Try our new research platform with insights from 80,000+ expert users

Nagios Core vs PRTG Network Monitor comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 28, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
8.8
Nagios Core reduces downtime and costs with quick alerts, providing full ROI and eliminating expensive monitoring tools.
Sentiment score
6.6
PRTG Network Monitor provides cost-effective returns by enhancing efficiency, reducing downtime, and minimizing staffing needs through proactive monitoring.
It provides accurate data for utilization, allowing us to monitor and optimize our investments in WAN connection capacity.
Network Manager at a financial services firm with 1,001-5,000 employees
After introducing PRTG Network Monitor, we have saved time, and it's easy for everybody to monitor everything.
Architect at a consultancy with 1-10 employees
The implementation reduced our employee resources from 20-25 to 5-6 employees.
Senior consultant at Cambridge Institute of Technology
 

Customer Service

Sentiment score
5.1
Nagios Core relies on community support, praised for stability and resources, but lacks official help compared to Nagios XI.
Sentiment score
6.7
PRTG Network Monitor support is generally effective, but time zone issues and complex queries can delay responses.
They resolve our queries 24/7.
software engineer at Capgemini
The setup process is well-documented, making it easy to deploy.
Solutions Architect at Boch Systems Company Limited
Tutorials are available so I can manage any issue with PRTG Network Monitor easily.
IT Infrastructure Engineer at Atlas
 

Scalability Issues

Sentiment score
6.7
Nagios Core shows scalability for large networks but may need customizations and integrations for distributed environments.
Sentiment score
7.4
PRTG Network Monitor is scalable and flexible for varying deployments but requires extra licenses and hardware for growth.
The solution is scalable.
Senior System Administrator at Interactive Group
On a scale of one to ten, scalability is rated as 9.5.
Solutions Architect at Boch Systems Company Limited
PRTG Network Monitor has the ability to scale and add new devices.
IT Infrastructure Engineer at Atlas
You can install them in each network, even if they are not connected, and it works.
IT Consultant at M-COM s.r.o
 

Stability Issues

Sentiment score
8.2
Nagios Core is highly stable and reliable with minimal footprint, supporting extensive monitoring without network burden.
Sentiment score
7.9
PRTG Network Monitor is highly stable with reliable performance, minimal downtime, and robust updates, despite minor external issues.
I tried many other solutions at work, however, in terms of Nagios, I haven't seen any disruption or downtime.
Senior System Administrator at Interactive Group
We haven't needed vendor support for the last three years, which demonstrates the product's stability.
Network Manager at a financial services firm with 1,001-5,000 employees
PRTG Network Monitor is stable in my experience, and I have not encountered issues with crashes or downtime.
Associates at Mphasis
PRTG Network Monitor is very stable and requires low maintenance.
Software Engineer at Asahi Beverages
 

Room For Improvement

Nagios Core needs a more intuitive interface, better scalability, and features like enhanced reporting and integration with modern tools.
PRTG Network Monitor needs improvements in customization, performance, support, integration, analytics, and cost-efficiency for enhanced usability and flexibility.
The initial auto-discovery added too many unnecessary sensors, so auto-discovery should only take the necessary sensors into consideration.
Senior consultant at Cambridge Institute of Technology
They need to improve application performance monitoring, error tracing mechanisms, and log management.
Solutions Architect at Boch Systems Company Limited
PRTG Network Monitor should provide syslog monitoring since it is not available at this time.
IT Infrastructure Engineer at Atlas
 

Setup Cost

Nagios Core is a free, cost-effective open-source tool, but requires Linux expertise and incurs hosting and maintenance costs.
PRTG Network Monitor is cost-effective for enterprises, but costs may rise; offers flexible licensing with annual support.
The licensing part is a recurring license for every year, which is very affordable, making PRTG Network Monitor budget-friendly.
software engineer at Capgemini
Pricing is by the number of devices, not by sensor.
Solutions Architect at Boch Systems Company Limited
The prices are very high for PRTG Network Monitor.
IT Infrastructure Engineer at Atlas
 

Valuable Features

Nagios Core provides flexible, low-resource monitoring with customization, automation, efficient alerts, and integration support for reliable IT performance visibility.
PRTG Network Monitor is valued for its rapid deployment, intuitive interface, scalability, reliability, and comprehensive monitoring features.
You can monitor anything.
Senior System Administrator at Interactive Group
PRTG Network Monitor already provided me with 100 free sensors, which is enough for my network monitoring.
IT Infrastructure Engineer at Atlas
PRTG Network Monitor has a good dashboard that shows each and every piece of information, so we can easily find out what is happening with the systems.
Architect at a consultancy with 1-10 employees
These reports help me in my day-to-day work, and I rely on them because they provide proof during escalation, with exact downtime logs and related information.
Software engineer at Bosch
 

Categories and Ranking

Nagios Core
Ranking in Network Monitoring Software
10th
Ranking in IT Infrastructure Monitoring
11th
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
51
Ranking in other categories
No ranking in other categories
PRTG Network Monitor
Ranking in Network Monitoring Software
5th
Ranking in IT Infrastructure Monitoring
4th
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
112
Ranking in other categories
Cloud Monitoring Software (9th)
 

Mindshare comparison

As of January 2026, in the Network Monitoring Software category, the mindshare of Nagios Core is 1.9%, down from 3.0% compared to the previous year. The mindshare of PRTG Network Monitor is 3.3%, down from 4.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Market Share Distribution
ProductMarket Share (%)
PRTG Network Monitor3.3%
Nagios Core1.9%
Other94.8%
Network Monitoring Software
 

Featured Reviews

HY
Senior System Administrator at Interactive Group
Monitoring solution provides comprehensive visibility across IT infrastructure
The good thing about Nagios Core is it covers everything. Everything in the IT domain, you can monitor anything. You can even monitor printers, the ports of printers, Core workstations, and storage. You can monitor the workflow Core and the utilization of computes. If you want to grasp everything of your IT equipment on a single interface, you can use Nagios. It's the best one. It provides dashboards, and you can also configure your emails and alerts with it. If something is critical, you can configure it to notify via emails. It has a very handy dashboard, providing live alerts and visibility for everything.
madhan kumar hs - PeerSpot reviewer
software engineer at Capgemini
Alerting precision has reduced incident response times and improved department-level network visibility
The auto-pause sensor during the maintenance window is good without any false alerts, and it prevents me from getting flooded with alerts during planned maintenance, helping department heads understand their own network usage better. It has reduced incident response time by giving clearer ownership of each alert, ensuring alerts go to the proper recipient. SNMP testers and auto-pause are among the best features of PRTG Network Monitor, which is particularly useful for different departments such as HR and finance, where alerts can be filtered accordingly. The alerting features and dashboard of PRTG Network Monitor are very helpful, especially in our industry. However, the dashboard can look cluttered on smaller screens, which is one negative aspect. PRTG Network Monitor has impacted us positively; we have stopped getting flooded with alerts during planned maintenance or unplanned outages. Compared to others, this gives specific alerts very quickly and helps department heads understand their own network usage better, thus reducing incident response time so that each alert has clear ownership.
report
Use our free recommendation engine to learn which Network Monitoring Software solutions are best for your needs.
879,455 professionals have used our research since 2012.
 

Comparison Review

it_user174738 - PeerSpot reviewer
IT Developer at a tech services company with 51-200 employees
May 31, 2015
Nagios vs. Zabbix vs. PRTG vs. Spiceworks vs. Solarwinds Network Performance Monitor
I have researched a quite a few network monitoring tools which can be used for various monitoring purposes of not only the servers, but the intermediate routers as well. There are majorly three types of these softwares. Ones which are completely open-source, you can do almost anything you want…
 

Top Industries

By visitors reading reviews
Computer Software Company
12%
Manufacturing Company
10%
Comms Service Provider
9%
Government
8%
Computer Software Company
11%
Financial Services Firm
8%
Comms Service Provider
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise11
Large Enterprise22
By reviewers
Company SizeCount
Small Business59
Midsize Enterprise19
Large Enterprise47
 

Questions from the Community

What is your experience regarding pricing and costs for Nagios Core?
Nagios Core is a free and open-source product. We don't charge for the product itself, but we charge for the man-hour costs related to installation, configuration, ongoing operation, and maintenance.
What needs improvement with Nagios Core?
The dashboard should be improved. It's very simple. I don't have a very clear or specific suggestion. You can change the skin of the dashboard, however, it's good for me.
What is your primary use case for Nagios Core?
I was a senior system administrator. I've been using Nagios Core for more than ten years now. It can be used to monitor hosts, such as machines, and monitor services of any kind. I'm using it to mo...
What is the best network monitoring software for large enterprises?
PRTG network monitor is one of the best tool i have ever used for the monitoring. It have auto discovery option. it avoid the configuring the device in PRTG. It automatically discover the device an...
What do you like most about PRTG Network Monitor?
The tool is integrated with our email for the alerts.
What is your experience regarding pricing and costs for PRTG Network Monitor?
The pricing was higher at the beginning, but the recurring licensing cost is affordable and reasonable. Overall, the pricing, setup cost, and licensing is fair for our industry. They have quoted us...
 

Comparisons

 

Overview

 

Sample Customers

Airbnb, Cisco, PayPal, FanDuel
Jameson Bank, Sidnix, RungeICT, MedicalAnimal, Truck-lite, GamingGrids, The Covell Group, Forsythn County Schools, NetMass, Musgrove Park Hospital, Lanes Health, Columbia Southern University, Vodafone, Intrust Bank
Find out what your peers are saying about Nagios Core vs. PRTG Network Monitor and other solutions. Updated: December 2025.
879,455 professionals have used our research since 2012.