Runbox vs Proton Mail for Business
On privacy it's Proton Mail for Business. On price it's Runbox. On features it's a tie. Here's everything side by side, last checked 22 October 2026.
Should you pick Runbox or Proton Mail for Business?
- Go for Runbox if you'd like a cheaper plan, at $34.95 a year; to read your mail in any app, such as Apple Mail, Outlook or Thunderbird; and features the other lacks, like POP3 as well as CalDAV and CardDAV sync.
- Proton Mail for Business suits you best if you want mail that's encrypted end to end without any setup and 15 GB of storage.
| Feature | Runbox | Proton Mail for Business |
|---|---|---|
| Overall | 3.5 | 4.0 |
| Privacy | 3.0 | 4.5 |
| Price | 4.0 | 2.5 |
| Features | 4.5 | 4.5 |
| Cheapest plan | Mini $34.95 a year | Mail Essentials $6.99 per user a month |
| Free plan | No (30-day trial) | No |
| Storage | 10 GB | 15 GB |
| Your own domain | ✓ Up to 5 | ✓ 3 |
| End-to-end encryption | No | ✓ Built in |
| Company based in | Norway | Switzerland |
| Your data is kept in | Norway | Switzerland |
| Founded | 2000 | 2014 |
| Free trial | 30 days free, then a 60-day refund | 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 | 100 aliases | Yes |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | No | 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.
Where they differ
- On price: Runbox Mini at $34.95 a year, against Proton Mail for Business Mail Essentials at $6.99 per user a month.
- Runbox has no free plan; Proton Mail for Business has no free plan.
- Space: Runbox gives 10 GB of storage, Proton Mail for Business 15 GB of storage.
- Your mail is stored in Norway with Runbox, and in Switzerland with Proton Mail for Business.
- The companies sit under different laws: Runbox in Norway, Proton Mail for Business in Switzerland.
- On encryption, Runbox doesn't encrypt mail end to end, whereas Proton Mail for Business encrypts mail end to end.
- Mail apps: Runbox works in any mail app over IMAP; Proton Mail for Business works in other mail apps through Proton Bridge on paid plans.
- Aliases: Runbox offers 100 aliases, Proton Mail for Business yes.
Common questions
Is Runbox more private than Proton Mail for Business?
Proton Mail for Business scores 4.5 out of 5 for privacy and Runbox 3. Proton Mail for Business gives you mail that's encrypted end to end without any setup.
Is Runbox cheaper than Proton Mail for Business?
Runbox is cheaper. Its Mini plan is $34.95 a year, 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 Runbox or Proton Mail for Business?
Yes, both do. Runbox: Up to 5. Proton Mail for Business: 3 domains on its cheapest plan that allows one.
Where is my email stored with Runbox and Proton Mail for Business?
Runbox keeps it in Norway. Proton Mail for Business keeps it in Switzerland.
Can I use Runbox and Proton Mail for Business in Apple Mail or Outlook?
Runbox works in any mail app over IMAP. Proton Mail for Business works in other mail apps through Proton Bridge on paid plans.
Price changes and news
No price changes for either since 22 October 2026. I check regularly and add any change here with its date.
The latest headlines: Runbox news · Proton Mail for Business news.
Not sold on either? Try these
Runbox vs mailbox.org · Proton Mail for Business vs mailbox.org · Runbox vs Posteo · Proton Mail for Business vs Posteo · Runbox vs Proton Mail · Proton Mail for Business vs Proton Mail
Switching between them
Moving to Runbox · Moving from Runbox. Or see all my switching guides.