Server and infrastructure monitoring
Host and service monitoring, from the long-running self-hosted systems to hosted agents that report CPU, disk and process health.
Lists: Server monitoring tools in 2026 Best server monitoring tools in 2026 Open source server monitoring tools in 2026 Server monitoring tools with a free plan in 2026 Self-hosted server monitoring tools in 2026
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Agentless monitoring system from the Apache Software Foundation that polls servers, databases, middleware, network devices and websites through templates, with built-in alerting.
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Lightweight self-hosted server monitor: a small agent reports CPU, memory, disk, network and Docker container stats to a hub that keeps history and sends alerts.
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Hosted monitoring for servers, containers and Kubernetes built on an open source agent, with uptime checks, dashboards and alert rules.
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IT infrastructure and network monitoring platform that runs Nagios-compatible plugins, offered as open source and as commercial on-premises and cloud editions.
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Infrastructure monitoring for servers, networks, cloud and containers with automatic service discovery; the base edition is open source and paid editions add more.
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Linux server monitoring with a lightweight agent, real-time dashboards and alerts, plus uptime monitors and a Terraform provider.
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Cross-platform system monitor in Python that shows CPU, memory, disk, network, processes and containers in a terminal, a web UI or a REST API.
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Monitoring system that grew out of Nagios: checks hosts and services with plugins, scales across distributed zones, and is configured through files or an API.
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Hosted monitoring for hybrid infrastructure: collectors discover networks, servers, cloud services and containers and alert on metrics and logs.
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On-premises network and server monitoring for routers, switches, firewalls, Windows and Linux hosts and virtual machines.
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Small Unix daemon that watches processes, files, filesystems and hosts and can restart a service or send an alert when a check fails. M/Monit is the paid central console.
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Hosted Linux server monitoring with a one-command install of an open source OpenTelemetry-based agent, default alert rules, and alerts by email, Telegram, Discord, Slack, ntfy, webhook or PagerDuty.
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Networked resource monitoring: a master polls lightweight node agents and their plugins and graphs server metrics over time.
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Fork of the Nagios 4 core with performance improvements, compatible with Nagios configuration files and plugins.
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Long-running open source host and service checker with a large plugin ecosystem; Nagios XI is the commercial edition built on it.
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Per-second metrics for servers, containers and applications from an agent with built-in dashboards and alerts, plus the optional hosted Netdata Cloud.
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Network and infrastructure management system with SNMP discovery, network maps, server agents and event correlation; an Enterprise edition adds support and features.
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Self-hosted monitoring panel for small server fleets: agents report host status and resource use, and the panel can run uptime checks and remote tasks.
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Monitoring suite that manages Naemon checks through a web interface, with Checkmk and Grafana integration; community and enterprise editions.
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Network management platform for fault and performance monitoring at scale; Horizon is the open source edition and Meridian the supported one.
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ITRS infrastructure monitoring for servers, networks, cloud and applications, with Nagios-compatible checks and a REST API.
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Monitoring for servers, networks, applications and logs, with an open source community edition and a commercial enterprise edition.
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Windows-based network and server monitoring from Paessler built around sensors for SNMP, WMI, flows, ping and HTTP, with maps and dashboards.
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Web dashboard for hard drive S.M.A.R.T. data that tracks disk health over time and warns before a drive fails.
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Monitoring event pipeline for dynamic infrastructure: agents run checks, and filters and handlers route the results to alerting and metrics tools, all managed as code.
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Hosted server monitoring that collects metrics and logs through one agent, with dashboards and alerts and little setup.
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Zoho's monitoring suite for websites, servers, networks, applications and cloud, with synthetic transactions and RUM; plain uptime checks have a free plan.
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Suite of network, server, database and application monitoring products, sold as self-hosted software and as the SaaS SolarWinds Observability.
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Progress network monitoring for devices, servers and applications, with layer 2/3 discovery and interactive network maps.
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Long-standing system and network monitor that shows host and service status on a color-coded web page, with client agents for host data.
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Open source monitoring for networks, servers, VMs, applications and cloud, using agents, SNMP and templates with trigger-based alerting; Zabbix Cloud is the hosted option.
No tools match every filter. to see the full list.