LibreNMS is a fork of Observium. The reason for the fork has nothing to do with Observium's move to community vs. paid versions. It is simply that we have different priorities and values to the Observium development team. We decided to fork (reluctantly) because we like using Observium, but we want to collaborate on a community-based project with like-minded IT professionals. See and the references there for more information about the kind of community we're trying to promote.

LibreNMS was forked from the last GPL-licensed version of Observium.

Thanks to one of our users, Dan Brown, who has written a migration script, you can easily move your Observium install over to LibreNMS. This also takes care of moving from one CPU architecture to another. Give it a try :)

How LibreNMS will be different from Observium:

Reasons why you might want to use Observium instead of LibreNMS:

Reasons why you might want to use LibreNMS instead of Observium: