Firefox Relay vs Stalwart
Firefox Relay wins on privacy, Firefox Relay wins on price and they tie on features. Every fact below was checked on or before 25 October 2026.
Which should you choose?
- Stalwart is the better pick if you want to use your own domain, like you@yourname.co.uk; to read your mail in any app, such as Apple Mail, Outlook or Thunderbird; and your diary and address book in one place with your email.
| Feature | Firefox Relay | Stalwart |
|---|---|---|
| Overall | 2.5 | Not rated |
| Privacy | 1.0 | Not rated |
| Price | 5.0 | Not rated |
| Features | Not rated | Not rated |
| Cheapest plan | Premium $0.99 a month | Community Free (Enterprise from €2 per mailbox a year) |
| Free plan | Yes, 5 aliases | Yes, open source |
| Storage | Forwards only | Not confirmed |
| Your own domain | Own subdomain only | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | United States (Mozilla) | United Kingdom |
| Your data is kept in | United States | Your own server |
| Founded | 2020 | 2019 |
| Free trial | Free plan | Free to download |
| Funded by advertising | No | No |
| Works in any mail app | No, its own apps only | ✓ IMAP and SMTP |
| Calendar and contacts | No | ✓ Yes |
| Aliases | Unlimited aliases | Yes |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | No | No |
| White label | No | Unknown |
| Reader offer | None | None |
| Last checked | 25 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
Where they differ
- Firefox Relay's cheapest plan is Premium ($0.99 a month); Stalwart's is Community (Free (Enterprise from €2 per mailbox a year)).
- For free, Firefox Relay gives you a free plan (5 aliases), and Stalwart a free plan (open source).
- Firefox Relay comes with no storage, as it forwards mail on and Stalwart with storage not confirmed.
- Firefox Relay keeps your mail in the United States, while Stalwart keeps it in Your own server.
- Firefox Relay is based in the United States (Mozilla) and Stalwart in the United Kingdom, so different privacy laws apply.
- Stalwart lets you bring your own domain name; Firefox Relay doesn't.
- Firefox Relay only works in its own apps, and Stalwart works in any mail app over IMAP.
- For extra addresses, Firefox Relay has unlimited aliases and Stalwart has yes.
Common questions
Do Firefox Relay and Stalwart work with my own domain?
Only Stalwart does (Yes). With Firefox Relay your address stays on its own domain.
Where do Firefox Relay and Stalwart keep my email?
Firefox Relay keeps it in the United States. Stalwart keeps it in Your own server.
Do Firefox Relay and Stalwart work in other mail apps?
Firefox Relay only works in its own apps. Stalwart works in any mail app over IMAP.
Prices and the latest news
I haven't seen either change its price since I started checking on 25 October 2026.
The latest headlines: Firefox Relay news · Stalwart news.
Alternatives to Firefox Relay and Stalwart
Firefox Relay vs mailbox.org · Stalwart vs mailbox.org · Firefox Relay vs Posteo · Stalwart vs Posteo · Firefox Relay vs Proton Mail · Stalwart vs Proton Mail
Moving your email
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.