Side by side
Nagios XI vs Robusta
Both stand on cloud monitoring. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+3
Nagios XI offers self-hosted monitoring, a limited free edition, and perpetual paid licenses priced by node count. Its 30-day trial includes Enterprise features and direct technical support; compare the edition features and deployment requirements before selecting a license.
Visit Nagios XI
Free plan APISelf-hostedWeb
Choose Robusta if your team needs AI assistance investigating alerts and wants control over deployment and model choice. The main consideration is that pricing requires a quote, and self-hosted deployment uses your own LLM key.
Visit RobustaThe facts
| Nagios XI | Robusta | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | No | Not published |
| Runs on | API, Linux, Mac, Self-hosted, Web, Windows | API, Self-hosted, Web |
| Lowest paid plan | Standard (100-Node): $2,595, paid once | Free or on request |
| Plans published | 8 | 1 |
| Maker | Not published | Not published |
| Website | nagios.com | home.robusta.dev |
| On cloud monitoring | #8 of 31 | #12 of 31 |
Nagios XI: what it does well
- Checks servers, network devices, applications, and services.
- Standard includes auto-discovery and dashboards.
- Enterprise includes SLA reports and capacity planning.
- Trial includes unlimited monitoring and technical support.
- Paid licenses allow unlimited services per licensed node.
What to know first
- Requires self-hosted Linux deployment.
- Free edition is limited to 7 Nodes or 100 Services, whichever comes first.
- 100-node Standard license costs 2595.00 USD once.
- Paid licenses include first-year support only.
Robusta: what it does well
- Groups duplicate alerts and filters noise.
- Investigates root cause and blast radius, then suggests a fix.
- Supports SaaS, customer VPC, and self-hosted deployment.
- Customers can choose models and API keys.
- Queries, log lines, and conclusions are logged and replayable.
What to know first
- Pricing requires a quote based on team and infrastructure details.
- Full self-hosting requires the customer's own LLM key.
- Auto-remediation write access is opt-in; the agent is read-only by default.
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