Best Free Server 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 serves as a powerful monitoring solution for servers, delivering real-time data regarding the performance and condition of both physical and virtual systems. It monitors key indicators, including CPU load, memory usage, disk availability, and network efficiency, allowing IT departments to quickly spot and rectify problems. With its proactive alert system, automated fault identification, and comprehensive reporting capabilities, OpManager guarantees maximum server uptime and dependability. The platform's customizable dashboards and user-friendly interface improve visibility and simplify server management, positioning it as a vital tool for achieving optimal server performance.

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.

ManageEngine Applications Manager is an enterprise-ready tool built to monitor a company's complete application ecosystem. Our platform enables IT and DevOps teams to have access to all of their application stack's dependent components. Monitoring the performance of mission-critical online applications, web servers, databases, cloud services, middleware, ERP systems, communications components, and other systems is simplified with Applications Manager. It contains a range of capabilities that help to expedite the troubleshooting process and minimize MTTR. It's a great tool to resolve performance issues before they harm application end users. Applications Manager has a fully functional dashboard that can be customized to provide quick performance information. By setting alerts, the monitoring tool continually monitors the application stack for performance issues and notifies the appropriate staff without delay. Applications Manager helps transform performance data into meaningful insights by combining this with advanced machine learning.

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.

Watchman Tower provides robust monitoring solutions designed to keep your websites and servers running smoothly around the clock. The platform continuously checks uptime and response times, providing instant notifications across multiple channels, including Slack, email, SMS, and webhooks. With its lightweight Warden agent, Watchman Tower monitors server health by tracking CPU load, memory, disk space, and running processes. Additional features include SSL certificate monitoring and domain expiry alerts, helping prevent costly downtime. Users can share real-time uptime statuses and incident updates via a public status page with a custom domain. The platform integrates seamlessly with popular collaboration tools like Slack, Trello, and Discord to streamline incident response. Backed by over 50,000 websites monitored and millions of notifications sent, Watchman Tower boasts a 99.9% uptime guarantee. Its intuitive dashboard and simple pricing plans make it suitable for freelancers, teams, and agencies alike.

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.

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.

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!

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

WebSitePulse allows you to monitor your web assets remotely and independently. Uptime monitoring, website monitoring and server monitoring are some of the most popular services.

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.

VirtualMetric is a comprehensive data monitoring solution that provides organizations with real-time insights into security, network, and server performance. Using its advanced DataStream pipeline, VirtualMetric efficiently collects and processes security logs, reducing the burden on SIEM systems by filtering irrelevant data and enabling faster threat detection. The platform supports a wide range of systems, offering automatic log discovery and transformation across environments. With features like zero data loss and compliance storage, VirtualMetric ensures that organizations can meet security and regulatory requirements while minimizing storage costs and enhancing overall IT operations.

Telegraf is an open-source server agent that helps you collect metrics from your sensors, stacks, and systems. Telegraf is a plugin-driven agent that collects and sends metrics and events from systems, databases, and IoT sensors. Telegraf is written in Go. It compiles to a single binary and has no external dependencies. It also requires very little memory. Telegraf can gather metrics from a wide variety of inputs and then write them into a wide range of outputs. It can be easily extended by being plugin-driven for both the collection and output data. It is written in Go and can be run on any system without external dependencies. It is easy to collect metrics from your endpoints with the 300+ plugins that have been created by data experts in the community.

Service Watch provides Digital Experience Monitoring (DEM), for apps, services, as well as the networks they depend on. IT can have complete visibility and increase employee productivity by combining passive and active monitoring in one holistic solution. You can troubleshoot network performance and detect outages.

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

The Server Check Monitoring System continuously monitors your websites as well as other internet-based services (Ping. SMTP. IMAP. FTP. You'll be the first to know about any outages. You don't want to lose more visitors due to downtime. Server Check's 10-monitor free version lets you start monitoring in just five minutes! Alerts are sent to all admins via email, SMS, and visual alerts when something goes wrong. Server Check will alert you to the problem so you can correct it. Quick setup of all the most common protocols, including HTTP & HTTPS. You can monitor them all and avoid any outages that could cause customers to lose their business. View statistics for each monitor, response times graphs, outage duration reports, outage length reports and web-based stats. You can also track down uptime and downtime over 12 months.

Enhance your metrics and alerting capabilities using a top-tier open-source monitoring tool. Prometheus inherently organizes all data as time series, which consist of sequences of timestamped values associated with the same metric and a specific set of labeled dimensions. In addition to the stored time series, Prometheus has the capability to create temporary derived time series based on query outcomes. The tool features a powerful query language known as PromQL (Prometheus Query Language), allowing users to select and aggregate time series data in real time. The output from an expression can be displayed as a graph, viewed in tabular format through Prometheus’s expression browser, or accessed by external systems through the HTTP API. Configuration of Prometheus is achieved through a combination of command-line flags and a configuration file, where the flags are used to set immutable system parameters like storage locations and retention limits for both disk and memory. This dual method of configuration ensures a flexible and tailored monitoring setup that can adapt to various user needs. For those interested in exploring this robust tool, further details can be found at: https://sourceforge.net/projects/prometheus.mirror/

With a simple command, you can install the monitoring agent across all your servers without any complex configurations, enabling you to begin monitoring in just minutes. This tool allows you to oversee your server's infrastructure usage effectively, helping to avert downtime and performance challenges. A collection of over 40 plugins is readily available, covering essential metrics like CPU, Process, Network, NGiNX, Disk I/O, and many others. Server logs play a crucial role in diagnosing problems and preventing them from occurring within your infrastructure. You can utilize our sophisticated log search feature or take advantage of the live tail option for real-time insights. Are you aware of the cleanliness of your IP space? It's important to ensure your emails avoid being marked as spam. Our user-friendly control panel is customizable, offering an enhanced and enjoyable experience. Additionally, we can monitor various endpoints including HTTP(S), TCP, and ICMP (ping), ensuring you receive immediate alerts about any downtime affecting your web services. By leveraging these features, you can maintain optimal performance and reliability across your entire server environment.

Manage the efficiency and performance of your cloud operations seamlessly. With NetApp Cloud, you gain comprehensive insight into your applications and infrastructure. Utilizing Cloud Insights, you can effectively monitor, troubleshoot, and enhance all resources across your entire tech stack, whether hosted on-premises or in the cloud. Safeguard your most crucial asset—data—from ransomware attacks by leveraging early detection systems and automated threat responses. You can also receive alerts about potential misuse or theft of vital intellectual property by malicious actors, both from within and outside your organization. Maintain corporate compliance through audits of access and usage patterns related to your essential data, whether it resides on-premises or in the cloud. Achieve full-stack visibility over your infrastructure and applications from a multitude of collectors, providing a centralized overview. You won’t have to rush to discover new monitoring solutions each time a novel platform is integrated into your organization, allowing you to focus on innovation and growth instead. This streamlined approach ensures that you can respond promptly to any challenges that may arise.

Quickly establish and oversee a diverse array of checks, such as website uptime, ping responses, socket connections, databases, messaging queues, application servers, and custom configurations. Effortlessly configure alerts via SMS and email. An innovative noise reduction feature significantly reduces superfluous notifications by merging similar incidents, silencing systems with known problems, and lowering the occurrence of false alarms. Gain insights into the status and real-time visibility of your applications and business services. It clearly indicates open incidents and problems that need your focus. You can group and monitor several applications and IT systems, including databases, web servers, application servers, and messaging queues, as a unified application. Happy Apps provides an overall status for the grouped application alongside the status of each individual component. Additionally, users can explore dependency maps that illustrate how individual IT systems influence other applications, enhancing their understanding of interactions. This comprehensive approach ensures that users have a holistic view of their IT environment, facilitating better decision-making and faster issue resolution.

Ploi is a tool that makes life easier for developers. Ploi takes the hard work out of your hands so you can concentrate on what you love: building your application.

Sedai intelligently finds resources, analyzes traffic patterns and learns metric performance. This allows you to manage your production environments continuously without any manual thresholds or human intervention. Sedai's Discovery engine uses an agentless approach to automatically identify everything in your production environments. It intelligently prioritizes your monitoring information. All your cloud accounts are on the same platform. All of your cloud resources can be viewed in one place. Connect your APM tools. Sedai will identify and select the most important metrics. Machine learning intelligently sets thresholds. Sedai is able to see all the changes in your environment. You can view updates and changes and control how the platform manages resources. Sedai's Decision engine makes use of ML to analyze and comprehend data at large scale to simplify the chaos.