Proton Mail for Business vs 20i
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.
Proton Mail for Business or 20i: which should you choose?
- Choose Proton Mail for Business if you want end-to-end encryption built in; 15 GB of storage; and open-source apps anyone can check.
- Choose 20i if you want to read your mail in any app, such as Apple Mail, Outlook or Thunderbird.
| Feature | Proton Mail for Business | 20i |
|---|---|---|
| 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 | 10 GB |
| 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 | Unknown |
| Free trial | 30-day refund | Unknown |
| 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 | ✓ Yes |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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How Proton Mail for Business and 20i differ
- Proton Mail for Business's cheapest plan is Mail Essentials ($6.99 per user a month); 20i's is Email hosting (Not confirmed).
- Proton Mail for Business comes with 15 GB of storage and 20i with 10 GB of storage.
- Proton Mail for Business keeps your mail in Switzerland, while 20i keeps it in the United Kingdom.
- Proton Mail for Business is based in Switzerland and 20i in the United Kingdom, so different privacy laws apply.
- Proton Mail for Business encrypts mail end to end; 20i doesn't encrypt mail end to end.
- Proton Mail for Business works in other mail apps through Proton Bridge on paid plans, and 20i works in any mail app over IMAP.
Questions people ask
Which is more private, Proton Mail for Business or 20i?
Proton Mail for Business scores 4.5 out of 5 for privacy and 20i 2.5. Proton Mail for Business gives you end-to-end encryption built in and open-source apps anyone can check.
Do Proton Mail for Business and 20i work with my own domain?
Yes, both do. Proton Mail for Business: 3 domains on its cheapest plan that allows one. 20i: Yes.
Where do Proton Mail for Business and 20i keep my email?
Proton Mail for Business keeps it in Switzerland. 20i keeps it in the United Kingdom.
Do Proton Mail for Business and 20i work in other mail apps?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. 20i works in any mail app over IMAP.
Price changes and news
Neither price has changed since my first check on 22 October 2026.
The latest headlines: Proton Mail for Business news · 20i news.
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How to switch
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.