Best Free SNMP Monitoring Tools 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.

Paessler PRTG is an all-inclusive monitoring solution with an intuitive, user-friendly interface powered by a cutting-edge monitoring engine. It optimizes connections and workloads, reduces operational costs, and prevents outages. It also saves time and controls service level agreements (SLAs). This solution includes specialized monitoring features such as flexible alerting, cluster failover, distributed monitoring, maps, dashboards, and in-depth reporting.

Nagios Core, the monitoring and alerting engine, is the core application that powers hundreds of Nagios project development. Nagios Core is the event scheduler, event processor, alert manager, and monitor for elements. It has several APIs that can be used to extend its capabilities to do additional tasks. It is implemented in C for performance reasons and is designed to run natively under Linux/*nix systems.

Zabbix stands out as a premier enterprise-level tool created for the real-time observation of vast amounts of metrics gathered from numerous servers, virtual machines, and network devices. As an Open Source platform, Zabbix offers its powerful features at no cost. It automatically identifies problematic states within the incoming flow of metrics, eliminating the need for continuous manual monitoring. The built-in web interface allows for various visual presentations of your IT landscape, enhancing usability. With Zabbix's Event correlation mechanism, you can reduce the influx of repetitive notifications and concentrate on identifying the root causes of issues. It facilitates automated monitoring for large, dynamic environments and supports the development of a distributed monitoring system while maintaining centralized oversight. Furthermore, Zabbix can seamlessly integrate with all components of your IT infrastructure, and users can access its comprehensive functionalities from external applications via the Zabbix API. This integration capability ensures that Zabbix remains adaptable to a variety of operational needs.

AKIPS delivers the largest-scaling, fully featured, secure on-prem, multi-vendor network-monitoring system for the enterprise market. AKIPS Network Monitor provides unmatched features, scale and visibility of critical, real-time, and historical performance metrics and logs – from the heart of the data centre all the way to the end user. AKIPS allows network engineers to be proactive instead of firefighting, and to detect, analyse and rectify issues before any disruption to the business occurs.

TSMS offers a straightforward and flexible approach to overseeing the entire IT landscape. Timely detection of any irregularities across all IT systems, devices, networks, and applications is vital for organizations to avert costly downtimes. As long as devices utilize TCP/IP and/or SNMP protocols, they can be effectively monitored by TSMS. The monitoring capabilities of TSMS can be tailored to meet your specific needs, whether it involves simple downtime alerts or comprehensive oversight of critical servers and business operations. Users of TSMS can access detailed reports that provide insights into the performance and availability of their entire IT infrastructure. This system addresses essential requirements such as safeguarding IT processes, resolving potential incidents, and generating reports related to these events. By utilizing TSMS, organizations can ensure their IT environment is proactively monitored around the clock, significantly reducing the likelihood of incidents occurring. Overall, TSMS not only enhances security but also improves operational efficiency across IT operations.

Cacti offers a powerful and flexible framework for operational monitoring and fault management, catering to users globally. It serves as a comprehensive solution for network graphing, leveraging RRDTool's impressive data storage and graphing capabilities. The platform features a distributed and resilient data collection system, along with sophisticated automation tools for managing devices, graphs, and trees using templates. In addition to its various data acquisition methods, Cacti supports extensibility through plugins, features role-based management for users, groups, and domains, and includes a theming engine with multilingual support right from the start. All of these functionalities are integrated into a user-friendly interface that is suitable for everything from small LAN setups to intricate networks comprising thousands of devices. To operate Cacti, users need MySQL, PHP, RRDTool, net-snmp, and a compatible web server like Apache or IIS. Central to Cacti's architecture and database management is the concept of devices and device templates, which play a crucial role in its operation. Moreover, the system's adaptability makes it a preferred choice for organizations seeking to optimize their network monitoring processes.

The Dude network monitor serves as a comprehensive network management solution that autonomously scans designated subnets to identify various devices regardless of their manufacturer, subsequently creating and displaying a dynamic network map through a user-friendly interface. It actively oversees the status of devices and connections utilizing SNMP, ICMP, DNS, and TCP protocols, while also providing detailed metrics and visual representations of individual link usage, alongside issuing immediate alerts in the event of service interruptions. This application comes equipped with a collection of scalable SVG icons for devices, allows for the inclusion of custom icons and background images, and permits users to manually draw custom maps and add devices as needed. With a streamlined installation process that can be executed via a Windows installer or 32-bit Wine, the platform supports both local client and remote server configurations, promoting a versatile approach to deployment. Additionally, the built-in remote control tools enhance the efficiency of device management operations, and the automated discovery and mapping features significantly cut down the time required for initial setup, making it an invaluable asset for network administrators. Furthermore, its intuitive design and robust functionality ensure that users can effectively manage their networks with minimal hassle.

Icinga is an internet monitoring system that checks the availability of your network resources and notifies users when there are outages. It also generates performance data for reporting. Icinga is flexible and extensible. It can monitor complex environments in multiple locations. Icinga 2 is the monitoring server and requires Icinga Web 2 on top in your Icinga Stack. You can manage the configuration with the Icinga Director or config management tools. Plain text is also available within the Icinga DSL. Find solutions, take action and become a problem-solver. Flexibility is key. Keep curious, stay passionate, and stay in the loop. Tackle your monitoring challenge. The Icinga stack consists of six core strengths that cover all aspects related to monitoring. You can get valuable insights, on-time notifications and eye-opening visuals as well as analytics. Icinga integrates easily into your systems and gives you the power of automating your tasks.

Today's bandwidth-unconstrained, encrypted, cloud centric networks make it impossible to separate traffic analytics and security and investigation activities. Trisul can help organizations of all sizes implement full-spectrum deep networking monitoring that can serve as a single source of truth for performance monitoring and network design, security analytics, threat detection and compliance. Traditional approaches based upon SNMP, Netflow Agents, Agents, and Packet Capture tend to have a narrow focus, rigid vendor-supplied analysis, and a narrow focus. Trisul is the only platform that allows you to innovate on a rich, open platform. It includes a tightly integrated backend database store and a web interface. It is flexible enough to connect to a different backend, or to drive Grafana and Kibana UIs. Our goal is to pack as many performance options as possible into a single node. To scale larger networks, add more probes or hubs.

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.

Easy-IP is a swift, web-based solution for IP Address Management (IPAM) that streamlines the oversight of your complete IP network infrastructure. Equipped with a robust SNMP Network Discovery engine, Easy-IP allows you to keep a precise and current inventory of all your network devices. It facilitates the dynamic allocation and tracking of IP addresses, effectively eliminating the risk of duplicate IP address errors. This solution can significantly lower IP administration costs by as much as 50%. Additionally, it supports the management of multiple tenants and overlapping IP address spaces. With Easy-IP, you can monitor all your IPv4/IPv6 subnets, VLANs, IP addresses, DNS hostnames, and crucial network devices, including routers, switches, and servers. The platform features an intuitive HTML5 web interface, automated IPv4 and IPv6 subnet allocation, and rapid SNMP network auto-discovery. It also offers granular role-based access rights, advanced import/export functions, and powerful full-text search capabilities for easier navigation. Flexible management reports and user-defined custom fields enhance its functionality, while the inclusion of a web services SOAP API, an SNMP MIB browser, and a switch port mapper provide comprehensive tools for effective network management. This combination of features makes Easy-IP an indispensable asset for any network administrator looking to optimize their operations.

Zenoss Cloud stands out as a pioneering SaaS-based intelligent platform for IT operations management, capable of streaming and normalizing all machine data, which fosters the development of context essential for averting service disruptions in intricate and contemporary IT settings. By utilizing Zenoss, enterprises can redirect their focus towards business growth, alleviating the burdens that hinder their architecture and operations teams. Organizations leveraging Zenoss are empowered to eradicate infrastructure blind spots, anticipate the repercussions on business services prior to outages, and expedite incident resolution, all while scaling to meet the demands of their operations. Designed specifically for today's IT infrastructures, Zenoss Cloud transforms the way businesses manage their systems and services. Together, we can explore potential collaborations to enhance operational efficiency and resilience.

NetXMS serves as a robust, open-source solution for managing networks, capable of overseeing entire IT infrastructures ranging from SNMP-compatible devices like routers and switches to server applications. The system boasts functionalities such as automated discovery of network devices and detailed visualization of network topology at both IP and link levels, which delivers a comprehensive overview of the network landscape. It is compatible with a variety of protocols, including SNMP, MQTT, EtherNet/IP, MODBUS-TCP, and OPC UA, making it an excellent fit for a wide range of industrial use cases. Its design is modular and extensible, allowing users to tailor the system to their specific organizational requirements. Additionally, NetXMS offers versatile event processing capabilities, enabling the execution of external commands, the running of internal scripts, and the dispatch of notifications through various channels. The platform also prioritizes secure and authenticated communication, ensuring that both on-premises and cloud implementations are safeguarded. Overall, NetXMS stands out for its adaptability and comprehensive feature set, making it a valuable tool for network administrators.

Observium is a low maintenance auto-discovery network monitoring platform that supports a wide variety of device types, platforms, and operating systems, including Cisco, Windows and Linux. Observium focuses its efforts on providing a simple, intuitive, yet powerful interface that provides information about the health and status your network. Observium was created and maintained by a team comprised of network engineers and system administrators. Observium Community is free and available to all. It receives updates and new features twice a year. For a small annual fee, Observium Professional gives priority access to daily updates as well as new features. Observium increases visibility of your network infrastructure by automatically collecting information about protocols and services that you may not otherwise be able to monitor.

Dynamic scalability is essential for effective data processing, allowing the monitoring of numerous data points through a distributed, tiered architecture. An event-driven framework enhances the capabilities of service polling and data collection, enabling versatile integration of workflows. OpenNMS serves as a robust open-source network monitoring tool that allows users to visualize and oversee their local and distributed networks seamlessly. With a focus on comprehensive fault detection, performance evaluation, traffic oversight, and alarm generation, OpenNMS consolidates these capabilities into a single platform. Its high level of customization and scalability ensures that OpenNMS can be effectively integrated with essential business applications and workflows, making it a vital asset for organizations aiming to optimize their network management. This adaptability enhances the overall efficiency of monitoring processes, ensuring that businesses can respond swiftly to network challenges.