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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
387
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 product is majorly used for threat detection of the agents on servers and endpoints."
"If you compare with other companies, like LogRhythm, etc., the top 8 or 10 CMs, I think AlienVault has the best price-performance ratio."
"Better than other SIEM solutions because almost everything can be integrated."
"The solution is free to use."
"The dashboard is the solution's most valuable aspect. It brings everything into one central point where I can actually look at it and go, "Okay, I understand what's going on.""
"What I like about this product, is that it is a fully-fledged solution."
"The most valuable features of this solution are the data correlation and vulnerability assessment."
"The initial setup was straightforward."
"The features of Splunk Enterprise Security that I find most valuable are the correlation and correlation data."
"Splunk may be more costly upfront, but in the long run, it saves on time and man-hours."
"The ease of use and building queries, specifically SQL queries, is notably beneficial as it is easy to build, and the data model itself is very simple."
"To get visibility from your network devices, servers, and security devices is a great feature."
"I really like the user interface and how it works."
"It has been really good at consolidating a lot of data from different sources. It's really good at generating summaries."
"Overall, Splunk is among the top three SIEM tools due to its capabilities and agility in bridging business analytics with security needs."
"The initial setup is really straightforward; it's one of the easiest installations."
 

Cons

"The incidence reporting could be better."
"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."
"We need more dashboards and we need more customization for dashboards."
"There are somewhat more false positives with the user behavior analytics, which could benefit from an additional machine learning model to detect user patterns more rapidly."
"We need more dashboards and we need more customization for dashboards."
"There needs to be more support or some kind of training program so users can self-learn the system more effectively."
"The solution is not scalable."
"AlienVault OSSIM could improve by having better integration with some of the newer tools."
"If it could be made available as a service, this would be much better than as a product."
"You do need a lot of training and certification with this product."
"The only improvement I am expecting is the cost of the licensing. Clients are going to other solutions just because of the cost."
"One improvement I want to foresee is that the AI or agent needs to be fed with accurate data, not false data, so that whenever it performs automation on your behalf, it doesn't misconfigure anything."
"If we want to filter alerts, currently it's a very manual process. We identify IP addresses and usernames and must manually filter them."
"Free-floating panels in the dashboards are like a glass table. It needs more formatting control without having to be an admin."
"The licensing price is high and has room for improvement."
"Professional support is great, but too expensive."
 

Pricing and Cost Advice

"The solution is open source, so it's free to use."
"OSSIM is free."
"I used the paid version of the tool and found it to be expensive. It has been a while since I changed to Securonix. I will have to check whether AlienVault charges per device, user, or log."
"The tool's licensing costs are yearly."
"The price of AlienVault OSSIM is too high sometimes for us to present to our customers. The price should be lower. We are on a three-year license to use the solution. We had to pay extra for the support."
"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."
"AlienVault OSSIM is an open-source solution."
"AlienVault OSSIM is free."
"As a team, we prefer the old pricing model with a perpetual license. We are still evaluating the whole subscription-based model."
"Splunk's cost is very high. They need to review the pricing. They have to go back and totally readdress the market."
"While some clients find the cost of Splunk Enterprise Security to be on the higher end, its pricing is comparable to other SIEM solutions."
"Splunk has always been on the expensive side."
"The Splunk Enterprise Security license is expensive."
"The pricing is a little bit on the higher side, but looking at what Splunk provides us, it is reasonable."
"While licensing can be a concern, there are ways to reduce the licensing costs including filtering some events."
"It is possible to use a developer's license, which is up to 10GB per day of volume traffic, which is usually enough for most use cases."
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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%
Educational Organization
8%
Computer Software Company
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 Business118
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.
893,438 professionals have used our research since 2012.