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Graylog Enterprise vs Splunk Enterprise Security vs Sumo Logic 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 October 2025, in the Log Management category, the mindshare of Graylog Enterprise is 6.0%, up from 6.1% compared to the previous year. The mindshare of Splunk Enterprise Security is 7.7%, down from 9.1% compared to the previous year. The mindshare of Sumo Logic Security is 0.6%, up from 0.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Log Management Market Share Distribution
ProductMarket Share (%)
Splunk Enterprise Security7.7%
Graylog Enterprise6.0%
Sumo Logic Security0.6%
Other85.7%
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.
Kyle Vernham - PeerSpot reviewer
Built-in searches and unified data access streamline alert investigation and boosts analyst efficiency
The two features I appreciate the most in Splunk Enterprise Security are the built-in searches, which have been very easy for us to get started with right out of the box, and the fact that it accesses all of our other systems. You can access it as a pane of glass rather than having to search individually. We also have the option to compare our analysts from our service to service. Splunk Enterprise Security helps our SOC team prioritize and investigate high-fidelity alerts more effectively by providing a more in-depth look and the ability to access a lot more of our data. Instead of jumping from several segmented systems, it allows us to have everything brought together in one place. For example, you have to move from our purview to our build system and to Splunk Enterprise Security, and it enables us to streamline that process. The built-in features of Splunk Enterprise Security, which we recently procured, have given us a good starting point and demonstrated the value of the product, providing an easy way to sell it to our company. The ease of getting everything into our purview helps us, and it serves as a good start for the investigation part in one location rather than what we usually have, which is jumping from system to system to system. Splunk Enterprise Security plays a role in our company's strategy to combat insider threats and advanced persistent threats by currently being in its technical test phase. We are still rolling it out, and it should help us find any insider threats based on information that our policy states should not be present in our system. Splunk Enterprise Security's risk-based alerting (RBA) has impacted our alert volume and analyst productivity because we've got many different systems feeding into it. However, it has helped to make it easier for our analysts to go through a set of events rather than 100 alerts. RBA allows us to streamline the process and customize it for our analysts. 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. The visualization is easy to understand, but I haven't had any direct conversations with our executives.
Vinay Patel D N - PeerSpot reviewer
Effective with good log analytics but needs better rule correlation
The correlation rules and log mapping are not as mature compared to other SIM tools like Splunk. Sometimes logs will not fetch, and there are issues if the log volume exceeds a threshold. Not every tool is integrated with Sumo Logic. The response time for their support could be better, and it is not very user-friendly.

Quotes from Members

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

Pros

"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 very handy."
"The best feature of Graylog is the Elasticsearch integration. We can integrate and we can run filters, such as an event of interest, and those logs we can send to any SIEM tool or as an analytic. Additionally, there are clear and well-documented implementation instructions on their website to follow if needed."
"UDP is a fast and lightweight protocol, perfect for sending large volumes of logs with minimal overhead."
"I am very proud of how very stable the solution is."
"Real-time UDP/GELF logging and full text-based searching."
"The product is scalable. The solution is stable."
"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."
"Its huge, versatile AppBase helped me to configure and bring data from different sources to a unified platform."
"The initial setup is really straightforward. It's one of the easiest installations."
"We are using Microsoft 365 and we're using the Exchange Mail Service. It's good for monitoring that in particular."
"Scalability-wise, the tool is awesome since you can add or reduce your resources in an easy way."
"The features of Splunk Enterprise Security that I appreciate the most are its flexibility and scalability, as it integrates disparate security solutions, offers many out-of-the-box apps through Splunkbase, enables straightforward customization, and supports efficient detection and alerting processes that improve overall business resilience."
"It has supported our SOC by improving it."
"Splunk has facilitated the correlation of information security logs to look for incidents which could cause damage to the company's infrastructure, as well as financial losses from leaks."
"Integrity with many vendors: This simplifies the implementation and integration with different devices"
"Sumo Logic Security is a good solution for searching the logs and identifying the issues."
"We have used it many times to find a root cause of a live issue, then fix the problem in the applications."
"The most valuable features of Sumo Logic Security are the rules, use cases, and ease of use. Additionally, the integration is straightforward and good GUI."
"It provides easy visibility. I also like the shareable queries because we share a lot across groups."
"The Log Analytics platform is the most effective. If we cannot find the data in other tools, like email security or NDR, we can fetch those logs in the Log Analytics platform of Sumo Logic."
"Technical support is always great."
"The solution is quite stable."
"For many of our services, we use Sumo Logic to track errors and send notifications to our Slack channel, if there are issues. Then, we have our support people monitoring this, and they can react quickly."
 

Cons

"More complex visualizations and the ability to execute custom Elasticsearch queries would be great."
"With technical support, you are on your own without an enterprise license."
"The biggest problem is the collector application, as we wanted to avoid using Graylog Collector Sidecar due to its architecture."
"Dashboards, stream alerts and parsing could be improved."
"There should be some user groups and an auto sign-in feature.​"
"I hope to see improvements in Graylog for more interactivity, user-friendliness, and creating alerts. The initial setup is complex."
"The area in Graylog that needs to be improved or enhanced would be the integrations."
"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."
"There is another new term called benign positives. It is better to clearly identify each definition of those terms since it has not been popular in the industry, and everyone needs to be aware of those things."
"Make it easier to include roles and user controls, as it is horrible now."
"I would like to see more SIEM functionality and a better ticket tool."
"This solution could be improved by better pricing in general and by easier installation."
"The most significant challenges I face when using Splunk Enterprise Security for advanced threat detection include not having enough time to be in it, the resources and people to also be in there, and trying to configure it and teach people how to use it. A lack of resources prevents us from giving it the attention it needs."
"Splunk Enterprise Security can provide more details and help CISOs resolve vulnerability situations better. The reason is that the tools we choose for data analysis and log collection cannot collect all the data and logs. Splunk Enterprise Security should help me with this, but it cannot."
"Splunk Enterprise Security could be cheaper."
"Its interface and usability can always be improved."
"The API integration in Sumo Logic Security could improve. There are delayed connections or they stop and then automatically start. Having a seamless log collection would be beneficial."
"I would like to see improvement in the user experience when configuring things, ingesting logs, and creating ports."
"In my opinion, this solution has a steep learning curve and requires practice if users to be able to use this tool very efficiently."
"It would be nice to have an improved ability to scroll through logs within a time frame. Right now, we can search for specific errors. However, if we want to look for "before and after" within a specific time frame, it's not easy using the tool. This would be an improvement."
"The initial setup is the most stressful, like learning how to use it."
"We would like the ability to drill down into a dashboard and get into deeper levels."
"The correlation rules and log mapping are not as mature compared to other SIM tools like Splunk."
"The integration with multiple sources could be better."
 

Pricing and Cost Advice

"It's an open-source solution that can be used free of charge."
"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."
"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 use the free version of 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."
"Consider Enterprise support if you have atypical needs or setup requirements.​"
"​You get a lot out-of-the-box with the non-enterprise version, so give it a try first."
"The cost is on the high end, which makes it difficult for some organizations to use."
"Splunk Enterprise Security's pricing is competitive."
"Splunk Enterprise Security is a worthwhile investment given the comprehensive range of features it offers."
"In terms of pricing, I believe Splunk is unreasonably costly for the majority of mid and small-sized companies."
"The Splunk Enterprise Security license is expensive."
"Splunk's cost is very high. They need to review the pricing. They have to go back and totally readdress the market."
"It is expensive. I used to buy it early on, but then they combined it into a higher-up organization. They buy it for multiple systems now. Last time, I paid around 60K for it. There is just the licensing fee. That's all."
"The pricing is based on the volume of data fed into it, which can lead to substantial costs. This pricing model is complex and unpredictable, making cost management difficult."
"Purchasing the solution through the AWS Marketplace is very easy."
"If we went to ELK Stack, which is open source, it would have been less costly, but it would have required more development from our side."
"The license pricing model is based on the events that are processed through the solution."
"We chose to go through the AWS Marketplace because it makes it a lot easier when we bill our customers. Rather than having to get multiple different sources of information then correlate a monthly bill for our customers, it is just included in the AWS usage charges."
"Purchasing Sumo Logic through the AWS Marketplace was a simple step."
"The AWS Marketplace pricing is borderline. Every annual renewal, we always contemplate if we are getting what we think we could out of it or could we do it cheaper with some other product."
"The pricing is a little high, but for the features that we receive from Sumo Logic, it suits the price. For some small organizations, the price might be a little high."
"Pricing has been cheaper than some of the competing tools, like Splunk."
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Comparison Review

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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%
Comms Service Provider
10%
University
8%
Government
8%
Computer Software Company
14%
Financial Services Firm
14%
Manufacturing Company
8%
Government
7%
Computer Software Company
13%
Manufacturing Company
11%
Financial Services Firm
7%
Educational Organization
6%
 

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 Business110
Midsize Enterprise50
Large Enterprise257
By reviewers
Company SizeCount
Small Business6
Midsize Enterprise3
Large Enterprise12
 

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 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 Sumo Logic Security?
Sumo Logic Security is a good solution for searching the logs and identifying the issues.
What is your experience regarding pricing and costs for Sumo Logic Security?
The pricing structure for Sumo Logic Security is based on two elements: data storage and the number of scans. This ma...
What needs improvement with Sumo Logic Security?
In terms of improvement, feedback indicates there is a need for a local data center in my country. This is crucial to...
 

Also Known As

Graylog2
No data available
No data available
 

Overview

 

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.
Information Not Available
Find out what your peers are saying about Wazuh, Splunk, Grafana Labs and others in Log Management. Updated: October 2025.
869,760 professionals have used our research since 2012.