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Head-to-head · Infrastructure Monitoring

Checkmk vs Nagios XI

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Checkmk #2 in Infrastructure Monitoring 9.3/10 Free plan · paid from €190/mo (annual) · 30-day trial Free plan✓ 3 of 3 features Visit Checkmk
Nagios XI #17 in Infrastructure Monitoring 7.8/10 Free plan · paid from $2,595 · 30-day trial Free plan✓ 3 of 3 features Visit Nagios XI

Checkmk leads on 0 checks, Nagios XI on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreCheckmk · 9.3/10
  • Free planboth

Checkmk scores higher on our rubric for infrastructure monitoring: 9.3 against 7.8 out of 10; our editors rank them #2 and #17.

On deployment model, Checkmk gives you Hybrid where Nagios XI offers Self-hosted. On os coverage, Checkmk gives you Multiple where Nagios XI offers Linux and windows.

Checkmk is the better fit for hybrid monitoring with discovery and automation. Nagios XI is the better fit for self-hosted monitoring with classic operations workflows.

  • Checkmk fits best

    Hybrid monitoring with discovery and automation

  • Nagios XI fits best

    Self-hosted monitoring with classic operations workflows

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature Checkmk 9.3/10 Visit ↗ Nagios XI 7.8/10 Visit ↗
At a glance
Editor score 9.3 7.8
Ranking #2 in Infrastructure Monitoring #17 in Infrastructure Monitoring
Best for Hybrid monitoring with discovery and automation Self-hosted monitoring with classic operations workflows
Pricing model Free plan + paid Free plan + paid
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Free trial length 30 days 30 days · no card needed
Deployment Cloud, Self-hosted Self-hosted, Cloud
Platforms Web, Linux, Windows Linux, Web
Support Community, Tickets, Docs Tickets, Docs
Compliance ISO 27001, SOC 2, SSO/SAML, 2FA 2FA, SSO/SAML
Integrations 2,000+ integrations 7 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Checkmk 3/3 · Nagios XI 3/3
VM monitoring ✓ ✓
Service monitoring ✓ ✓
Agentless monitoring ✓ ✓
Specs
Included hosts Not published 100 hosts
Metrics retention Custom Not published
Deployment model Hybrid Self-hosted
OS coverage Multiple Linux and windows
Our review
Pros
  • Automatic discovery across servers, networks, cloud, and Kubernetes
  • Agent and agentless collection, including SNMP, WMI, IPMI, and Redfish
  • Free Community edition with 2000+ pre-built integrations
  • Monitors hosts, services, networks, clouds, VMs, and containers
  • Includes dashboards, maps, alerting, reports, and configuration wizards
  • Supports distributed monitoring, SNMP traps, REST API, and agentless checks
Cons
  • Paid self-hosted plans start at €190 per month with annual billing
  • Community edition scales to approximately 100 hosts
  • Advanced features and professional support require paid tiers
  • Free edition is limited to seven nodes or 100 services
  • Free plan does not include support
  • Paid licensing starts at a $2,595 one-time price
Our verdict

Checkmk is an infrastructure monitoring and observability platform for IT teams managing on-premises, cloud, hybrid, and containerized environments. It discovers hosts and services, collects status and performance data, and provides…

Read the review →

Nagios XI is a self-hosted infrastructure monitoring platform for IT teams responsible for servers, networks, applications, databases, cloud resources, virtual machines, and containers. It combines host and service checks with alerts,…

Read the review →
  1. CheckmkInfrastructure Monitoring 9.3Free plan · paid from €190/mo (annual) · 30-day trial
  2. Nagios XIInfrastructure Monitoring 7.8Free plan · paid from $2,595 · 30-day trial

Strengths and trade-offs

  • Checkmk — where it wins

    • Automatic discovery across servers, networks, cloud, and Kubernetes
    • Agent and agentless collection, including SNMP, WMI, IPMI, and Redfish
    • Free Community edition with 2000+ pre-built integrations

    Where it doesn't

    • Paid self-hosted plans start at €190 per month with annual billing
    • Community edition scales to approximately 100 hosts
    • Advanced features and professional support require paid tiers

  • Nagios XI — where it wins

    • Monitors hosts, services, networks, clouds, VMs, and containers
    • Includes dashboards, maps, alerting, reports, and configuration wizards
    • Supports distributed monitoring, SNMP traps, REST API, and agentless checks

    Where it doesn't

    • Free edition is limited to seven nodes or 100 services
    • Free plan does not include support
    • Paid licensing starts at a $2,595 one-time price
  • Checkmk9.3/10 · Free plan · paid from €190/mo (annual) · 30-day trial

    A broad hybrid-monitoring platform with free open-source coverage and paid automation tiers.

    Visit CheckmkFull verdict →
  • Nagios XI7.8/10 · Free plan · paid from $2,595 · 30-day trial

    A broad self-hosted monitoring suite for teams that prefer classic operations workflows.

    Visit Nagios XIFull verdict →

More comparisons

All infrastructure monitoring comparisons → · Full ranking →

Guides on infrastructure monitoring

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update