Nagios XI is an enterprise-grade infrastructure monitoring platform from Nagios Enterprises, monitoring servers, networks, cloud and hybrid environments via SNMP. Priced per node starting at $2,595 per year (checked September 2026) for a 100-node Standard licence, with a free tier for up to 7 nodes.
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Nagios XI is an enterprise infrastructure monitoring solution from Nagios Enterprises for monitoring physical, virtual and cloud servers, network devices, and applications across hybrid environments. The platform excels at automatic network discovery with SNMP monitoring of routers, switches and network devices, complemented by configuration snapshots for tracking infrastructure changes over time and bandwidth monitoring with intelligent threshold alerting. It includes 70+ configuration wizards for quick setup without manual file editing, custom dashboards with graphs, status displays and network maps, and event handlers for automatic remediation scripting when problems occur. Distributed scaling is available through Mod-Gearman, allowing large deployments to distribute active checks across multiple Linux workers. The web-based console runs on Linux servers (RHEL, CentOS, Ubuntu, Debian) with monitoring data kept on-premises, addressing MSPs and enterprises that require control over their monitoring infrastructure and organisations with strict data residency compliance requirements.
Nagios XI pricing is published per node on an annual basis, starting at $2,595 per year (checked September 2026) for a 100-node Standard licence, with tiers scaling to $14,995 for 1,000 nodes. An Enterprise edition add-on provides SLA reporting, business process intelligence, capacity planning and audit logging, starting at $4,690 annually (checked September 2026). The company also offers a free tier limited to 7 nodes or 100 services for smaller deployments or evaluation, and a Sitewide option for organisations running multiple unlimited-node instances. Nagios integrates with complementary products in the Nagios suite, including Log Server for centralised log management, Network Analyzer for NetFlow analysis and bandwidth trending, plus open API access for custom integrations with existing infrastructure tools. MSPs should confirm which Nagios XI tier (Standard or Enterprise) includes the specific monitoring features they need, and verify on-premises Linux server requirements and capacity planning for their deployment.
Nagios XI suits enterprises and larger MSPs who control their own monitoring infrastructure and want a node-based licensing model with predictable costs, rather than metrics-based pricing. It stands out for auto-discovery, SNMP monitoring and customisable dashboards, making it useful for diverse infrastructure estates. However, wireless monitoring, topology mapping and multi-site dashboards were not documented as core features in published materials. The free 7-node tier is useful for evaluation. Compare against Zabbix (open source), PRTG (also SNMP-based, different pricing) and Auvik (cloud-first approach) to confirm fit for your network size and deployment model.
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PRTG Network Monitor Sensor-based network monitoring with a free tier and subscriptions from 200 dollars per month. No reviews yet · from US$200.00 All alternatives to Nagios XI| Feature | Supported | Note |
|---|---|---|
| Automatic network discovery | yes | Automatic network discovery maps infrastructure without manual configuration |
| Topology mapping | unknown | Network topology display not mentioned in published documentation |
| Device configuration backup | yes | Configuration snapshots allow comparison and rollback of changes |
| Uptime and outage alerting | yes | Intelligent alerting and escalation policies with event handlers |
| Bandwidth monitoring | yes | Bandwidth monitoring with threshold alerts and performance trending |
| SNMP support | yes | Monitor routers, switches and network devices using SNMP protocols |
| Wireless and access point monitoring | unknown | Wireless and access point monitoring not explicitly documented |
| Configuration change detection | yes | Configuration snapshots enable change tracking and rollback |
| Multi-site dashboard | unknown | Multi-site dashboard not documented as a core feature |
| Documentation integration | unknown | Documentation tool integration not mentioned in available materials |
| Remote access to devices | unknown | Remote access capabilities not documented in published features |
| Hardware probe option | unknown | Hardware probe option not mentioned in product documentation |
Nagios XI offers a genuinely free tier limited to 7 nodes or 100 services, whichever limit is reached first. This free edition includes most Standard features but does not include support or premium features. There is no separate time-limited trial; the free tier is permanent for qualifying deployments. Organisations needing more than 7 nodes must purchase a Standard or Enterprise licence.
Nagios XI is priced per node (unique IP address or monitored URL) on an annual basis. Standard edition starts at $2,595 per year for a 100-node licence, scaling to $14,995 for 1,000 nodes. Enterprise edition adds SLA reporting, business process intelligence and capacity planning, priced from $4,690 (100-node) to $17,090 (1,000 nodes). All paid licences include a Customer Success Manager for the first year. Sitewide licences for multiple unlimited-node instances require contacting sales.
Nagios XI supports SNMP monitoring for network devices including routers, switches and infrastructure hardware, with automatic network discovery. It monitors servers (physical, virtual and cloud), Linux and Windows systems, applications, databases and containers. The platform is highly extensible - any executable that returns an exit code works as a monitoring check, allowing custom checks for proprietary systems and services.
Nagios XI runs entirely on-premises on customer-controlled Linux servers (RHEL, CentOS, Ubuntu, Debian). It does not require cloud hosting and is designed so your monitoring data never leaves your infrastructure, which suits air-gapped environments and organisations with strict data residency requirements. This also means licensing is based on nodes rather than metrics volume or data consumption.
Nagios XI differs from cloud-first platforms like Auvik in being entirely on-premises with predictable per-node pricing rather than per-device cloud pricing. Compared with PRTG (also SNMP-based and on-premises), Nagios XI emphasises extensibility through scripting and open APIs, with 70+ built-in configuration wizards for quick setup. Unlike open-source Zabbix, Nagios XI includes commercial support and pre-built integrations, though Zabbix is free. MSPs should evaluate whether they prefer node-based annual licensing versus per-user or per-metric pricing models.
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