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Nagios XI vs PRTG Network Monitor comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Sep 21, 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
6.6
Nagios XI enhances efficiency and time management but concerns about increased costs affect ROI perception across organizations.
Sentiment score
6.9
PRTG Network Monitor boosts ROI by reducing downtime, saving costs, and enabling proactive problem-solving for efficient IT operations.
It provides accurate data for utilization, allowing us to monitor and optimize our investments in WAN connection capacity.
After introducing PRTG Network Monitor, we have saved time, and it's easy for everybody to monitor everything.
I have seen a return on investment with PRTG Network Monitor as it has saved a lot of time, and its monitoring has reduced manpower requirements, which has been helpful.
 

Customer Service

Sentiment score
6.5
Nagios XI support is mixed; praised for responsiveness but criticized for high cost, complex licensing, and delayed responses.
Sentiment score
6.6
PRTG Network Monitor's support is responsive via email but inconsistent, with users often relying on online resources for help.
They resolve our queries 24/7.
The setup process is well-documented, making it easy to deploy.
Tutorials are available so I can manage any issue with PRTG Network Monitor easily.
 

Scalability Issues

Sentiment score
7.1
Nagios XI is scalable for small to medium environments but faces challenges in large infrastructures and cloud adaptability.
Sentiment score
7.4
PRTG Network Monitor is scalable, adaptable to various demands, with flexible expansion through sensors, licenses, and remote probes.
If the user interface isn’t presenting data well, it becomes difficult to manage when scaling.
On a scale of one to ten, scalability is rated as 9.5.
PRTG Network Monitor has the ability to scale and add new devices.
You can install them in each network, even if they are not connected, and it works.
 

Stability Issues

Sentiment score
7.3
Nagios XI is stable, but large deployments may experience performance issues, database problems, and minor network dependencies.
Sentiment score
7.9
PRTG Network Monitor is stable and reliable, with issues often related to user configuration and resource allocation.
It is very stable.
We haven't needed vendor support for the last three years, which demonstrates the product's stability.
PRTG Network Monitor is stable in my experience, and I have not encountered issues with crashes or downtime.
 

Room For Improvement

Nagios XI's interface is outdated, lacks scalability, needs better cloud integration, APIs, automation, and improved documentation.
Users seek improved template management, map flexibility, application monitoring, faster interface, dashboard, licensing, customization, mobile features, support, and integration.
Many tools have poor user interfaces, making them hard to manage and navigate.
The GUI could be improved. It's a bit too basic.
They need to improve application performance monitoring, error tracing mechanisms, and log management.
PRTG Network Monitor should provide syslog monitoring since it is not available at this time.
PRTG Network Monitor can sometimes be too detailed and cluttered at the beginning, making it heavy to use.
 

Setup Cost

Nagios XI provides cost-efficient enterprise-level monitoring with reasonable pricing, appreciated for its features and open-source options.
PRTG Network Monitor provides flexible pricing by sensor count, cost-effective for enterprises but possibly costly in complex setups.
We are using the free, open-source version.
The pricing for the Nagios XI product is good and better than other solutions.
The licensing part is a recurring license for every year, which is very affordable, making PRTG Network Monitor budget-friendly.
Pricing is by the number of devices, not by sensor.
The prices are very high for PRTG Network Monitor.
 

Valuable Features

Nagios XI provides customizable, flexible, and scalable IT infrastructure monitoring with real-time alerts and extensive plugin support.
PRTG Network Monitor is user-friendly, versatile, cost-effective, supports multiple vendors, and is preferred for its scalability and adaptability.
Nagios XI simplifies our setup and reduces the time spent configuring monitoring tools.
The alerting system is very effective.
PRTG Network Monitor already provided me with 100 free sensors, which is enough for my network monitoring.
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.
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.
 

Categories and Ranking

Nagios XI
Ranking in Network Monitoring Software
25th
Ranking in IT Infrastructure Monitoring
28th
Ranking in Cloud Monitoring Software
25th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
58
Ranking in other categories
Server Monitoring (13th)
PRTG Network Monitor
Ranking in Network Monitoring Software
5th
Ranking in IT Infrastructure Monitoring
5th
Ranking in Cloud Monitoring Software
10th
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
109
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2025, in the Network Monitoring Software category, the mindshare of Nagios XI is 3.1%, down from 3.7% compared to the previous year. The mindshare of PRTG Network Monitor is 4.1%, down from 4.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Network Monitoring Software Market Share Distribution
ProductMarket Share (%)
PRTG Network Monitor4.1%
Nagios XI3.1%
Other92.8%
Network Monitoring Software
 

Q&A Highlights

it_user82725 - PeerSpot reviewer
Mar 16, 2016
 

Featured Reviews

Amir  Said - PeerSpot reviewer
Effective alerting enhances network monitoring experience with an easy setup
We love Nagios XI due to the fact that JPS Web is very useful. JPS monitors the modem and performs switching, monitoring the computer, and performing switching. We implement some applications and traffic monitoring. The alerting system is very effective. For instance, if we have an alarm on some RAM storage if the traffic is cut or dropped.
madhan kumar hs - PeerSpot reviewer
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.
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Comparison Review

it_user174738 - PeerSpot reviewer
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…
 

Answers from the Community

it_user82725 - PeerSpot reviewer
Mar 16, 2016
Mar 16, 2016
PRTG is quite basic for this type of application monitoring, it'll give you some general metrics but what you're asking for is better done with Nagios, though its architecture and the information it provides won't give you the best metrics either. In this case your safest bet would be Zabbix, although both Nagios and Zabbix will steal a lot of your time until you can tune them to the detail lev...
2 out of 4 answers
Nov 26, 2014
PRTG is a network monitoring tool that uses SNMP protocol. You can configure weblogic server to use SNMP protocol to communicate with PRTG using agents. The same thing for Oracle ESB, by enabling SNMP traps in the Oracle Servcie bus. I think your business requirement as well as budget, will determine which monitoring tool you can use. I think all network monitoring tools, using SNMP traps, can do the job. Any SW or applications can build an SNMP traps to communicate with the monitoring tool. You can consult Oracle's manuals for more details. I hope this will be helpful. All the best, Ashraf Galal
it_user155127 - PeerSpot reviewer
Nov 26, 2014
Hi, I've no experience with PRTG, but you can find that on their site: http://www.paessler.com/oracle_monitoring I used to practice some time ago Nagios, on Linux boxes with web Logic, and it adapted well to our needs. I'm no longer experimenting with supervision tools as i switched to backup and storage. Regards E.Boutang
 

Top Industries

By visitors reading reviews
Computer Software Company
13%
Financial Services Firm
11%
Manufacturing Company
8%
Government
8%
Computer Software Company
12%
Government
9%
Financial Services Firm
8%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business22
Midsize Enterprise17
Large Enterprise21
By reviewers
Company SizeCount
Small Business57
Midsize Enterprise18
Large Enterprise41
 

Questions from the Community

What is your experience regarding pricing and costs for Nagios XI?
The pricing for the Nagios XI product is good and better than other solutions. I would give it a four or five.
What needs improvement with Nagios XI?
The user interface needs improvement. Many tools have poor user interfaces, making them hard to manage and navigate.
What is your primary use case for Nagios XI?
I normally use Nagios XI for our servers. It's not particularly used for network equipment, however, I use it for monitoring our server performance, including CPU, memory, data, and services runnin...
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.
 

Comparisons

 

Overview

 

Sample Customers

Nagios has over one million users globally, including AOL, DHL, McAfee, MCI, MTV, Yahoo!, Universal, Toshiba, Sony, Siemens, and JPMorgan Chase.
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 XI vs. PRTG Network Monitor and other solutions. Updated: October 2025.
869,785 professionals have used our research since 2012.