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Graylog Security vs Splunk Enterprise Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Oct 19, 2025

Review summaries and opinions

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

Categories and Ranking

Graylog Security
Ranking in Security Information and Event Management (SIEM)
39th
Average Rating
8.6
Reviews Sentiment
7.5
Number of Reviews
2
Ranking in other categories
No ranking in other categories
Splunk Enterprise Security
Ranking in Security Information and Event Management (SIEM)
1st
Average Rating
8.4
Reviews Sentiment
7.3
Number of Reviews
374
Ranking in other categories
Log Management (2nd), IT Operations Analytics (1st)
 

Mindshare comparison

As of December 2025, in the Security Information and Event Management (SIEM) category, the mindshare of Graylog Security is 0.6%, up from 0.5% compared to the previous year. The mindshare of Splunk Enterprise Security is 8.0%, down from 10.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Market Share Distribution
ProductMarket Share (%)
Splunk Enterprise Security8.0%
Graylog Security0.6%
Other91.4%
Security Information and Event Management (SIEM)
 

Featured Reviews

Tony Zafiropoulos - PeerSpot reviewer
Owner/ Chief Engineer at Fixvirus.com
Aggregates logs in one place and helps to review data points
We tried Graylog Security, starting with their inexpensive open-source version. We tested it out and continued using it for a while. As for the main differences between Graylog Security and other vendors, some users might prefer cloud-based platforms over on-premises solutions. It isn't inherently cloud-native, but that might not matter much for some.
reviewer1469784 - PeerSpot reviewer
Senior Manager at a financial services firm with 10,001+ employees
Helps us detect cyber threats quickly and integrate multiple feeds effectively
Overall, the product is good, but when it comes to some infrastructure issues, we have to dig into more logs. There is no straightforward indication of an issue. Health check kind of dashboards are not available. More AI would help us, and more optimization, since security products run more queries. The AI module could suggest solutions, optimizing queries or workload balancing. If the product itself advises on running queries during peak times, it would be similar to what ChatGPT currently offers. We see quite a few issues on stability. Even last week, we faced something, and identifying bottlenecks is not easy. We need more SMEs, and there is no mechanism to tell us about indexer or search head issues. Self-monitoring dashboards could be beneficial. The technical support still requires more improvement. Often, primary support takes a lot of time and forwards most solutions to the engineering side. The primary support team has very limited knowledge to provide.

Quotes from Members

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

Pros

"We use the solution to collect logs."
"The tool aggregates logs. We can see the logs in one place."
"The integration and plugin availability are nice, and the AI module is also great."
"The additional vendors we've brought on board, particularly the elastic, have been quite beneficial."
"Splunk Enterprise Security is a valuable tool that allows us to monitor data from the APS daily."
"Splunk Enterprise Security has helped improve my organization's business resilience, as we were able to detect an attack that was happening after hours and prevent it thanks to the detections."
"We have created a few custom use cases for Splunk that have helped us detect threats faster. For example, we set up endpoint-related data models and specialized setups for various scenarios. It's more efficient than some other products I've used."
"The search engine and indexes are fast and optimized, and the report generation dashboard is user-friendly."
"The ability to ingest different log types from many different products in our environment is most valuable."
"The correlation capabilities are the first value that our clients say they like with Splunk."
 

Cons

"Graylog Security needs to incorporate security scorecards."
"Deployment is not difficult but the lock sources and configurations can take time."
"Splunk isn't appropriate for smaller companies. It's too expensive."
"The cluster environment should be improved. We have a cluster. In the Splunk cluster environment, in the case of heavy searches and heavy load, the Splunk cluster goes down, and we have to put it in the maintenance mode to get it back. We are not able to find the actual culprit for this issue. I know that cluster has RF and SF, but it has been down so many times. There should be something in Splunk to help users to find the reason and the solution for such issues."
"An area of improvement would be the licensing of the solution. They need a free license, which would allow faster lead times."
"We are planning to do certifications, and there are many features, such as risk-based score and score detection, where the current training doesn't provide visibility to the analyst. They should offer training based on the features we use."
"You can run a script from an event, but it needs many clicks to run that integration, which could be made easier."
"I'd love to see more integrations, which is one of the primary points of the key node with Splunk Enterprise Security."
"I have concerns about the architecture as well since I can see it is not very well defined."
 

Pricing and Cost Advice

"I rate the tool's pricing a one out of ten."
"Splunk is definitely not a cheap solution. It is an expensive product."
"It's definitely worth it."
"Further reductions would be fantastic, and I believe that more and more people would flock to it."
"It is not cheap."
"It can be tough to determine if you are getting all of the value out of your investment at times."
"The solution is a little expensive."
"My customers have found the price of the solution to be high."
"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."
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Comparison Review

VS
Manager, Enterprise Risk Consulting at a tech company with 1,001-5,000 employees
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
16%
Educational Organization
10%
Retailer
8%
Financial Services Firm
6%
Financial Services Firm
13%
Computer Software Company
12%
Manufacturing Company
9%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business109
Midsize Enterprise50
Large Enterprise263
 

Questions from the Community

What do you like most about Graylog Security?
The tool aggregates logs. We can see the logs in one place.
What needs improvement with Graylog Security?
Graylog Security needs to incorporate security scorecards.
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 asking to miss details that are critical, and ending up a statistic. Also, rememb...
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 ingestion of anything, but the charge per GB/Day Indexed and it gets expensive as log ...
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 monitoring information from different sources. Splunk is very good at alerting us if we...
 

Overview

 

Sample Customers

Information Not Available
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 Graylog Security vs. Splunk Enterprise Security and other solutions. Updated: December 2025.
879,310 professionals have used our research since 2012.