# Nagios: Free Open Source Alternative to Auvik, LogicMonitor, Opsgenie

Canonical: https://caniforkit.com/fork/nagios
Last updated: 2026-11-07

Nagios (Open Source, Open Source) replaces Auvik, LogicMonitor, Opsgenie, Paessler PRTG. Free open source IT monitoring solution for servers, networks, and applications. Trusted by 1M+ users worldwide with powerful alerting and enterprise-grade features.

## Tool Specifications
- **Tool Name**: Nagios
- **Type**: Open Source Project
- **License**: Open Source
- **Official Website**: https://www.nagios.org/
- **GitHub Repository**: https://github.com/nagiosenterprises/nagioscore
- **GitHub Stars**: ★ 2.1k
- **Runs On**: Self-host
- **Maintenance Status**: nov 2026
- **Platforms**: web, self-hosted, docker to self-host
- **Data Storage**: All application data and configuration live on your own server or local database.
- **Installation**: Clone https://github.com/nagiosenterprises/nagioscore or deploy with Docker Compose
- **Setup Requirements**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **The Catch / Limitation**: Requires self-hosting setup, updates, and server maintenance compared to managed Auvik.

## Paid SaaS Applications Replaced (7)
Replacing these paid tools with Nagios saves up to $245/mo ($2,940/yr) in software subscriptions:

| Replaced Software | Category | SaaS Price | Comparison Guide |
| --- | --- | --- | --- |
| [Auvik](https://caniforkit.com/auvik) | [monitoring](https://caniforkit.com/category/monitoring) | $35/mo | [Compare Auvik vs Nagios](https://caniforkit.com/vs/auvik-vs-nagios) |
| [LogicMonitor](https://caniforkit.com/logicmonitor) | [monitoring](https://caniforkit.com/category/monitoring) | $35/mo | [Compare LogicMonitor vs Nagios](https://caniforkit.com/vs/logicmonitor-vs-nagios) |
| [Opsgenie](https://caniforkit.com/opsgenie) | [monitoring](https://caniforkit.com/category/monitoring) | $35/mo | [Compare Opsgenie vs Nagios](https://caniforkit.com/vs/opsgenie-vs-nagios) |
| [Paessler PRTG](https://caniforkit.com/paessler-prtg) | [monitoring](https://caniforkit.com/category/monitoring) | $35/mo | [Compare Paessler PRTG vs Nagios](https://caniforkit.com/vs/paessler-prtg-vs-nagios) |
| [Site24x7](https://caniforkit.com/site24x7) | [monitoring](https://caniforkit.com/category/monitoring) | $35/mo | [Compare Site24x7 vs Nagios](https://caniforkit.com/vs/site24x7-vs-nagios) |
| [SolarWinds](https://caniforkit.com/solarwinds) | [monitoring](https://caniforkit.com/category/monitoring) | $35/mo | [Compare SolarWinds vs Nagios](https://caniforkit.com/vs/solarwinds-vs-nagios) |
| [Zabbix](https://caniforkit.com/zabbix) | [monitoring](https://caniforkit.com/category/monitoring) | $35/mo | [Compare Zabbix vs Nagios](https://caniforkit.com/vs/zabbix-vs-nagios) |

## Frequently Asked 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 is the trade-off or limitation of using Nagios?
Requires self-hosting setup, updates, and server maintenance compared to managed Auvik.

## Related

- [Self-Hosted Open Source Directory](https://caniforkit.com/self-hosted)
- [All Paid SaaS Alternatives Index](https://caniforkit.com/alternatives)
- [Software Categories Directory](https://caniforkit.com/categories)
- [Homepage](https://caniforkit.com)