At a minimal cost, Netdata offers real-time high fidelity, lightweight operation, data privacy, and scalability. It monitors everything from Operating Systems and Databases to Networks and Applications. Setup and usage are simple. Open-source and free to use. Track a variety of variables at the grain level. Interactive graphs and dashboards that can be customized. Several systems for changing. An actual plug-and-play device. It uses a small number of resources. It's compatible with Prometheus and Grafana.

I like netdata since its easy to install, has a nide dahshboard and cloud service to access your monitoring securely, the festure to create custom plugins is also usefull

Netdata offers enhanced visualization of K8 resource utilization clusters that are deployed in our hybrid cloud infrastructure. It provides accurate metric aggregates from various nodes/pods/containers which depend on the grouping that we choose. All contextual data & real-time metrics obtained from our resource can be overviewed effectively from its Modal window panel. The metric correlation feature is also helpful to search specific metrics & charts for a particular anomaly which can be drilled down to find the root cause of the issue.