Best Free System Monitoring 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 is an advanced monitoring solution designed to give in-depth visibility into essential IT infrastructure components like servers, networking equipment, and applications. It offers real-time data on system performance by monitoring critical indicators such as CPU load, memory usage, disk capacity, and network traffic. With its proactive alerting system and automated issue detection capabilities, OpManager empowers IT professionals to swiftly pinpoint and rectify problems, thereby maximizing system reliability and uptime. The platform's customizable dashboards and comprehensive reporting functionalities improve oversight and streamline resource management, positioning it as an indispensable tool for ensuring peak system efficiency.

Uptrends is all about cloud-based website performance that keeps track of performance, uptime, and functionality of your websites and APIs. The 24/7 monitoring service that proactively test your website and monitor multi-step transactions. Let’s face it—the Internet is a fragile thing. Stuff breaks or slows every now and then. Uptrends lets you know when it does and what exactly happened. Feel free to try Uptrends for 30 days with our free trial!

SuperOps is a next-generation, all-in-one PSA-RMM platform designed for ambitious MSPs looking to scale efficiently. Infused with AI-driven intelligence and smart automation, SuperOps offers a comprehensive suite of features, from IT documentation to project management, ensuring MSPs have everything they need in one place. Say goodbye to juggling multiple disconnected tools—SuperOps empowers MSPs to move beyond outdated, fragmented systems with a cloud-native platform built for simplicity and productivity. Experience a seamless, modern solution that streamlines operations and makes managing IT services effortless.

Cloud-based solution for observability that helps businesses manage and track workload and performance through a single dashboard. Monitor all the services you run on your cloud without compromising cost, granularity or scale. Groundcover is a cloud-native APM solution that makes observability easy so you can focus on creating world-class products. Groundcover's proprietary sensor unlocks unprecedented granularity for all your applications. This eliminates the need for costly changes in code and development cycles, ensuring monitoring continuity.

FirstWave’s NMIS is a network management system that provides fault, performance, configuration management, performance graphs, and threshold alerts. Business rules allow for highly specific notification policies that can be used with multiple notification methods. FirstWave also enables partners, including some of the world’s largest telcos and managed service providers (MSPs), to protect their customers from cyber-attacks, while rapidly growing cybersecurity services revenues at scale. FirstWave provides a comprehensive end-to-end solution for network discovery, management, and cybersecurity for its partners globally.

Tired of juggling multiple tools for server and website monitoring? Meet Xitoring , the modern SaaS platform designed to streamline your infrastructure oversight. With just one CLI command, you can set up comprehensive monitoring for countless servers and websites in minutes—no complex configurations required. At its core, Xitoring uses Xitogent , a lightweight agent that collects critical performance data directly from your servers. This ensures real-time insights into system health, helping you identify potential issues before they become problems. By automating routine tasks, Xitoring saves you time and effort, allowing you to focus on innovation. Our global network of probing nodes keeps your systems under constant surveillance. From network outages to resource overloads, we detect anomalies instantly and notify the right person via customizable alerts. This proactive approach minimizes downtime, enhances reliability, and boosts customer satisfaction.

With more than 50,000 customer installations across the five continents, Pandora FMS is a truly all-in-one monitoring solution, covering all traditional silos for specific monitoring: servers, networks, applications, logs, synthetic/transactional, remote control, inventory, etc. Pandora FMS allows you to quickly find and solve problems. It scales them so that they can be derived either from on-premise, multi-cloud, or both. You now have the ability to use your entire IT stack and analytics to solve any problem, even those that are difficult to find. You can control and manage any technology and application with more than 500 plugins, including SAP, Oracle, Lotus or Citrix, Jboss, VMware, AWS and SQL Server.

Igiko Management Tools is a web-based software that allows remote access to, management and monitoring of physical or virtual machines within a permissions-based security model. Igiko comes with a built-in remote gateway that allows you establish connections to your computers and VMs. The web console supports HTML5 RDP control, which allows remote desktops to be accessed from any web browser. The Igiko application, unlike most RMM tools is an agentless service. To provide remote access, monitoring, management and remote access capabilities to all local computers or VMs, you can only install it on one machine. Configuring and accessing the application globally is easy with embedded web server and tunnel-provider clients that have a dedicated DNS address on Igiko server. Igiko is ideal to small and medium businesses, hosting providers and software development and engineering firms, as well as home users and virtual labs.

TeamViewer, a popular remote support and access software, allows users to remotely connect and control computers or devices from anywhere on the planet. It is widely used to troubleshoot technical issues, manage IT services, and provide customer support. The software supports secure file sharing, real time collaboration, and remote desktop accessibility across multiple platforms, including Windows MacOS Linux iOS and Android. TeamViewer has a number of security features, including end-to-end encrypted connections and two-factor authentication. This ensures a safe and reliable remote connection. Individuals, IT professionals and large organisations use it to boost productivity, provide remote support and manage devices efficiently.

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.

Sematext Cloud provides all-in-one observability solutions for modern software-based businesses. It provides key insights into both front-end and back-end performance. Sematext includes infrastructure, synthetic monitoring, transaction tracking, log management, and real user & synthetic monitoring. Sematext provides full-stack visibility for businesses by quickly and easily exposing key performance issues through a single Cloud solution or On-Premise.

Monitor your servers, containers, and applications, in high-resolution and in real-time. Netdata collects metrics per second and presents them in beautiful low-latency dashboards. It is designed to run on all of your physical and virtual servers, cloud deployments, Kubernetes clusters, and edge/IoT devices, to monitor your systems, containers, and applications. It scales nicely from just a single server to thousands of servers, even in complex multi/mixed/hybrid cloud environments, and given enough disk space it can keep your metrics for years. KEY FEATURES: Collects metrics from 800+ integrations Real-Time, Low-Latency, High-Resolution Unsupervised Anomaly Detection Powerful Visualization Out of box Alerts systemd Journal Logs Explorer Low Maintenance Open and Extensible Troubleshoot slowdowns and anomalies in your infrastructure with thousands of per-second metrics, meaningful visualisations, and insightful health alarms with zero configuration. Netdata is different. Real-Time data collection and visualization. Infinite scalability baked into its design. Flexible and extremely modular. Immediately available for troubleshooting, requiring zero prior knowledge and preparation.

Better Stack brings all your observability needs under one roof to help you build and ship more reliable software, faster. Handle on-call scheduling, get clear, actionable alerts, and resolve issues quickly – all from a single tool that covers incident response, uptime checks, status pages, log management, and infrastructure monitoring. Designed to scale with your team, Better Stack unifies your alerting and monitoring workflows into a clean, powerful interface that boosts visibility and shortens response times. Key capabilities include an OpenTelemetry-native Kubernetes collector powered by eBPF, instant alerting, and dashboards built for collaboration. Powered by ClickHouse, Better Stack enables rapid-fire queries and seamless ingestion of massive, high-cardinality datasets. It turns your logs into structured, searchable data, giving you the ability to query everything using SQL – just like a single, unified database. With 100+ integrations, it fits right into your existing workflow, no extra effort needed.

IT performance monitoring does not just focus on monitoring CPU, memory, and network resources. eG Enterprise makes the user experience the center of your IT management and monitoring strategy. eG Enterprise allows you to measure the digital experience of your users and get deep visibility into the performance of the entire application delivery chain -- from code to user experiences to data center to cloud -- all from a single pane. You can also correlate performance across domains to pinpoint the root cause of problems proactively. eG Enterprise's machine learning and analytics capabilities enable IT teams to make smart decisions about right-sizing and optimizing for future growth. The result is happier users, increased productivity, improved IT efficiency, and tangible business ROI. eG Enterprise can be installed on-premise or as a SaaS service. Get a free trial of eG Enterprise today.

KACE is an endpoint management solution that offers a single point of control for managing IT systems across the entire organization. From initial deployment to ongoing maintenance, KACE is designed to fulfill all endpoint security and deployment needs—helping businesses quickly deploy, monitor, and manage their devices using a unified inventory database. KACE improves device security with on-demand hardware and software discovery, patch management, compliance reporting, and real-time monitoring of mobile endpoints. KACE is a Unified Endpoint Management solution that offers a single point of control for managing IT systems across the entire organization, inside or outside your network. This comprehensive solution takes the stress out of keeping devices secure and compliant so you can do more. Unified Endpoint Management by KACE. Where Next Meets Now.

Checkmk is an IT monitoring system that allows system administrators, IT managers and DevOps teams, to quickly identify and resolve issues across their entire IT infrastructure (servers and applications, networks, storage and databases, containers, etc. Checkmk is used daily by more than 2,000 commercial customers worldwide and many other open-source users. Key product features * Service state monitoring with nearly 2,000 checks 'outside the box' * Event-based and log-based monitoring * Metrics, dynamic Graphing, and Long-Term Storage * Comprehensive reporting incl. Accessibility and SLAs * Flexible notifications and automated alert handling * Monitoring business processes and complex systems * Software and hardware inventory * Graphical, rule-based configuration and automated service discovery These are the top use cases * Server Monitoring * Network Monitoring * Application Monitoring * Database Monitoring * Storage Monitoring * Cloud Monitoring * Container Monitoring

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.

StatusGator delivers timely information about critical dependencies so that DevOps, IT Help Desk, and Education teams can stay on top of downtime and react proactively. Features: Aggregated status pages with data from all your cloud vendors. Notifications on any status changes to Slack, Teams, SMS, and more.

This tool provides you with an overview of your server environment. It can also help you save money on operation monitoring by predicting bottlenecks in your virtualized environment. You can also generate policy-based alerts and capacity reports, as well as load forecasts. These virtualization platforms are supported by the product: - IBM Power Systems - VMware Nutanix - Proxmox - Huawei FusionCompute - OracleVM - Oracle Solaris LDOM and CDOM, as well as the Global Zone - oVirt / RedHat Virtualization (RHV) - Microsoft Windows Server and Microsoft Hyper-V - XenServer, Citrix Hypervisor - Hitachi Compute blade - Amazon Web Services Google Cloud - Microsoft Azure - Kubernetes - Red Hat OpenShift Apache CloudStack - PostgreSQL database - Oracle Database - Microsoft SQL Server

UltraDNS is a robust, cloud-based authoritative DNS service designed for enterprises, providing reliable and swift query responses for websites and essential online resources. This managed DNS solution guarantees complete website uptime and incorporates advanced security features for enhanced protection. As users around the globe demand uninterrupted and secure digital interactions, the complexities of DNS management have escalated significantly. The rise of Internet of Things (IoT) devices, coupled with various online threats, has made it challenging for organizations to devise an effective DNS strategy tailored to their IT requirements. It is increasingly difficult to maintain a knowledgeable in-house team for DNS management, and securing the necessary resources to establish a coherent strategy that aligns with current Internet challenges is often unfeasible. Ensure your website and digital assets remain accessible at all times with UltraDNS, which is supported by a commitment to 100% uptime and top-tier service-level agreements, all on a worldwide platform. This commitment empowers businesses to focus on their core operations while trusting that their online presence is managed by experts in the field.

Anodot uses AI to deliver autonomous analytics at enterprise scale across all data types and in real-time. We provide business analysts with the ability to control their business, without the limitations of traditional Business Intelligence. Our self-service AI platform runs continuously to eliminate blind spots and alert incidents, and investigate root cause. Our platform uses machine learning algorithms that are patent-pending to identify issues and correlate them across multiple parameters. This eliminates business insight latency and supports quick, smart business decision-making. Anodot serves over 100 customers in the digital transformation industry, including eCommerce, FinTech and AdTech, Telco and Gaming. This includes Microsoft, Lyft and Waze. Anodot was founded in 2014 in Silicon Valley and Israel. There are also sales offices around the world.

Cisco ThousandEyes is an innovative platform for network intelligence that equips organizations with profound insights into digital interactions across various environments, including the internet, cloud, and enterprise networks. Utilizing sophisticated monitoring and analytics capabilities, ThousandEyes enables businesses to identify, troubleshoot, and rectify performance challenges that affect essential applications, websites, and services. Its extensive array of tools delivers valuable information regarding network performance, application delivery, and user engagement, allowing organizations to maintain uninterrupted connectivity and enhance user experiences. This platform is widely embraced by Fortune 500 companies and SaaS providers alike, establishing itself as a reliable solution for navigating the intricacies of contemporary hybrid and multi-cloud landscapes. Additionally, ThousandEyes empowers IT teams by equipping them with the tools needed to proactively manage, optimize, and refine their digital infrastructures for improved operational efficiency.

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.