Other products are good but from the configuration point of view Nagios is really very lightweight. The price is really good in my opinion. Another important thing is that my Nagios engine still works with Dual core 8GB ram for the last 10 years.
Nagios Core enhances IT infrastructure management through real-time monitoring, efficient alerts, and extensive customization for integration with tools like Splunk. Its lightweight configuration and cost-effectiveness benefit diverse environments, though setup complexity and lack of scalability are drawbacks. Monitoring a wide range of parameters is possible, yet bandwidth monitoring lags behind competitors. Despite limitations in the free version, improvements in cloud monitoring and plugin availability are necessary for handling larger setups.
