Nagios Core vs Splunk ITSI (IT Service Intelligence) comparison

Nagios Core vs. Splunk ITSI (IT Service Intelligence)

January 2024

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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:

ROI

Sentiment score

8.9

Nagios Core boosted operational efficiency, reduced costs, minimized downtime, and significantly improved productivity and disaster recovery times.

Sentiment score

6.5

Splunk ITSI reduces costs over 60%, improves resilience, offers quick data access, and enhances ROI with effective self-service management.

No quotes available

For more quotes and insights, download the Nagios Core report

We estimate a 30 to 35 percent saving on resource costs and around 25 to 30 percent savings on inventory expenses, all credited to utilizing Splunk ITSI (IT Service Intelligence) effectively.

Bharath G

SIEM Splunk Engineer/Architect at Cepheid

Risks can mean that if one failure happens, it can result in risks in hundreds of thousands of USD.

SaketShrivastava

Technology And Digitization Lead at JLL

It has saved me a lot of money and a lot of time.

Karthik Palepu

IT Associate at Accenture

For more quotes and insights, download the Splunk ITSI (IT Service Intelligence) report

Customer Service

Sentiment score

5.5

Nagios Core relies on community and documentation for support, offering valuable resources but facing scalability and consistency challenges.

Sentiment score

6.6

Splunk ITSI support receives mixed reviews; users appreciate responsiveness but cite inconsistent response times and outsourced support issues.

No quotes available

For more quotes and insights, download the Nagios Core report

The technical support is excellent, and I would rate it at ten.

Senior consultant at a tech services company with 51-200 employees

We typically have weekly calls with the technical staff, and whenever we encounter issues, they usually reply with solutions within one or two days.

For more quotes and insights, download the Splunk ITSI (IT Service Intelligence) report

Senior Consultant at a consultancy with 10,001+ employees

I would rate Splunk ITSI (IT Service Intelligence) support at nine or 9.5 because it is a highly effective and handy tool.

Jyoti K

Splunk Developer ( Training & Enablement) at DXC Technology

Scalability Issues

Sentiment score

7.6

Nagios Core is highly scalable, supporting diverse infrastructures with open-source flexibility, despite some horizontal scaling concerns.

Sentiment score

7.6

Splunk ITSI offers scalable infrastructure management with adaptable features but faces challenges with data storage costs and memory constraints.

The solution is scalable.

For more quotes and insights, download the Nagios Core report

Senior System Administrator at Interactive Group

Splunk is highly scalable, with the ability to expand efficiently.

Senior consultant at a tech services company with 51-200 employees

When we create Glass Tables containing many searches, the Glass Tables sometimes fail due to memory constraints, and we receive error pages.

For more quotes and insights, download the Splunk ITSI (IT Service Intelligence) report

Senior Consultant at a consultancy with 10,001+ employees

Splunk ITSI (IT Service Intelligence) scalability allows us to predict analytics such as service degradation and perform root cause analysis through metrics, logs, and traces.

Manoj-Agarwal

Sr. Technical Manager at Vodafone

Stability Issues

Sentiment score

8.6

Nagios Core is highly stable and reliable, offering exceptional performance on Linux with minimal plugin-related issues.

Sentiment score

7.7

Users rate Splunk ITSI highly for stability, with minor issues often due to setup; performance improves with proper hardware.

I tried many other solutions at work, however, in terms of Nagios, I haven't seen any disruption or downtime.

For more quotes and insights, download the Nagios Core report

Senior System Administrator at Interactive Group

The setup, however, must be done correctly as incorrect deployment can lead to issues.

Senior consultant at a tech services company with 51-200 employees

Splunk ITSI (IT Service Intelligence) fails if you do not have good hardware requirements.

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Senior Consultant at a consultancy with 10,001+ employees

I would rate the stability of Splunk ITSI (IT Service Intelligence) as a perfect ten; it is an extremely stable tool.

Jyoti K

Splunk Developer ( Training & Enablement) at DXC Technology

Room For Improvement

Nagios Core needs a modernized interface, simplified configuration, scalability, and integration with tools like Grafana for improved usability.

Splunk ITSI needs improved integration, UI, and dashboards, with enhanced real-time alerts, documentation, AI features, and simplified configurations.

No quotes available

For more quotes and insights, download the Nagios Core report

I would appreciate additional features in the next release of Splunk ITSI (IT Service Intelligence) such as cloud infrastructure monitoring including CICDs, Kubernetes, and similar technologies.

Ahmed Naguib

Director at Techpace

On-cloud upgrades are easy, but on-premises upgrades are very painful.

SaketShrivastava

Technology And Digitization Lead at JLL

Splunk ITSI could benefit from including more features that other solutions support, such as vulnerability management modules.

For more quotes and insights, download the Splunk ITSI (IT Service Intelligence) report

Senior consultant at a tech services company with 51-200 employees

Setup Cost

Nagios Core provides cost-effective, open-source monitoring with engineering setup and maintenance, requiring customization expertise for full benefits.

Splunk ITSI is a premium, costly application with pricing based on data usage, but many justify its capabilities.

No quotes available

For more quotes and insights, download the Nagios Core report

Splunk ITSI tends to be more expensive compared to some open-source solutions.

Senior consultant at a tech services company with 51-200 employees

I believe the pricing is based on daily volume ingestion.

For more quotes and insights, download the Splunk ITSI (IT Service Intelligence) report

Senior Consultant at a consultancy with 10,001+ employees

The pricing reflects usage levels, and compared to others in the market, Splunk ITSI (IT Service Intelligence) provides a reasonable solution.

Dwarika Nath Mohanty

Works at a tech services company with 1,001-5,000 employees

Valuable Features

Nagios Core offers extensible plugins, alerting, customizable dashboards, proactive monitoring, and integration, enhancing system reliability and minimizing downtime.

Splunk ITSI enhances IT operations with AI insights, predictive analytics, and customizable dashboards, improving efficiency and service monitoring.

You can monitor anything.

For more quotes and insights, download the Nagios Core report

Senior System Administrator at Interactive Group

The predictive analysis can give you proactive information about potential bottlenecks that can occur on applications, desk, storage, SQL servers, databases, or other systems.

Ahmed Naguib

Director at Techpace

One valuable feature is the scheduled maintenance window provided by Splunk ITSI (IT Service Intelligence) because Splunk does not offer this scheduling maintenance feature in the core product, but Splunk ITSI (IT Service Intelligence) helps us with these maintenance reports.

For more quotes and insights, download the Splunk ITSI (IT Service Intelligence) report

Senior Consultant at a consultancy with 10,001+ employees

The most beneficial aspect for me is that it is AI-enabled, providing us with very good analytics.

SaketShrivastava

Technology And Digitization Lead at JLL

Categories and Ranking

Nagios Core

Average Rating

8.2

Reviews Sentiment

7.3

Number of Reviews

Ranking in other categories

Network Monitoring Software (10th), IT Infrastructure Monitoring (10th)

Splunk ITSI (IT Service Int...

Average Rating

8.4

Reviews Sentiment

6.7

Number of Reviews

Ranking in other categories

Application Performance Monitoring (APM) and Observability (11th), IT Alerting and Incident Management (3rd)

Mindshare comparison

While both are Systems Management solutions, they serve different purposes. Nagios Core is designed for Network Monitoring Software and holds a mindshare of 1.9%, down 3.0% compared to last year.
Splunk ITSI (IT Service Intelligence), on the other hand, focuses on IT Alerting and Incident Management, holds 1.9% mindshare, down 4.1% since last year.

Network Monitoring Software Mindshare Distribution
Product	Mindshare (%)
Nagios Core	1.9%
Zabbix	5.0%
SolarWinds NPM	3.6%
Other	89.5%

Network Monitoring Software

IT Alerting and Incident Management Mindshare Distribution
Product	Mindshare (%)
Splunk ITSI (IT Service Intelligence)	1.9%
PagerDuty Operations Cloud	13.1%
Opsgenie	9.1%
Other	75.9%

IT Alerting and Incident Management

Featured Reviews

Monitoring solution provides comprehensive visibility across IT infrastructure

Senior System Administrator at Interactive Group

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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Service health has been monitored and visual insights support proactive telecom operations

Senior Consultant at a consultancy with 10,001+ employees

The installation process is the first aspect I dislike about Splunk ITSI (IT Service Intelligence). If you do not configure it correctly, you will encounter issues in the search head. Because we use a distributed environment where each component has its own specific roles, installation is critical and requires careful attention. Splunk ITSI (IT Service Intelligence) is built with many applications. It is a compressed file, and when you extract the Splunk ITSI (IT Service Intelligence) app, you receive approximately 19 apps. Some applications, add-ons, and packages must be installed on specific components. If you do not configure an application correctly, it will not work. Sometimes we encounter issues during installation because of this complexity. I believe the installation process should be more uniform, meaning it could be deployed across all components to avoid post-installation issues. Sometimes after installation, you receive errors, and users cannot access Splunk ITSI (IT Service Intelligence). We have experienced this type of issue due to installation errors. I believe there is currently room for improvement regarding scalability. When we create Glass Tables containing many searches, the Glass Tables sometimes fail due to memory constraints, and we receive error pages. Splunk ITSI (IT Service Intelligence) should have a lightweight version to address these concerns. I would rate current scalability as medium.

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Top Industries

By visitors reading reviews

Manufacturing Company

10%

Computer Software Company

10%

Comms Service Provider

10%

Government

Financial Services Firm

16%

Manufacturing Company

10%

Computer Software Company

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	20
Midsize Enterprise	11
Large Enterprise	23

By reviewers
Company Size	Count
Small Business	14
Midsize Enterprise	10
Large Enterprise	42

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.

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.

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...

What do you like most about Splunk ITSI (IT Service Intelligence)?

Our mean time to detect is down to five minutes.

What is your experience regarding pricing and costs for Splunk ITSI (IT Service Intelligence)?

Regarding pricing, since Splunk ITSI (IT Service Intelligence) is a flavor of Splunk, there are no fixed prices as it depends on data volume. It is indeed a premium app within Splunk. The pricing r...

What needs improvement with Splunk ITSI (IT Service Intelligence)?

As per my analysis of Splunk ITSI (IT Service Intelligence), I do not see much room for improvement. My experience as a mid-level user suggests that deep knowledge is helpful to maximize the tool's...

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Product Reports

Download Nagios Core product report

Nagios Core

February 2026

Splunk ITSI (IT Service Intelligence)

February 2026

Splunk ITSI (IT Service Intelligence) report

Download Splunk ITSI (IT Service Intelligence) product report

Overview

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

Nagios

Splunk IT Service Intelligence (ITSI) is a powerful analytics-driven monitoring and analytics solution that provides real-time insights into the health and performance of IT services.

It enables organizations to proactively identify and resolve issues, optimize service delivery, and improve overall IT operations. With its advanced machine learning capabilities, ITSI automatically detects anomalies, predicts future events, and prioritizes alerts based on business impact.

The solution offers a centralized view of IT services, allowing users to visualize and analyze data from multiple sources in a single dashboard. ITSI also provides customizable KPIs, service-level agreements (SLAs), and key performance indicators (KPIs) to measure and track service performance.

With its intuitive interface and powerful analytics capabilities, Splunk ITSI empowers IT teams to deliver reliable and efficient services, ensuring maximum uptime and customer satisfaction.

Splunk

Sample Customers

Airbnb, Cisco, PayPal, FanDuel

TransUnion, Cox Automotive, Carnival Cruises, Leidos, Econocom, National Ignition Factory, Entrust Datacard, Molina Healthcare, United States Census Bureau