# OpenNMS Reviews 2026. Verified Reviews, Pros & Cons | Capterra

> Is OpenNMS the right Network Monitoring solution for you? Explore 9 verified user reviews from people in industries like yours to make a confident choice.

Source: https://www.capterra.com/p/176635/OpenNMS/reviews

---

OpenNMS

4.9 (9)

[View alternatives](https://www.capterra.com/p/176635/OpenNMS/alternatives/)

Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Learn more](https://www.capterra.com/our-story/)

* * *

Last updated March 13th, 2026

# Reviews of OpenNMS

Ease of use

3.9

Customer Service

4.4

## Showing most helpful reviews

Showing 1-9 of 9 Reviews

Sort by:

Most Helpful

Rating

Company Size

Reviewer's Role

Length of Use

Frequency of Use

AL

Alan L.  
  
  
Used the software for: 1-2 years

### "Fast, Reliable, and Free Monitoring"

February 27, 2016

5.0

OpenNMS has had its ups and downs between versions, but has always been reliable and free monitoring. There are a lot of features that can be enabled with OpenNMS through the browser, but some will require having to open a text editor and manually creating or editing a text file. While there is a learning curve to this monitoring system if you've had experience with other monitoring systems, there is a very large support group that is always helpful.

Pros

Easy to use after configuration. Feature-rich. Supports escalations and different contact groups.

Cons

Not the easiest to configure for multiple groups supported.

Review Source

PM

Pablo M.  
Lead Sr. Network Architect  
Higher Education  
Used the software for: 2+ years

### "OpenNMS is overall a great product"

November 2, 2023

5.0

I have been using OpenNMS for years now. The fact that it is Open Source and has a wide community support is a big plus for me. We use OpenNMS daily as a powerful tool to proactively monitor our network. It has the flexibility and it is customizable to fit our needs. I highly recommend this product for network engineers who want to closely monitor their equipment, regardless of the network vendor they use.

Pros

OpenNMS has substantial support for traps and notifications based on those traps. We use it with great success on our network to get instant notifications on hardware failures, critical links down, etc. OpenNMS excels in providing a comprehensive collection of network graphs (including CPU, temperature, VPN active sessions, and much more) that we can display in beautiful panels using Grafana. We also use the API extensively to add/remove devices from OpenNMS without having to manually perform the task and keeping all monitored devices in sync with all our other network tools.

Cons

I have to admin that OpenNMS has a learning curve, and it should have more configuration parameters available on the web interface.

Reason for choosing OpenNMS

OpenNMS is hand down much better than other products for monitoring and alerting on multi-vendor network environment.

Review Source

VR

Verified Reviewer  
Network Analyst  
Hospital & Health Care  
Used the software for: 2+ years

### "OpenNMS Review"

December 4, 2023

4.0

Pros

OpenNMS is very powerful and customizable.

Cons

A lot of the configurations are difficult and need to be done by editing XML files.

Review Source

DS

David S.  
Research and Development Manager  
Information Technology and Services  
Used the software for: 2+ years

### "Great monitoring platform for any size network"

November 1, 2023

5.0

Used as the core software to provide network, server, and application monitoring as an MSP.

Pros

The out of the box experience covers many scenarios and all the right integration and customization layers are well thought out.

Cons

It would be nice if it scaled horizontally a bit better especially in the areas of polling and gathering of performance monitoring data. Multi-tenancy is not strong.

Review Source

UM

Udo M.  
IT Adminstration  
Health, Wellness and Fitness  
Used the software for: 2+ years

### "Reliable with good performance"

November 30, 2023

5.0

Pros

I like event-translator and provisioning because i can fit opennms to our needs in communcation to our other tools

Cons

Difficult file-based configuration of some features Upgrade to new versions needs configuration by hand of files

Review Source

BB

Brett B.  
SR. engineer  
Telecommunications  
Used the software for: 2+ years

### "review of OpenNMS for use for performance monitoring"

November 7, 2023

5.0

Great system once over the learning curve

Pros

vendor agnostic snmp gathering system. works good for that

Cons

initial configuration.

Reason for choosing OpenNMS

have used it in the past and am familiar

Review Source

AK

Achut K.  
Admin  
Health, Wellness and Fitness  
Used the software for: 2+ years

### "Systems monitor"

January 3, 2024

5.0

Pros

Easy setup and monitoring all key area networks

Cons

Good for monitoring for server management.

Review Source

RN

Rostand N.  
IT Fields Specialist  
Information Technology and Services  
Used the software for: 2+ years

### "OpenNMS efficiency"

November 4, 2023

5.0

Pros

I really like the way opennms is evolving, the possibility of customizing it and interfacing it with other solutions.

Cons

It's not easy for me to get the hang of, and it takes a lot of time and patience.

Review Source

RM

Robert M.  
Independent Entrepreneur  
Computer Software  
Used the software for:

### "null"

September 27, 2017

5.0

Review Source

Similar Products

Featured