Firefox Relay vs Modoboa
In short: Firefox Relay wins on privacy, Firefox Relay wins on price, and they tie on features. The full comparison is below, last checked 25 October 2026.
Should you pick Firefox Relay or Modoboa?
- Modoboa suits you best if you want to use your own domain, like you@yourname.co.uk; the choice of any mail app over IMAP; and calendar and contacts in the same account.
| Feature | Firefox Relay | Modoboa |
|---|---|---|
| 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 | Open source Free |
| 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) | France |
| Your data is kept in | United States | Your own server |
| Founded | 2020 | Unknown |
| 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 |
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The key differences
- Cheapest plans: Firefox Relay Premium, $0.99 a month. Modoboa Open source, Free.
- Firefox Relay has a free plan (5 aliases); Modoboa has a free plan (open source).
- Space: Firefox Relay gives no storage, as it forwards mail on, Modoboa storage not confirmed.
- Firefox Relay keeps your mail in the United States, while Modoboa keeps it in Your own server.
- The companies sit under different laws: Firefox Relay in United States (Mozilla), Modoboa in France.
- You can use your own domain with Modoboa, but not with Firefox Relay.
- Mail apps: Firefox Relay only works in its own apps; Modoboa works in any mail app over IMAP.
- Aliases: Firefox Relay offers unlimited aliases, Modoboa yes.
Questions people ask
Can I use my own domain with Firefox Relay or Modoboa?
Only Modoboa does (Yes). With Firefox Relay your address stays on its own domain.
Where is my email stored with Firefox Relay and Modoboa?
Firefox Relay keeps it in the United States. Modoboa keeps it in Your own server.
Can I use Firefox Relay and Modoboa in Apple Mail or Outlook?
Firefox Relay only works in its own apps. Modoboa works in any mail app over IMAP.
Prices and the latest news
No price changes for either since 25 October 2026. I check regularly and add any change here with its date.
The latest headlines: Firefox Relay news · Modoboa news.
Not sold on either? Try these
Firefox Relay vs Posteo · Modoboa vs Posteo · Firefox Relay vs Tuta · Modoboa vs Tuta · Firefox Relay vs mailbox.org · Modoboa vs mailbox.org
Switching between them
Moving between any two providers works the same way. Pick your two providers for the steps.