Side by side
Modoboa vs Zimbra Collaboration
Both stand on mail server software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxSelf-hostedWeb
Visit Modoboa 
Free plan AndroidiPhoneLinux+4
Visit Zimbra Collaboration The facts
| Modoboa | Zimbra Collaboration | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Self-hosted, Web | Android, iPhone, Linux, Mac, Self-hosted, Web, Windows |
| Lowest paid plan | Modoboa Pro: €139.30 a year | Free or on request |
| Plans published | 7 | 2 |
| Maker | Not published | Not published |
| Website | modoboa.org | zimbra.com |
| On mail server software | #18 of 34 | #22 of 34 |
Alternatives to Modoboa Alternatives to Zimbra Collaboration The whole list