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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)
24th
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)
13th
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 November 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.2%, down from 2.6% compared to the previous year. The mindshare of Sentinel is 2.6%, down from 3.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Security Information and Event Management (SIEM) Mindshare Distribution
ProductMindshare (%)
Sentinel2.6%
AlienVault OSSIM1.2%
Other96.2%
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.
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

"Asset discovery is good."
"Inbuilt IDS, inbuilt integration with threat intelligence platform and with vulnerability assessment modules."
"A very good feature of AlienVault OSSIM is that it has many domains that can be integrated from different solutions."
"The solution is free to use."
"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."
"It is a perfectly nice and free tool for compliance testing, assessment, and some basic vulnerability."
"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."
"The initial setup is straightforward."
"The solution's Kusto Query Language (KQL) execution time is pretty good."
"Sentinel has positively impacted my organization by improving monitoring significantly."
"The most valuable feature is the flexible log for identifying security threats inside an application. Sentinel is very good at this."
"It makes everything easier by automating some tasks and growing with our needs."
"It provides real time security event analytics."
"The stability is phenomenal and we never had any issues with downtime or even had to restart."
"The tool is simple to use."
"Sentinel gave us logs to tell us what's going right and wrong in your environment so we could secure the network."
 

Cons

"AlienVault OSSIM on-premise version is more difficult to implement than the cloud version. Additionally, they should add integration between several different environments at once and improve their online knowledge base."
"They can add more compliance templates."
"The price of this solution is very high and it could be cheaper."
"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."
"I suggest more in-built rules based on modern threats and environments to make it a more competitive solution."
"Lacking in depth of reporting."
"There needs to be more focus on the NOC and IIS in terms of developing applications for behavior detection."
"It's so hard to configure and explore something new on it. It is not easy to find the steps we need to follow in order to use the solution effectively."
"This product's connection to certain types of cloud systems could be improved."
"You need a lot of Unix scripting knowledge in order to manage the tool, which is one of the main issues that we faced."
"It's probably not a product that I would recommend to anyone."
"There is no integration in the web-side of the tool."
"On version 5, builder was somewhat unstable during deployment -> workaround strong procedure with too many middle steps of saves."
"It is an ancient product."
"The solution does not allow outsourced authorizations."
"There is a need for more flexibility in customization, especially when working with different vendors and platforms."
 

Pricing and Cost Advice

"AlienVault OSSIM is free."
"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."
"AlienVault OSSIM is an open-source solution."
"AlienVault OSSIM is expensive compared to its competitors."
"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 tool's licensing costs are yearly."
"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."
"We are using the community version, which can be used for free."
"The solution’s pricing is aligned with its competitors."
"Sentinel's slightly on the expensive side."
"Sentinel is moderately priced."
"We receive a pricing discount because of our ongoing partnership with Micro Focus."
"We inquired about getting support from the vendor, Micro Focus, but the cost was very high."
"Sentinel is a subscription-based solution."
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Top Industries

By visitors reading reviews
Comms Service Provider
15%
Manufacturing Company
9%
Financial Services Firm
8%
University
8%
Outsourcing Company
11%
Financial Services Firm
9%
Comms Service Provider
8%
Manufacturing Company
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: November 2026.
920,939 professionals have used our research since 2012.