Free
Free
Nagios.org promotes Nagios Core as free open source IT monitoring with public downloads.
- Access
- Nagios.org promotes Nagios Core as free open source IT monitoring with public downloads.
Finding the possibilities
Nagios
● Identity checkedMonitoring · Vendor site 2026-10-04
Nagios Core is a free open source monitoring platform for servers, networks, applications, and services. Nagios.org hosts downloads and documentation for the GPL-licensed core and related open source monitoring projects.
- Category
- Monitoring
- Free access
- Nagios.org promotes Nagios Core as free open source IT monitoring with public downloads.
- API access
- Not confirmed
Is Nagios right for you?
A good fit for
Teams self-hosting infrastructure monitoring who want the open source Nagios Core stack.
Before you choose
Commercial Nagios XI and other enterprise offerings are marketed separately from the open source Core project pages.
Open monitoring stack
Nagios.org centralizes the free Nagios Core monitor and companion open source projects for self-hosted infrastructure observability.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Open source core | Homepage meta description highlights free open source monitoring with Nagios Core under GPL licensing. | Facts sourced | 2026-10-04 |
| Coverage | Site lists monitoring for servers, networks, applications, and cloud platforms. | Facts sourced | 2026-10-04 |
| Related projects | Navigation links to Nagios Plugins, Mod-Gearman, and cross-platform agent resources. | Facts sourced | 2026-10-04 |
Understand the total cost
Nagios pricing & plans
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Explore toolThe practical questions
Frequently asked questions
What is Nagios used for?
Nagios Core is a free open source monitoring platform for servers, networks, applications, and services. Nagios.org hosts downloads and documentation for the GPL-licensed core and related open source monitoring projects.
Does Nagios have a free plan?
Nagios.org promotes Nagios Core as free open source IT monitoring with public downloads.. This record lists ongoing free access; check the plan limits before starting.
How much does Nagios cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use Nagios through an API?
Not confirmed. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Commercial Nagios XI and other enterprise offerings are marketed separately from the open source Core project pages.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.