Best network monitoring tools

Network monitoring is something that every company should be doing. However, with such a huge range of network monitoring software and tools, choosing the right one for your environment and budget can be challenging. In this article we’re going to compare and rank the best network monitoring tools for 2020.

As part of our comparison we’ve looked out for important network management platform features such as SNMP, network mapping, uptime/downtime, alerting, bandwidth monitoring, network health, dashboards, and more to highlight tools with an exceptional user experience.

The list includes a combination of free, paid, and open source software for Windows, Mac, and Linux. We’ve also listed the main features in each section to help you find the right tool for your network.

Here is a list of the best network monitoring tools:

  1. SolarWinds Network Performance Monitor EDITOR’S CHOICE
    Far more than just a simple scanner. Most network security issues arise when configurations are changed and SolarWinds NPM identifies these and can automatically resolve many. Alongside solid vulnerability scanning and advanced options to create and monitor policies, this is by far the top choice for network monitoring systems.
  2. Paessler PRTG Network Monitor Free network monitoring software that uses SNMP, packet sniffing and WMI to monitor your network.
  3. Atera Cloud-based RMM system includes a large range of monitors – server, network device, and application – suitable for all sized businesses.
  4. Site24x7 Network management platform tools that can monitor network devices, websites, servers, applications, and more.
  5. ManageEngine OpManager Network monitor that can monitor SNMP devices, switches, servers, and virtualized network services.
  6. Nagios Core – One of the top open-source network monitoring tools. Includes a dashboard view, alerts system, community plugins, and more.
  7. Zabbix – Open source network monitoring software with SNMP and IPMP monitoring. Includes an alerts system and community plugins.
  8. Zenoss Cloud – Application and network service monitoring tool with machine learning anomaly detection and root cause analysis.
  9. Icinga – Open source network monitoring system with a DSL. Includes extensions.
  10. Spiceworks Connectivity Dashboard – Free network monitoring software with a high-quality dashboard and simple alert system.

The best network monitoring tools

1. SolarWinds Network Performance Monitor (FREE TRIAL)

SolarWinds Network Performance Monitor

SolarWinds Network Performance Monitor is a comprehensive network performance monitoring tool that can monitor the status of devices with SNMP. It can automatically discover network devices connected to your network. Use the dashboard to monitor the availability and performance of connected network devices from a holistic perspective.

Any devices, applications, or services that have been discovered can also be viewed on a network topology map where you can see how your infrastructure links together. The NetPath feature allows you to trace packet transfers hop-by-hop, which can help to diagnose the origin of performance network issues more effectively.

The custom alerts system enables you to set trigger conditions for alerts. Once the trigger conditions are met the software will send you a notification by email or SMS to let you know that an event has taken place. The user can view a comprehensive list of alerts according to severity by going to the All Active Alerts page.

SolarWinds Network Performance Monitor is a top network monitoring system because of its diverse feature set. It can rotate between SNMP monitoring to packet analysis with ease, giving you control over what segments of your network you monitor. The price of SolarWinds Network Performance Monitor starts at $2,995 (£2,304). You can download the 30-day free trial.

Key features:

  • SNMP monitoring
  • Automatically discovers connected network devices
  • Network packet analysis
  • Intelligent network maps with NetPath
  • Create Wifi heat maps
  • Alerts system
  • Reports system

Related post: SolarWinds Network Monitor – Full Review


SolarWinds Network Performance Monitor gives detailed insights into what causes network slowness and allows you to quickly resolve the root causes using deep packet inspection. By identifying network traffic by application, category, (business vs. social), and risk level you can eliminate and filter problem traffic and measure application response time. With a great user interface, this is an excellent choice for packet sniffing and network analysis.

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OS: Windows Server

2. Paessler PRTG Network Monitor (FREE TRIAL)

Paessler PRTGPRTG Network Monitor from Paessler is a free network monitoring suite that uses SNMP, packet sniffing, and WMI to monitor your network. Scan network segments to discover and add devices to monitor. You can choose between a range of sensors to monitor various segments of your network. Each sensor monitors an individual value in your network, for instance, there are Bandwidth Monitoring Sensors, Hardware Parameters Sensors, network data usage meters, SNMP sensors, VOIP and QoS sensors, and more.

For greater visualization, the tool has a customizable dashboard that allows you to produce real-time network maps of your infrastructure. You can create maps with the drag-and-drop editor and use over 300 map objects to build the map. You can even create your own map objects with custom HTML.

The threshold-based alerts system keeps the user updated if the status of a sensor changes, a value changes or a threshold is breached. Notifications are available in a variety of formats including email, push notification, SMS, Slack message, Syslog message, SNMP trap, HTTP action, execute program, and more.

PRTG Network Monitor is a must-try for enterprises looking for cost-effective but comprehensive network monitoring tools. The platform is available for free for less than 100 sensors, after which you have to pay. Paid versions start at $1,600 (£1,231.14) for 500 sensors and 1 server installation. Download the 30-day free trial.

Key features:

  • SNMP monitoring
  • Bandwidth monitoring
  • Scan for network devices by IP segment
  • Custom dashboards
  • Threshold-based alerts system
  • Reports system
  • Customizable network maps

Related post: Paessler PRTG Network Monitor – Full Review

PRTG Network Monitor from Paessler Download 30-day FREE Trial

3. Atera


Atera is a network monitor designed for use by managed service providers (MSPs). In fact, this system has a range of monitors, including server and application monitors. This platform provides all of the software that an MSP’s team of technicians needs to successfully run a network. That includes maintenance tasks as well as just passive system monitoring.

The network monitor is part of a suite of utilities that are known as a remote monitoring and management (RMM) system. A key part of this network service is that the monitoring team of technicians is not on the same site as the network being monitored. The capability to monitor a system remotely is very liberating because it also means that the server running the monitoring software does not need to be in the same building as the technician who uses it.

Atera software is a service that is delivered from the cloud. You do not need to maintain your own servers to run this platform. However, the client site will need agents installed on it. MSP technicians access the system console through a standard web browser. There is also a mobile app that enables system administrators to check in on the status of the monitored network from anywhere.

The ability to just log into the system from any device is very important because Atera includes a high degree of automation. The service monitors the client’s network and only requires human attention when a problem arises. In these instances, Atera generates an alert and can send those out to the technician through the mobile app.

The network monitoring service of Atera is based on the Simple Network Management Protocol (SNMP). This methodology includes the facility of device agent-generated alerts. It also provides a mechanism for network discovery and the ability to compile an equipment inventory automatically.

The Atera network service is available in three packages: Pro, Growth, and Power. The system is charged for by subscription per technician per month. You can opt to pay yearly, which works out cheaper. Atera offers a free trial.

Key features:

  • All-in-one solution with automatic network discovery
  • Real-time application and network device monitor
  • Powerful reporting, analytics, and alerts

4. Site24x7 Cloud Network Monitoring System


Site24x7 is a cloud-based network monitoring software that uses SNMP to monitor your network. The software is very easy to configure. Site 24×7 automatically discovers SNMP devices by IP range. From then onwards, the user can use over 4,000 device templates to starting monitoring out-of-the-gate without configuring everything from scratch.

Metrics you can monitor include memory utilization, CPU usage, disk utilization, active session count, and more. The majority of the monitoring experience takes place through the health dashboard where you can view an overview of device performance in your entire network.

You can view the top network devices by response time and packet loss to find performance issues you need to address. If you require more visibility into a problem then you can view layer 2 network maps to view the network topology.

Site 24×7 one of the most formidable network monitoring tools because it not only covers SNMP but application and website monitoring as well. The transition between onboarding the tool, automatically discovering devices, and using device templates is very smooth. All-in-one paid packages range from $35 (£26.94) per month to $449 (£345.54) per month. Site24x7 is available on a 30-day free trial.

Key features:

  • Automatically discover SNMP devices by IP range
  • Network mapping
  • Over 4000 device monitoring templates
  • Rest APIs
  • Server monitoring
  • Website monitoring

Further Reading: Site24x7 – Full Review

5. ManageEngine OpManager

ManageEngine OpManager

ManageEngine OpManager is a network monitoring solution that can monitor the performance of network devices, servers, routers, switches, and virtual machines in real-time. Customizable dashboards provide over 200 widgets for you to create a unique monitoring experience.

SNMP monitoring keeps you updated on the performance of devices within your network. For increased visibility, you can use the network mapping feature to automatically discover and map new devices. You can schedule network discovery to find new devices once they’re added to your network.

The alerts system helps you to respond to performance changes quickly. ManageEngine OpManager correlates network events and only presents relevant alerts to the user while minimizing false positives. The program sends alerts by email and SMS to keep you updated on any emerging problems.

Manageengine OpManager is an all-in-one network monitor that is recommended for users that want a simple infrastructure monitoring tool. Paid versions start at $245 (£188.55) for 10-1,000 devices up to $11,545 (£8,885 for 250-10,000 devices. You can download the 30-day free trial.

Key features:

  • Automatic discovery
  • Network mapping
  • SNMP monitoring
  • Email and SMS alerts
  • Customizable dashboards

Related post: ManageEngine OpManager – Full Review

6. Nagios Core

Nagios XI

Nagios Core is an open-source network monitor that has a web interface for monitoring network performance. Through the user network interface, you can monitor your Current Network Status with your Host Status Totals and Network Service Status Totals broken down at the top of the page. The GUI is color-coded so you can easily see elements that are unavailable or compromised.

Track performance events through the alerts system, which sends out notifications by email and SMS. View the Alert History section to see what alerts were created and when. The list of alerts is also color-coded making it easier to prioritize critical alerts.

You can use APIs to integrate other network services. If you require more functions then you can also check the thousands of community plugins available on the Nagios Exchange to help you add additional functions. For example, there is a check SNMP CPU load plugin that allows you to monitor the SNMP load or CPU usage of your network device.

Nagios Core is an excellent free network monitoring software however the setup can be slightly more hands-on than other products on this list. Download Nagios Core for free, or depending on your needs, see how it compares with Nagios XI.

Key features:

  • Performance dashboard
  • Alerts system
  • Availability reports
  • Capacity planning
  • Community-created plugins
  • APIs

7. Zabbix


Zabbix is an open-source network monitor that combines network, server, cloud, application, and services monitoring into one unified solution. Zabbix uses SNMP and IPMP to monitor your network. The autodiscovery feature automatically locates network devices and adds them to be monitored. The tool can also detect configuration changes automatically so you can tell if a network device has been updated.

Network monitoring templates make it easy to configure the program for monitoring. For example, there are preconfigured templates for vendors such as Cisco, Hewlett Packard Enterprise, Dell, Intel, Netgear, and more. If you require more variety then you can access even more community templates form the Zabbix community site.

To ensure that you can respond to alerts in time, Zabbix has a notification system. Alerts are sent by email, SMS, messenger, jabber, or custom scripts to update you on evolving network security events. The notification content can be customized according to the recipient to make sure that the point of contact has everything they need to reopen intelligently.

Zabbix is one of the top Linux network monitoring tools on the market. Autodiscovery and templates make the program straightforward to deploy. You can download the software for free.

Key features:

  • Autodiscovery feature
  • SNMP and IPMP monitoring
  • Application monitoring
  • Server monitoring
  • Network monitoring templates
  • Automatic detection of configuration changes
  • Alerts system

8. Zenoss Cloud

Zenoss Cloud

Zenoss Cloud is an application and service monitoring platform designed to function within multi-cloud environments. With Zenoss Cloud you can monitor everything from network devices to applications, logs, and event network data in real-time. Intelligent dashboards provide you with a complete perspective of performance concerns.

The platform uses machine learning-based anomaly detection to automatically detect performance deviations. Once an anomaly has been detected instant root-cause analysis helps the user to drill-down to the root cause of the problem. Machine learning is very useful because it drives down the mean time to resolution of network events.

There is also a range of extensions available called ZenPacks. ZenPacks are essentially plugins that are developed by the community and cover everything from devices to services. There are open-source plugins for Amazon Web Services, Apache HTTP Server, Dell, Docker, HP, Cisco, Oracle, MySQL, and more.

Zenoss Cloud is aimed at companies that want to use intelligent detection and response to manage network events. Using machine learning to detect performance concerns helps to minimize the amount of disruption to the network during a performance issue. You can request a demo.

Key features:

  • Dashboards
  • Machine-learning anomaly detection
  • Root cause analysis
  • Alerts system
  • ZenPacks community plugins

9. Icinga


Icinga is an open-source network monitoring tool that monitors the performance of your network, cloud-service, and data center. The software is web-based and can be configured through the GUI or with the Domain Specific Language (DSL). Having the choice between the two gives you the power to monitor however you want.

You can log in to the GUI and use the dashboard to view an overview of performance management. The dashboard displays whether there are any problems with performance or availability and color-codes them according to severity. Critical or Down network devices are marked in red.

Extensions or Icinga Modules, allow you to add more functions to the program. For example, the Icinga Module for vSphere allows you to monitor virtual machines and host systems. There is a range of community-created plugins you can download for free from the Icinga Exchange.

Overall, Icinga is a scalable solution that gives you control over how you manage your environment. Icinga is available for Debian, Red Hat, SUSE, Ubuntu, Fedora, OpenSUSE, Raspbian, and Windows. You can download the free trial version.

Key features:

  • Web-based GUI
  • DSL configuration available
  • Dashboard
  • Icinga Modules / Extensions

10. Spiceworks Connectivity Dashboard

Spiceworks connectivity dashboard

Spiceworks Connectivity Dashboard is a popular free network monitoring software. Through the web-based GUI, you access the dashboard and monitor the availability of your network infrastructure in real-time.

The software also comes with integrations with Spiceworks Inventory and Cloud Help Desk so that you can monitor your network inventory more effectively. For example, with Spiceworks Inventory, you can monitor information on IP addresses, OS, MAC addresses, and more.

The alerts system lets you know about any performance fluctuations so you receive notifications via email. If you don’t want to configure your own alert conditions then you can use the settings the software has configured by default.

Spiceworks Connectivity Dashboard is ideal for smaller enterprises that are looking for an affordable network performance monitoring solution. It’s easy to use and it has an active user community behind it. You can download the software for free.

Key features:

  • Web-based GUI
  • Real-time dashboard
  • Graphs
  • Email alerts

Choosing a network monitoring tool

If you want to keep your network performing in tip-top shape then network monitoring tools are a must-have. A comprehensive network monitoring tool will give you the visibility to manage your devices and make sure that they’re available when you need them.

Our editor’s choice for this article is SolarWinds Network Performance Monitor because of its range of features. The tool has all the essential features you need to start monitoring your network including autodiscovery, dashboards, network maps, bandwidth monitoring, and an alerts system.

Paessler PRTG Network Monitor is another solid alternative on account of its highly configurable sensor system. Just remember to pick the solution that’s right for you, as not all programs will match your needs.

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