Server monitoring.

- | paid | free

setup | 10-second install; no other setup required | “easy” install = 20 minutes; can take days or weeks

resolution | updates every 15 seconds | updates every 1 to 5 minutes

simplicity | unified dashboard, real-time graphs, charts, reports | unattractive GUI [graphical user interface], difficult to use

maintenance costs | no ongoing maintenance costs | ongoing maintenance costs including work, system, and time expenses