

Nagios XI and PRTG Network Monitor are contenders in the network monitoring category. PRTG Network Monitor often gains the upper hand due to its ease of deployment and comprehensive monitoring experience.
Features: Nagios XI provides capabilities like monitoring network services, disk space, and CPU utilization. It allows user customization with open-source plugins and has a large community supporting it. PRTG Network Monitor is recognized for its ease of deployment, detailed network mapping, and comprehensive sensors, offering a user-friendly experience supported by a wide array of pre-configured checks and integrations.
Room for Improvement: Nagios XI requires plugins for additional services, lacks clustering and failover options, and presents complexities in scripting and configuration. PRTG Network Monitor could improve by enhancing its mobile app functionality, addressing GUI bugs, and strengthening third-party integrations. Improved training resources are also desired.
Ease of Deployment and Customer Service: Nagios XI offers flexibility in deployment environments and open-source support but has complex setup requirements. PRTG Network Monitor is praised for its easy deployment across cloud configurations, though its technical support receives varied reviews regarding responsiveness and documentation quality.
Pricing and ROI: Nagios XI is valued for its cost-efficient, open-source model with economical licensing. PRTG Network Monitor provides a flexible pricing model suitable for various business sizes, though recent transitions to subscription models have raised concerns about cost increases.
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.
The implementation reduced our employee resources from 20-25 to 5-6 employees.
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.
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.
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.
PRTG Network Monitor is very stable and requires low maintenance.
Many tools have poor user interfaces, making them hard to manage and navigate.
The GUI could be improved. It's a bit too basic.
The initial auto-discovery added too many unnecessary sensors, so auto-discovery should only take the necessary sensors into consideration.
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.
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.
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.
| Product | Market Share (%) |
|---|---|
| PRTG Network Monitor | 3.3% |
| Nagios XI | 2.3% |
| Other | 94.4% |


| Company Size | Count |
|---|---|
| Small Business | 22 |
| Midsize Enterprise | 17 |
| Large Enterprise | 21 |
| Company Size | Count |
|---|---|
| Small Business | 59 |
| Midsize Enterprise | 19 |
| Large Enterprise | 47 |
Nagios XI provides monitoring of all mission-critical infrastructure components, including applications, services, operating systems, network protocols, systems metrics, and network infrastructure. Third-party add-ons provide tools for monitoring virtually all in-house and external applications, services, and systems.
Nagios XI uses a powerful Core 4 monitoring engine that provides users with the highest levels of server monitoring performance. This high degree of performance enables nearly limitless scalability and monitoring powers.
With Nagios XI, stakeholders can check up on their infrastructure status using the role-based web interface. Sophisticated dashboards enable access to monitoring information and third-party data. Administrators can easily set up permissions so users can only access the infrastructure they are authorized to view.
Nagios XI Benefits and Features
Some of the benefits and top features of using Nagios XI include:
Reviews from Real Users
Nagios XI stands out among its competitors for a number of reasons. Several major ones are its integration options and monitoring abilities, as well as its alerting features.
David P., a senior DevOps engineer at EML Payments Ltd, writes, “We use Nagios as a network discovery tool. We use Nagios to maintain our uptime statistics and to monitor our services. It has allowed us to be much more sophisticated in our monitoring and alerting.”
An IT-OSS manager at a comms service provider notes, “Nagios XI has a custom API feature, and we can expose custom APIs for our integration. This is a great feature.”
PRTG Network Monitor runs on a Windows machine within your network, collecting various statistics from the machines, software, and devices which you designate. PRTG comes with an easy-to-use web interface with point-and-click configuration. You can easily share data from it with non-technical colleagues and customers, including via live graphs and custom reports. This will let you plan for network expansion, see what applications are using most of your connection, and make sure that no one is hogging the entire network just to torrent videos.
To monitor a large IT environment, it's important to be able to scale PRTG up. Paessler PRTG Enterprise Monitor includes all the proven capabilities of PRTG Network Monitor, which are enhanced by exclusive ITOps Board for a service-oriented, central overview of multiple PRTG servers.
We monitor all Network Monitoring Software reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.