Long-running open source host and service checker with a large plugin ecosystem; Nagios XI is the commercial edition built on it.
Pricing and hosting
- Pricing
- Free plan
- Open source
- Yes (GPL-2.0)
- Self-hosted
- Yes
- Launched
- 1999
- Status
- Active
- Website
- nagios.org
Plans and prices change; check the tool's own site before you decide.
What it does
Server and infrastructure monitoring checklist
6 of 10 confirmed in Nagios Core's own documentation. The same checklist is used for every tool in Infrastructure.
- Host agent Yes
- Agentless checks Yes
- Windows hosts Yes
- Auto-discovery Not confirmed
- Process and service checks Yes
- Log collection Not confirmed
- Containers Not confirmed
- Alerting with notifications Yes
- Dashboards Not confirmed
- Plugins or integrations Yes
Agent is NCPA; dashboards and auto-discovery are Nagios XI features, not Core.
Checked against: nagios.org, github.com
Alternatives to Nagios Core
Other server and infrastructure monitoring tools. See all 31.
-
Apache HertzBeat Agentless monitoring system from the Apache Software Foundation that polls servers, databases, middleware, network devices and websites through templates, with built-in alerting. -
Beszel 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. -
Bleemeo Hosted monitoring for servers, containers and Kubernetes built on an open source agent, with uptime checks, dashboards and alert rules. -
Centreon IT infrastructure and network monitoring platform that runs Nagios-compatible plugins, offered as open source and as commercial on-premises and cloud editions. -
Checkmk Infrastructure monitoring for servers, networks, cloud and containers with automatic service discovery; the base edition is open source and paid editions add more. -
fivenines Linux server monitoring with a lightweight agent, real-time dashboards and alerts, plus uptime monitors and a Terraform provider. -
Glances 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. -
Icinga 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. -
LogicMonitor Hosted monitoring for hybrid infrastructure: collectors discover networks, servers, cloud services and containers and alert on metrics and logs. -
ManageEngine OpManager On-premises network and server monitoring for routers, switches, firewalls, Windows and Linux hosts and virtual machines. -
Munin Networked resource monitoring: a master polls lightweight node agents and their plugins and graphs server metrics over time. -
Naemon Fork of the Nagios 4 core with performance improvements, compatible with Nagios configuration files and plugins.