Proton Mail for Business vs Maddy
In short: Proton Mail for Business wins on privacy, Proton Mail for Business wins on price, and Proton Mail for Business wins on features. The full comparison is below, last checked 25 October 2026.
Which should you choose?
- Choose Proton Mail for Business if you want encryption that means even the provider can't read your mail; your mailbox stored in Switzerland; and your diary and address book in one place with your email.
- Choose Maddy if you want a free plan before you pay anything and to read your mail in any app, such as Apple Mail, Outlook or Thunderbird.
| Feature | Proton Mail for Business | Maddy |
|---|---|---|
| Overall | 4.0 | Not rated |
| Privacy | 4.5 | Not rated |
| Price | 2.5 | Not rated |
| Features | 4.5 | Not rated |
| Cheapest plan | Mail Essentials $6.99 per user a month | Open source Free |
| Free plan | No | Yes, open source |
| Storage | 15 GB | Not confirmed |
| Your own domain | ✓ 3 | ✓ Yes |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | Not confirmed |
| Your data is kept in | Switzerland | Your own server |
| Founded | 2014 | Unknown |
| Free trial | 30-day refund | Free to download |
| Funded by advertising | No | No |
| Works in any mail app | With Proton Bridge on paid plans | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | No |
| Aliases | Yes | Yes |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | No | No |
| White label | No | Unknown |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
The key differences
- Cheapest plans: Proton Mail for Business Mail Essentials, $6.99 per user a month. Maddy Open source, Free.
- For free, Proton Mail for Business gives you no free plan, and Maddy a free plan (open source).
- Proton Mail for Business comes with 15 GB of storage and Maddy with storage not confirmed.
- Your mail is stored in Switzerland with Proton Mail for Business, and in Your own server with Maddy.
- Proton Mail for Business is based in Switzerland and Maddy in Not confirmed, so different privacy laws apply.
- Proton Mail for Business encrypts mail end to end; Maddy doesn't encrypt mail end to end.
- Proton Mail for Business works in other mail apps through Proton Bridge on paid plans, and Maddy works in any mail app over IMAP.
Questions people ask
Do Proton Mail for Business and Maddy work with my own domain?
Yes, both do. Proton Mail for Business: 3 domains on its cheapest plan that allows one. Maddy: Yes.
Where do Proton Mail for Business and Maddy keep my email?
Proton Mail for Business keeps it in Switzerland. Maddy keeps it in Your own server.
Do Proton Mail for Business and Maddy work in other mail apps?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. Maddy works in any mail app over IMAP.
Recent price changes
Neither price has changed since my first check on 22 October 2026.
The latest headlines: Proton Mail for Business news · Maddy news.
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Moving your email
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.