Nagios
Open source monitoring and alerting system for IT infrastructure
- Vendor
- Nagios Enterprises
- Also known as
- nagios
What is Nagios?
An open-source platform for monitoring servers, networks, applications, and cloud infrastructure using active polling, with log analysis and visualization capabilities.
Nagios pricing
We don't have Nagios's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Nagios does
The capabilities that matter for observability tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Metrics
- ✓
- Log management
- ✓
- Distributed tracing
- -
- Application performance monitoring
- ✓
- Real-user monitoring
- -
- Alerting
- ✓
- On-call / incident management
- ✓
- Dashboards
- ✓
- OpenTelemetry-native
- -
- Hosting
- Cloud + self-hosted
Platform & deployment
Independently observed- CLI
- macOS
- Web
- Linux
- Windows
- Self-hosted
Integrations (26)
Independently observed- Grafana
- InfluxDB
- Prometheus
- Apache
- Nginx
- IIS
- Tomcat
- MySQL
- PostgreSQL
- Oracle
- SQL Server
- MongoDB
- LDAP
- Active Directory
- JBoss
- WebLogic
- Citrix
- PagerDuty
- Slack
- ServiceNow
- DB2
- EC2
- VMware
- Hyper-V
- MSSQL
- IPMI
Nagios FAQ
Common questions about Nagios, answered from independent, dated evidence.
What is Nagios?
A free, open-source monitoring system that tracks the health and performance of IT infrastructure including servers, networks, and applications, providing real-time visibility and alerting to prevent downtime. It is indexed under Observability Tools.
Source: https://www.nagios.org
Is Nagios free to use?
Nagios is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.
Source: https://www.nagios.org
What platforms does Nagios support?
Nagios supports the web, Windows, macOS and Linux. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://www.nagios.org
Can Nagios be self-hosted?
Yes. Nagios can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://www.nagios.org
What does Nagios integrate with?
We have confirmed 26 integrations for Nagios, including Grafana, InfluxDB, Prometheus, Apache, Nginx, IIS, Tomcat and MySQL, plus 18 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://www.nagios.org
Nagios alternatives
Other observability tools we track, ranked by the same independent score.
- NetdataReal-time infrastructure monitoring with zero configuration and AI-driven analysismedium · 63%
- ChronosphereAI-powered observability platform that reduces noise and accelerates incident detection across cloud-native systemslow · 47%
- GroundcoverAn observability platform that collects logs, metrics, and traces from cloud environments while keeping data local and costs predictable.medium · 73%
- MiddlewareObservability platform for cloud infrastructure and application monitoringmedium · 74%
- Better Stackmedium · 72%
- SematextUnified monitoring and observability platform for APIs, logs, metrics, and real-user experiencelow · 49%
Compare Nagios
Side by side against other observability tools, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Nagios, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 100 | 0.05 | 5.1 | ✓ |
| Integrations | 100 | 0.05 | 4.9 | ✓ |
| Price level | 80 | 0.04 | 3.4 | ✓ |
| Pricing transparency | 25 | 0.06 | 1.6 | ✓ |
| Reliability | 0 | 0.16 | 0.0 | - |
| Security posture | 0 | 0.12 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 60% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Apm: Yes · Logs: Yes · Hosting: both · Metrics: Yes · On call: Yes · Alerting: Yes | mediumsource · 2026-10-06 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 4,000 | mediumsource · 2026-08-24 · 60% |
Pricing
Is Nagios the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Nagios against the rest of the observability tools we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
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