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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 June 2025, in the Log Management category, the mindshare of Graylog is 6.7%, up from 5.9% compared to the previous year. The mindshare of IBM Security QRadar is 3.7%, down from 5.0% compared to the previous year. The mindshare of Splunk Enterprise Security is 7.3%, down from 10.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
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.
Md. Shahriar Hussain - PeerSpot reviewer
Real-time incident detection and user-friendly dashboard benefit daily operations
There are many types of AI, and this AI is very limited in SQL and features. There may be potential for improvement. So far, it seems very limited. It shows some good features in the correlation part, but I think there is room for improvement. For instance, when creating rules, it can suggest more rules, reducing the effort needed. If AI-related support can suggest rules and integrate with existing security devices like MD, IPS, this SIM can create more relevant rules. Sometimes logs I receive don't mean anything, and I need technical stakeholders to share or forward logs, but these are sometimes inadequate. Keywords can help identify insufficient logs. I often lack time to verify logs. Sharing false positive results could be reduced to help my team.
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

"Allowing us to set up alerts and integrate with platforms we already use, such as Slack and OpsGenie to alert users of these errors proactively, is also a very useful feature."
"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 run a containerized microservices environment. Being able to set up streams and search for errors and anomalies across hundreds of containers is why a log aggregation platform like Graylog is valuable to us."
"Real-time UDP/GELF logging and full text-based searching."
"Storing logs in Elasticsearch means log retrieval is extremely fast, and full text search is available by default."
"Everything stands out as valuable, including the fact that I can quantify and qualify the logs, create pipelines and process the logs in any way I like, and create charts or data maps."
"What I like about Graylog is that it's real-time and you have access to the raw data. So, you ingest it, and you have access to every message and every data item you ingest. You can then build analytics on top of that. You can look at the raw data, and you can do some volumetric estimations, such as how big traffic you have, how many messages of data of a type you have, etc."
"Graylog is valuable because it bridges technical knowledge to non-technical teams, presenting complex backend processes in a simple timeline."
"Vulnerability detection is the most valuable feature. It's the tool that finds the threats."
"I think the QDI is very good."
"It has improved comprehensive visibility for what is going on in the perimeters, and on the inside, as well."
"There are other third-party plugins that we can use."
"I like that it's easy to use and the performance is good."
"IBM QRadar Advisor with Watson is a stable solution."
"The most valuable features of IBM Security QRadar are flexibility, IBM support, and scalability."
"There are more than 120 extensions in QRadar, which are easy to install and configure. These can improve your analysis of events."
"It helps us uncover bottlenecks in the network."
"The most valuable features include the incident review and Dashboard Studio."
"It gives me notifications of notable events."
"The ability to manage large amounts of generated data and to protect all devices from unauthorized use are the most valuable features."
"Good for log collection and log management."
"The solution is stable and reliable."
"It has a big user base, so the community is useful."
"Splunk Enterprise Security quickly gives us a view of an endpoint or a user or identity. If I want to look for an identity or an asset, I just quickly go into Splunk Enterprise Security. I know where to go and get a quick analysis for a respective object."
 

Cons

"I would like to see a default dashboard widget that shows the topology of the clusters defined for the graylog install."
"With technical support, you are on your own without an enterprise license."
"The infrastructure cost is the main issue. I like the rest. If the infrastructure costs could be lower, it would be fantastic."
"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."
"Dashboards, stream alerts and parsing could be improved."
"The area in Graylog that needs to be improved or enhanced would be the integrations."
"Graylog can improve the index rotation as it's quite a complex solution."
"Lacks sufficient documentation."
"The product can be a bit complex."
"I would like to see some artificial intelligence and alternative solutions."
"The playbook guide which specifies the rules for security use cases needs to be provided to support in case the organization needs help."
"A lot of information that we receive for the devices is IP-based, but it would help if we could have a default dashboard in which we can add more details about the assets for which we are receiving the information. For example, if it is a Windows or Linux device, we only get the IP for that particular device. We don't really get the name and other details of that particular device. For that, you have to drill down into your own asset management system. It would be good to have a place where we can probably add this information so that we don't have to look into other tools."
"There are reports that I would like to generate that are either not included, or I cannot find."
"The dashboard is pathetic and it takes a long time to perform a search."
"In terms of what could be improved, I would say the script which we have to create for custom actions. QRadar needs to improve that feature. Additionally, QRadar has to provide the playbooks designing features."
"We would like to see better instrumentation for debugging changes in the log flow."
"Most importantly, Splunk can be outrageously expensive. That is the problem with both Splunk and Sentinel. Their pricing literally explodes based on the amount of data you feed in."
"The integration could be a bit better. They charge for certain integrations."
"Its interface and usability can always be improved."
"We find that the maintenance process could be a lot better."
"DMC should be a little more intuitive with better dashboarding. Seeing the cause of data flow can be tough to track down."
"It is important to make sure that everything is built off of the threat models and all the underlying items within Splunk."
"The GUI can be improved to include some of the capabilities that other BI solutions have."
"There can be a bit of complexity around some fields during the initial setup."
 

Pricing and Cost Advice

"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."
"I am using a community edition. I have not looked at the enterprise offering from Graylog."
"There is an open source version and an enterprise version. I wouldn't recommend the enterprise version, but as an open source solution, it is solid and works really well."
"It's an open-source solution that can be used free of charge."
"Having paid official support is wise for projects."
"Graylog is a free open-source solution. The free version has a capacity limitation of 2 GB daily, if you want to go above this you have to purchase a license."
"If you want something that works and do not have the money for Splunk or QRadar, take Graylog.​​"
"I use the free version of Graylog."
"I feel that the price is reasonable but compared to other products that are on the market, such as an offering by Microsoft, it is more expensive."
"IBM QRadar is a little bit expensive compared to other products."
"In terms of additional costs, it depends on the subscription that you choose. There are plenty of options to choose from."
"The pricing is good."
"The pricing is higher but cheaper than others and there are no additional costs."
"The price of this solution is a little bit expensive, so if it were cheaper then it would help."
"We pay approximately $40,000 to use the solution annually. This solution is a lot less expensive than Splunk."
"It's not expensive for the resources that it gives you."
"The price of Splunk Enterprise Security is reasonable, falling somewhere in the middle range."
"It's more expensive than the other tools, but it's worth it. Every penny is worth it."
"It can be cost-prohibitive when you start to scale and have terabytes of data. Its cost model is based on how much data it processes a day. If they're able to create scaled-down niche or custom package offerings, it may help with the cost. Instead of the full-blown features, if they can narrow the scope where it can only be used for a specific purpose, it would kind of create that market for the product, and it may help with the costing. When you start using it as a central aggregator and you're pumping tons of logs at it, pretty soon, you'll start hitting your cap on what it can process a day. Once you've got that, you're kind of defeating the purpose because you're going to have to scale back."
"Most people share the same thought that the ingestion rates can get pretty pricey. There is a lot of work we do to curate the data that we send to Splunk so that it is not too noisy or too expensive."
"There is an annual license required to use this solution."
"I believe there is room for improvement in reducing costs, particularly in the financial aspect, as Splunk tends to be pricier compared to other options."
"Splunk licensing model might seem expensive but with all the gain in functionalities you will have compared to traditional SIEM solutions I think it’s worth the price."
"While licensing can be a concern, there are ways to reduce the licensing costs including filtering some events."
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Comparison Review

VS
Feb 26, 2015
HP ArcSight vs. IBM QRadar vs. ​McAfee Nitro vs. Splunk vs. RSA Security vs. LogRhythm
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
18%
Comms Service Provider
10%
Educational Organization
7%
Government
7%
Educational Organization
16%
Computer Software Company
15%
Financial Services Firm
10%
Government
6%
Financial Services Firm
15%
Computer Software Company
15%
Manufacturing Company
8%
Government
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

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 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: May 2025.
854,338 professionals have used our research since 2012.