# Page 2 | Nagios Core Reviews 2026. Verified Reviews, Pros & Cons | Capterra > Page 2 - Is Nagios Core the right Website Monitoring solution for you? Explore 34 verified user reviews from people in industries like yours to make a confident choice. Source: https://www.capterra.com/p/152751/Nagios-Core/reviews --- Nagios Core 4.1 (34) [View alternatives](https://www.capterra.com/p/152751/Nagios-Core/alternatives/) Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Learn more](https://www.capterra.com/our-story/) * * * Last updated January 30th, 2026 # Page 2 - Reviews of Nagios Core ## Showing most helpful reviews Showing 26-34 of 34 Reviews Sort by: Most Helpful Rating Company Size Reviewer's Role Length of Use Frequency of Use GA Glyn A. Senior DBA Insurance Used the software for: 2+ years ### "Solid monitoring platform" September 20, 2018 4.0 Excellent Pros Used Nagios for alerting capabilities and it never let us down. Cons Slow development, most users migrate off to use Icinga (a fork of Nagios) instead for this reason. Review Source AM Alejandro M. support analyst Internet Used the software for: 1-2 years ### "is my first software in a network core and is an amazing software but, is not the most easy for use" November 29, 2017 4.0 it taught me everything on monitoring software Pros it have a nice map mode, show the status of all devices in the network: uptime, ping, packet loss. also show you the alerts history in the network, it use a very easy interface with basic colors: green for up status, yellow for packet loss and red for down status. the installation in the core is so easy, and more if you use linux. Cons Configuration is not so easy, and the interface is only in english, maybe they can add more language on the interface. Review Source JO Jose O. College Professor Education Management Used the software for: 6-12 months ### "It is a widely used open source network monitoring tool" March 7, 2018 4.0 Created to help administrators always have control over what is happening in the network they manage and know the problems that occur in the infrastructure network Pros There is no need to install a specialized agent in the client. In some cases only SNMP. It is an option for cases where it is not possible to install applications on clients Cons It can cause a greater load of activity on the client. You must install the Agent on all computers that will be monitored. Review Source CM Chris M. Systems Admin Used the software for: 6-12 months ### "We've had a lot of success using Nagios" January 11, 2018 5.0 We know a branch has gone down sometimes even before they are aware. It gives us the best chance of getting a branch back online before business is impacted. Pros It's great to have a way to track instantly when a branch goes down or when speeds may be effected due to abuse at a certain branch. Cons The fact that it's not very user friendly for people with little to no experience with command line, absent GUI for importing. Review Source SD Srikanth D. Technical Lead Information Technology and Services Used the software for: 2+ years ### "Excellent monitoring tool" August 18, 2020 5.0 It's very stable and easy to use once you understand it. Any dashboards with graphs/ trends will be very helpful. Pros Very effective for monitoring the applications/ hosts. Lot of features to customize the alerts according to our needs. Very stable Ability to toggle the alerts on or off at group or individual level. Cons UI/ Dashboards can be more effective. It's mostly in table formats. Has some initial learning curve to understand the tool. Review Source JR Juan R. Programmer Used the software for: 6-12 months ### "Tool for monitoring network devices widely used in academic networks and ISPs" March 17, 2018 4.0 Pros Nagios Core is an open source application, free and flexible when reviewing different services Its configuration is very simple and can be done in just minutes, starting from a file with the IPs of all the computers in the network and its host name, which is always usually at hand. Once this configuration is done, the tool starts to get all the reports. Cons The reports by Nagios are too simple but very useful when describing the toplogy of the network and the general information of the devices that we can find with SNMP Review Source AA Alejandro A. CTO Used the software for: 1-2 years ### "Excellent choice for monitor a server and a big network" April 25, 2018 4.0 Pros \-Very easy to install. -Based on Linux. -Effective tool for watch all conection on a big network. -Good for keeping track on the servers. -The interface is simple. -Use nagstamon for more efficency Cons \-Initial configure is easy but adminitrate it is for specialist. Is a amazing software it does it promises it's keeps his word Review Source GD Germano D. Arquiteto de infraestrutura Used the software for: 2+ years ### "Opensource main option to monitor your environment. Try it!" January 6, 2018 5.0 Opensource option in many companies. I may tell you that nearly everything is allowed to monitor or integrate in this tool. It's really amazing. Of course,some stuff require more time to do, that other applications, but certainly it can be done with nagios. I may say that if you didn't go what you want, you just not used the right plug-in. Pros Monitor even your soul. From Network, to automate the recovery, all you got to do with nagios! It's amazing! Servers, logs, ports, everything! Cons A little difficult to start and learn to use. But just a little bit. After sometime you learn and the sky is your limit. Review Source AD Arthur D. Founder Information Technology and Services Used the software for: Less than 6 months ### "Thanks, but no thanks!" September 19, 2017 2.0 Pros Well, at least I can say that it´s free and it´s on every Linux repository, so installation should be easy. Cons This application is very difficult to configure and its interface is terrible. I´d rather use another application. Review Source Similar Products Featured