbox.org · Moving from mailbox.org. Or see all my switching guides.