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AlienVault OSSIM vs Splunk Enterprise Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jan 25, 2026

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

AlienVault OSSIM
Ranking in Security Information and Event Management (SIEM)
16th
Average Rating
7.4
Reviews Sentiment
7.1
Number of Reviews
31
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
7.3
Number of Reviews
388
Ranking in other categories
Log Management (1st), IT Operations Analytics (1st)
 

Mindshare comparison

As of May 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.3%, down from 3.6% compared to the previous year. The mindshare of Splunk Enterprise Security is 7.1%, down from 9.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Mindshare Distribution
ProductMindshare (%)
Splunk Enterprise Security7.1%
AlienVault OSSIM1.3%
Other91.6%
Security Information and Event Management (SIEM)
 

Featured Reviews

BP
Independent Contractor at a comms service provider with 5,001-10,000 employees
Enables cost-effective security management for small businesses
Scaling for USM is always challenging for any product unless it is purpose-built or overbuilt at the front end. They will use Palo Alto and its competitors, and LevelBlue will manage that implementation. The main area where the AlienVault product was lacking around the 2018 timeframe was in its ability to scale. By pushing it to a cloud-based system, they've largely alleviated scale issues. It's native in Amazon but will also run in Azure. They have worked with cloud service providers to offer enough throughput at a cost reasonable for a corporation. Scaling was their biggest problem, and they've largely conquered those issues.
Sathis-Kumar - PeerSpot reviewer
Senior Manager at Bank of America
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.

Quotes from Members

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

Pros

"The initial setup was straightforward."
"The most valuable features of AlienVault OSSIM are case management, ease of configuration, and investigation."
"Better than other SIEM solutions because almost everything can be integrated."
"What I like about this product, is that it is a fully-fledged solution."
"I have worked with LogRhythm in the past, since 2015, and I find that AlienVault is a better product."
"This solution is very stable; it runs on a Linux box, you only interface with it through the GUI, it works behind the scenes, and it has never crashed in the time that I have used it."
"The most valuable feature is the logging capability."
"The threat policies of the solution are always very advanced and the best in the market, and they are very persistent in terms of keeping up with security protocols."
"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."
"We enjoy the whole solution; it is meeting our requirements, especially the SIM solution."
"Splunk can extract all kinds of data. There's no limitation on what kind of structured and unstructured data one needs to extract — it can access any kind of data, including machine-generated data."
"The features of Splunk Enterprise Security that I find most valuable include Mission Control, which I really appreciate, the way accelerated data functions, making it really fast to see, the integration with SOAR, which is something really cool and integrates with automated processes, and the way to ingest threat intelligence feeds, which is an amazing feature as well."
"It has quite extensive support in terms of integration. If you want to do anything, there are tools for that."
"What is nice about the solution is that it makes it easy to build the queries, search for the events and then do analysis."
"The Splunk queries are valuable."
"Technical support and the online community are some of the best for any product."
 

Cons

"The log collection is okay, but tracing the logs or tracing the events is a bit difficult."
"There needs to be more support or some kind of training program so users can self-learn the system more effectively."
"The price of this solution is very high and it could be cheaper."
"The correlation engine needs to be improved."
"Sometimes technical issues take very long to get resolved."
"I would like the solution to be able to integrate with my firewall, my IDS and my Honeypot solutions so that it can provide real-time reporting as things occur and then have alert sent to me on my phone when suspicious activity is happening."
"When comparing AlienVault OSSIM to other solutions it looks a bit outdated. Additionally, they need to improve their integration."
"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."
"Splunk should be able to integrate with other product using the free version."
"Although the technical support is adequate, there is still room for improvement."
"It takes time to train people."
"The support is not so good, I would only give them a rating of six or seven."
"Splunk Enterprise Security is great but can have some frustration points. It can sometimes be slower to use."
"The product's price may be an area of concern where improvements are required."
"The product was difficult to back up the first time."
"Splunk Enterprise Security can be improved mainly from the user interface regarding the visualizations. They are working on it, yet there are only five to ten very basic visualizations."
 

Pricing and Cost Advice

"The licensing fees for the non-community edition are paid on an annual basis, and there are no costs in addition to this."
"When comparing AlienVault OSSIM to Microsoft Sentinel, AlienVault OSSIM incurs additional costs due to its licensing price structure. If you are using AlienVault for security purposes at a certain level it can have a higher price point than the current pricing of Microsoft Sentinel."
"AlienVault OSSIM is expensive compared to its competitors."
"AlienVault OSSIM is free."
"OSSIM is open source, and USM is the paid license. So, if you want, you can switch to USM. There you will have to buy a license, and they have a support team that helps you out on issues you face."
"OSSIM is free."
"The solution is open source, so it's free to use."
"The tool's licensing costs are yearly."
"The licensing costs are high for Splunk Enterprise Security."
"The pricing is a little bit on the higher side, but looking at what Splunk provides us, it is reasonable."
"Our ROI is high."
"Be upfront about your needs and expectations. Splunk is great to work with."
"The pricing and licensing of the product are quite high."
"The pricing can be better. We are already considering Elastic because Splunk is too expensive. You have to pay based on per-day ingestion. There should be a more flexible model for the use cases where one day you have a huge amount, and on other days, it is quite less."
"While Splunk offers generous developer licenses and obtaining annual licenses is straightforward, the cost is a major consideration."
"Splunk Enterprise Security is an expensive solution."
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Use our free recommendation engine to learn which Security Information and Event Management (SIEM) solutions are best for your needs.
894,668 professionals have used our research since 2012.
 

Comparison Review

VS
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…
 

Top Industries

By visitors reading reviews
Comms Service Provider
15%
Manufacturing Company
8%
Computer Software Company
8%
Educational Organization
8%
Financial Services Firm
14%
Manufacturing Company
9%
Computer Software Company
9%
Comms Service Provider
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business18
Midsize Enterprise9
Large Enterprise8
By reviewers
Company SizeCount
Small Business119
Midsize Enterprise50
Large Enterprise270
 

Questions from the Community

What is your experience regarding pricing and costs for AlienVault OSSIM?
It depends. I would need to review their cost models, but generally, they are on a scaled basis based on throughput usage. Because it's a software as a service solution for their core product for U...
What needs improvement with AlienVault OSSIM?
Scaling for USM is always challenging for any product unless it is purpose-built or overbuilt at the front end. They will use Palo Alto and its competitors, and LevelBlue will manage that implement...
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

OSSIM
No data available
 

Overview

 

Sample Customers

Council Rock School District
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 AlienVault OSSIM vs. Splunk Enterprise Security and other solutions. Updated: April 2026.
894,668 professionals have used our research since 2012.