Nagios
Free open source IT monitoring solution for servers, networks, and applications. Trusted by 1M+ users worldwide with powerful alerting and enterprise-grade features.
Technical Profile & Specs
verified 2026-11-07
- Cost
- $0 / forever (Open Source)
- License
- Open Source
- Hosting Model
- Self-host (your server)
- Platforms
- webself-hosteddocker to self-host
- Installation
- Clone https://github.com/nagiosenterprises/nagioscore or deploy with Docker Compose
- Operational Setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- Where Your Data Lives
- All application data and configuration live on your own server or local database.
- The Catch / Trade-off
- Requires self-hosting setup, updates, and server maintenance compared to managed Auvik.
Replaces 7 paid apps
up to $245/mo ($2,940/yr) in subscriptions
Nagios FAQ
Common questions
Is Nagios free and open source?+
Nagios is an open-source tool licensed under Open Source that runs on self-host. Free open source IT monitoring solution for servers, networks, and applications. Trusted by 1M+ users worldwide with powerful alerting and enterprise-grade features.
What paid software does Nagios replace?+
Nagios serves as a free replacement for 7 paid SaaS applications: Auvik, LogicMonitor, Opsgenie, Paessler PRTG, Site24x7, SolarWinds, Zabbix, saving up to $245/month ($2,940/year) in subscription bills.
How do you install and set up Nagios?+
Installation: Clone https://github.com/nagiosenterprises/nagioscore or deploy with Docker Compose. Setup notes: Deploy via Docker or binary release from GitHub and configure environment variables.
What is the catch or trade-off with Nagios?+
Requires self-hosting setup, updates, and server maintenance compared to managed Auvik.