No more typing reviews! Try our Samantha, our new voice AI agent.

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
392
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 most valuable feature is the logging capability."
"Its user-friendliness is the most valuable. It is very easy to use and explore. The dashboard is very well packaged and integrated. You don't have to spend a lot of time in configuring it and checking out the RPM etc. It is also free and very powerful."
"I recommend it due to the experience of the people running it."
"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."
"The solution has a very good open source community, and whenever we have problems, we are always able to resolve it online."
"The initial setup was straightforward."
"Asset discovery is good."
"There are a lot of people you will find using OSSIM since they are also offering OTX as a service"
"This is the right choice if you are looking for a platform that can combine all machine-generated data and use it for various use cases from different domains."
"Overall, I would rate it a nine out of ten."
"Splunk Enterprise Security is more advanced compared to other solutions, which makes it stand out as a better option."
"Splunk Enterprise Security streamlines the creation of what they call notables, which takes a lot of the effort that we would have to put into creating our own solution off the table and does it for us."
"It allows for transparency into IT metrics for insightful business analytics."
"They have approximately 50,000 predefined correlation rules, which is quite a lot, and I find that good."
"It has reduced the time to resolution, time to investigate, and time to troubleshoot for debugging issues."
"Splunk Enterprise Security has helped greatly improve the organization's business resilience."
 

Cons

"I would advise others to not implement it for any enterprise-level organization."
"GUI could be improved."
"There needs to be more focus on the NOC and IIS in terms of developing applications for behavior detection."
"AlienVault OSSIM gives unwanted notifications."
"ArcSight works better than AlienVault right now."
"The solution needs more integration with cyber intelligence systems. Our customers want to use a single tool for managing cybersecurity."
"We need more dashboards and we need more customization for dashboards."
"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."
"Splunk Enterprise Security can be improved by having more focus on the data health monitoring aspect, which will definitely be helpful."
"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."
"Queries are not always as easy or straightforward as they might be, so it can be difficult to figure out what you need to look for."
"The solution is expensive."
"Sometimes talking through email isn't the most effective method, as they go through troubleshooting steps we've already taken, which requires additional back-and-forth communication."
"A few years ago, I would have definitely recommended Splunk, but nowadays, better alternatives are available."
"Some additional features that should be included in the next release of Splunk Enterprise Security are an integrated Attack Range, not as a separate solution, providing a way to test the rules in the production environment."
"A problem that we had recently had was we licensed it based on how much data you upload to them every day."
 

Pricing and Cost Advice

"The tool's licensing costs are yearly."
"AlienVault OSSIM is free."
"We are using the community version, which can be used for free."
"We are using a free version of the solution. If you purchase a license there are more features available but the price is a little high. The solution should be cheaper to allow more customers to be able to afford it."
"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 solution is open source, so it's free to use."
"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."
"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."
"It is expensive. I used to buy it early on, but then they combined it into a higher-up organization. They buy it for multiple systems now. Last time, I paid around 60K for it. There is just the licensing fee. That's all."
"Splunk ES is quite expensive compared to some products on the market."
"While Splunk is more expensive than other solutions, we would still choose it because of its capabilities."
"I think that most of the log analytics solutions are expensive and I'm not sure if it's worth it."
"The cost is on the high end, which makes it difficult for some organizations to use."
"The Splunk Enterprise Security license 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 is too high for our market."
report
Use our free recommendation engine to learn which Security Information and Event Management (SIEM) solutions are best for your needs.
896,467 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
7%
Financial Services Firm
14%
Manufacturing Company
9%
Computer Software Company
8%
Comms Service Provider
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 Business123
Midsize Enterprise52
Large Enterprise272
 

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 is your primary use case for AlienVault OSSIM?
This solution is very similar to most of the other MSSPs that you would find out there. When I look at use cases, AlienVault was initially aimed at small to medium businesses. It grew, and that was...
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.
896,467 professionals have used our research since 2012.