# Top Free Network Monitoring Software ## How Many Network Monitoring Software Products Does G2 Track? **Total Products under this Category:** 183 ### Category Stats (Jul 2026) - **Average Rating:** 4.5/5 The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** NetSense NMS (+5.56%) - Among all products in this category, NetSense NMS recorded the largest rating increase compared to last month _Last updated: July 24, 2026_ ## How Does G2 Rank Network Monitoring Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 19,400+ Authentic Reviews - 183+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## G2 Grid® for Network Monitoring Software ![G2 Grid® for Network Monitoring Software plotting products by satisfaction and market presence](https://www.g2.com/categories/network-monitoring/grids.png?focus%5B%5D=25671&focus%5B%5D=16222&focus%5B%5D=17351&focus%5B%5D=10874&focus%5B%5D=13665&focus%5B%5D=17801&focus%5B%5D=2397&focus%5B%5D=3824) Highlighted products: NinjaOne, Atera, OpManager Nexus, Paessler PRTG, Site24x7, IBM SevOne, TeamViewer, and Datadog. Underlying data: [Grid® JSON](https://www.g2.com/categories/network-monitoring/grids.json?focus%5B%5D=ninjaone&focus%5B%5D=atera&focus%5B%5D=opmanager-nexus&focus%5B%5D=paessler-prtg&focus%5B%5D=site24x7&focus%5B%5D=ibm-sevone&focus%5B%5D=teamviewer&focus%5B%5D=datadog) **Sponsored** ### Centreon Infra Monitoring Centreon is a comprehensive IT monitoring solution designed to help organizations gain full visibility and control over their IT operations. By providing real-time insights into system performance, network health, and application availability, Centreon enables businesses to proactively manage their IT environments, ensuring uninterrupted operations and optimal resource utilization. Targeted primarily at IT departments and operations teams, Centreon serves a diverse range of industries, from small businesses to large enterprises. Its user-friendly interface and customizable dashboards make it accessible for both technical and non-technical users. This versatility allows organizations to tailor the monitoring experience to their specific needs, making it an invaluable tool for maintaining operational efficiency and enhancing service delivery. One of the key use cases for Centreon is its ability to prevent downtime through proactive issue detection. By continuously monitoring critical systems and applications, Centreon alerts IT teams to potential problems before they escalate into significant outages. This proactive approach minimizes disruptions and helps organizations maintain a reliable IT infrastructure, which is essential for meeting business demands and ensuring customer satisfaction. Centreon also emphasizes resource optimization, allowing businesses to maximize efficiency and reduce IT costs. By providing detailed insights into resource utilization, organizations can identify underperforming assets and make informed decisions about capacity planning and resource allocation. This capability enables businesses to streamline their IT operations, ultimately leading to cost savings and improved performance. In addition, Centreon enhances the user experience by delivering consistent, high-quality IT services. With its comprehensive monitoring capabilities, IT teams can ensure that applications and services are running smoothly, providing end-users with the reliable performance they expect. This focus on user experience fosters customer loyalty and supports overall business success by aligning IT services with organizational goals. Centreon distinguishes itself in the IT monitoring category by combining powerful monitoring features with a user-centric approach. Its ability to deliver actionable insights, prevent downtime, optimize resources, and enhance user experience makes it a vital tool for organizations looking to improve their IT operations and achieve business success. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=paid_promo&secure%5Bad_slot%5D=category_product_list&secure%5Bcategory_id%5D=128&secure%5Bchosen_at%5D=2026-07-28T20%3A02%3A44Z&secure%5Bmedium%5D=sponsored&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=42028&secure%5Bresource_id%5D=128&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Fnetwork-monitoring%2Ffree&secure%5Btoken%5D=6bd276cde5b344c6f1be2f62ca2958394b5e822136d080c4e5ba2a9b2d9ab918&secure%5Burl%5D=https%3A%2F%2Fwww.centreon.com%2Fcentreon-infra-monitoring%2F&secure%5Burl_type%5D=paid_promos) [ NinjaOne ](https://www.g2.com/products/ninjaone/reviews) By [NinjaOne](https://www.g2.com/sellers/ninjaone) [ 4.7/5(4,910) ](https://www.g2.com/products/ninjaone/reviews) What do users say? Users consistently praise the ease of use and powerful automation features of NinjaOne, which streamline IT management tasks and save time. The intuitive interface allows for quick deployment and effe Pros and Cons [ Ease of Use (1373) ](https://www.g2.com/products/ninjaone/reviews?qs=pros-and-cons)[ Missing Features (792) ](https://www.g2.com/products/ninjaone/reviews?qs=pros-and-cons) [ Atera ](https://www.g2.com/products/atera/reviews) By [Atera](https://www.g2.com/sellers/atera) [ 4.6/5(1,233) ](https://www.g2.com/products/atera/reviews) What do users say? Users consistently praise Atera for its intuitive interface and all-in-one platform that simplifies IT management tasks. The ability to manage monitoring, ticketing, and remote access from a single da Pros and Cons [ Ease of Use (386) ](https://www.g2.com/products/atera/reviews?qs=pros-and-cons)[ Missing Features (161) ](https://www.g2.com/products/atera/reviews?qs=pros-and-cons) [ OpManager Nexus ](https://www.g2.com/products/opmanager-nexus/reviews) By [Zoho](https://www.g2.com/sellers/zoho-b00ca9d5-bca8-41b5-a8ad-275480841704) [ 4.6/5(225) ](https://www.g2.com/products/opmanager-nexus/reviews) What do users say? Users consistently praise the user-friendly interface and real-time monitoring capabilities of ManageEngine OpManager, which simplify network management and enhance operational efficiency. The tool's Pros and Cons [ Monitoring (44) ](https://www.g2.com/products/opmanager-nexus/reviews?qs=pros-and-cons)[ Complexity (14) ](https://www.g2.com/products/opmanager-nexus/reviews?qs=pros-and-cons) [ Paessler PRTG ](https://www.g2.com/products/paessler-prtg/reviews) By [Paessler GmbH](https://www.g2.com/sellers/paessler-gmbh) [ 4.7/5(210) ](https://www.g2.com/products/paessler-prtg/reviews) What do users say? Users consistently praise the ease of setup and intuitive dashboards of Paessler PRTG, highlighting how quickly they can start monitoring their networks without extensive configuration. The auto-disco Pros and Cons [ Ease of Use (76) ](https://www.g2.com/products/paessler-prtg/reviews?qs=pros-and-cons)[ Expensive (30) ](https://www.g2.com/products/paessler-prtg/reviews?qs=pros-and-cons) [ Site24x7 ](https://www.g2.com/products/site24x7/reviews) By [Zoho](https://www.g2.com/sellers/zoho-b00ca9d5-bca8-41b5-a8ad-275480841704) [ 4.6/5(441) ](https://www.g2.com/products/site24x7/reviews) What do users say? Users consistently praise the product for its ease of use and reliable alerts, which help them monitor their systems effectively. The intuitive interface and comprehensive monitoring capabilities allo Pros and Cons [ Ease of Use (72) ](https://www.g2.com/products/site24x7/reviews?qs=pros-and-cons)[ Alert Issues (22) ](https://www.g2.com/products/site24x7/reviews?qs=pros-and-cons) [ TeamViewer ](https://www.g2.com/products/teamviewer/reviews) By [TeamViewer](https://www.g2.com/sellers/teamviewer) [ 4.5/5(4,056) ](https://www.g2.com/products/teamviewer/reviews) What do users say? Users consistently praise the software for its ease of use and reliable remote access, making it a preferred choice for remote support and collaboration. Many appreciate its intuitive interface and qu Pros and Cons [ Ease of Use (518) ](https://www.g2.com/products/teamviewer/reviews?qs=pros-and-cons)[ Connection Issues (181) ](https://www.g2.com/products/teamviewer/reviews?qs=pros-and-cons) [ Datadog ](https://www.g2.com/products/datadog/reviews) By [Datadog](https://www.g2.com/sellers/datadog) [ 4.4/5(726) ](https://www.g2.com/products/datadog/reviews) What do users say? Users consistently praise real-time monitoring and the intuitive dashboards that simplify tracking application performance and infrastructure health. The platform's ability to consolidate logs, metric Pros and Cons [ Ease of Use (145) ](https://www.g2.com/products/datadog/reviews?qs=pros-and-cons)[ Expensive (92) ](https://www.g2.com/products/datadog/reviews?qs=pros-and-cons) [ ExtraHop ](https://www.g2.com/products/extrahop/reviews) By [ExtraHop Networks](https://www.g2.com/sellers/extrahop-networks) [ 4.6/5(68) ](https://www.g2.com/products/extrahop/reviews) What do users say? Users consistently praise ExtraHop for its comprehensive network visibility and ease of use, allowing teams to quickly identify and respond to security threats. The intuitive interface and customizabl Pros and Cons [ All-in-One Solution (1) ](https://www.g2.com/products/extrahop/reviews?qs=pros-and-cons) [ Dynatrace ](https://www.g2.com/products/dynatrace/reviews) By [Dynatrace](https://www.g2.com/sellers/dynatrace) [ 4.5/5(1,366) ](https://www.g2.com/products/dynatrace/reviews) What do users say? Users consistently praise Dynatrace for its AI-driven insights and ease of deployment, which streamline monitoring and troubleshooting across complex environments. The platform's ability to provide co Pros and Cons [ Ease of Use (84) ](https://www.g2.com/products/dynatrace/reviews?qs=pros-and-cons)[ Learning Curve (43) ](https://www.g2.com/products/dynatrace/reviews?qs=pros-and-cons) [ Entuity ](https://www.g2.com/products/entuity/reviews) By [Park Place Technologies](https://www.g2.com/sellers/park-place-technologies) [ 4.6/5(102) ](https://www.g2.com/products/entuity/reviews) What do users say? Users consistently praise the intuitive user interface and ease of use of Entuity, highlighting how it simplifies network monitoring and management tasks. Many appreciate its comprehensive features, s Pros and Cons [ Ease of Use (11) ](https://www.g2.com/products/entuity/reviews?qs=pros-and-cons)[ Integration Issues (4) ](https://www.g2.com/products/entuity/reviews?qs=pros-and-cons) [ SolarWinds Observability ](https://www.g2.com/products/solarwinds-worldwide-llc-solarwinds-observability/reviews) By [SolarWinds Worldwide LLC](https://www.g2.com/sellers/solarwinds-worldwide-llc) [ 4.3/5(862) ](https://www.g2.com/products/solarwinds-worldwide-llc-solarwinds-observability/reviews) What do users say? Users consistently praise the unified visibility SolarWinds Observability provides across infrastructure, applications, and networks, which simplifies monitoring and enhances troubleshooting efficienc Pros and Cons [ Ease of Use (21) ](https://www.g2.com/products/solarwinds-worldwide-llc-solarwinds-observability/reviews?qs=pros-and-cons)[ Learning Curve (13) ](https://www.g2.com/products/solarwinds-worldwide-llc-solarwinds-observability/reviews?qs=pros-and-cons) [ ManageEngine NetFlow Analyzer ](https://www.g2.com/products/manageengine-netflow-analyzer/reviews) By [Zoho](https://www.g2.com/sellers/zoho-b00ca9d5-bca8-41b5-a8ad-275480841704) [ 4.6/5(50) ](https://www.g2.com/products/manageengine-netflow-analyzer/reviews) What do users say? Users consistently praise the real-time monitoring and network visibility provided by ManageEngine NetFlow Analyzer, which simplifies troubleshooting and enhances capacity planning. The intuitive dash Pros and Cons [ Ease of Use (10) ](https://www.g2.com/products/manageengine-netflow-analyzer/reviews?qs=pros-and-cons)[ Complex Configuration (5) ](https://www.g2.com/products/manageengine-netflow-analyzer/reviews?qs=pros-and-cons) [ N-able N-central ](https://www.g2.com/products/n-able-n-central/reviews) By [N-able](https://www.g2.com/sellers/n-able) [ 4.4/5(562) ](https://www.g2.com/products/n-able-n-central/reviews) What do users say? Users consistently praise the product for its robust automation capabilities and comprehensive monitoring, which streamline IT management and enhance proactive issue resolution. The platform's ability Pros and Cons [ Ease of Use (188) ](https://www.g2.com/products/n-able-n-central/reviews?qs=pros-and-cons)[ Missing Features (87) ](https://www.g2.com/products/n-able-n-central/reviews?qs=pros-and-cons) [ Progress WhatsUp Gold ](https://www.g2.com/products/progress-whatsup-gold/reviews) By [Progress Software](https://www.g2.com/sellers/progress-software) [ 4.4/5(389) ](https://www.g2.com/products/progress-whatsup-gold/reviews) What do users say? Users consistently praise the ease of use and real-time monitoring capabilities of Progress WhatsUp Gold, highlighting its intuitive interface and effective alerting system that helps quickly identify Pros and Cons [ Ease of Use (47) ](https://www.g2.com/products/progress-whatsup-gold/reviews?qs=pros-and-cons)[ Expensive (16) ](https://www.g2.com/products/progress-whatsup-gold/reviews?qs=pros-and-cons) [ Pandora FMS ](https://www.g2.com/products/pandora-fms/reviews) By [Pandora FMS](https://www.g2.com/sellers/pandora-fms) [ 4.6/5(217) ](https://www.g2.com/products/pandora-fms/reviews) What do users say? Users consistently praise Pandora FMS for its comprehensive monitoring capabilities and user-friendly interface, which allow for effective management of servers, networks, and applications. The softwa Pros and Cons [ Monitoring (138) ](https://www.g2.com/products/pandora-fms/reviews?qs=pros-and-cons)[ Learning Curve (44) ](https://www.g2.com/products/pandora-fms/reviews?qs=pros-and-cons) - ‹ Prev‹ Prev - 1 - [2](/categories/network-monitoring/free?order=g2_score&page=2#product-list) - [3](/categories/network-monitoring/free?order=g2_score&page=3#product-list) - [4](/categories/network-monitoring/free?order=g2_score&page=4#product-list) - [5](/categories/network-monitoring/free?order=g2_score&page=5#product-list) - [Next ›Next ›](/categories/network-monitoring/free?order=g2_score&page=2#product-list) Spotlight Categories [Low-Code Development Platforms](https://www.g2.com/categories/low-code-development-platforms) [Field Service Management Software](https://www.g2.com/categories/field-service-management) [Event Management Platforms](https://www.g2.com/categories/event-management-platforms) [Virtual Event Platforms](https://www.g2.com/categories/virtual-event-platforms) [Employee Recognition Software](https://www.g2.com/categories/employee-recognition) Similar Categories - [AI Agent Observability](/categories/ai-agent-observability) - [Application Performance Monitoring (APM)](/categories/application-performance-monitoring-apm) - [Cloud Infrastructure Monitoring](/categories/cloud-infrastructure-monitoring) - [Database Monitoring](/categories/database-monitoring) - [Enterprise Monitoring](/categories/enterprise-monitoring) - [Hardware Monitoring](/categories/hardware-monitoring) - [Log Monitoring](/categories/log-monitoring) - [Observability Pipeline](/categories/observability-pipeline) - [Observability Software](/categories/observability-software) - [Other Monitoring](/categories/other-monitoring) - [Website Monitoring](/categories/website-monitoring) [Browse Network Monitoring Themes](/categories/network-monitoring/themes)