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OpenNMS vs Cacti® - The Complete RRDTool-based Graphing Solution

OpenNMS and Cacti® - The Complete RRDTool-based Graphing Solution both land on Depends.

OpenNMS

opennms.org

Depends
Confidence: Medium

Buy it if you run a large, complex network with dedicated admins and budget for an enterprise support subscription.

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OpenNMS versus Cacti® - The Complete RRDTool-based Graphing Solution
CompareOpenNMSCacti® - The Complete RRDTool-based Graphing Solution
VerdictDependsDepends
Best forLarge enterprise networksNetwork engineers graphing bandwidth and device health
Who it's not forSmall teams monitoring a handful of devices . massive overkillNon-technical teams wanting plug-and-play monitoring
PrivacyActively disclosed security process, but several public CVEs require prompt self-patching.⁶Free software with real, exploited CVEs; no vendor, so patching is entirely on you.15
Support qualityNo support evidence in sourcesCommunity forums only, no vendor
Public sentimentRatings are polarized: 4.9/5 on Capterra's small sample versus 3.5/5 in TechRadar's hands-on review, with Reddit discussions questioning its ease of adoption.³Admins value it as a solid free graphing tool, but forum evidence shows recurring install and configuration pain.
Biggest gotchaMeridian subscription pricing is not public; Software Advice lists ~$44,100²CVE-2024-25641, exploited in public hacking walkthroughs; patch fast or get popped.15

Pick OpenNMS when

  • Large enterprise networks
  • Teams with dedicated network admins
  • Open-source shops avoiding license fees
  • Distributed multi-site infrastructure

When OpenNMS is not a fit

  • Small teams monitoring a handful of devices . massive overkill
  • Buyers wanting a quick, turnkey cloud setup
  • Organizations without Linux/Java administration skills
  • Anyone unwilling to manage patches and upgrades themselves

Pick Cacti® - The Complete RRDTool-based Graphing Solution when

  • Network engineers graphing bandwidth and device health
  • Self-hosters comfortable with Linux, PHP, MySQL
  • Cost-sensitive infrastructure teams
  • Large device fleets needing a fast poller

When Cacti® - The Complete RRDTool-based Graphing Solution is not a fit

  • Non-technical teams wanting plug-and-play monitoring
  • Anyone needing vendor support or an SLA
  • Security-sensitive orgs without patch discipline
  • Small shops that just need a few server dashboards

Sources

  1. Enterprise Network Monitoring Platform | OpenNMS Meridianopennms.com
    official
  2. OpenNMS Software Reviews, Demo & Pricing . Software Advicesoftwareadvice.com
    review
  3. OpenNMS Software Pricing . Capterracapterra.com
    review
  4. I tested OpenNMS . TechRadartechradar.com
    review
  5. Does anybody use opennms? . Reddit r/sysadminreddit.com
    review
  6. CVE-2021-3396: OpenNMS Security Vulnerability (Please Update)opennms.com
    security
  7. CVE-2023-0872 Detail . NIST NVDnvd.nist.gov
    security
  8. The OpenNMS Group Releases OpenNMS Meridian 2022businesswire.com
    news
  9. OpenNMS Group Releases Minion Appliancenanthehealth.com
    news
  10. OpenNMS . Wikipediaen.wikipedia.org
    official
  11. Cacti security pagecacti.net
    official
  12. Cacti plugin reference docsdocs.cacti.net
    official
  13. Cacti GitHub repositorygithub.com
    official
  14. Hack The Box walkthrough - MonitorsTwoerichogue.ca
    security
  15. Hackthebox: MonitorsThreefouedsaidi.com
    security
  16. Installing and configuring Cacti on FreeBSDdnaeon.github.io
    review