Proton Mail for Business vs addy.io
In short: Proton Mail for Business wins on privacy, addy.io wins on price, and Proton Mail for Business wins on features. The full comparison is below, last checked 25 October 2026.
Proton Mail for Business or addy.io: which should you choose?
- Proton Mail for Business suits you best if you want mail that's encrypted end to end without any setup; more room (15 GB, against none); and a calendar and contacts alongside your mail.
- Go for addy.io if you'd like the lower price (About $1 a month, yearly); a free plan to start on; and sign-up without ID.
| Feature | Proton Mail for Business | addy.io |
|---|---|---|
| Overall | 4.0 | 4.0 |
| Privacy | 4.5 | 3.5 |
| Price | 2.5 | 5.0 |
| Features | 4.5 | Not rated |
| Cheapest plan | Mail Essentials $6.99 per user a month | Lite About $1 a month, yearly |
| Free plan | No | Yes |
| Storage | 15 GB | Forwards only |
| Your own domain | ✓ 3 | ✓ Yes |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | United Kingdom |
| Your data is kept in | Switzerland | EU |
| Founded | 2014 | 2018 |
| Free trial | 30-day refund | Free plan |
| Funded by advertising | No | No |
| Works in any mail app | With Proton Bridge on paid plans | No, its own apps only |
| Calendar and contacts | ✓ Yes | No |
| Aliases | Yes | Unlimited aliases |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | No | ✓ Yes |
| White label | No | No |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
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The key differences
- On price: Proton Mail for Business Mail Essentials at $6.99 per user a month, against addy.io Lite at About $1 a month, yearly.
- Proton Mail for Business has no free plan; addy.io has a free plan ().
- Space: Proton Mail for Business gives 15 GB of storage, addy.io no storage, as it forwards mail on.
- Proton Mail for Business keeps your mail in Switzerland, while addy.io keeps it in the EU.
- The companies sit under different laws: Proton Mail for Business in Switzerland, addy.io in United Kingdom.
- On encryption, Proton Mail for Business encrypts mail end to end, whereas addy.io doesn't encrypt mail end to end.
- Mail apps: Proton Mail for Business works in other mail apps through Proton Bridge on paid plans; addy.io only works in its own apps.
- Aliases: Proton Mail for Business offers yes, addy.io unlimited aliases.
Proton Mail for Business and addy.io: your questions
Is Proton Mail for Business more private than addy.io?
Proton Mail for Business scores 4.5 out of 5 for privacy and addy.io 3.5. Proton Mail for Business gives you mail that's encrypted end to end without any setup.
Is Proton Mail for Business cheaper than addy.io?
addy.io is cheaper. Its Lite plan is About $1 a month, yearly, against $6.99 per user a month for Proton Mail for Business's Mail Essentials. addy.io also has a free plan. Check the renewal price before you pay, as some first-year prices go up.
Can I use my own domain with Proton Mail for Business or addy.io?
Yes, both do. Proton Mail for Business: 3 domains on its cheapest plan that allows one. addy.io: Yes.
Where is my email stored with Proton Mail for Business and addy.io?
Proton Mail for Business keeps it in Switzerland. addy.io keeps it in the EU.
Can I use Proton Mail for Business and addy.io in Apple Mail or Outlook?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. addy.io only works in its own apps.
Price changes and 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 · addy.io news.
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Proton Mail for Business vs mailbox.org · addy.io vs mailbox.org · Proton Mail for Business vs Posteo · addy.io vs Posteo · Proton Mail for Business vs Proton Mail · addy.io vs Proton Mail
Switching between them
Moving between any two providers works the same way. Pick your two providers for the steps.