AlienVault OSSIM vs i-SIEM [EOL] comparison

AT&T and LevelBlue are both solutions in the Security Information and Event Management (SIEM) category. Additionally, 80% of AT&T users are willing to recommend the solution, compared to 100% of LevelBlue users who would recommend it.

AlienVault OSSIM

Read 31 AlienVault OSSIM reviews

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4,221 Comparison Views

80% willing to recommend

i-SIEM [EOL]

Read 1 i-SIEM [EOL] review

100% willing to recommend

AlienVault OSSIM

i-SIEM [EOL]

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Executive SummaryUpdated on Nov 2, 2025

AlienVault OSSIM and i-SIEM [EOL] are competing in the SIEM market. AlienVault OSSIM often leads in pricing and support, while i-SIEM [EOL] is preferred for its features.

Features: AlienVault OSSIM integrates with various security tools, offers real-time threat detection and response, and provides multiple plugins for customization. i-SIEM [EOL] has advanced analytics, a comprehensive dashboard, and allows for automation.

Ease of Deployment and Customer Service: AlienVault OSSIM generally offers simple deployment with solid support services. i-SIEM [EOL] has a customizable deployment model but may require more technical skill. Customer service for AlienVault OSSIM is favorably rated, while i-SIEM [EOL] provides dedicated support that may need more time.

Pricing and ROI: AlienVault OSSIM is known for low setup costs and a quick return on investment. i-SIEM [EOL] has a higher initial investment but offers powerful features that can deliver greater long-term value.

To learn more, read our detailed Security Information and Event Management (SIEM) Report (Updated: March 2026).

Buyer's Guide

Security Information and Event Management (SIEM)

March 2026

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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

Average Rating

7.4

Reviews Sentiment

7.1

Number of Reviews

Ranking in other categories

Security Information and Event Management (SIEM) (12th)

i-SIEM [EOL]

Average Rating

9.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Featured Reviews

Brandon Pearce

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.

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Dannie Combs

Senior Vice President and Chief Information Security Officer at Donnelley Financial Solutions

The alert fatigue and false positive rates have just plummeted, which is really exciting.

empow has a few areas of improvement as with any other technology, such as continuing to drive innovation in the dashboard. While we've been extremely impressed with the dashboard's ease of use, flexibility, ability to drill down deeply, and focus very intently on an area of interest, there will always be opportunities to be more innovative and open it up to a wider audience than just the operations group, for example. With reporting, there is always a desire to have custom reporting for every client of empow. Relative to keeping up with the sheer pace of cloud-native technologies, it should provide more options for clients to deploy their technologies in unique ways. This is an area that I recommend that they maintain focus.

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Quotes from Members

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

Pros

"You pay monthly for the solution. I think it's one of the best products. If you compare with other companies, like LogRhythm, etc., the top 8 or 10 CMs, I think Alien Vault has the best price-performance ratio."

"The paid version of the solution has reporting and better scalability options."

"The threat policies of the solution are always very advanced and the best in the market, and they are very persistent in terms of keeping up with security protocols."

"Better than other SIEM solutions because almost everything can be integrated."

"The most valuable features of this solution are the data correlation and vulnerability assessment."

"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."

"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."

"Technical support is excellent; they are very helpful and responsive."

More AlienVault OSSIM pros

"As a result of the automation, we are able to manage SIEM with a small security team. I'm in a unique position where we have been growing the security organization quite rapidly over the last three and a half years. But, as a direct result of the empow transition and legacy collection of tools towards the empow platform, we've been able to keep that head count flat. We've been able to redirect a lot of the security team's time away from the wash, rinse, repeat activities of responding to alarms where we have a high degree of confidence that they will be false positives, adjusting the rules accordingly. This can be a bit frustrating for the analyst when they have to spend hours a day dealing with these types of probable false positives. So, it has helped not only us keep our headcount flat relative to the resources necessary to provide the assurances that our executives expect of us for monitoring, but allows our analyst team to spend the majority of their time doing what they love. They are spending their time meaningfully with a higher degree of confidence and enjoying getting into the incident response type activity."

"From a monitoring and incident response perspective, empow is the most valuable asset we have in our toolkit."

Cons

"The main area where the AlienVault product was lacking around the 2018 timeframe was in its ability to scale."

"The price of this solution is very high and it could be cheaper."

"Sometimes it takes very long for your issue to get resolved."

"The user interface could be improved."

"ArcSight works better than AlienVault right now."

"The user interface needs to be friendlier across the board."

"AlienVault OSSIM’s configuration and integration could be a little easier."

"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."

More AlienVault OSSIM cons

"Relative to keeping up with the sheer pace of cloud-native technologies, it should provide more options for clients to deploy their technologies in unique ways."

"Relative to keeping up with the sheer pace of cloud-native technologies, it should provide more options for clients to deploy their technologies in unique ways. This is an area that I recommend that they maintain focus."

Pricing and Cost Advice

"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."

"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."

"We are using the community version, which can be used for 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."

"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."

"AlienVault OSSIM is an open-source solution."

More AlienVault OSSIM pricing and cost advice

"I don't have to put up with any longer with these hypercomplex licensing agreements. Every time I want to add some additional reporting as a compliance centric or regulatory specific, e.g., GDPR, PCI, or Sarbanes-Oxley, many providers would have an additional license for this, which felt a bit ridiculous to me. With the simplified licensing architecture, there were no hidden "gotchas" down the road with empow. Something I have experienced with other providers that I've worked with in the past."

"With a higher degree of fidelity in the alarms, we were able to avoid adding additional resources to our teams. We take into account the cost of security resources in the market and the significantly higher fidelity from the alarms that are being generated. This drove down our costs with our MSSP. It drove down my cost for human capital internally. It drove down our need to have multiple resources supporting the underlying infrastructure and health and maintenance of empow as a platform from several resources down to one. Therefore, human capital costs were significantly reduced. Our operating expenses were significantly reduced. Our capital costs were significantly reduced while tripling our capacity and our run rate reduced. It was almost a "too good to be true" situation. Fortunately, for us, it worked out very nicely."

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Top Industries

By visitors reading reviews

Comms Service Provider

12%

Manufacturing Company

Financial Services Firm

Computer Software Company

Performing Arts

10%

Government

Media Company

Outsourcing Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	18
Midsize Enterprise	9
Large Enterprise	8

No data available

Questions from the Community

What do you like most about AlienVault OSSIM?

Asset discovery is good.

See all answers

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...

See all answers

What needs improvement with AlienVault OSSIM?

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Product Reports

Buyer's Guide

AlienVault OSSIM

March 2026

Download AlienVault OSSIM product report

Buyer's Guide

Security Information and Event Management (SIEM)

March 2026

Download i-SIEM [EOL] product report

Also Known As

OSSIM

No data available

Overview

AlienVault OSSIM, Open Source Security Information and Event Management (SIEM), provides you with a feature-rich open source SIEM complete with event collection, normalization and correlation. Launched by security engineers because of the lack of available open source products, AlienVault OSSIM was created specifically to address the reality many security professionals face: A SIEM, whether it is open source or commercial, is virtually useless without the basic security controls necessary for security visibility.

AT&T

i-SIEM [EOL] is an innovative security information and event management platform designed to enhance threat detection and response capabilities in IT environments.

i-SIEM [EOL] offers a comprehensive approach to managing and analyzing security alerts, ensuring that businesses can effectively mitigate risks. With advanced threat intelligence and robust analytics, it helps organizations streamline their security operations and improve incident response times, providing each organization the information required to make informed security decisions.

What are the most important features of i-SIEM [EOL]?

Real-time Monitoring: Continuously tracks network activity to detect potential threats.
Advanced Threat Detection: Utilizes AI to identify sophisticated attacks.
Customizable Dashboards: Allows users to tailor their view and focus on relevant data.
Automated Incident Response: Streamlines the response process by automating certain actions.
Scalable Architecture: Easily adapts to growing business needs.

What benefits and ROI should users consider in reviews?

Improved Security Posture: Enhanced monitoring capabilities reduce risk exposure.
Operational Efficiency: Automation cuts down manual efforts and saves time.
Increased Visibility: Comprehensive insights into activity improve decision-making.
Cost Management: Helps allocate resources more effectively, potentially reducing costs.

i-SIEM [EOL] is particularly beneficial in industries such as finance and healthcare where data security is paramount. Its ability to integrate with existing infrastructure allows seamless adoption, offering enhanced security without disrupting operations. Industries handling sensitive information value its advanced capabilities to safeguard data integrity.

LevelBlue

Sample Customers

Council Rock School District

University of Oklahoma, Donnelley

Buyer's Guide

Security Information and Event Management (SIEM)

March 2026

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