Best Free Network Traffic Analysis (NTA) Software of 2025

Site24x7 provides unified cloud monitoring to support IT operations and DevOps within small and large organizations. The solution monitors real users' experiences on websites and apps from both desktop and mobile devices. DevOps teams can monitor and troubleshoot applications and servers, as well as network infrastructure, including private clouds and public clouds, with in-depth monitoring capabilities. Monitoring the end-user experience is done from more 100 locations around the globe and via various wireless carriers.

ManageEngine OpManager stands out as a robust tool for analyzing network traffic, delivering comprehensive insights into usage and performance metrics. It tracks traffic trends, bandwidth usage, and application efficiency throughout the network, empowering IT professionals to pinpoint congestion areas, resolve problems, and optimize resource distribution. Its capabilities include real-time monitoring, extensive reporting, and customizable dashboards, allowing organizations to visualize network activity, grasp user behaviors, and make data-driven decisions to improve network performance and efficiency.

NetFlow Analyzer provides real-time visibility to network bandwidth performance and leverages flow technologies. NetFlow Analyzer provides a comprehensive view of your network bandwidth usage and traffic patterns. It has been used to optimize thousands of networks worldwide. NetFlow Analyzer provides a single solution that analyzes, reports, and collects data about your network's bandwidth usage. NetFlow Analyzer can help you optimize bandwidth usage across more than a million interfaces worldwide. It also provides network forensics, network traffic analysis, and network forensics. To gain control over the most used applications, you can reconfigure policies using traffic shaping via ACLs and class-based policies. NetFlow Analyzer uses Cisco NBAR technology to provide deep visibility into Layer 7 traffic. It can also identify applications that use dynamic port numbers, or hide behind known ports.

CySight’s revolutionary Actionable Intelligence, trusted by Fortune 500 globally, enables organizations with the most cost-effective and secure way to tackle the increasing density, complexity, and expanse of modern physical and cloud networking. Deploying cyber network intelligence, CySight empowers network and security teams to substantially accelerate incident response by eliminating blindspots, analyzing network telemetry to discover anomalies, uncover cyber-threats, and quantifying asset usage and performance. CySight’s Dropless Collection method enables unsurpassed visibility of network Big-Data which is retained in the smallest footprint, accelerating machine learning, artificial intelligence and automation to fully utilize all metadata no matter the amount, size, or type.

Malcolm serves as an open-source platform for security monitoring, aimed at assisting security experts in the collection, processing, and analysis of network data to facilitate threat detection and incident response. By integrating a suite of robust tools, it enables users to capture and visualize network traffic, log information, and security alerts effectively. The platform features a user-friendly interface that simplifies the investigation of potential threats, granting security analysts detailed insights into network activities. Scalability is a key aspect of Malcolm, as it offers versatile deployment options suitable for a range of environments, from small businesses to large corporations. Additionally, its modular architecture allows users to tailor the platform according to their unique security needs, while seamless integration with other observability tools enhances overall monitoring capabilities. Although Malcolm excels in general network traffic analysis, its developers recognize a specific demand within the community for tools that deliver insights into protocols employed in industrial control systems (ICS), thereby addressing a critical niche in security monitoring. This focus on ICS enhances the platform’s relevance in sectors where such systems are vital for operational integrity and safety.

SparrowIQ is a comprehensive network traffic monitoring solution crafted to enable IT teams to swiftly identify and resolve network problems while gaining insights into application performance and its impact on user experience. Featuring an acclaimed ‘resource efficient’ design, it integrates robust performance monitoring capabilities within a user-friendly and easily deployable framework, thereby reducing the administrative burden on overextended IT personnel. Tailored specifically for small to medium-sized enterprises, SparrowIQ meets the demands for high-quality monitoring solutions similar to those used by larger organizations, all while accommodating the limited technical resources, time, and financial constraints that these businesses often face. This innovative approach allows smaller firms to maintain competitive operational standards without the hefty investments typically associated with traditional monitoring systems. By streamlining the troubleshooting process, SparrowIQ empowers organizations to enhance their overall network performance and user satisfaction.

NetFlow Analyzer provides net admins with an easy way to understand bandwidth consumption, trends, applications and traffic anomalies. It visualizes traffic by network devices, interfaces, subnets, traffic segments, and end users. NetFlow Analyzer uses Cisco® NetFlow (IPFIX, NSEL and sFlow), and other compatible netflow-like protocols. It assists net admins in bandwidth monitoring, network traffic investigation and reports. Companies can optimize their networks and applications, plan for network expansion, reduce time spent on troubleshooting, diagnostics, and increase security. NetVizura allows users to define custom traffic to monitor based on IP subnets, traffic characteristics such as protocol and service used. You can monitor specific traffic for each unit of your network, such as remote sites, departments, and collections of regional offices, by identifying them using IP subnets.