Mail-in-a-Box vs Mailu
On privacy it's a tie. On price it's a tie. On features it's a tie. Here's everything side by side, last checked 25 October 2026.
Which should you choose?
- Mail-in-a-Box is the better pick if you want your diary and address book in one place with your email.
| Feature | Mail-in-a-Box | Mailu |
|---|---|---|
| Overall | Not rated | Not rated |
| Privacy | Not rated | Not rated |
| Price | Not rated | Not rated |
| Features | Not rated | Not rated |
| Cheapest plan | Open source Free | Open source Free |
| Free plan | Yes, open source | Yes, open source |
| Storage | Not confirmed | Not confirmed |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | United States | Not confirmed |
| Your data is kept in | Your own server | Your own server |
| Founded | 2013 | Unknown |
| Free trial | Free to download | Free to download |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | No |
| Aliases | Yes | 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
- Mail-in-a-Box is based in the United States and Mailu in Not confirmed, so different privacy laws apply.
Common questions
Do Mail-in-a-Box and Mailu work with my own domain?
Yes, both do. Mail-in-a-Box: Yes. Mailu: Yes.
Where do Mail-in-a-Box and Mailu keep my email?
Both keep it in Your own server.
Recent price changes
No price changes for either since 25 October 2026. I check regularly and add any change here with its date.
The latest headlines: Mail-in-a-Box news · Mailu news.
How to switch
Whichever you choose, the move follows the same steps. Pick your two providers for the steps.