Based on our record, Observium seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Environment-wide stats such as disk utilization and load averages can be done using Observium with very minimal effort required to get started (no additional agent required as it monitors using SNMP, and it automatically detects what to monitor on a system / UPS / PDU / etc). Source: over 2 years ago
If you're looking for a tool that can graph resource utilization for a large number of device types out of the box using SNMP, you might take a look at Observium. Source: over 2 years ago
Prometheus - An open-source systems monitoring and alerting toolkit.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
LibreNMS - A fully featured network monitoring system that provides a wealth of features and device support.
Fluent Bit - Data collector and log forwarder.
Icinga - Icinga is a fork of Nagios and is backward compatible.
collectd - System and applications metrics collector