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AlienVault OSSIM vs Sentinel comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Sep 18, 2024

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)
25th
Average Rating
7.4
Reviews Sentiment
7.1
Number of Reviews
31
Ranking in other categories
No ranking in other categories
Sentinel
Ranking in Security Information and Event Management (SIEM)
15th
Average Rating
7.6
Reviews Sentiment
6.8
Number of Reviews
18
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.2%, down from 3.1% compared to the previous year. The mindshare of Sentinel is 2.7%, down from 4.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Mindshare Distribution
ProductMindshare (%)
Sentinel2.7%
AlienVault OSSIM1.2%
Other96.1%
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.
PT
Senior Specialist at a tech vendor with 10,001+ employees
Improved incident monitoring has reduced false positives and supports audit-ready reporting
The best features Sentinel offers, in my experience, include the filtering features and the ability to run KQL queries so that I can understand what table has what and when the last log has been monitored and reported. Sentinel has positively impacted my organization by improving monitoring significantly. As a pay-as-you-go service, we are ingesting logs as needed. When the pay-as-you-go service is enabled, we can either ingest whenever there is a spike in the logs, and when there are fewer logs, we can reduce the ingestion. This approach is helpful for both the organization and me. In terms of metrics showing how Sentinel has helped, as part of log filtering, we have reduced around thirty to thirty-five percent of false-positive incident creation. We have also cleared some audits by enabling log retention in Sentinel, allowing us to pull out data for audits when necessary using both hot retention and cold retention. This has helped the organization as a whole.

Quotes from Members

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

Pros

"A very good feature of AlienVault OSSIM is that it has many domains that can be integrated from different solutions."
"The solution is very stable, and compared to QRadar and Splunk, it's very stable."
"It is a perfectly nice and free tool for compliance testing, assessment, and some basic vulnerability."
"You can customize the dashboards as well as the reporting."
"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."
"Asset discovery is good."
"I recommend it due to the experience of the people running it."
"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."
"Sentinel gave us logs to tell us what's going right and wrong in your environment so we could secure the network."
"The solution lets us get all the logs properly and regularly monitor customer infrastructure."
"Sentinel is a tool that, if it's well configured, removes from view all unnecessary information and shows you only needful entries, so you can do your job faster, more conveniently, and with high performance."
"Transactional user information improves security, prevents fraud, and promotes best practices."
"The stability is phenomenal and we never had any issues with downtime or even had to restart."
"If Sentinel is integrated with Identity Manager and User Application Portal, the solution runs simply perfect!"
"Sentinel has positively impacted my organization by improving monitoring significantly."
"It provides real time security event analytics."
 

Cons

"The correlation engine needs to be improved."
"AlienVault OSSIM gives unwanted notifications."
"The user interface could be improved."
"AlienVault OSSIM’s configuration and integration could be a little easier."
"The main area where the AlienVault product was lacking around the 2018 timeframe was in its ability to scale."
"There needs to be more focus on the NOC and IIS in terms of developing applications for behavior detection."
"There needs to be more support or some kind of training program so users can self-learn the system more effectively."
"AlienVault OSSIM is costly."
"The dashboard and customer view should be improved."
"There are still a few vendor-specific devices for which Sentinel needs to work on integration, such as Netskope devices."
"I rate Sentinel a six out of ten for scalability."
"I would prefer to extend dashboards part and their functions in Web GUI version, so the charts could be for configurable."
"On version 5, builder was somewhat unstable during deployment -> workaround strong procedure with too many middle steps of saves."
"The solution does not allow outsourced authorizations."
"There is a need for more flexibility in customization, especially when working with different vendors and platforms."
"This product's connection to certain types of cloud systems could be improved."
 

Pricing and Cost Advice

"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."
"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."
"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."
"We are using the community version, which can be used for free."
"The tool's licensing costs are yearly."
"OSSIM is free."
"The licensing fees for the non-community edition are paid on an annual basis, and there are no costs in addition to this."
"The solution is open source, so it's free to use."
"The solution’s pricing is aligned with its competitors."
"Sentinel is moderately priced."
"Sentinel is a subscription-based solution."
"Sentinel's slightly on the expensive side."
"We inquired about getting support from the vendor, Micro Focus, but the cost was very high."
"We receive a pricing discount because of our ongoing partnership with Micro Focus."
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Top Industries

By visitors reading reviews
Comms Service Provider
14%
Financial Services Firm
8%
Manufacturing Company
7%
University
7%
Outsourcing Company
10%
Financial Services Firm
9%
Manufacturing Company
8%
Comms Service Provider
8%
 

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 Business9
Midsize Enterprise3
Large Enterprise8
 

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 is your experience regarding pricing and costs for NetIQ Sentinel?
My experience with pricing, setup cost, and licensing shows that while it is a little on the higher side, since it is part of a package for all Microsoft products, I feel it is a better choice comp...
What needs improvement with NetIQ Sentinel?
Sentinel needs minimal improvement, though improvements are ongoing. Everything seems to be functioning perfectly, and I don't have any specific inputs for improvements I would like to see in Senti...
What is your primary use case for NetIQ Sentinel?
My main use case for Sentinel is that I'm a subject matter expert for Sentinel, specifically for security incident event and event management. I head the SME for SIEM in LTIMindtree for this curren...
 

Also Known As

OSSIM
NetIQ Sentinel, Novell SIEM
 

Overview

 

Sample Customers

Council Rock School District
Faysal Bank, GaVI, Handelsbanken, ISC Mªnster, Lambeth Council, Swisscard, The Municipality of Siena, Tukes, University of Dayton, University of the Sunshine Coast
Find out what your peers are saying about AlienVault OSSIM vs. Sentinel and other solutions. Updated: September 2026.
913,924 professionals have used our research since 2012.