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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)
13th
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
375
Ranking in other categories
Log Management (2nd), IT Operations Analytics (1st)
 

Mindshare comparison

As of February 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.7%, down from 4.2% compared to the previous year. The mindshare of Splunk Enterprise Security is 7.1%, down from 9.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Market Share Distribution
ProductMarket Share (%)
Splunk Enterprise Security7.1%
AlienVault OSSIM1.7%
Other91.2%
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.
reviewer1469784 - PeerSpot reviewer
Senior Manager at a financial services firm with 10,001+ employees
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."
"OSSIM is the only solution that includes the large number of modules that we need: a vulnerability scanner, a network IDS system, a host IDS system."
"The most valuable feature is the logging capability."
"The initial setup is straightforward."
"You can customize the dashboards as well as the reporting."
"The tool's security detection is good. It helps us with login tracking and generating reports. We aim to identify potential issues, such as brute-force attacks on user accounts or server-level anomalies. For instance, if I receive a report indicating a server is at an abnormal level, I investigate and address the issue."
"Network traffic analysis is highly efficient."
"It has helped us remediate threats in the past by providing significant events that assisted in identifying suspicious activities, such as logins from multiple countries."
"We have a one stop dashboard for health of some of our services where you can click in and it takes you to other dashboards that have custom near real-time metrics that show the application's health."
"The level of robustness on offer is very good."
"The SIEM is the most valuable feature of the product."
"My customer was integrated with many third-party credentials and other threat sources as well. The integration part was seamless and easy. The rates for allocating valuable information and IOCs from different sources are also good."
"It helps streamline troubleshooting and log analysis."
"I would assess the stability and reliability of Splunk Enterprise Security as very reliable and very stable."
"I like Splunk's data aggregation and search capabilities."
"The solution has plenty of features that are good."
 

Cons

"The user interface needs to be friendlier across the board."
"The solution needs more integration with cyber intelligence systems."
"There needs to be more support or some kind of training program so users can self-learn the system more effectively."
"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."
"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."
"GUI could be improved."
"AlienVault OSSIM’s configuration and integration could be a little easier."
"AlienVault OSSIM could improve by having better integration with some of the newer tools."
"I'd say I am happy with the technical support, not elated. They provide great support, but sometimes they don't have the answers that I need."
"I would like to see ability to master management. In terms of clustering, how it manages clustering needs improvement."
"Its performance can be better. Sometimes, it takes longer when we do queries."
"Our organization has very limited resources, so we would want to expand some of those automation and AI capabilities to fill those gaps."
"The system can be intimidating, and sometimes the concepts conveyed in the documentation require adjustment."
"Splunk can be an expensive solution. Technical support could be improved as well."
"The user interface is the main area for improvement."
"Splunk could have more built-in use case presets that customers can build on and customize."
 

Pricing and Cost Advice

"We are using the community version, which can be used for free."
"AlienVault OSSIM is free."
"OSSIM is free."
"The solution is open source, so it's free to use."
"AlienVault OSSIM is expensive compared to its competitors."
"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."
"AlienVault pricing is the best. Whatever cost you are paying, you are getting a return on every penny... It's not like your IBM, your QRadar, or Splunk, where the cost is too high."
"AlienVault OSSIM is an open-source solution."
"Splunk can be expensive, as its licensing is based on the daily data ingestion volume."
"Some of the insights that we have obtained as a part of using Splunk have greatly helped us in increasing our revenue in terms of selling our products."
"In addition to the licensing fee, there is also a support and maintenance charge."
"Our ROI is high."
"The license for Splunk Enterprise Security is expensive."
"This product could use better pricing in general."
"You will eat up whatever you purchase quickly. The level of insights that Splunk empowers is addictive."
"The licensing is good, but the pricing absolutely needs some work. It is very high."
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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
Computer Software Company
13%
Comms Service Provider
11%
Financial Services Firm
9%
Educational Organization
8%
Financial Services Firm
12%
Computer Software Company
10%
Manufacturing Company
9%
Government
6%
 

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 Business109
Midsize Enterprise50
Large Enterprise264
 

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: December 2025.
881,515 professionals have used our research since 2012.