Graylog Enterprise vs Splunk Enterprise Security comparison

Graylog and Splunk are both solutions in the Log Management category. Graylog is ranked #15 with an average rating of 7.0, while Splunk is ranked #2 with an average rating of 8.3. Graylog holds a 5.0% mindshare in Log Management, compared to Splunk’s 7.1% mindshare. Additionally, 95% of Graylog users are willing to recommend the solution, compared to 94% of Splunk users who would recommend it.

Graylog Enterprise

Read 22 Graylog Enterprise reviews

7,882 Views
7,882 Comparison Views

95% willing to recommend

Splunk Enterprise Security

Read 374 Splunk Enterprise Security reviews

23,828 Views
13,105 Comparison Views

94% willing to recommend

Graylog Enterprise

Splunk Enterprise Security

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Executive SummaryUpdated on Dec 14, 2025

Splunk Enterprise Security and Graylog Enterprise compete in the log management and security information and event management (SIEM) markets. Based on data, Splunk might have the upper hand due to its scalability and broad integrations, while Graylog is noted for its open-source advantages and specific use case efficiency.

Features: Splunk Enterprise Security is renowned for its log management, comprehensive search via schema-on-read technology, and strong integration capabilities. It provides operational intelligence and flexibility in data handling, alongside enhanced visibility from diverse data sources. Graylog Enterprise features robust search functionalities and alerting capabilities, emphasizing its strength in managing data from various sources on an open-source platform.

Room for Improvement: Splunk Enterprise Security users seek improved visualizations and a more intuitive GUI, alongside better security administration controls. Enhancements in real-time intelligence and second-factor authentication are also desired. Graylog Enterprise needs a more user-friendly interface for complex environments and better documentation, along with increased integration capabilities for extended flexibility.

Ease of Deployment and Customer Service: Splunk Enterprise Security offers a variety of deployment options including public, private, hybrid clouds, and on-premises solutions, supported by a robust community. Users value the professional support and knowledge base, despite noted delays in response times. Graylog Enterprise, mostly deployed on-premises or in hybrid clouds, benefits from the simplicity of open-source availability, though lacks extensive support for resolving complex issues.

Pricing and ROI: Splunk Enterprise Security is perceived as high-cost, justified by its extensive features and performance in large enterprises, with substantial returns in security and operational efficiency. Graylog Enterprise appeals to budget-conscious users due to its open-source model, offering significant licensing cost savings but potentially requiring more development work for full-scale implementation.

To learn more, read our detailed Graylog Enterprise vs. Splunk Enterprise Security Report (Updated: December 2025).

Buyer's Guide

Graylog Enterprise vs. Splunk Enterprise Security

December 2025

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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:

Categories and Ranking

Graylog Enterprise

Ranking in Log Management

15th

Average Rating

8.0

Reviews Sentiment

6.1

Number of Reviews

Ranking in other categories

No ranking in other categories

Splunk Enterprise Security

Ranking in Log Management

2nd

Average Rating

8.4

Reviews Sentiment

7.3

Number of Reviews

374

Ranking in other categories

Security Information and Event Management (SIEM) (1st), IT Operations Analytics (1st)

Mindshare comparison

As of January 2026, in the Log Management category, the mindshare of Graylog Enterprise is 5.0%, down from 6.2% compared to the previous year. The mindshare of Splunk Enterprise Security is 7.1%, down from 8.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Log Management Market Share Distribution
Product	Market Share (%)
Splunk Enterprise Security	7.1%
Graylog Enterprise	5.0%
Other	87.9%

Log Management

Featured Reviews

reviewer2704128

Head of Cyber Security & CTO at a tech services company with 51-200 employees

Robust event correlation enhances operations, yet integration scope can broaden for seamless data handling

The features and capabilities of Graylog that we have found most valuable are related to its basis on open search, which was ElasticSearch. We appreciate being able to integrate custom feeds and do custom parsers, and to be able to do some of the correlation on it. That all works effectively. 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 use it for investigating problems and problem management. We throw all the information at it, we have it alerting for certain conditions, but generally we use it for deep diving into issues as needed.

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reviewer1469784

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.

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Quotes from Members

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

Pros

"Graylog's search functionality, alerting functionality, user management, and dashboards are useful."

"It has data adapters and lookup tables that utilize HTTP calls to APIs."

"The solution's most valuable feature is its new interface."

"Storing logs in Elasticsearch means log retrieval is extremely fast, and full text search is available by default."

"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."

"Message forwarding through the in-built module."

"Real-time UDP/GELF logging and full text-based searching."

"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."

More Graylog Enterprise pros

"We evaluated several solutions and selected Splunk due to the functionality and cost."

"When it comes to leveraging Splunk Enterprise Security's dashboards and visualizations to communicate security posture to executives, it's pretty straightforward for any type of information."

"My customer was integrated with many third-party credentials and other threat sources as well. The integration part was seamless and easy. The rates for allocating valuable information and IOCs from different sources are also good."

"The feature I appreciate the most about Splunk Enterprise Security is the CIM data model, which allows users to bring in data from different technologies, such as firewalls, endpoints, and perimeter DMZs, enabling every device to pump data into Splunk Enterprise Security, with the data model normalizing all the data and placing it in a common plane."

"Splunk incorporates a lot of elements that help to reduce security risks. For it to reach certain compliance, we need to have some security insight. Splunk is a very good SIEM, it’s a top solution, but the best feature is its cost of visibility. We have all the most important features to detect vulnerabilities or risks."

"The end-to-end visibility into our environment that Splunk provides is impressive. We just need to use it better."

"UBA, User Behavior Analytics, is a key feature."

"It can log more logs than other solutions. It's a good way to troubleshoot problems."

More Splunk Enterprise Security pros

Cons

"Graylog can improve the index rotation as it's quite a complex solution."

"Graylog needs to improve their authentication. Also, the fact that Graylog displays logs from the top down is just ridiculous."

"It would be great if Graylog could provide a better Python package in order to make it easier to use for the Python community."

"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."

"Dashboards, stream alerts and parsing could be improved."

"The area in Graylog that needs to be improved or enhanced would be the integrations."

"The biggest problem is the collector application, as we wanted to avoid using Graylog Collector Sidecar due to its architecture."

"Over six months, I had two similar issues where searches were performed on field "messages". It exhausted all the memory of the ES node causing an ES crash and a Graylog halt."

More Graylog Enterprise cons

"Being able to have a one-stop shop where you have the alert, but then you can generate the case right there from Splunk Enterprise Security instead of having to pivot to another tool such as Mission Control. You do not have to keep bouncing between them, so if you could do it all in one place, that would be great. The new release is supposed to start getting in that direction."

"Missing capability for audio/video and image processing."

"More training on PetaData using artificial intelligence techniques to identify the events which are not normal and exceptions that would help the organization identify threats and malware on the go with results."

"You can run a script from an event, but it needs many clicks to run that integration, which could be made easier."

"Being a SIEM solution with a centralized dashboard, we would like to have more options to customize it."

"The tool should include more real-world use case examples built out either through videos or in the community."

"Enterprise security: Splunk must work on clarifying the solution to customers and explain how to gain more from it."

"When files are absent, troubleshooting becomes difficult, and performance issues inevitably arise."

More Splunk Enterprise Security cons

Pricing and Cost Advice

"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."

"I am using a community edition. I have not looked at the enterprise offering from Graylog."

"We're using the Community edition."

"It's an open-source solution that can be used free of charge."

"We are using the free version of the product. However, the paid version is expensive."

"If you want something that works and do not have the money for Splunk or QRadar, take Graylog."

"Consider Enterprise support if you have atypical needs or setup requirements."

"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."

More Graylog Enterprise pricing and cost advice

"Pricing is pretty fair."

"The pricing model is expensive and a nightmare based on the amount of data."

"Splunk Enterprise Security is a worthwhile investment given the comprehensive range of features it offers."

"Splunk is a bit pricier, but the benefits and ROI are huge."

"Splunk Enterprise Security is expensive."

"The Splunk Enterprise Security license is expensive."

"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."

"The price of Splunk is too high for our market."

More Splunk Enterprise Security pricing and cost advice

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Comparison Review

Vinod Shankar

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…

Read full review

Top Industries

By visitors reading reviews

Computer Software Company

15%

Comms Service Provider

10%

University

Government

Financial Services Firm

13%

Computer Software Company

12%

Manufacturing Company

Government

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	9
Midsize Enterprise	5
Large Enterprise	8

By reviewers
Company Size	Count
Small Business	109
Midsize Enterprise	50
Large Enterprise	263

Questions from the Community

What do you like most about Graylog?

The product is scalable. The solution is stable.

See all answers

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 that we didn't need an enterprise plan, which is more suited for clients with less...

See all answers

What needs improvement with Graylog?

An improvement I would suggest is in Graylog's user interface, such as allowing for font size adjustments. A potential enhancement could be the integration with Ollama to run large language models ...

See all answers

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...

See all answers

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 ...

See all answers

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...

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Comparisons

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Compared 21% of the time

syslog-ng vs Graylog Enterprise

Compared 10% of the time

Security Onion vs Graylog Enterprise

Compared 6% of the time

LogRhythm SIEM vs Graylog Enterprise

Compared 2% of the time

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IBM Security QRadar vs Splunk Enterprise Security

Compared 9% of the time

Wazuh vs Splunk Enterprise Security

Compared 6% of the time

Dynatrace vs Splunk Enterprise Security

Compared 4% of the time

Datadog vs Splunk Enterprise Security

Compared 3% of the time

Sentinel vs Splunk Enterprise Security

Compared 3% of the time

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Product Reports

Buyer's Guide

Graylog Enterprise

December 2025

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Buyer's Guide

Splunk Enterprise Security

December 2025

Download Splunk Enterprise Security product report

Also Known As

Graylog2

No data available

Overview

Graylog Enterprise, recognized for log collection, real-time search, and enriched data handling, offers an open-source framework that integrates seamlessly with Elasticsearch. Its user-centric interface streamlines data correlation and log aggregation, supporting both backend services and comprehensive monitoring needs.

Graylog Enterprise stands out for its stability and powerful log management capabilities, facilitating efficient log aggregation, real-time updates, and data analytics. Users benefit from its plugin-based alerting, user-friendly interface, and support for microservices, including Docker integration. The ability to search in detail, flexible API integration, and data enrichment features are highly valued. Challenges include collector application issues, desired visualization enhancements, and authentication integration improvements. Users seek advancements in UI customization, backup functions, and easier rule creation.

What are Graylog Enterprise's most important features?

Log Collection: Efficiently aggregates and handles diverse logs.
Real-Time Search: Provides immediate log data access.
Custom Alerts: Plugin-based alerting for tailored notifications.
Dashboard Enhancements: Improved visualization for data insights.
Data Enrichment: Adds value through detailed log analysis.

What benefits and ROI can users expect?

Audit Trail Support: Essential for compliance in financial sectors.
Security Event Correlation: Enables incident analysis and response.
Faster Issue Identification: Speeds up troubleshooting with detailed visualization.
API Flexibility: Seamless integration across systems and environments.
Comprehensive Monitoring: Centralized log management enhances oversight.

In industrial use, Graylog Enterprise is crucial for audit trailing in financial sectors, facilitating security event identification and error monitoring. Backend teams leverage real-time analytics for swift issue resolution, while developers appreciate the comprehensive log visualization enabled by Docker integration for microservice management.

Graylog

Splunk Enterprise Security delivers powerful log management, rapid searches, and intuitive dashboards, enhancing real-time analytics and security measures. Its advanced machine learning and wide system compatibility streamline threat detection and incident response across diverse IT environments.

Splunk Enterprise Security stands out in security operations with robust features like comprehensive threat intelligence and seamless data integration. Its real-time analytics and customizable queries enable proactive threat analysis and efficient incident response. Integration with multiple third-party feeds allows detailed threat correlation and streamlined data visualization. Users find the intuitive UI and broad compatibility support efficient threat detection while reducing false positives. Despite its strengths, areas such as visualization capabilities and integration processes with cloud environments need enhancement. Users face a high learning curve, and improvements in automation, AI, documentation, and training are desired to maximize its potential.

What Are the Key Features of Splunk Enterprise Security?

Log Management: Efficiently manages and organizes a vast amount of logs for better data handling.
Rapid Data Search: Quickly retrieves relevant data for fast decision-making.
Flexible Dashboards: Customizable dashboards provide clear data visualization.
Comprehensive Threat Intelligence: Offers detailed insights to preemptively defend against threats.
Real-Time Analytics: Analyzes data in real-time to enhance response times.
Integration with Third-Party Feeds: Streamlines information flow from multiple sources.

What Benefits Should Users Investigate in Reviews?

Efficient Incident Response: Enhances the ability to respond promptly to threats.
False Positive Reduction: Minimizes incorrect threat alarms, making monitoring more efficient.
Threat Detection Speed: Accelerates the identification and evaluation of security threats.
Cost-Effectiveness: Potential savings through better licensing options and operational efficiency.
User Adaptability: Enhancements in documentation and training resources aid in overcoming the learning curve.

In specific industries like finance and healthcare, Splunk Enterprise Security is instrumental for log aggregation, SIEM functionalities, and compliance monitoring. Companies leverage its capabilities for proactive threat analysis and response, ensuring comprehensive security monitoring and integration with various tools for heightened operational intelligence.

Splunk

Sample Customers

Blue Cross Blue Shield, eBay, Cisco, LinkedIn, SAP, King.com, Twilio, Deutsche Presse-Agentur

Splunk has more than 7,000 customers spread across over 90 countries. These customers include Telenor, UniCredit, ideeli, McKenney's, Tesco, and SurveyMonkey.

Buyer's Guide

Graylog Enterprise vs. Splunk Enterprise Security

December 2025

Free Report: Graylog Enterprise vs. Splunk Enterprise Security

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