Proton Mail for Business vs Krystal
On privacy it's Proton Mail for Business. On price it's Proton Mail for Business. On features it's a tie. Here's everything side by side, last checked 25 October 2026.
Which should you choose?
- Proton Mail for Business is the better pick if you want end-to-end encryption built in and open-source apps anyone can check.
- Choose Krystal if you want to read your mail in any app, such as Apple Mail, Outlook or Thunderbird and a provider that's been going since 2002.
| Feature | Proton Mail for Business | Krystal |
|---|---|---|
| Overall | 4.0 | Not rated |
| Privacy | 4.5 | 2.5 |
| Price | 2.5 | Not rated |
| Features | 4.5 | 4.5 |
| Cheapest plan | Mail Essentials $6.99 per user a month | Email hosting Not confirmed |
| Free plan | No | No |
| Storage | 15 GB | Not confirmed |
| Your own domain | ✓ 3 | ✓ Yes |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | United Kingdom |
| Your data is kept in | Switzerland | United Kingdom |
| Founded | 2014 | 2002 |
| Free trial | 30-day refund | 60-day money-back guarantee |
| Funded by advertising | No | No |
| Works in any mail app | With Proton Bridge on paid plans | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | Yes | Yes |
| Open-source apps | ✓ Yes | No |
| Sign up without ID | No | No |
| White label | No | Unknown |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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How Proton Mail for Business and Krystal differ
- On price: Proton Mail for Business Mail Essentials at $6.99 per user a month, against Krystal Email hosting at Not confirmed.
- Space: Proton Mail for Business gives 15 GB of storage, Krystal storage not confirmed.
- Data location: Switzerland for Proton Mail for Business, United Kingdom for Krystal.
- The companies sit under different laws: Proton Mail for Business in Switzerland, Krystal in United Kingdom.
- On encryption, Proton Mail for Business encrypts mail end to end, whereas Krystal doesn't encrypt mail end to end.
- Mail apps: Proton Mail for Business works in other mail apps through Proton Bridge on paid plans; Krystal works in any mail app over IMAP.
Proton Mail for Business and Krystal: your questions
Is Proton Mail for Business more private than Krystal?
Proton Mail for Business scores 4.5 out of 5 for privacy and Krystal 2.5. Proton Mail for Business gives you end-to-end encryption built in and open-source apps anyone can check.
Can I use my own domain with Proton Mail for Business or Krystal?
Yes, both do. Proton Mail for Business: 3 domains on its cheapest plan that allows one. Krystal: Yes.
Where is my email stored with Proton Mail for Business and Krystal?
Proton Mail for Business keeps it in Switzerland. Krystal keeps it in the United Kingdom.
Can I use Proton Mail for Business and Krystal in Apple Mail or Outlook?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. Krystal 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 · Krystal news.
Alternatives to Proton Mail for Business and Krystal
Proton Mail for Business vs mailbox.org · Krystal vs mailbox.org · Proton Mail for Business vs Posteo · Krystal vs Posteo · Proton Mail for Business vs Proton Mail · Krystal vs Proton Mail
Switching between them
Moving between any two providers works the same way. Pick your two providers for the steps.