Proton Mail for Business vs eclipso
In short: Proton Mail for Business wins on privacy, eclipso 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 eclipso: which should you choose?
- Go for Proton Mail for Business if you'd like encryption that means even the provider can't read your mail; an address on your own domain; and apps whose code is public.
- Choose eclipso if you want a cheaper plan, at €1.49 a month; to try it free first; and more room (20 GB, against 15 GB).
| Feature | Proton Mail for Business | eclipso |
|---|---|---|
| Overall | 4.0 | 3.5 |
| Privacy | 4.5 | 2.5 |
| Price | 2.5 | 4.5 |
| Features | 4.5 | 4.0 |
| Cheapest plan | Mail Essentials $6.99 per user a month | Connect €1.49 a month |
| Free plan | No | Yes, 4 GB |
| Storage | 15 GB | 20 GB |
| Your own domain | ✓ 3 | On paid plans |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | Germany |
| Your data is kept in | Switzerland | Germany |
| Founded | 2014 | Unknown |
| Free trial | 30-day refund | Free plan (Freemail) |
| 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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Where they differ
- Proton Mail for Business's cheapest plan is Mail Essentials ($6.99 per user a month); eclipso's is Connect (€1.49 a month).
- For free, Proton Mail for Business gives you no free plan, and eclipso a free plan (4 GB).
- Proton Mail for Business comes with 15 GB of storage and eclipso with 20 GB of storage.
- Data location: Switzerland for Proton Mail for Business, Germany for eclipso.
- Proton Mail for Business is based in Switzerland and eclipso in Germany, so different privacy laws apply.
- Proton Mail for Business encrypts mail end to end; eclipso doesn't encrypt mail end to end.
- Proton Mail for Business lets you bring your own domain name; eclipso doesn't.
- Proton Mail for Business works in other mail apps through Proton Bridge on paid plans, and eclipso works in any mail app over IMAP.
Proton Mail for Business and eclipso: your questions
Which is more private, Proton Mail for Business or eclipso?
Proton Mail for Business scores 4.5 out of 5 for privacy and eclipso 2.5. Proton Mail for Business gives you encryption that means even the provider can't read your mail and apps whose code is public.
Which is cheaper, Proton Mail for Business or eclipso?
eclipso is cheaper. Its Connect plan is €1.49 a month, against $6.99 per user a month for Proton Mail for Business's Mail Essentials. eclipso also has a free plan. Check the renewal price before you pay, as some first-year prices go up.
Do Proton Mail for Business and eclipso work with my own domain?
Only Proton Mail for Business does (3 domains on its cheapest plan that allows one). With eclipso your address stays on its own domain.
Where do Proton Mail for Business and eclipso keep my email?
Proton Mail for Business keeps it in Switzerland. eclipso keeps it in Germany.
Do Proton Mail for Business and eclipso work in other mail apps?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. eclipso works in any mail app over IMAP.
Recent price changes
- 22 October 2026 eclipso: Free; paid plans not confirmed, when I checked
The latest headlines: Proton Mail for Business news · eclipso news.
Not sold on either? Try these
Proton Mail for Business vs mailbox.org · eclipso vs mailbox.org · Proton Mail for Business vs Posteo · eclipso vs Posteo · Proton Mail for Business vs Proton Mail · eclipso vs Proton Mail
Switching between them
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.