Open Source Zimbra Collaboration Suite Alternatives
The best open source alternative to Zimbra Collaboration Suite is Roundcube, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Zimbra Collaboration Suite and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Zimbra Collaboration Suite are mailcow: dockerized (Free, Open Source), Horde (Free, Open Source), iRedMail (Freemium, Open Source) and Kolab Community (Freemium, Open Source).
- 43 alternatives
- 20 showing
- Open Source