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Graylog vs Splunk Enterprise Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jan 5, 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
Ranking in Log Management
16th
Average Rating
8.0
Reviews Sentiment
6.7
Number of Reviews
19
Ranking in other categories
No ranking in other categories
Splunk Enterprise Security
Ranking in Log Management
1st
Average Rating
8.4
Reviews Sentiment
7.6
Number of Reviews
303
Ranking in other categories
Security Information and Event Management (SIEM) (1st), IT Operations Analytics (1st)
 

Mindshare comparison

As of February 2025, in the Log Management category, the mindshare of Graylog is 6.2%, up from 5.6% compared to the previous year. The mindshare of Splunk Enterprise Security is 7.8%, down from 12.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Log Management
 

Featured Reviews

Andrey Mostovykh - PeerSpot reviewer
Real-time analysis, easy setup, and open source
We stopped using it for analytics because of its price, and at the moment, we are using it mostly for log centralization. If you use it with high traffic for analytical purposes, as well as for the logs, the infrastructure costs are unbelievable. Graylog is a great product backed by Elasticsearch as the storage and query engine. It is just an interface on top of Elasticsearch and some Elasticsearch management. The indexes that are kept in Elasticsearch are managed by Graylog software. Elasticsearch is a decent product, but it's very infrastructure-heavy. It requires lots of resources, and if you make a mistake with provisioning, you are likely to not get a cluster back. We had a couple of outages like that, and we hated that. So, we ended up over-provisioning resources just to avoid such situations from happening. If you have a whole team trying to fix the Graylog instance for two days, that's a bit too much. That may be my Norwegian take on it, but the engineering resources are expensive. It's better to just provision the infrastructure. Overall, the product is great, and the features are just fine, but the infrastructure cost is what is killing it. The infrastructure cost is the main issue. I like the rest. If the infrastructure costs could be lower, it would be fantastic. I'm not sure if they can improve the infrastructure cost with the way Elasticsearch is. If they keep using Elasticsearch, maybe there are some opportunities there, or they can support other backends with cheaper storage. They could have a different backend to replace Elasticsearch or do some tweaks to Elasticsearch to reduce the costs. There could be partial parsing of logs or parsing on demand so that when you write data through Graylog to Elasticsearch, it doesn't need to crunch in every detail requiring that much CPU.
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

"Open source and user friendly."
"This had increased productivity for the dev and support teams, because we are directly notifying them."
"I am very proud of how very stable the solution is."
"Graylog is very handy."
"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."
"Storing logs in Elasticsearch means log retrieval is extremely fast, and full text search is available by default."
"Real-time UDP/GELF logging and full text-based searching."
"The ability to write custom alerts is key to information security and compliance."
"Splunk is quite flexible for our customers. Splunk does not filter from a specific lock, you can define it later."
"Splunk has significantly reduced the time in performing the task of aggregating logs, reviewing as well as time spent during investigations."
"There are a lot of third-party applications that can be installed."
"The compatibility with the add-ons helps us add more data in the same compatible format and use data models to elaborate and make it faster."
"The site is constantly up, and it's been really easy to adjust the data."
"The dashboard is amazing. Out-of-the-box dashboard is very good. It is very user-friendly."
"We saw the granularity that we could get from Splunk far exceeded what we already had. We had the ability to have our security team really focus on the platform and stay within the platform, but they could correlate with a variety of other stakeholders, and our stakeholders were growing."
"Being able to track impossible travel logins and things of that nature is valuable. We can track user logins from various IPs, various countries, and at various times to see if everything adds up."
 

Cons

"Graylog could improve the process of creating rules. We have to create them manually by doing parses and applying them. Other SIEM solutions have basic rules and you can create and get more events of interest."
"Since container orchestration systems are popular and Graylog fits the niche well, perhaps they could officially support running in docker containers on Kubernetes as a StatefulSet as a use case. That way, the declarative nature of Kubernetes config files would document their best case deployment scenario-"
"I would like to see a default dashboard widget that shows the topology of the clusters defined for the graylog install."
"Graylog can improve the index rotation as it's quite a complex solution."
"I would like to see some kind of visualization included in Graylog."
"There should be some user groups and an auto sign-in feature.​"
"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."
"More complex visualizations and the ability to execute custom Elasticsearch queries would be great."
"The biggest problem is data compression. Splunk is an outstanding product, but it is a resource hog. There should be better data compression for being able to maintain our data repositories. We end up having to buy lots of additional storage just to house our Splunk data. This is my only complaint about it."
"Queries are not always as easy or straightforward as they might be, so it can be difficult to figure out what you need to look for."
"We had an instance when Splunk failed and it took us a couple of days to recover."
"The integration with all our tool sets felt like we were reinventing the wheel, which was a pain point for us."
"Certain sections of the developer documentation could use some updating and clarification."
"The threat management part is still lagging. There are some gaps in threat management. Other vendors have built-in threat management systems, but Splunk lacks the threat management component in its portal. The UEBA and everything else is perfect, but it lacks a unified threat intelligence and management part."
"I would like to see more SIEM functionality and a better ticket tool."
"The integration could be a bit better. They charge for certain integrations."
 

Pricing and Cost Advice

"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."
"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."
"If you want something that works and do not have the money for Splunk or QRadar, take Graylog.​​"
"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."
"Consider Enterprise support if you have atypical needs or setup requirements.​"
"It's an open-source solution that can be used free of charge."
"As a team, we prefer the old pricing model with a perpetual license. We are still evaluating the whole subscription-based model."
"Truly evaluate the data you want to ingest and go slow. Pulling in data that can provide no use to your mission only wastes data against your license."
"While Splunk is more expensive than other solutions, we would still choose it because of its capabilities."
"Splunk Enterprise Security's pricing is pretty competitive."
"Our ROI is high."
"Free Splunk license for PoCs on personal machines and the ability to scale the PoC to an enterprise level app."
"We have an unlimited one, and we pay yearly, but I don't know how much it costs. Previously, I worked for a startup, and when they started building it up, it was complicated for them because they didn't have the budget for that many licenses. It was very costly for them. So, startups might find it a little bit problematic because of the licensing, but for bigger companies, there is no issue."
"I remember Splunk being relatively affordable. Kibana was more reasonable, but you get more with Splunk. If I was suggesting something, I would probably suggest Splunk because it is better to pay a little bit more and get a lot more."
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Comparison Review

VS
Feb 26, 2015
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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
17%
Comms Service Provider
10%
Government
8%
Educational Organization
7%
Financial Services Firm
15%
Computer Software Company
14%
Manufacturing Company
9%
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?
We are using the free version of the product. However, the paid version is expensive.
What needs improvement with Graylog?
Since it's a free tool, I don't have much to say. Troubleshooting is important to me. The initial setup is complex. I hope to see improvements in Graylog for more interactivity, user-friendliness, ...
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...
 

Also Known As

Graylog2
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.
Find out what your peers are saying about Graylog vs. Splunk Enterprise Security and other solutions. Updated: January 2025.
832,340 professionals have used our research since 2012.