Proton Mail for Business vs Firefox Relay
In short: Proton Mail for Business wins on privacy, Firefox Relay wins on price, and Proton Mail for Business wins on features. The full comparison is below, last checked 25 October 2026.
Should you pick Proton Mail for Business or Firefox Relay?
- Proton Mail for Business suits you best if you want mail that's encrypted end to end without any setup; your mail kept in Switzerland; and to use your own domain, like you@yourname.co.uk.
- Go for Firefox Relay if you'd like the lower price ($0.99 a month) and a free plan before you pay anything.
| Feature | Proton Mail for Business | Firefox Relay |
|---|---|---|
| Overall | 4.0 | 2.5 |
| Privacy | 4.5 | 1.0 |
| Price | 2.5 | 5.0 |
| Features | 4.5 | Not rated |
| Cheapest plan | Mail Essentials $6.99 per user a month | Premium $0.99 a month |
| Free plan | No | Yes, 5 aliases |
| Storage | 15 GB | Forwards only |
| Your own domain | ✓ 3 | Own subdomain only |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | United States (Mozilla) |
| Your data is kept in | Switzerland | United States |
| Founded | 2014 | 2020 |
| 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 | No |
| White label | No | No |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
Where they differ
- On price: Proton Mail for Business Mail Essentials at $6.99 per user a month, against Firefox Relay Premium at $0.99 a month.
- Proton Mail for Business has no free plan; Firefox Relay has a free plan (5 aliases).
- Space: Proton Mail for Business gives 15 GB of storage, Firefox Relay no storage, as it forwards mail on.
- Proton Mail for Business keeps your mail in Switzerland, while Firefox Relay keeps it in the United States.
- The companies sit under different laws: Proton Mail for Business in Switzerland, Firefox Relay in United States (Mozilla).
- On encryption, Proton Mail for Business encrypts mail end to end, whereas Firefox Relay doesn't encrypt mail end to end.
- You can use your own domain with Proton Mail for Business, but not with Firefox Relay.
- Mail apps: Proton Mail for Business works in other mail apps through Proton Bridge on paid plans; Firefox Relay only works in its own apps.
- Aliases: Proton Mail for Business offers yes, Firefox Relay unlimited aliases.
Questions people ask
Is Proton Mail for Business more private than Firefox Relay?
Proton Mail for Business scores 4.5 out of 5 for privacy and Firefox Relay 1. Proton Mail for Business gives you mail that's encrypted end to end without any setup and your mail kept in Switzerland.
Is Proton Mail for Business cheaper than Firefox Relay?
Firefox Relay is cheaper. Its Premium plan is $0.99 a month, against $6.99 per user a month for Proton Mail for Business's Mail Essentials. Firefox Relay 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 Firefox Relay?
Only Proton Mail for Business does (3 domains on its cheapest plan that allows one). With Firefox Relay your address stays on its own domain.
Where is my email stored with Proton Mail for Business and Firefox Relay?
Proton Mail for Business keeps it in Switzerland. Firefox Relay keeps it in the United States.
Can I use Proton Mail for Business and Firefox Relay in Apple Mail or Outlook?
Proton Mail for Business works in other mail apps through Proton Bridge on paid plans. Firefox Relay only works in its own apps.
Recent price changes
Neither price has changed since my first check on 22 October 2026.
The latest headlines: Proton Mail for Business news · Firefox Relay news.
Not sold on either? Try these
Proton Mail for Business vs mailbox.org · Firefox Relay vs mailbox.org · Proton Mail for Business vs Posteo · Firefox Relay vs Posteo · Proton Mail for Business vs Proton Mail · Firefox Relay vs Proton Mail
How to switch
Moving between any two providers works the same way. Pick your two providers for the steps.