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Graylog vs IBM Security QRadar vs Splunk Enterprise Security comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

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

Mindshare comparison

As of September 2025, in the Log Management category, the mindshare of Graylog is 6.2%, up from 6.1% compared to the previous year. The mindshare of IBM Security QRadar is 3.8%, down from 4.6% compared to the previous year. The mindshare of Splunk Enterprise Security is 7.6%, down from 9.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Log Management Market Share Distribution
ProductMarket Share (%)
Splunk Enterprise Security7.6%
IBM Security QRadar3.8%
Graylog6.2%
Other82.4%
Log Management
 

Featured Reviews

Ivan Kokalovic - PeerSpot reviewer
Facilitates backend service monitoring with efficient log retrieval and API flexibility
Graylog is valuable because it bridges technical knowledge to non-technical teams, presenting complex backend processes in a simple timeline. It boosts the knowledge of sales and customer support teams by allowing them to see the backend operations without needing to read the code. Its API is flexible for visualization, and its powerful search engine efficiently handles large volumes of log data. Moreover, its stability, fast search capabilities, and compatibility with languages like ANSI SQL enhance its utility in IT infrastructure.
Mahmoud Younes - PeerSpot reviewer
Reliable installation and diverse use cases provide strong value
IBM Security QRadar has some areas for improvement. We have missed some DSM components. We need to customize logs where there is no DSM or connector for certain products. We can integrate but we have missed the DSM, which is the connector to pass logs coming from different applications. For example, with a university customer, we tried onboarding Canvas service. IBM Security QRadar does not support Canvas, so we had to create custom scripts and workarounds to pull logs from Canvas.
ROBERT-CHRISTIAN - PeerSpot reviewer
Has many predefined correlation rules and is brilliant for investigation and log analysis
It is very complicated to write your own correlation rules without the help of Splunk support. What Splunk could do better is to create an API to the standard SIEM tools, such as Microsoft Sentinel. The idea would be to make it less painful. In ELK Stack, Kibana is the query language with which you can search log files. I believe Splunk has also a query language in which they search their log files, but once you have identified the log file that you want to use for further security correlation, you want to very quickly transport that into your SIEM tool, such as Microsoft Sentinel. That is something that Splunk could make a little bit less painful because it is a lot of effort to find that log file and forward it. An API with Microsoft Sentinel or a similar SIEM tool would be a good idea.

Quotes from Members

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

Pros

"It is used as a log manager/SIEM. It provides visibility into the infrastructure and security related events."
"Graylog is very handy."
"It has data adapters and lookup tables that utilize HTTP calls to APIs."
"The Graylog features that have proven to be most beneficial for our data analysis in particular are that we tend to use it as a big data store, so we have the correlation rules that, if something matches under certain conditions, it raises an alarm."
"We have scaled from a single machine installation (a VM with a Graylog + ES + MongoDB) to (2 Graylog + 2 ES + 3 MongoDB). This was done smoothly with a minimal impact on logging."
"Graylog's search functionality, alerting functionality, user management, and dashboards are useful."
"One of the most valuable features is that you are able to do a very detailed search through the log messages in the overview."
"We're using the Community edition, but I know that it has really good dashboarding and alerts."
"It helps us discover any threats with their alerts and tracking."
"Integrations are quite a useful and key feature of this solution. It has integration with the CVSS score, which is a central point for all the data and scores about the threats. There is an IBM Bluemix dashboard that is integrated with the CVSS score."
"It integrates very easily with other solutions. The solution is flexible. We can add anything to it, as it is a good companion to other tools."
"We are using the platform version, which I like."
"I would rate IBM Security QRadar nine out of ten."
"Customer service is very good and very helpful."
"There are a lot of great out-of-the-box features included."
"We get events and make the correlation, or rules. In IBM, we can implement our customer's rules. We can have very clear status threats and severity of antigens."
"It can log more logs than other solutions. It's a good way to troubleshoot problems."
"It's better than IBM, in my opinion, because it's an independent entity."
"The most valuable features are how stable and easy to use Splunk is."
"The dashboard and reporting are very good... It provides very good visibility in a hybrid cloud environment, and you can build custom utilization APIs using Splunk."
"It gives us the liberty to do more in terms of use cases."
"We evaluated several solutions and selected Splunk due to the functionality and cost."
"The best part of Splunk Enterprise Security is its customizable settings."
"Its compatibility with other SIEMS is very useful."
 

Cons

"The biggest problem is the collector application, as we wanted to avoid using Graylog Collector Sidecar due to its architecture."
"Its scalability gets complicated when we have to update or edit multiple nodes."
"I would like to see some kind of visualization included in Graylog."
"I hope to see improvements in Graylog for more interactivity, user-friendliness, and creating alerts. The initial setup is complex."
"Lacks sufficient documentation."
"There should be some user groups and an auto sign-in feature.​"
"When it comes to configuring the processing pipeline, writing the rules can be very tedious, especially since the documentation isn't extensive on how the functions provided for these rules work."
"I would like to see a date and time in the Graylog Grok patterns so that I can save time when searching for a log. I like how the streams and the search query work, but adding a date and time will allow me to pull out a log in a milli-second."
"There are areas in IBM Security QRadar that could benefit from improvement. Its ability to customize knowledge for specific purposes could be enhanced. Also, it lacks clarity in presenting details. It is also difficult to see the reports."
"The quoting and the dashboard session could be improved. It should be more user-friendly."
"The solution should enhance its capabilities of UEBA and AI/ML tech modeling."
"Do your research before implementing it, because it is tough to implement."
"The only problem is that if you have too many events that occur, then the storage capacity becomes a problem. We would need to increase the storage capacity."
"Before we didn't have any security issues but recently a few of the user emails were hacked. We had to actually recreate their emails for them."
"I have noticed a few things while working on this. After the restart of the server, sometimes, the services misbehave, and you need to manually start or restart the service. I have seen that specifically with the Tomcat service. Sometimes, when you click on log sources, instead of opening the log source extension, it redirects you over the internet."
"The AI engine could be smarter."
"It needs integration with a configuration management solution."
"I think the only thing lacking is that there are some answers that I couldn't find about the tool without reaching out to support, and it had to be escalated to the engineering team."
"Our two main complaints are about the difficulty of the initial setup and the licensing model."
"This is a costly solution."
"An improved user interface along with multi-tenancy support would be beneficial."
"In the next release, they should include machine learning-based rules that would streamline the process of finding anomalies."
"They can improve their support teams. They can also improve their capability of ingesting data from different IoT sources."
"Writing queries is a bit complicated sometimes."
 

Pricing and Cost Advice

"Having paid official support is wise for projects."
"If you want something that works and do not have the money for Splunk or QRadar, take Graylog.​​"
"I am using a community edition. I have not looked at the enterprise offering from Graylog."
"We are using the free version of the product. However, the paid version is expensive."
"I use the free version of Graylog."
"​You get a lot out-of-the-box with the non-enterprise version, so give it a try first."
"It's open source and free. They have a paid version, but we never looked into that because we never needed the features of the paid version."
"We're using the Community edition."
"You have a one-time payment, and you also can purchase it for one year as a subscription. We have it on-premise, and we have a permanent license for it. We have to pay for the support on a yearly basis. If you compare its cost with Sentinel for one year, QRadar would seem more expensive, but if you compare its cost over five or ten years, Azure Sentinel will be more expensive than QRadar. If you compare its cost with Sentinel for one year, QRadar would seem more expensive, but if you compare its cost over five or 10 years, Azure Sentinel can be more expensive than QRadar."
"I would like for them to lower the price."
"It's too expensive."
"The price of this solution is a little high."
"There is a license required for this solution."
"We use QRadar as a managed service and we pay licensing fees to the partner."
"Pricing (based on EPS) will be more accurate."
"The tool is priced in a competitive manner. The tool's price is dependent on the installation and the product size, but it is competitive in the marketplace."
"Our customers often complain that the price of Splunk is too high."
"In terms of pricing, I believe Splunk is unreasonably costly for the majority of mid and small-sized companies."
"Expensive compared to other options."
"Some of the insights that we have obtained as a part of using Splunk have greatly helped us in increasing our revenue in terms of selling our products."
"Splunk Enterprise Security's pricing is based on data volume, which generally suits large enterprises."
"Splunk Enterprise Security's pricing is pretty competitive."
"While some clients find the cost of Splunk Enterprise Security to be on the higher end, its pricing is comparable to other SIEM solutions."
"Splunk Enterprise Security is an expensive solution."
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Comparison Review

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Feb 26, 2015
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We at Infosecnirvana.com have done several posts on SIEM. After the Dummies Guide on SIEM, we are following it up with a SIEM Product Comparison – 101 deck. So, here it is for your viewing pleasure. Let me know what you think by posting your comments below. The key products compared here are…
 

Top Industries

By visitors reading reviews
Computer Software Company
16%
Comms Service Provider
10%
Government
8%
University
7%
Computer Software Company
15%
Financial Services Firm
11%
Manufacturing Company
7%
Government
7%
Computer Software Company
14%
Financial Services Firm
14%
Manufacturing Company
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise4
Large Enterprise7
By reviewers
Company SizeCount
Small Business88
Midsize Enterprise36
Large Enterprise102
By reviewers
Company SizeCount
Small Business105
Midsize Enterprise44
Large Enterprise225
 

Questions from the Community

What do you like most about Graylog?
The product is scalable. The solution is stable.
What is your experience regarding pricing and costs for Graylog?
I am not familiar with the pricing details of Graylog, as I was not responsible for that aspect. It was determined th...
What needs improvement with Graylog?
An improvement I would suggest is in Graylog's user interface, such as allowing for font size adjustments. A potentia...
What are the biggest differences between Securonix UEBA, Exabeam, and IBM QRadar?
It mostly depends on your use-cases and environment. Exabeam and Securonix have a stronger UEBA feature set, friendli...
What SOC product do you recommend?
For tools I’d recommend: -SIEM- LogRhythm -SOAR- Palo Alto XSOAR Doing commercial w/o both (or at least an XDR) is a...
What is your experience regarding pricing and costs for IBM Security QRadar?
When comparing with Splunk, IBM Security QRadar's cost is reasonable. Splunk is more expensive than IBM Security QRadar.
What is a better choice, Splunk or Azure Sentinel?
It would really depend on (1) which logs you need to ingest and (2) what are your use cases Splunk is easy for ingest...
How does Splunk compare with Azure Monitor?
Splunk handles a high amount of data very well. We use Splunk to capture information and as an aggregator for monitor...
What do you like most about Splunk?
There are a lot of third-party applications that can be installed.
 

Also Known As

Graylog2
IBM QRadar, QRadar SIEM, QRadar UBA, QRadar on Cloud, IBM QRadar Advisor with Watson
No data available
 

Overview

 

Sample Customers

Blue Cross Blue Shield, eBay, Cisco, LinkedIn, SAP, King.com, Twilio, Deutsche Presse-Agentur
Clients across multiple industries, such as energy, financial, retail, healthcare, government, communications, and education use QRadar.
Splunk has more than 7,000 customers spread across over 90 countries. These customers include Telenor, UniCredit, ideeli, McKenney's, Tesco, and SurveyMonkey.
Find out what your peers are saying about Wazuh, Splunk, Datadog and others in Log Management. Updated: August 2025.
866,685 professionals have used our research since 2012.