Proton Mail for Business vs IceWarp
On privacy it's Proton Mail for Business. On price it's IceWarp. On features it's Proton Mail for Business. Here's everything side by side, last checked 25 October 2026.
Proton Mail for Business or IceWarp: which should you choose?
- Choose Proton Mail for Business if you want encryption that means even the provider can't read your mail; your email to stay in Switzerland; and 15 GB of storage.
- Choose IceWarp if you want a cheaper plan, at $1.35 a user a month, yearly ($1.50 monthly) and the choice of any mail app over IMAP.
| Feature | Proton Mail for Business | IceWarp |
|---|---|---|
| Overall | 4.0 | 3.0 |
| Privacy | 4.5 | 1.5 |
| Price | 2.5 | 4.5 |
| Features | 4.5 | 4.0 |
| Cheapest plan | Mail Essentials $6.99 per user a month | Cloud, entry plan $1.35 a user a month, yearly ($1.50 monthly) |
| Free plan | No | No |
| Storage | 15 GB | 2 GB |
| Your own domain | ✓ 3 | ✓ Yes |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | Czechia |
| Your data is kept in | Switzerland | The data centre you choose |
| Founded | 2014 | Unknown |
| Free trial | 30-day refund | First month free |
| 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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The key differences
- Cheapest plans: Proton Mail for Business Mail Essentials, $6.99 per user a month. IceWarp Cloud, entry plan, $1.35 a user a month, yearly ($1.50 monthly).
- Proton Mail for Business comes with 15 GB of storage and IceWarp with 2 GB of storage.
- Data location: Switzerland for Proton Mail for Business, The data centre you choose for IceWarp.
- Proton Mail for Business is based in Switzerland and IceWarp in Czechia, so different privacy laws apply.
- Proton Mail for Business encrypts mail end to end; IceWarp doesn't encrypt mail end to end.
- Proton Mail for Business works in other mail apps through Proton Bridge on paid plans, and IceWarp works in any mail app over IMAP.
Questions people ask
Which is more private, Proton Mail for Business or IceWarp?
Proton Mail for Business scores 4.5 out of 5 for privacy and IceWarp 1.5. Proton Mail for Business gives you encryption that means even the provider can't read your mail, your email to stay in Switzerland and apps whose code is public.
Which is cheaper, Proton Mail for Business or IceWarp?
IceWarp is cheaper. Its Cloud, entry plan plan is $1.35 a user a month, yearly ($1.50 monthly), 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.
Do Proton Mail for Business and IceWarp work with my own domain?
Yes, both do. Proton Mail for Business: 3 domains on its cheapest plan that allows one. IceWarp: Yes.
Where do Proton Mail for Business and IceWarp keep my email?
Proton Mail for Business keeps it in Switzerland. IceWarp keeps it in The data centre you choose.
Do Proton Mail for Business and IceWarp work in other mail apps?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. IceWarp works in any mail app over IMAP.
Price changes and news
- 22 October 2026 IceWarp: $3.50 a user a month, when I checked
The latest headlines: Proton Mail for Business news · IceWarp news.
Also worth a look
Proton Mail for Business vs mailbox.org · IceWarp vs mailbox.org · Proton Mail for Business vs Posteo · IceWarp vs Posteo · Proton Mail for Business vs Proton Mail · IceWarp vs Proton Mail
Switching between them
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.