# Nagios Core Software Pricing, Alternatives & More 2026 | Capterra > With the help of Capterra, learn about Nagios Core Software - reviews, pricing plans, popular comparisons to other Website Monitoring products and more. Source: https://www.capterra.com/p/152751/Nagios-Core --- # Nagios Core Software Review 2026: Features, Integrations, Pros & Cons Last updated on January 30, 2026 Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. Independent research methodology Capterra’s researchers use a mix of verified reviews, independent research and objective methodologies to bring you selection and ranking information you can trust. While we may earn a referral fee when you visit a provider through our links or speak to an advisor, this has no influence on our research or methodology. [Learn more](https://www.capterra.com/resources/proprietary-data-research/) How Capterra verifies reviews Capterra carefully verified over 2.5 million+ reviews to bring you authentic software experiences from real users. Our human moderators verify that reviewers are real people and that reviews are authentic. They use leading tech to analyze text quality and to detect plagiarism and generative AI. [Learn more](https://www.capterra.com/resources/how-we-verify-reviews/) How Capterra ensures transparency Capterra lists all providers across its website—not just those that pay us—so that users can make informed purchase decisions. Capterra is free for users. Software providers pay us for sponsored profiles to receive web traffic and sales opportunities. Sponsored profiles include a link-out icon that takes users to the provider’s website. [Learn more](https://www.capterra.com/resources/how-we-ensure-transparency/) [Description](#description)[Use cases](#use-cases)[Alternatives](#alternatives)[Features](#features)[Pricing](#pricing)[Support](#support)[Reviews](#reviews) Nagios Core ## What is Nagios Core? Nagios Core is a free, open-source IT infrastructure monitoring solution that gives IT teams real-time visibility into servers, network devices, applications, services, and custom metrics. It continuously checks system status and performance, notifying administrators when issues occur and resolve so teams can respond quickly and maintain uptime. Built on a powerful, extensible engine, Nagios Core supports thousands of community-developed plugins and integrations that enable monitoring of virtually any host, service, or device. Its flexible alerting system includes email, SMS, and custom notification methods, while its plugin architecture allows teams to tailor checks and metrics for unique environments. Nagios Core runs on Linux and UNIX system and is ideal for organizations that want full control over their monitoring infratructure, zero licensing costs, and the ability to configure and extend monitoring through an active open-source community. ## What is Nagios Core used for? [Website Monitoring](https://www.capterra.com/website-monitoring-software/) Top alternative Featured Overall rating Based on 34 user reviews Reviews sentiment Positive 76% Neutral 21% Negative 3% Contact vendor for pricing Free trial available Capterra Shortlist charts the highest-rated and most popular products... Our "Best of" badge program showcases products with the highest ratings... Our "Best of" badge program showcases products with the highest ratings... Do you work for Nagios Core?[Manage this product listing](https://digitalmarkets.gartner.com/get-listed/claim-bx?url=https://www.nagios.com&name=Nagios Core) ## Compare with a popular alternative Capterra selects software alternatives based on relevant features, verified user reviews and user interactions. Placement may be influenced by client status. ### Nagios Core 4.1 (34) VS. [4.7 (347)](https://www.capterra.com/p/168192/Site24x7/reviews/) Starting Price Contact vendor Starting Price $10 Flat Rate, Per Month Free Trial Free Version Pricing Options Free Trial Free Version Ease Of Use 3.5 (34) Ease Of Use 4.5 (346) Value For Money 4.5 (24) Value For Money 4.5 (318) Customer Service 3.4 (22) Customer Service 4.5 (313) ## Nagios Core alternatives [4.7 (107)](https://www.capterra.com/p/80467/Uptrends/reviews/) Starting price $100.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 94% of reviewers rated it above 4 stars [4.7 (260)](https://www.capterra.com/p/150695/Lucky-Orange/reviews/) Starting price $39.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 95% of reviewers rated it above 4 stars [4.6 (258)](https://www.capterra.com/p/172323/ManageEngine-Applications-Manager/reviews/) Starting price $395.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 97% of reviewers rated it above 4 stars Highest Rated [Uptimerobot](https://www.capterra.com/p/234440/Uptimerobot/) [4.8 (73)](https://www.capterra.com/p/234440/Uptimerobot/reviews/) Starting price $7.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 97% of reviewers rated it above 4 stars [Learn More](https://www.capterra.com/p/234440/Uptimerobot/) [View all alternatives](https://www.capterra.com/p/152751/Nagios-Core/alternatives/) ## Features Features with the highest number of reviews are displayed first. Those that have no reviews appear next, sorted alphabetically. Alerts/Notifications 4.6 (8) 87.50% of 8 reviewers that rated this feature as important or highly important Alerts or notifications of various types such as pop-up messages, sounds, banners, or badges API Application programming interface that allows for integration with other systems/databases Data Visualization Graphical representation of data Server Monitoring Continuously scan servers on a designated network to monitor health and search for any irregularities or failures User Management Manage user accounts, profiles, roles, permissions, and other details across applications, devices or networks Nagios Core 5 features Alerts or notifications of various types such as pop-up messages, sounds, banners, or badges Application programming interface that allows for integration with other systems/databases Graphical representation of data Continuously scan servers on a designated network to monitor health and search for any irregularities or failures Manage user accounts, profiles, roles, permissions, and other details across applications, devices or networks Features 4.1 (34) 4.1 Based on 34 reviews ## Pricing Value for money 4.5 (24) Free Trial Free Version Free Open-Source $0.00 Value for money 4.5 (24) 4.5 Based on 24 reviews ## Support, customer service and training options Customer Service 3.4 (22) Support - Email/Help Desk - FAQs/Forum - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat Training - In Person - Live Online - Webinars - Documentation - Videos Deployment - Web - Android - iPhone/iPad Typical users - Freelancers - Small businesses - Mid size businesses - Enterprises Customer Service 3.4 (22) 3.4 Based on 22 reviews ## User reviews Overall rating 4.1 Based on 34 reviews Filter by rating 5(13) 4(13) 3(7) 2(1) 1(0) Mentioned topic Sorted by most recent SS Stefano S. Administrator Information Technology and Services ### "A powerful and open source monitoring software that can satisfy company needs" 4.0 Overall Rating 4.0 4.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 0.0 0.0 Likelihood to Recommend 8/10 April 14, 2024 Pros It is open and it can connect to potentially everything. Also as it is open source you can try it withound spending money. Lately maintenance costs, if you decide to pay for commercial support, is quite high. Cons Software is quite easy to use and it is opensource but the commercial support is starting to be quite high. At this point it could be useful to evaluate other commercial products as it appears that it could be really expensive. The alternative is to use it without the commercial support but maybe some integrations cannot be done and also if you are a company maybe you could be in the need of support and then you have to buy commercial support. Review source Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. OM Oscar M. Ingenieria y Operaciones Internet ### "Nagios, un sistema de monitorización con addons para todo." 4.0 Overall Rating 4.0 4.0 Ease of Use 5.0 5.0 Features 4.0 4.0 Customer Service 2.0 2.0 Likelihood to Recommend 10/10 December 30, 2022 Pros La cantidad de addons disponibles para cualquier servicio. Cons La poca disponibilidad de mapas para tener una vista global de todo lo monitorizado. Review source Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. PP Paul P. IT infrastructure manager Retail ### "Nagiis Core us good free tools" 5.0 Overall Rating 5.0 5.0 Ease of Use 3.0 3.0 Features 5.0 5.0 Customer Service 0.0 0.0 Likelihood to Recommend 4/10 December 9, 2022 Pros it's free product, no need pay for add Monitoring Cons it is a difficult product to maintain, we need a continuous nagios administrator Review source Non-incentivized review: any software user can leave a review for any product listed on our site. All submitted reviews are subject to our verification process prior to publication. SK Seth K. IT Manager Individual & Family Services ### "Nagios Core - Significant up front investment of time, but still a solid option" 5.0 Overall Rating 5.0 5.0 Ease of Use 2.0 2.0 Features 4.0 4.0 Customer Service 0.0 0.0 Likelihood to Recommend 10/10 September 19, 2022 Pros Free, open-source solution with a long track record for IT infrastructure monitoring. Vibrant community contributing to the core project, as well as plugins. Also, lots of 3rd party integrations to further extend capabilities as needed. Cons There are easier solutions to use if you are starting from scratch, many of which are derivatives of Nagios. I wouldn't recommend Nagios unless you are comfortable using Linux and doing configuration changes from the command line. Also, version 4.4.7 has a bug that requires a workaround Reasons for choosing Nagios Core Existing configuration was easier to upgrade versus starting new Review source Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. Samuel C. Engineer Telecommunications ### "Reliable and comprehensive monitoring for startups and beyond" 5.0 Overall Rating 5.0 5.0 Ease of Use 4.0 4.0 Features 5.0 5.0 Customer Service 0.0 0.0 Likelihood to Recommend 10/10 July 8, 2022 With Nagios Core we are solving the necessity to keep every single aspect of business critical services we need to guarantee an SLA for. Having notifications and alerts for everything that is happening in your network is a great benefit to keep an edge over competitors. We are very pleased with this free software that delivers despite the difficult implementation. Pros Nagios is the way to go to actively monitor essentially every single aspect of your tech infrastructure. It is known that having a great response time in case of outages and proactively monitor services before a breakdown occurs is critical to keep customers happy. Nagios Core does exactly that and way more. However, be warned, integration is terribly hard if you want to do advanced configuration. There is a lot of sysadmin/networking/software knowledge that needs to be covered before you get this very special type of monitoring so you may find yourself with small snags that don't let your dream monitoring service come alive but at the end, it is totally doable with Nagios Core. Cons Documentation could be better organized and a few additional GUIs for quick configuration would be a desirable thing. The main interface is very very lean, probably old-style with html4-like visuals and controls but it is effective and light. We basically had an issue with implementing custom plugins to monitor essential aspects of our business, Python scripting was needed but getting this to work effectively on Nagios was another issue. Again, it has a steep learning curve but with time, you can master it. Review source Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. WT Walin T. Administrador de Servidores Government Administration ### "Un muy buen Monitoreo de tu infraestructura" 5.0 Overall Rating 5.0 5.0 Ease of Use 3.0 3.0 Features 5.0 5.0 Customer Service 4.0 4.0 Likelihood to Recommend 8/10 April 25, 2022 es un buen software gratuito pero si puediera pagar por un software de monitoreo mejor irse a la version paga. Pros lo que mas me gusta es que es gratis y open source puedo adaptarlo como quiera. Cons la administracion y configuracion es muy engorrosa ya que todo es hacerlo por los archivos. Review source Non-incentivized review: any software user can leave a review for any product listed on our site. All submitted reviews are subject to our verification process prior to publication. CH Carlos Hugo Martin C. Consultor Information Technology and Services ### "Experience with Nagios Core" 4.0 Overall Rating 4.0 4.0 Ease of Use 5.0 5.0 Features 3.0 3.0 Customer Service 5.0 5.0 Likelihood to Recommend 7/10 January 3, 2022 Small data center monitoring Pros Its ease of use and implementation for basic monitoring. Cons Its complexity for integration with other monitoring tools, either as a hub or as a data source. When more advanced monitoring is required or for a specific technology, you have to resort to third-party tools. Review source Non-incentivized review: any software user can leave a review for any product listed on our site. All submitted reviews are subject to our verification process prior to publication. AU Anonymous User Sysadmin Information Services ### "Another monitoring tool" 3.0 Overall Rating 3.0 3.0 Ease of Use 2.0 2.0 Features 2.0 2.0 Customer Service 0.0 0.0 Likelihood to Recommend 4/10 June 18, 2021 I use it for five monts and do the work but i switch to another tool called Zabbix. Pros It can be downloaded as a free app. The web interface help for external use. Cons Poor community support. hard to get it working for a general purpose monitoring client. Switched from [Pingdom](https://www.capterra.com/p/131928/Pingdom/) This tool only do a few stats. Alternatives considered [Datadog](https://www.capterra.com/p/135453/Datadog-Cloud-Monitoring/) [Prometheus](https://www.capterra.com/p/209529/Prometheus/) Review source Non-incentivized review: any software user can leave a review for any product listed on our site. All submitted reviews are subject to our verification process prior to publication. AU Anonymous User Software Developer Hospitality ### "Best network monitoring software" 5.0 Overall Rating 5.0 5.0 Ease of Use 4.0 4.0 Features 5.0 5.0 Customer Service 0.0 0.0 Likelihood to Recommend 10/10 May 18, 2021 I have been part of inhouse development team to write plugins for Nagios. It was in-fact fun to work. Learned a lot about this tool and how the monitoring works Pros Can be customized to monitor variety of network devices and services, can use plugins or develop own for custom work Cons Minimal support as compared to paid sotwares in the same niche. Not fully functional in the beginning and need a lot of customizations and developments to fulfil custom needs Review source Incentivized review: software users are invited to submit an honest review and offered a nominal incentive for their time and effort. All incentivized reviews are subject to our verification process prior to publication. AU Anonymous User CIO Information Technology and Services ### "Nagios IT Asset monitoring and Performance" 3.0 Overall Rating 3.0 3.0 Ease of Use 2.0 2.0 Features 4.0 4.0 Customer Service 3.0 3.0 Likelihood to Recommend 6/10 August 21, 2020 Due to complexity of configuration we switched to Manage Engine OpManager suite Pros Nagios is a powerful monitoring tool with a variety of monitoring assets and protocols. Cons The tool and monitoring configuration is complex and not optimal for not highly experienced system administrators Review source Non-incentivized review: any software user can leave a review for any product listed on our site. All submitted reviews are subject to our verification process prior to publication. [View all Reviews](https://www.capterra.com/p/152751/Nagios-Core/reviews/) ## Top-rated software of 2026 ### Fill out the form and we'll send a list of the top-rated software based on real user reviews directly to your inbox. Popular comparisons [Site24x7 vs Nagios Core](https://www.capterra.com/compare/152751-168192/Nagios-Core-vs-Site24x7) [Uptimerobot vs Nagios Core](https://www.capterra.com/compare/152751-234440/Nagios-Core-vs-Uptimerobot)  Independent research methodology Capterra's researchers use a mix of verified reviews, independent research and objective methodologies to bring you selection and ranking information you can trust. While we may earn a referral fee when you visit a provider through our links or speak to an advisor, this has no influence on our research or methodology. [Learn more](https://www.capterra.com/resources/proprietary-data-research/) How Capterra verifies reviews Capterra carefully verified over 2.5 million+ reviews to bring you authentic software experiences from real users. Our human moderators verify that reviewers are real people and that reviews are authentic. They use leading tech to analyze text quality and to detect plagiarism and generative AI. [Learn more](https://www.capterra.com/resources/how-we-verify-reviews/) How Capterra ensures transparency Capterra lists all providers across its website—not just those that pay us—so that users can make informed purchase decisions. Capterra is free for users. Software providers pay us for sponsored profiles to receive web traffic and sales opportunities. Sponsored profiles include a link-out icon that takes users to the provider's website. [Learn more](https://www.capterra.com/resources/how-we-ensure-transparency/)