Observium provides a free version and free trial, while others provide a free trial only. Live online training and documentation are available for observing, while others do not have these. It provides bandwidth monitoring, baseline management, resources management, server …
Observium is easier to use and "prettier" than most of the other open source tools out there. It's also significantly cheaper than most of the mid-range NMS products out there, and several orders of magnitude cheaper than the big boys. It tends to be my go-to NMS for these …
I haven't used other products that are similar to Observium. Observium is an open tool, with a robust feature set. There are elements of comparable monitoring across other tools, but nothing I've seen that is a complete parallel in terms of feature set and visualizations. If I …