Best Network Bandwidth Monitoring Tools for Linux of 2026

OpManager is the ideal end-to-end network monitoring tool for your organization's network. With OpManager, you can keep a close eye on health, performance, and availability levels of all network devices. This includes monitoring switches, routers, LANs, WLCs, IP addresses and firewalls. Insights into your hardware health and performance; monitor CPU, memory, temperature, disk usage, and more to improve efficiency. Seamlessly manage faults and alerts with instant notifications and detailed logs. Streamlined workflows facilitate easy set-up to execute quick diagnosis and corrective measures. The solution also comes with powerful visualization tools such as business views, 3d data center views, topology maps, heat maps, and customizable dashboards. Get proactive in capacity planning and decision-making with over 250 predefined reports covering all important metrics and areas in your network. Overall, OpManager's detailed management capabilities make it the ideal solution for IT administrators to achieve network resiliency 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.

Datadog is the cloud-age monitoring, security, and analytics platform for developers, IT operation teams, security engineers, and business users. Our SaaS platform integrates monitoring of infrastructure, application performance monitoring, and log management to provide unified and real-time monitoring of all our customers' technology stacks. Datadog is used by companies of all sizes and in many industries to enable digital transformation, cloud migration, collaboration among development, operations and security teams, accelerate time-to-market for applications, reduce the time it takes to solve problems, secure applications and infrastructure and understand user behavior to track key business metrics.

IT teams, MSPs, and network engineers use Obkio to gain complete visibility into network performance, whether it's happening in the office, across a hybrid workforce, or in the cloud. Obkio is a Network Performance Monitoring (NPM), observability, and diagnostics platform that works by deploying lightweight monitoring agents at any location, with no special hardware required. These agents continuously measure latency, jitter, packet loss, and bandwidth, while running Visual Traceroutes to map performance across the full network path. The platform covers SD-WAN, MPLS, and VoIP/UC monitoring, along with visibility into multi-site and distributed networks. Application performance monitoring (APM) rounds out the picture with HTTP, Web, and Teams-based synthetic tests. A standout feature, Obkio Insight, automates root-cause diagnostics, quickly showing whether a problem sits within the internal network, with an ISP, or with a third-party provider, backed by concrete performance data. Because it deploys in minutes, Obkio gives teams fast answers instead of raw data to sift through. The result: less time troubleshooting, stronger SLA validation, and clear proof of whether the network performance they're paying for matches what they're actually getting.

BitMeter OS is a completely free and open-source tool designed for monitoring bandwidth, functioning seamlessly across Windows, Linux, and macOS platforms. It effectively tracks internet and network usage, providing insights through a web-based interface or command-line options. The web interface features real-time graphs and charts that refresh every second, showcasing ongoing connection activity. Users can delve into specific bandwidth utilization for chosen dates, with the capability to export this data into spreadsheet formats. The History pane offers a visualization of usage trends across various time frames, including hours, days, and months. Furthermore, BitMeter OS empowers users to establish customizable alerts that trigger when internet usage exceeds set limits. An additional calculator utility is available to estimate both upload and download times alongside data transfer capacities. The Preferences pane allows for personalization of the interface, complete with a built-in RSS feed for updates. It is important to note that BitMeter can only monitor network traffic that is directed to or from the computer it is installed on; thus, for monitoring multiple machines, installation on each one is necessary. This ensures that users can fully utilize its capabilities across their networked devices.

Monitors all mission-critical infrastructure components, including services, applications, operating systems, network protocols and metrics, as well as network infrastructure. There are hundreds of third-party add-ons that allow for the monitoring of virtually all of your in-house services and applications. This dashboard provides a central view of all IT operations and business processes. The dashboards are a powerful way to quickly access third-party data and monitoring information at a glance. Views allow users to quickly access the most relevant information. Organizations can plan for infrastructure upgrades with automated, integrated trending graphs and capacity planning graphs before they are caught by surprise by outdated systems. IT staff, business stakeholders and end-users receive alerts via email or text message. They provide outage details so that they can resolve issues immediately.

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.