Try our new research platform with insights from 80,000+ expert users

Elastic Search vs Splunk Enterprise Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Apr 27, 2025

Review summaries and opinions

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

ROI

Sentiment score
6.4
Elastic Search offers high ROI, efficiency, and cost-effectiveness, with significant time-saving and security benefits despite some licensing costs.
Sentiment score
7.2
Splunk Enterprise Security enhances visibility, integration, and efficiency, streamlining operations and reducing costs, providing substantial returns for organizations.
We have not purchased any licensed products, and our use of Elastic Search is purely open-source, contributing positively to our ROI.
It is stable, and we do not encounter critical issues like server downtime, which could result in data loss.
The main benefits observed from using Elastic Search include improvements in operational efficiency, along with cost, time, and resource savings.
I have noticed a return on investment with Splunk Enterprise Security, as it delivers substantial value for money.
Customers see the value in investing in this solution, particularly when it helps resolve issues quickly, turning a potential 20-hour response into one hour.
We are able to secure the environment from all security threats and maintain an environment that is free from threats and attacks, especially cyberattacks.
 

Customer Service

Sentiment score
6.5
Elastic Search's customer service is praised for responsiveness and knowledge, but complex issue support may require improvement.
Sentiment score
6.7
Splunk Enterprise Security support is knowledgeable, but response times vary; experienced engineers and licensed users report better outcomes.
I would rate technical support from Elastic Search as three out of ten.
If you want to write your own correlation rules, it is very difficult to do, and you need Splunk's support to write new correlation rules for the SIEM tool.
They try to close issues as soon as possible, often just offering documentation links.
They are responsive and effectively resolve issues.
 

Scalability Issues

Sentiment score
7.3
Elastic Search is scalable and integrates well, but challenges exist with large datasets and disaster recovery under rapid scaling.
Sentiment score
7.7
Splunk Enterprise Security excels in scalability and flexibility for data, despite potential cost increases with larger usage.
I would rate its scalability a ten.
I can actually add more storage and memory because I host it in the cloud.
I would rate the scalability of Elasticsearch as an eight.
They struggle a bit with pure virtual environments, but in terms of how much they can handle, it is pretty good.
It is easy to scale.
It's big in a Central European context, and small from a Splunk North American context.
 

Stability Issues

Sentiment score
7.7
Elastic Search is stable and reliable, though version updates and data management can affect performance under stress.
Sentiment score
7.9
Splunk Enterprise Security is praised for its stability and resilience, though occasional issues occur with complex queries or updates.
The data transfer sometimes exceeded the bandwidth limits without proper notification, which caused issues.
The stability of Elasticsearch was very high.
They test it very thoroughly before release, and our customers have Splunk running for months without issues.
It provides a stable environment but needs to integrate with ITSM platforms to achieve better visibility.
It is very stable.
 

Room For Improvement

Elastic Search needs improvements in security, scalability, usability, stability, integration, support, and enhanced features for a better user experience.
Enhancements in UI, integration, support, and advanced features could improve Splunk Enterprise Security's usability, efficiency, and cost-effectiveness.
This can create problems for new developers because they have to quickly switch to another version.
It is primarily based on Unix or Linux-based operating systems and cannot be easily configured in Windows systems.
The consistency and stability of Elasticsearch are commendable, and they should keep up the good work.
Improving the infrastructure behind Splunk Enterprise Security is vital—enhanced cores, CPUs, and memory should be prioritized to support better processing power.
Splunk Enterprise Security is not something that automatically picks things; you have to set up use cases, update data models, and link the right use cases to the right data models for those detections to happen.
For any future enhancements or features, such as MLTK and SOAR platform integration, we need more visibility, training, and certification for the skilled professionals who are working.
 

Setup Cost

Elastic Search's free open-source version can incur back-end costs for advanced features, expertise, and premium support.
Splunk Enterprise Security, despite high costs, is favored by large enterprises for its comprehensive features and robust capabilities.
We used the open-source version of Elasticsearch, which was free.
I saw clients spend two million dollars a year just feeding data into the Splunk solution.
The platform requires significant financial investment and resources, making it expensive despite its comprehensive features.
Splunk is priced higher than other solutions.
 

Valuable Features

Elastic Search is valued for scalability, fast indexing, powerful analysis, security features, cloud readiness, and strong community support.
Splunk Enterprise Security enhances threat detection and incident response with advanced data analysis and integration from diverse sources.
Elastic Search makes handling large data volumes efficient and supports complex search operations.
The most valuable feature of Elasticsearch was the quick search capability, allowing us to search by any criteria needed.
Aggregation is faster than querying directly from a database, like Postgres or Vertica.
This capability is useful for performance monitoring and issue identification.
I assess Splunk Enterprise Security's insider threat detection capabilities for helping to find unknown threats and anomalous user behavior as great.
Splunk Enterprise Security provides the foundation for unified threat detection, investigation, and response, enabling fast identification of critical issues.
 

Categories and Ranking

Elastic Search
Average Rating
8.2
Reviews Sentiment
6.8
Number of Reviews
71
Ranking in other categories
Indexing and Search (1st), Cloud Data Integration (9th), Search as a Service (1st), Vector Databases (3rd)
Splunk Enterprise Security
Average Rating
8.4
Reviews Sentiment
7.6
Number of Reviews
312
Ranking in other categories
Log Management (2nd), Security Information and Event Management (SIEM) (1st), IT Operations Analytics (1st)
 

Mindshare comparison

Elastic Search and Splunk Enterprise Security aren’t in the same category and serve different purposes. Elastic Search is designed for Indexing and Search and holds a mindshare of 23.7%, down 27.2% compared to last year.
Splunk Enterprise Security, on the other hand, focuses on Security Information and Event Management (SIEM), holds 9.5% mindshare, down 12.4% since last year.
Indexing and Search
Security Information and Event Management (SIEM)
 

Q&A Highlights

VV
Nov 13, 2019
 

Featured Reviews

Anand_Kumar - PeerSpot reviewer
Captures data from all other sources and becomes a MOM aka monitoring of monitors
Scalability and ROI are the areas they have to improve. Their license terms are based on the number of cores. If you increase the number of cores, it becomes very difficult to manage at a large scale. For example, if I have a $3 million project, I won't sell it because if we're dealing with a 10 TB or 50 TB system, there are a lot of systems and applications to monitor, and I have to make an MOM (Mean of Max) for everything. This is because of the cost impact. Also, when you have horizontal scaling, it's like a multi-story building with only one elevator. You have to run around, and it's not efficient. Even the smallest task becomes difficult. That's the problem with horizontal scaling. They need to improve this because if they increase the cores and adjust the licensing accordingly, it would make more sense.
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.
report
Use our free recommendation engine to learn which Indexing and Search solutions are best for your needs.
856,873 professionals have used our research since 2012.
 

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…
 

Answers from the Community

VV
Nov 13, 2019
Nov 13, 2019
First of all, we need to understand what those two softwares are; Splunk is a finished SIEM that is mainly used to analyze data, such as logs, net flows, etc. Splunk comes in different flavors, below I will include a link of all the products they have. https://www.splunk.com/en_us/software.html Some of them can be even downloaded or you can try them in the cloud, below I will give you a link ...
2 out of 4 answers
NF
Nov 11, 2019
We use ELK or other freeware stacks in isolated small scenarios. Think of a small or medium company with a „midsized“ webshop. You can easily do your Log management with an ELK-Stack, let's say size 5 up to 10 GB, no Problem. Please keep in mind to order Hardware. The best thing on ELK is that you can start immediately you don't have to wait for licensing and it's easy to build the first small things. Another Example: Your Marketing Dep. wants to do some singular evaluations and very specialized marketing stuff. It is temporary and they don't have the budget for licensing. The results are not for permanent use. Just use ELK. In my opinion, ELK is only cost-effective if you don't need to buy their professional service. You must leave the cases small. If you are looking for bigger scenarios or you want to build-up a SIEM, SOC or even doing elevated things like SOAR it is a very different kind of thing. There can be account issues that a developer usually won't mind at the first glance but a Controller will. You have to look at the Total Cost of Ownership, Scalability, Time to Market, Secureness of future development, maintenance e.g. If you want to build up a complex scenario with the secureness of scalability you should go with SPLUNK. If tomorrow there is a better tool with lower costs and less need for input of manpower I will refer to this.
AB
Nov 11, 2019
Splunk: hard to use, expensive with predatory pricing, few OOTB rules, SOAR is a premium, good luck training analyst on their platform in under six months. SPLUNK SEARCH. ELK Stack: easy to use, open-source, no predatory pricing, more robust use cases OOTB, loved and used by millions all over the globe, open ecosystem that can integrate with almost any major IT stack out of the box. LUCENE.
 

Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
15%
Government
9%
Manufacturing Company
8%
Financial Services Firm
15%
Computer Software Company
15%
Manufacturing Company
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What do you like most about ELK Elasticsearch?
Logsign provides us with the capability to execute multiple queries according to our requirements. The indexing is very high, making it effective for storing and retrieving logs. The real-time anal...
What is your experience regarding pricing and costs for ELK Elasticsearch?
We used the open-source version of Elasticsearch, which was free.
What needs improvement with ELK Elasticsearch?
It would be useful if a feature for renaming indices could be added without affecting the performance of other features. However, overall, the consistency and stability of Elasticsearch are already...
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

Elastic Enterprise Search, Swiftype, Elastic Cloud
No data available
 

Overview

 

Sample Customers

T-Mobile, Adobe, Booking.com, BMW, Telegraph Media Group, Cisco, Karbon, Deezer, NORBr, Labelbox, Fingerprint, Relativity, NHS Hospital, Met Office, Proximus, Go1, Mentat, Bluestone Analytics, Humanz, Hutch, Auchan, Sitecore, Linklaters, Socren, Infotrack, Pfizer, Engadget, Airbus, Grab, Vimeo, Ticketmaster, Asana, Twilio, Blizzard, Comcast, RWE and many others.
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 Elastic, Luigi's Box, OpenText and others in Indexing and Search. Updated: May 2025.
856,873 professionals have used our research since 2012.