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Nagios XI vs ServiceNow Discovery comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Aug 6, 2024

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
6.1
ServiceNow Discovery's ROI is inconsistent, with full benefits seen when combined with other services for operational efficiency.
 

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
6.0
ServiceNow Discovery's support varies, with mixed experiences on responsiveness and effectiveness, improving with advanced support tiers and partnerships.
The 'follow the sun' model, where the time of raising the ticket and where it lands, plays a crucial role.
Manager, Solution/Service Delivery at a tech services company with 51-200 employees
This rating is because there are features on the tool that never worked and despite calling our support, there were no results.
IT Service Performance Manager at MTN
 

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
ServiceNow Discovery is highly scalable, suited for large infrastructures, compatible with AWS and Azure, but requires careful cost management.
If the user interface isn’t presenting data well, it becomes difficult to manage when scaling.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
I would rate it as a nine on a scale of one to ten, indicating it is highly scalable.
Software Consultant at a tech vendor with 10,001+ employees
Small companies will not be able to afford ServiceNow Discovery from the pricing perspective.
Manager, Solution/Service Delivery at a tech services company with 51-200 employees
It receives this rating because it can be difficult to troubleshoot when the discovery is failing.
IT Service Performance Manager at MTN
 

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
8.0
ServiceNow Discovery is highly stable and reliable, with minor configuration issues not affecting its strong overall performance ratings.
It is very stable.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
I would rate the stability of ServiceNow Discovery as nine, as we never had downtime.
IT Service Performance Manager at MTN
That is not a mistake of the product. It is due to excessive security on the network.
Manager, Solution/Service Delivery at a tech services company with 51-200 employees
 

Room For Improvement

Nagios XI's interface is outdated, lacks scalability, needs better cloud integration, APIs, automation, and improved documentation.
ServiceNow Discovery struggles with service mapping and integration, necessitating enhancements for usability, cloud capabilities, and easier licensing.
Many tools have poor user interfaces, making them hard to manage and navigate.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
The GUI could be improved. It's a bit too basic.
Site Duty Manager at Assw
ServiceNow ITOM is particularly not very strong in terms of monitoring capabilities. They do not have any monitoring tool.
Manager, Solution/Service Delivery at a tech services company with 51-200 employees
A CMDB debugging tool to give indication about the errors that appear would be appreciated.
Director, Information Technology at Gen™
Improvements could include implementing chatbots to simplify ticket creation.
Software Consultant at a tech vendor with 10,001+ employees
 

Setup Cost

Nagios XI provides cost-efficient enterprise-level monitoring with reasonable pricing, appreciated for its features and open-source options.
ServiceNow Discovery is pricey but valued for advanced features, with potential discounts though standalone costs are high.
We are using the free, open-source version.
Site Duty Manager at Assw
The pricing for the Nagios XI product is good and better than other solutions.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
I think the price of ServiceNow Discovery is cheaper than BMC.
IT Service Performance Manager at MTN
ServiceNow is considered more expensive compared to other products.
Software Consultant at a tech vendor with 10,001+ employees
 

Valuable Features

Nagios XI provides customizable, flexible, and scalable IT infrastructure monitoring with real-time alerts and extensive plugin support.
ServiceNow Discovery integrates seamlessly with ServiceNow suite, enhancing IT operations through automated mapping, security, and cloud discovery.
Nagios XI simplifies our setup and reduces the time spent configuring monitoring tools.
Network and Security Engineer at a educational organization with 1,001-5,000 employees
The alerting system is very effective.
Site Duty Manager at Assw
Cost optimization and contract notifications are also useful as they provide insights into user time spent on tickets.
Software Consultant at a tech vendor with 10,001+ employees
ServiceNow Discovery has normal discovery of CIs, as well as horizontal discovery for understanding Service Mapping.
Manager, Solution/Service Delivery at a tech services company with 51-200 employees
ServiceNow Discovery helps with operations, audits, and allows people to assess how a particular change in infrastructure impacts other components.
Director, Information Technology at Gen™
 

Categories and Ranking

Nagios XI
Ranking in Server Monitoring
14th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
58
Ranking in other categories
Network Monitoring Software (26th), IT Infrastructure Monitoring (28th), Cloud Monitoring Software (26th)
ServiceNow Discovery
Ranking in Server Monitoring
5th
Average Rating
8.0
Reviews Sentiment
6.7
Number of Reviews
44
Ranking in other categories
IT Asset Management (6th), Cloud Resource Discovery Services (1st)
 

Mindshare comparison

As of January 2026, in the Server Monitoring category, the mindshare of Nagios XI is 5.7%, down from 6.6% compared to the previous year. The mindshare of ServiceNow Discovery is 3.3%, down from 5.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Server Monitoring Market Share Distribution
ProductMarket Share (%)
ServiceNow Discovery3.3%
Nagios XI5.7%
Other91.0%
Server Monitoring
 

Featured Reviews

Emmanuel Appiah Boateng - PeerSpot reviewer
Network and Security Engineer at a educational organization with 1,001-5,000 employees
Simplifies setup and requires user interface enhancement
Nagios XI is easy to install, which sets it apart from other open-source solutions I've tried. Typically, setting up a monitoring system on Linux involves cloning files from GitHub, building it, and installing many dependencies, but with Nagios XI, it wasn't like that. Nagios XI simplifies our setup and reduces the time spent configuring monitoring tools.
reviewer2759271 - PeerSpot reviewer
Manager, Solution/Service Delivery at a tech services company with 51-200 employees
Has supported enterprise needs well and addresses discovery across environments
Small companies will not be able to afford ServiceNow Discovery from the pricing perspective. Hence, they will not opt for ServiceNow Discovery as a solution, either as an ITSM solution or ITOM solution. It will not be affordable. I am specifically talking about the Middle East and Africa region. ServiceNow ITOM is particularly not very strong in terms of monitoring capabilities. They do not have any monitoring tool. They use event management from getting events from other tools. In that front, they had a roadmap for going for an open-source solution, but I have not seen that materialize. There is a lack of tools perspective for monitoring. Perhaps they do not have a plan because there are hundreds of tools available, and they prefer to focus on integration and event management.
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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
Financial Services Firm
11%
Computer Software Company
11%
Manufacturing Company
8%
Government
7%
Financial Services Firm
13%
Computer Software Company
9%
Manufacturing Company
9%
Healthcare Company
8%
 

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 Business16
Midsize Enterprise5
Large Enterprise23
 

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 do you like most about ServiceNow Discovery?
The solution can prioritize the discovery of IP ranges. The product automatically places all Discovery CIs into the correct class within the CMDB.
What is your experience regarding pricing and costs for ServiceNow Discovery?
The pricing information for ServiceNow Discovery was requested but not provided.
What needs improvement with ServiceNow Discovery?
A CMDB debugging tool to give indication about the errors that appear would be appreciated.
 

Overview

 

Sample Customers

Nagios has over one million users globally, including AOL, DHL, McAfee, MCI, MTV, Yahoo!, Universal, Toshiba, Sony, Siemens, and JPMorgan Chase.
York, National Grid, DXC Technology, experian, BEACHBODY
Find out what your peers are saying about Nagios XI vs. ServiceNow Discovery and other solutions. Updated: January 2026.
880,901 professionals have used our research since 2012.