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NetCrunch vs OpenNMS

Both stand on network monitoring. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

NetCrunch

Free trial APISelf-hostedWeb+1

NetCrunch provides broad agentless monitoring, flow analysis, topology views, integrations, and enterprise automation options. Its Windows Server deployment and quote-based paid plans make it best suited to organizations evaluating infrastructure scale and edition requirements.

Visit NetCrunch

OpenNMS

Free plan APILinuxSelf-hosted+1

OpenNMS covers network monitoring across local and remote environments, with Horizon and Meridian serving different release and subscription needs. Consider Horizon’s production-readiness caveat and Meridian’s per-instance subscription limits when selecting a distribution.

Visit OpenNMS

The facts

NetCrunchOpenNMS
Free planA free trialYes
Open sourceNot publishedNot published
Runs onAPI, Self-hosted, Web, WindowsAPI, Linux, Self-hosted, Web
Lowest paid planFree or on requestBasic: $6,000 a year
Plans published46
MakerNot publishedNot published
Websiteadremsoft.comopennms.com
On network monitoring#38 of 55#19 of 55

NetCrunch: what it does well

  • More than 680 built-in monitoring targets
  • Automatic topology maps and live dashboards
  • Supports major flow-monitoring protocols
  • Offers Microsoft Teams, Slack, and PagerDuty integrations
  • Enterprise includes REST API and MCP server

What to know first

  • Runs on 64-bit Windows Server
  • No free plan is offered
  • Pricing requires a tailored request
  • Trial evaluation caps monitoring at 10,000 nodes or interfaces

OpenNMS: what it does well

  • Horizon community distribution is free
  • Monitors remote devices through Minions
  • Supports multiple traffic-flow formats
  • Grafana plugin displays alarms, outages, and KPIs

What to know first

  • Horizon features may not be production-ready
  • 24/7 emergency support costs extra
  • Support plans exclude several third-party products
  • Meridian subscriptions are limited per instance

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