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The OpenNMS Group, Inc. vs LibreNMS

The OpenNMS Group, Inc. and LibreNMS both land on Depends.

LibreNMS

librenms.org

Depends
Confidence: Medium

Buy if you're a network-savvy team or MSP wanting free SNMP device monitoring and can self-host and patch fast.

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The OpenNMS Group, Inc. versus LibreNMS
CompareThe OpenNMS Group, Inc.LibreNMS
VerdictDependsDepends
Best forLarge distributed networksMSPs monitoring many customer networks
Who it's not forSmall businesses with a handful of devicesTeams wanting hosted, turnkey monitoring with vendor support
PrivacyActively maintained: Meridian undergoes penetration testing, but a past code-execution vulnerability required immediate upgrade.⁸Actively maintained open-source project, but with a steady CVE stream . including RCE . so fast patching is mandatory.15
Support qualityHorizon is community-only; paid support via MeridianCommunity forums only; no vendor, no SLA.
Public sentimentNo substantive user review scores surfaced; Reddit and directory coverage centers on release announcements rather than buyer opinions.10Network admins praise LibreNMS's free autodiscovery and value, but report Windows/cloud gaps, efficiency complaints, and frequent patching demands.11
Biggest gotchaA past vulnerability allowed local and remote code execution and demanded immediate upgrades⁸SonarSource demonstrated code execution via SNMP traps; run current releases only.15

Pick The OpenNMS Group, Inc. when

  • Large distributed networks
  • Enterprises with dedicated network ops teams
  • Fortune 100-scale infrastructure
  • Teams avoiding vendor lock-in

When The OpenNMS Group, Inc. is not a fit

  • Small businesses with a handful of devices
  • Teams without dedicated network admins
  • Anyone wanting plug-and-play hosted monitoring
  • Non-technical users needing fast dashboards

Pick LibreNMS when

  • MSPs monitoring many customer networks
  • Network engineers wanting SNMP device polling
  • Budget-constrained teams comfortable self-hosting
  • Homelab and lab environments

When LibreNMS is not a fit

  • Teams wanting hosted, turnkey monitoring with vendor support
  • Windows/cloud-first shops needing app-level monitoring
  • Orgs that can't patch frequently . steady CVE stream
  • Small teams needing only simple up/down checks

Sources

  1. NantHealth Acquires OpenNMStechnologynetworks.com
    news
  2. OpenNMS Group company profilesystem.privco.com
    official
  3. OpenNMS: Monitoring Your Network's Heartbeatnanthealth.com
    official
  4. The OpenNMS Group Releases OpenNMS Meridian 2022nanthealth.com
    security
  5. OpenNMS Minion Appliance announcementbusinesswire.com
    news
  6. OpenNMS open-source overviewmedevel.com
    review
  7. AlternativeTo listingalternativeto.net
    review
  8. OpenNMS security issue requires immediate upgradeopennms.com
    security
  9. OpenNMS community support FAQopennms.com
    official
  10. Reddit opennms.com domain activityreddit.com
    review
  11. Opinions on LibreNMS? . r/networkingreddit.com
    review
  12. LibreNMS Review for MSPs . OpenMSPopenmsp.ai
    review
  13. LibreNMS Reviews . G2g2.com
    review
  14. Netdata vs LibreNMSnetdata.cloud
    review
  15. It's a (SNMP) Trap . SonarSourcesonarsource.com
    security
  16. CVE-2026-26990 . SQL Injectionsentinelone.com
    security