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Graylog Security vs Splunk Enterprise Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Apr 6, 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)
38th
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
7.6
Number of Reviews
313
Ranking in other categories
Log Management (2nd), IT Operations Analytics (1st)
 

Mindshare comparison

As of June 2025, in the Security Information and Event Management (SIEM) category, the mindshare of Graylog Security is 0.5%, up from 0.3% compared to the previous year. The mindshare of Splunk Enterprise Security is 9.5%, down from 12.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM)
 

Featured Reviews

Tony Zafiropoulos - PeerSpot reviewer
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.
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

"We use the solution to collect logs."
"The tool aggregates logs. We can see the logs in one place."
"It gives us good visibility into multiple environments, including cloud, on-premises, and hybrid; irrespective of platform."
"It scales better in the cloud than on-premise."
"Splunk Enterprise Security is amazing."
"It is lovely to have everything we need in one tool. Everything is quite centralized."
"Splunk is quite flexible for our customers. Splunk does not filter from a specific lock, you can define it later."
"Recently, Splunk upgraded to version 9.0.02, which includes excellent data dashboards and visualization effects."
"We used it to create a custom anomaly detection data model to monitor the activity of our back-end services on an hourly basis relative to the past three months of activity."
"I like the search feature and the indexing. It's very fast and comprehensive."
 

Cons

"Graylog Security needs to incorporate security scorecards."
"I want Splunk Enterprise Security to release more AI and machine learning features in the future."
"The upgrading process could be smoother."
"There is a learning curve in order to start using machine learning. We have been trying to do it for three years, and we have not managed anything. It is too complex."
"Certain sections of the developer documentation could use some updating and clarification."
"The difficult part is related to integration with sources of data that are used to create the logs as this depends on the infrastructure of the client."
"The initial setup is complex, but this is necessary. We needed to take into consideration how to direct log files from thousands of machines to Splunk, and how to ingest those files."
"Splunk could improve its default machine-learning models. Also, Splunk Enterprise's native threat intelligence isn't that good. I prefer a custom threat intelligence model."
"It's difficult to set up initially, and their billing model is also a bit complicated."
 

Pricing and Cost Advice

"I rate the tool's pricing a one out of ten."
"The price of this solution is expensive. However, it has great features. If you want a great solution you need to pay a price matching the features."
"It is expensive. That is why many customers have moved to IBM QRadar. The price is definitely a challenge for customers."
"Splunk is really expensive compared to all the other tools on the market, including Microsoft Sentinel."
"While licensing can be a concern, there are ways to reduce the licensing costs including filtering some events."
"Splunk Enterprise Security is not a cheap product, but I think it is worth every dollar that you pay."
"Pricing is pretty fair."
"I think the price could be improved."
"Splunk Enterprise Security is a bit expensive overall, but it provides good value."
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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
21%
Educational Organization
9%
Retailer
7%
Construction Company
7%
Computer Software Company
15%
Financial Services Firm
15%
Manufacturing Company
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

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: June 2025.
859,129 professionals have used our research since 2012.