Proton Mail vs Firefox Relay
On privacy it's Proton Mail. On price it's Firefox Relay. On features it's Proton Mail. Here's everything side by side, last checked 25 October 2026.
Proton Mail or Firefox Relay: which should you choose?
- Proton Mail is the better pick if you want end-to-end encryption built in; your mail kept in Switzerland; and to use your own domain, like you@yourname.co.uk.
- Firefox Relay suits you best if you want to pay less: $0.99 a month.
| Feature | Proton Mail | Firefox Relay |
|---|---|---|
| Overall | 4.5 | 2.5 |
| Privacy | 5.0 | 1.0 |
| Price | 4.0 | 5.0 |
| Features | 4.5 | Not rated |
| Cheapest plan | Mail Plus $3.99 a month, yearly ($4.99 monthly) | Premium $0.99 a month |
| Free plan | Yes, 1 GB, no own domain | Yes, 5 aliases |
| Storage | 15 GB | Forwards only |
| Your own domain | ✓ 1 | 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 | Free plan; 30-day refund on paid plans | 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 | 10 addresses | Unlimited aliases |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | ✓ Yes | No |
| White label | No | No |
| Reader offer | Offer Proton's current deals | None |
| Last checked | 23 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
The key differences
- Proton Mail's cheapest plan is Mail Plus ($3.99 a month, yearly ($4.99 monthly)); Firefox Relay's is Premium ($0.99 a month).
- For free, Proton Mail gives you a free plan (1 GB, no own domain), and Firefox Relay a free plan (5 aliases).
- Proton Mail comes with 15 GB of storage and Firefox Relay with no storage, as it forwards mail on.
- Proton Mail keeps your mail in Switzerland, while Firefox Relay keeps it in the United States.
- Proton Mail is based in Switzerland and Firefox Relay in the United States (Mozilla), so different privacy laws apply.
- Proton Mail encrypts mail end to end; Firefox Relay doesn't encrypt mail end to end.
- Proton Mail lets you bring your own domain name; Firefox Relay doesn't.
- Proton Mail works in other mail apps through Proton Bridge on paid plans, and Firefox Relay only works in its own apps.
- For extra addresses, Proton Mail has 10 addresses and Firefox Relay has unlimited aliases.
Questions people ask
Which is more private, Proton Mail or Firefox Relay?
Proton Mail scores 5 out of 5 for privacy and Firefox Relay 1. Proton Mail gives you end-to-end encryption built in, your mail kept in Switzerland and an account that doesn't need your phone number or ID.
Which is cheaper, Proton Mail or Firefox Relay?
Firefox Relay is cheaper. Its Premium plan is $0.99 a month, against $3.99 a month, yearly ($4.99 monthly) for Proton Mail's Mail Plus. Firefox Relay and Proton Mail also have a free plan. Check the renewal price before you pay, as some first-year prices go up.
Do Proton Mail and Firefox Relay work with my own domain?
Only Proton Mail does (1 domain on its cheapest plan that allows one). With Firefox Relay your address stays on its own domain.
Where do Proton Mail and Firefox Relay keep my email?
Proton Mail keeps it in Switzerland. Firefox Relay keeps it in the United States.
Do Proton Mail and Firefox Relay work in other mail apps?
Proton Mail 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 23 October 2026.
The latest headlines: Proton Mail news · Firefox Relay news.
Not sold on either? Try these
Proton Mail vs mailbox.org · Firefox Relay vs mailbox.org · Proton Mail vs Posteo · Firefox Relay vs Posteo · Proton Mail vs Tuta · Firefox Relay vs Tuta
How to switch
Moving to Proton Mail · Moving from Proton Mail. Or see all my switching guides.