| Tool | Sensor/Device Limit | Learning Curve | |------|---------------------|----------------| | Zabbix | Unlimited (NB: each check counts as an "item") | High | | Checkmk Raw | Up to 750 services free | Medium | | LibreNMS | Unlimited (uses SNMP) | Medium | | Nagios Core | Unlimited | High | | Prometheus + Grafana | Unlimited | High |
Use PRTG’s "sensor factory" and "library" features to monitor multiple similar devices with fewer sensors. For example, you can monitor 10 Linux servers’ disk usage using a single "SSH Linux Disk Free" sensor template with auto-discovery. prtg network monitor license key
Introduction: The Quest for the PRTG Key If you manage an IT infrastructure, you have likely heard of PRTG Network Monitor (Paessler Router Traffic Grapher). It is one of the most popular, all-in-one monitoring solutions on the market, used by small businesses and large enterprises alike to track bandwidth, server health, application performance, and more. | Tool | Sensor/Device Limit | Learning Curve