Nagios Core vs PRTG Enterprise Monitor comparison

Nagios and Paessler GmbH are both solutions in the Network Monitoring Software category. Nagios is ranked #10 with an average rating of 8.7, while Paessler GmbH is ranked #31 with an average rating of 7.9. Nagios holds a 1.9% mindshare in NMS, compared to Paessler GmbH’s 0.6% mindshare. Additionally, 80% of Nagios users are willing to recommend the solution, compared to 90% of Paessler GmbH users who would recommend it.

Nagios Core

Read 51 Nagios Core reviews

5,072 Views
4,210 Comparison Views

80% willing to recommend

PRTG Enterprise Monitor

Read 11 PRTG Enterprise Monitor reviews

1,096 Views
1,085 Comparison Views

90% willing to recommend

Nagios Core

PRTG Enterprise Monitor

Comparison Buyer's Guide

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Executive SummaryUpdated on Oct 10, 2024

Nagios Core and PRTG Enterprise Monitor are competing network monitoring solutions. PRTG Enterprise Monitor seems to have the upper hand due to its comprehensive suite of features, despite higher costs and complexity.

Features: Nagios Core offers flexible plugin architecture, enabling broad customization and integration with third-party tools. It provides a modular approach that allows organizations to tailor their monitoring needs but may require more technical input. PRTG Enterprise Monitor provides an all-in-one platform, including bandwidth monitoring, traffic analysis, and a variety of pre-configured sensors. It is designed to handle larger IT environments with an integrated feature set, offering robust monitoring capabilities out of the box.

Room for Improvement: Nagios Core could improve in ease of deployment and direct customer service, as it relies heavily on community support. Its interface might be enhanced for a more modern user experience. PRTG Enterprise Monitor could benefit from offering more flexible pricing models to accommodate smaller organizations. Reducing complexity in its feature set might appeal to users with less technical expertise. Improving the depth of customization options could help cater to specific advanced monitoring scenarios.

Ease of Deployment and Customer Service: PRTG Enterprise Monitor facilitates a user-friendly setup with guided configurations and strong customer service support, making it suitable for fast deployment scenarios. Conversely, Nagios Core requires a higher level of technical expertise for installation and configuration, as it lacks formal direct customer support services. However, its open-source nature offers extensive community-driven assistance, which may be attractive to technical teams.

Pricing and ROI: Nagios Core’s open-source model reduces setup costs, potentially offering higher ROI for organizations able to leverage its community-driven ecosystem. PRTG Enterprise Monitor, with its all-inclusive pricing strategy, simplifies budgeting and delivers value through its comprehensive feature set and service. Despite higher initial costs, it offers a substantial ROI for enterprises needing robust, all-encompassing monitoring solutions.

To learn more, read our detailed Nagios Core vs. PRTG Enterprise Monitor Report (Updated: February 2026).

Buyer's Guide

Nagios Core vs. PRTG Enterprise Monitor

February 2026

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Review summaries and opinions

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

Categories and Ranking

Nagios Core

Ranking in Network Monitoring Software

10th

Average Rating

8.2

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

IT Infrastructure Monitoring (10th)

PRTG Enterprise Monitor

Ranking in Network Monitoring Software

31st

Average Rating

7.4

Reviews Sentiment

6.6

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of February 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 Enterprise Monitor is 0.6%, up from 0.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Network Monitoring Software Market Share Distribution
Product	Market Share (%)
Nagios Core	1.9%
PRTG Enterprise Monitor	0.6%
Other	97.5%

Network Monitoring Software

Featured Reviews

Husham Yaqoob

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.

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Emmanuel Appiah Boateng

Network and Security Engineer at a educational organization with 1,001-5,000 employees

Proactive monitoring has reduced network downtime and enables rapid incident response

The main benefits PRTG Enterprise Monitor provides for us include helping us respond quickly to network problems. For our virtualization switches, we normally use a different vendor, but I am not in charge of that particular system. I have not really used the pre-configured sensors feature in PRTG. A different team handles reporting. For now, nothing really comes to mind regarding additional functions for PRTG. I think it is good for what we use it for. I cannot really say much about technical support because I have never had a situation where I have to reach out. I would give PRTG Enterprise Monitor a final rating of eight. I would definitely recommend PRTG Enterprise Monitor to other users. I am an end user of the product. I am quite satisfied with the alerting part of PRTG, as it is quite good.

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Quotes from Members

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

Pros

"The application performance monitoring feature is valuable."

"I like that it's very simple to install, easy to manage and deploy, and easy to use for monitoring."

"The most valuable feature of Nagios Core is it allows us to develop and add as many plugins as we want."

"Nagios Core is very configurable. Whatever you want, you can do it."

"The most valuable feature depends on the project. It's great if you need to check to ensure a service is running 24/7. I can use the full solution for free, and it's flexible. If I need to add a dashboard, I can integrate it with Nagios. Cloud synchronization is wonderful."

"What I like about Nagios Core is that it helps me ensure everything is running smoothly by checking the status of hosts and services."

"It has made the life of the network operations staff more proactive in managing the resources of the infrastructure. It prevents disasters long before they can take place."

"Nagios Core integrates with tools like Splunk, Datadog, or Dynatrace. It is usually used as a feed to provide more technical information about devices or hosts to another system."

More Nagios Core pros

"If an event is detected, such as a resource running low on storage or RAM, the product will notify you via email. Upon receiving the notification, action must be taken to address and resolve the issue. The feature I find most effective is its comprehensive nature. It's like having a permanent eye monitoring the network and all its nodes. Instead of manual monitoring, it detects anomalies automatically and alerts us accordingly."

"PRTG is good and very easy to use."

"The solution's ability to monitor each and every aspect of our devices, such as memory utilization and port connectivity, is valuable."

"The product's most valuable feature is network analysis."

"It can identify downtimes and disruptions."

"The product is easy to use and you don't need to have any training. You can use it even if you don't have an IT background."

"The solution offers perfect real-time bandwidth monitoring and SNMP functionality."

"The product is easy to understand."

More PRTG Enterprise Monitor pros

Cons

"We're using the free version, which limits us in terms of the things that we can do. If we had the paid version, a lot of our issues would probably go away. For example, we can't isolate instances that are being built or updated with the production ones. When they're being built, on Nagios, they're showing in red. It'd be nice to be able to partition those off until they're all green, and then we can bring them into the environment. This is probably because we've got the free version and not the paid version. If we went for the paid version, it would probably allow us to do exactly what we want to or remove the restrictions that we have, but if we are able to isolate instances in the free version, it would make life much easier."

"The tool needs to improve the integrations."

"The interface could be improved."

"I believe Nagios Core will need to provide an option for big data platforms in the future."

"Would benefit from aggregations if a particular server goes down."

"The NetEase reporting structure needs improvement, especially the availability report, which is weak."

"t was a little hard to get our setup represented in the configuration."

"Making it a little easier to configure and set up from the start would help. There are multiple layers that you have to wade through to be able to set it up, to do it the right way, and to get it to do what you want it to do."

More Nagios Core cons

"There could be more security features included in PRTG Enterprise Monitor."

"The solution could be improved by including a processing monitor, possibly with a language interface like Lua, allowing for writing custom sensors and processing outcomes of inputs."

"The support must be improved."

"The licensing policy needs to change. The current model requires customers to purchase a minimum of two thousand licenses, which is not flexible for all customers."

"When it comes to dashboard customization in PRTG Enterprise Monitor, there are not too many options, and I think that would not be a strong point for PRTG, but for our use cases, we do not really need that kind of customization."

"The solution could be improved by introducing security features similar to those available in Teams, as the current version only monitors devices and does not integrate IoT or OT devices."

"The licensing policy needs to change."

More PRTG Enterprise Monitor cons

Pricing and Cost Advice

"The Nagios Core (PNP4Nagios + Core) is free and can be setup by Netadmin within a few hours. The only additional cost is the cloud server."

"The solution is expensive."

"Most the plugin features are free."

"We are using the open-source, unpaid version."

"We are using the free version."

"It's free."

"Nagios Core is a cheap solution."

"Nagios Core is an open source solution, and there are no licensing fees."

More Nagios Core pricing and cost advice

"I rate the product's pricing an eight to seven out of ten."

"The solution is affordable."

"The pricing is $2,149 for software without maintenance, and licenses are sold in the minimum bundle of 500 interfaces."

"PRTG Enterprise Monitor is an expensive product."

"PRTG Enterprise Monitor's pricing is reasonable."

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Top Industries

By visitors reading reviews

Computer Software Company

11%

Manufacturing Company

10%

Comms Service Provider

Government

Educational Organization

11%

University

10%

Healthcare Company

10%

Computer Software Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	20
Midsize Enterprise	11
Large Enterprise	22

By reviewers
Company Size	Count
Small Business	7
Midsize Enterprise	2
Large Enterprise	2

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.

See all answers

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.

See all answers

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...

See all answers

What do you like most about PRTG Enterprise Monitor?

If an event is detected, such as a resource running low on storage or RAM, the product will notify you via email. Upon receiving the notification, action must be taken to address and resolve the is...

See all answers

What is your experience regarding pricing and costs for PRTG Enterprise Monitor?

I would rate the pricing of PRTG Enterprise Monitor maybe a six. I think a six is fine, as it is reasonable and not expensive.

See all answers

What needs improvement with PRTG Enterprise Monitor?

When it comes to dashboard customization in PRTG Enterprise Monitor, there are not too many options, and I think that would not be a strong point for PRTG, but for our use cases, we do not really n...

See all answers

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Product Reports

Buyer's Guide

Nagios Core

January 2026

Download Nagios Core product report

Buyer's Guide

PRTG Enterprise Monitor

January 2026

Download PRTG Enterprise Monitor product report

Overview

This is IT infrastructure monitoring's industry-standard, open-source core. Free without professional support services.

Nagios

PRTG Enterprise Monitor serves enterprises by ensuring comprehensive monitoring of servers, services, and applications, empowering users to track sensor data effectively and detect performance or security issues across their networks.

PRTG Enterprise Monitor is widely recognized for its capability to efficiently monitor technical sensors such as ping, uptime, CPU load, and memory usage. It supports users in tracking network resource performance, detecting malicious activity, and preventing failures. Its custom frameworks enable monitoring of certificate expirations and process availability. The intuitive interface requires no specialized IT background, featuring agentless operations that enhance responsiveness and SNMP monitoring valued across platforms. The tool is appreciated for its anomaly detection and notification features, allowing users to address issues proactively. Installation is straightforward and support is robust, although users seek enhancements in real-time SMS alerts, SAP system integration, fault management, and more flexible manual configurations.

What are the key features of PRTG Enterprise Monitor?

Network Analysis: Offers in-depth insights into network performance.
Custom Dashboards: Provides a library for tailored dashboard creation.
Alerting System: Effective user notifications prevent escalation of issues.
Agentless Monitoring: Enhances response times without installing agents.
SNMP Monitoring: Useful for monitoring multiple platforms.

What benefits and ROI should users consider?

Easy Installation: Simplifies the setup process for companies.
Proactive Anomaly Detection: Identifies and resolves issues swiftly.
Comprehensive Coverage: Ensures efficient fault detection and management.
User Support: Strong support capabilities aid troubleshooting.

Enterprises in industries such as IT services, finance, and healthcare rely on PRTG Enterprise Monitor for monitoring critical infrastructure. This includes ensuring internet connectivity, monitoring mail services, and tracking network performance and security, thereby maintaining operational efficiency and service availability.

Paessler GmbH

Sample Customers

Airbnb, Cisco, PayPal, FanDuel

Information Not Available

Buyer's Guide

Nagios Core vs. PRTG Enterprise Monitor

February 2026

Free Report: Nagios Core vs. PRTG Enterprise Monitor

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