Paessler PRTG is a network management software solution that monitors your network using a range of technologies to assure the availability of network components by measuring
Also listed in Server Monitoring, Network Monitoring, Hardware Monitoring, Database Monitoring, Application Performance Monitoring (APM)
What I like most about PRTG is that it helps us stay ahead of issues instead of only reacting once something breaks. We already have alerts set up for our critical infrastructure, and that configuration has genuinely helped us catch and prevent incidents before they could impact end users. I also appreciate the all-in-one approach: monitoring networks, servers, and applications from a single dashboard. Combined with flexible sensor types and an intuitive interface, it’s easy to get real-time visibility across a multi-site environment without a steep learning curve. Review collected by and hosted on G2.com.
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Helping you stay up and running from simple to the most complex environments
Also listed in Enterprise Monitoring, Server Monitoring, Hardware Monitoring, Database Monitoring, Website Monitoring
I like the way checkmk is configured, especially compared to 10 years ago. Today we have a nice structure with folders, contact groups, server groups, and corresponding rules. I also like the agents of checkmk because they don't perform evaluations, which is a huge advantage in database monitoring when the server is under load. Review collected by and hosted on G2.com.
SolarWinds® Observability is a comprehensive full-stack observability solution designed to meet the diverse needs of modern organizations, regardless of their size. This solut
Also listed in DDI Management Platform, Observability Software, Enterprise Monitoring, Server Monitoring, Log Monitoring
What I like most is the centralized visibility of the network infrastructure. I can monitor bandwidth consumption and peak link usage on a single panel, which greatly speeds up troubleshooting when there is slowness or circuit drop. Historical graphs help me quickly identify whether a problem is isolated or recurring, and configurable alerts notify me before the impact reaches the end user. I also find the interface intuitive and easy to navigate, even for beginners. Review collected by and hosted on G2.com.
Icinga is a monitoring software project that began as a fork of Nagios.
Also listed in Server Monitoring, Hardware Monitoring, Cloud Infrastructure Monitoring, Network Monitoring, Database Monitoring

What I appreciate most about Icinga is the flexibility it offers, especially when managing monitoring across a large and distributed infrastructure. I've been working with Icinga for several years, from our migration from Icinga 1 to Icinga 2 to managing and improving the platform in our day-to-day operations.
At Giesecke+Devrient, we use Icinga to monitor around 4,500 systems and over 48,000 services across more than 80 locations worldwide. We have a distributed setup with redundant masters and satellites, which allows us to monitor infrastructure across different sites and network zones while maintaining a central view of the environment. In my experience, Icinga handles this scale well when the architecture is properly designed.
One of the things I value most is how easily we can integrate it with our existing automation. We've automated monitoring deployment, onboarding and decommissioning through AWX and our infrastructure workflows, so adding or removing servers doesn't require the same manual effort it used to. The API and configuration flexibility have been particularly useful here.
We also monitor a wide range of technologies, including Linux, Windows, VMware, network devices, databases and applications. Being able to use existing plugins or develop our own checks for specific requirements is a major advantage. Icinga Web 2 gives us the visibility we need for daily monitoring, troubleshooting and handling alerts.
Overall, Icinga has given us a reliable and highly customizable monitoring platform without the licensing restrictions of many commercial solutions. It takes experience and effort to operate at this scale, but the flexibility and control it provides are the main reasons I value it. Review collected by and hosted on G2.com.
End to End Application Performance Monitoring
Also listed in Enterprise Monitoring, Server Monitoring, Hardware Monitoring, Database Monitoring, Cloud Infrastructure Monitoring

What I like most about ManageEngine Applications Manager is its comprehensive and centralized monitoring capability. It allows us to monitor applications, servers, databases, URLs, APIs, JVMs, services, and business transactions from a single platform.
I particularly appreciate:
- Centralized monitoring – Provides a single dashboard for monitoring multiple technologies and environments.
- Wide technology support – Supports application servers such as JBoss/WildFly and Tomcat, databases, Linux/Windows servers, APIs, URLs, and many other components.
- Effective alerting – Helps the monitoring team identify issues quickly through alarms, thresholds, and notifications.
- Application and infrastructure correlation – Makes it easier to understand whether an application issue is related to infrastructure, database, server, or service performance.
- Custom dashboards and reports – Useful for creating client-specific dashboards, management reports, and operational views.
- MSP suitability – Its centralized administration and probe-based architecture are particularly useful for managing monitoring across multiple clients and locations.
- Integration capabilities – The ability to integrate with tools such as OpManager and other systems helps create a unified monitoring and reporting environment.
- Troubleshooting visibility – Metrics such as JVM health, heap utilization, response time, database performance, and application availability provide useful information for L1/L2 troubleshooting.
Overall, I like Applications Manager because it provides end-to-end visibility from infrastructure to application level, which helps the monitoring team improve incident detection, troubleshooting, reporting, and service availability. Review collected by and hosted on G2.com.
enterprise open source monitoring solution for networks and applications
Also listed in Application Performance Monitoring (APM), Website Monitoring, Hardware Monitoring, Cloud Infrastructure Monitoring, Network Monitoring

What I like most about Zabbix is its powerful monitoring capabilities, flexibility, and centralized infrastructure visibility. It allows me to monitor Linux and Windows servers, network devices, CPU, memory, disk usage, services, and application performance from a single dashboard. I particularly appreciate its customizable dashboards, alerting system, templates, and SNMP monitoring capabilities. The ability to create custom monitoring items and triggers makes it highly adaptable to different infrastructure requirements. Overall, Zabbix helps identify potential issues early, reduce downtime, and maintain better control over IT infrastructure. Review collected by and hosted on G2.com.
Pandora FMS is the most flexible monitoring software in the market.
Also listed in Observability Software, Server Monitoring, Log Monitoring, Cloud Infrastructure Monitoring, Application Performance Monitoring (APM)

I use Pandora FMS to monitor our ticketing systems at a glance and easily see the status of servers, services, and physical equipment for all our clients. I appreciate its standard SNMP system, which allows me to stay on a familiar and interchangeable platform, as well as its customizable plugins and Python scripts, which offer a high degree of customization. I can deploy it in different developments, from Amazon Back-Office services to embedded equipment in C language, and manage the values and events reported in a single tool. This allows me to react quickly, even before a failure, and achieve a high level of availability. I also appreciate the connection to CloudWatch to monitor EC parameters and the automatic creation of emails and Jira cards to help level 1 support manage incidents. We chose it because it was more configurable than Zabix and Nagios. The advanced training with the Spanish team helped me understand the basic and advanced operation of the software and could be adapted to our needs, with appropriate support. I appreciate its frequent updates and the fact that user requests are taken into account in the roadmap; a topic I proposed was even integrated, allowing for true adaptation to everyone's needs. Review collected by and hosted on G2.com.
Centreon develops enterprise IT monitoring solutions based on industry standard open source.
Also listed in Server Monitoring, Hardware Monitoring, Database Monitoring, Cloud Infrastructure Monitoring, IT Alerting

The centralized view of the infrastructure and alerts that quickly identify anomalies. Dashboards facilitate daily monitoring of equipment and service availability. Review collected by and hosted on G2.com.
Splunk is a software platform for machine data that enables customers to gain real-time Operational Intelligence.
Also listed in Hardware Monitoring, ServiceNow Store Apps, Customer Data Platform (CDP), Log Analysis, Security Information and Event Management (SIEM)

It is a strong and powerful on-premises and self-managed platform for log management, security threat detection, operational intelligence, and real-time data analysis. In this Splunk instance we collect, report, and analyze data related to the devops-managed cloud environments. It has been integrated with long list of softwares to produce data at one place and can be analyzed centrally. Review collected by and hosted on G2.com.
Instana automatically discovers, maps, and monitors all services and infrastructure components across on-prem and cloud, providing AI-driven application context, issue remedia
Also listed in Log Monitoring, Hardware Monitoring, Enterprise Monitoring, Observability Software, Server Monitoring

I like the real time monitoring, it's not delayed like the other tools. It is not resource intensive and is very simple to install across windows and linux servers. The UI is very simple to use and can be integrated with most common applications. Review collected by and hosted on G2.com.