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Cacti vs OpenNMS
People
Price
Free
Published entry price
$500+per month
Network Monitoring
Annual estimate10 people, entry price
Free
$6,000+
Flat rate
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Network Monitoring
Overview
Focus
Network Monitoring
Network Monitoring
Product
Open source network monitoring and graphing tool using RRDTool for data storage and graphing.
OpenNMS is an open-source enterprise-grade network monitoring platform designed for large-scale, distributed network environments with fault and performance management.
Headquarters
Remote
Apex, North Carolina
Company size
2-10 employees
51-200 employees
Founded
2001
2002
Pricing details
Plan
Published entry price
Published rate
Free
$500+ / month
Billable seats
Flat rate
Free options
Free plan
Free plan
Pricing source
Source updated
Nov 2, 2026
Oct 29, 2026