OpenNMS
Depends
Confidence: Medium
Buy it if you run a large, complex network with dedicated admins and budget for an enterprise support subscription.
Comparison
OpenNMS and Cacti® - The Complete RRDTool-based Graphing Solution both land on Depends.
Buy it if you run a large, complex network with dedicated admins and budget for an enterprise support subscription.
Use Cacti if you're a technical team wanting free, self-hosted network graphing and can run and patch the stack yourself.
| Compare | OpenNMS | Cacti® - The Complete RRDTool-based Graphing Solution |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | Large enterprise networks | Network engineers graphing bandwidth and device health |
| Who it's not for | Small teams monitoring a handful of devices . massive overkill | Non-technical teams wanting plug-and-play monitoring |
| Privacy | Actively disclosed security process, but several public CVEs require prompt self-patching.⁶ | Free software with real, exploited CVEs; no vendor, so patching is entirely on you.15 |
| Support quality | No support evidence in sources | Community forums only, no vendor |
| Public sentiment | Ratings 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.³ | Admins value it as a solid free graphing tool, but forum evidence shows recurring install and configuration pain. |
| Biggest gotcha | Meridian subscription pricing is not public; Software Advice lists ~$44,100² | CVE-2024-25641, exploited in public hacking walkthroughs; patch fast or get popped.15 |