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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
386
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

"Better than other SIEM solutions because almost everything can be integrated."
"The solution has a very good open source community, and whenever we have problems, we are always able to resolve it online."
"Network traffic analysis is highly efficient."
"A very good feature of AlienVault OSSIM is that it has many domains that can be integrated from different solutions."
"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 features of AlienVault OSSIM are vulnerability assessment, network intrusion detection system, response to critical events, and awareness of the whole network."
"I recommend it due to the experience of the people running it."
"The most valuable features of this solution are the data correlation and vulnerability assessment."
"The features of Splunk Enterprise Security that I have found most valuable include the risk-based score and UBA/UEBA, user behavior analytics, or user and entity behavior analytics."
"The client site login is pretty extensible and probably cost-effective."
"Its huge, versatile AppBase helped me to configure and bring data from different sources to a unified platform."
"The incident review in Splunk Enterprise Security seems to be the most helpful feature."
"The initial setup is really straightforward; it's one of the easiest installations."
"Low barrier to start searching with the ability to normalize data on the fly."
"The best features I've experienced over the past six years with Splunk Enterprise Security are the ability to create use cases and the flexibility to customize searches and use cases based on our specific requirements."
"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."
 

Cons

"I suggest more in-built rules based on modern threats and environments to make it a more competitive solution."
"The price of this solution is very high and it could be cheaper."
"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."
"The main area where the AlienVault product was lacking around the 2018 timeframe was in its ability to scale."
"They can add more compliance templates."
"The documentation could be improved."
"The price of this solution is very high and it could be cheaper."
"There needs to be more support or some kind of training program so users can self-learn the system more effectively."
"For instance, if a DLP operations analyst accesses the platform, it should guide them to navigate predefined content for their role. That's something I've already mentioned to them, and I'm eager to see what happens next."
"Right now, it is too easy for a user to write a query, run it, make it available in polling mode (real-time mode), and bring down the server."
"The setup time is quite long."
"Make it easier to include roles and user controls, as it is horrible now."
"Splunk Enterprise Security can be improved with more AI in the commands and more help in the commands, as not all people know how to write code in SPL, and we need more help in this area."
"The technical support here in South Africa hasn't been great, but I understand why as we make up less than 3% of Splunk's total revenue in the world."
"When deploying Enterprise Security, the biggest challenge or the most amount of work that you're going to spend time on is onboarding your data and getting it into a position that allows you to search it uniformly."
"Given the ever-increasing number of threats, I would like Splunk to update its threat signatures more frequently."
 

Pricing and Cost Advice

"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."
"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."
"AlienVault OSSIM is free."
"We are using the community version, which can be used for free."
"The tool's licensing costs are yearly."
"The licensing fees for the non-community edition are paid on an annual basis, and there are no costs in addition to this."
"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."
"Splunk Enterprise Security is not at all cost-friendly to be deployed in very small enterprises like start-ups."
"The subscription is monthly."
"While some clients find the cost of Splunk Enterprise Security to be on the higher end, its pricing is comparable to other SIEM solutions."
"Free Splunk license for PoCs on personal machines and the ability to scale the PoC to an enterprise level app."
"Splunk Enterprise Security is expensive."
"I am fine with the licensing, but in terms of the cost, it is expensive for the data that we have. We have an open discussion with our account rep about this."
"The price of Splunk Enterprise Security fluctuates based on the customer, but I believe it's quite costly, especially for our clientele."
"I think that most of the monitoring solutions are expensive."
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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
14%
Manufacturing Company
8%
Educational Organization
8%
Computer Software Company
8%
Financial Services Firm
14%
Manufacturing Company
9%
Computer Software Company
9%
Government
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 Business117
Midsize Enterprise51
Large Enterprise269
 

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.
892,868 professionals have used our research since 2012.