Mailu vs Zimbra
They tie on privacy, they tie on price and they tie on features. Every fact below was checked on or before 25 October 2026.
Which should you choose?
- Zimbra is the better pick if you want calendar and contacts in the same account.
| Feature | Mailu | Zimbra |
|---|---|---|
| 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 | Open-source edition; paid Network Edition |
| Storage | Not confirmed | Not confirmed |
| Your own domain | ✓ Yes | ✓ Yes |
| End-to-end encryption | No | No |
| Company based in | Not confirmed | United States |
| Your data is kept in | Your own server | Your own server |
| Founded | Unknown | Unknown |
| Free trial | Free to download | Unknown |
| Funded by advertising | No | No |
| Works in any mail app | ✓ IMAP and SMTP | ✓ IMAP and SMTP |
| Calendar and contacts | No | ✓ Yes |
| Aliases | Yes | Yes |
| Open-source apps | ✓ Yes | ✓ Yes |
| Sign up without ID | No | No |
| White label | Unknown | Unknown |
| Reader offer | None | None |
| Last checked | 25 October 2026 | 22 October 2026 |
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The key differences
- Mailu has a free plan (open source); Zimbra has Open-source edition; paid Network Edition.
- The companies sit under different laws: Mailu in Not confirmed, Zimbra in United States.
Mailu and Zimbra: your questions
Can I use my own domain with Mailu or Zimbra?
Yes, both do. Mailu: Yes. Zimbra: Yes.
Where is my email stored with Mailu and Zimbra?
Both keep it in Your own server.
Price changes and news
I haven't seen either change its price since I started checking on 22 October 2026.
The latest headlines: Mailu news · Zimbra news.
Switching between them
Moving between any two providers works the same way. Pick your two providers for the steps.