PRTG
PRTG gives teams a way to evaluate infrastructure monitoring software fit, deployment tradeoffs, and day-to-day operational usability.
Sensor-based pricing, Cloud / On-prem deployment, Windows operating-system support, and a trial path for early validation.
PRTG is usually a better fit when cloud / on-prem, sensor-based, and Windows line up more closely with the environment your team actually needs to support.