AlienVault OSSIM vs OpenText Enterprise Security Manager comparison

AT&T and OpenText are both solutions in the Security Information and Event Management (SIEM) category. AT&T is ranked #13 with an average rating of 7.2, while OpenText is ranked #21 with an average rating of 6.8. AT&T holds a 1.7% mindshare in SIEM, compared to OpenText’s 1.5% mindshare. Additionally, 80% of AT&T users are willing to recommend the solution, compared to 88% of OpenText users who would recommend it.

AlienVault OSSIM

Read 31 AlienVault OSSIM reviews

4,374 Views
4,287 Comparison Views

80% willing to recommend

OpenText Enterprise Securit...

Read 98 OpenText Enterprise Security Manager reviews

3,309 Views
3,210 Comparison Views

88% willing to recommend

AlienVault OSSIM

OpenText Enterprise Securit...

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Executive SummaryUpdated on Dec 28, 2025

OpenText Enterprise Security Manager and AlienVault OSSIM compete in the enterprise security management category. OpenText ESM might have the upper hand with its comprehensive security features, though AlienVault OSSIM stands out for its cost-effectiveness and ease of use.

Features: OpenText ESM offers advanced correlation capabilities, flexible dashboards, and extensive integration options. Its customizable rules and ability to handle complex threats are valuable for enterprise users. AlienVault OSSIM is praised for its easy-to-use interface, integration with various security tools, and its efficient vulnerability assessment and network intrusion detection.

Room for Improvement: OpenText ESM could enhance its high availability, simplify installation processes, and improve its reporting and user interface. AlienVault OSSIM could boost its scalability, integration with new tools, and improve response times for larger environments. Its reliance on outdated interfaces may affect user experience in demanding settings.

Ease of Deployment and Customer Service: OpenText ESM provides flexible deployment options like on-premises, hybrid, and cloud, but it requires skilled personnel for implementation. Its customer service often lacks depth and speed. AlienVault OSSIM, mainly on-premises, is known for fast setup and simplicity in small to medium projects; however, its customer service also requires improvement to meet enterprise needs effectively.

Pricing and ROI: OpenText ESM's pricing is high, reflecting its enterprise-level capabilities, and presents a challenge for budget-constrained organizations. Nevertheless, it promises satisfactory ROI over time due to its robust features. AlienVault OSSIM, being an open-source solution, offers a very cost-effective alternative with attractive ROI for organizations with tight budgets. However, enhancing scalability and integration might require further investment for larger enterprises.

To learn more, read our detailed AlienVault OSSIM vs. OpenText Enterprise Security Manager Report (Updated: December 2025).

Buyer's Guide

AlienVault OSSIM vs. OpenText Enterprise Security Manager

December 2025

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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

Ranking in Security Information and Event Management (SIEM)

13th

Average Rating

7.4

Reviews Sentiment

7.1

Number of Reviews

Ranking in other categories

No ranking in other categories

OpenText Enterprise Securit...

Ranking in Security Information and Event Management (SIEM)

21st

Average Rating

7.8

Reviews Sentiment

6.7

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of February 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.7%, down from 4.2% compared to the previous year. The mindshare of OpenText Enterprise Security Manager is 1.5%, up from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Security Information and Event Management (SIEM) Market Share Distribution
Product	Market Share (%)
AlienVault OSSIM	1.7%
OpenText Enterprise Security Manager	1.5%
Other	96.8%

Security Information and Event Management (SIEM)

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.

Read full review

Namdev Magar

Senior Security Engineer at Valuepoint Systems

Interpreting data effectively despite challenges in integration and support

If someone lacks the budget for a new SIEM tool with advanced capabilities, I would recommend ArcSight Enterprise Security Manager (ESM). However, if they have the budget, I would suggest looking into other options. Overall, I would give ArcSight Enterprise Security Manager (ESM) a rating of seven out of ten.

Read full review

Quotes from Members

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

Pros

"The solution has a very good open source community, and whenever we have problems, we are always able to resolve it online."

"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."

"There are a lot of people you will find using OSSIM since they are also offering OTX as a service"

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

"Asset discovery is good."

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

"OSSIM is the only solution that includes the large number of modules that we need: a vulnerability scanner, a network IDS system, a host IDS system."

More AlienVault OSSIM pros

"ESM has valuable features for event prediction and security analysis."

"The feature that I have found the most useful is that it can be deployed to the cloud."

"ArcSight gives us better visibility into threats that were unknown earlier."

"The user interfaces are quite good and speedy."

"The most important feature is ArcSight's event correlation capabilities. It's powerful and easy. I also like the flex connector capability. It's easy to develop a new connector that isn't fully supported out of the box. For example, say you created a solution internally that's completely different, and it's not unsupported by the solution. You can write your own connector using the flex connector."

"Some of the benefits of using this solution are rapid correlation and near-time response on alerts."

"When WannaCry attacks I can minimize the damage. My company had no protection at the time. We get alerts in ArcSight and then whenever a user got a copy of WannaCry and the WannaCry malware wants to connect to the mother ship, it alerts me in the ArcSight dashboard, and that helps us a lot. We then just go to the user and erase the malware."

"Once the rules are defined, it becomes easy to detect changes and generate automated logs."

More OpenText Enterprise Security Manager pros

Cons

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

"Lacking in depth of reporting."

"GUI could be improved."

"There needs to be more support or some kind of training program so users can self-learn the system more effectively."

"AlienVault OSSIM gives unwanted notifications."

"It's under heavy traffic. If you have heavy traffic, the system is slow."

"The documentation could be improved."

"The solution needs more integration with cyber intelligence systems."

More AlienVault OSSIM cons

"ArcSight ESM needs to improve performance, user interface, and automation."

"The tool should improve its UI. It also should make data more searchable."

"Customer service and support is our biggest challenge."

"Could benefit from a more modern interface."

"I would like for them to integrate mobile devices. Integration or any kind of functionality which will act as a substitute for IBM so that we can really track our mobile devices as well as look at SIEM."

"Micro Focus does not have a physical presence here in Pakistan, although IBM does."

"They should try to include business logic vulnerabilities in the SIEM tool."

"The weakness in this system comes about because, with so many different logs, it is possible that the security analyst will lose information."

More OpenText Enterprise Security Manager cons

Pricing and Cost Advice

"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 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."

"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."

"AlienVault OSSIM is free."

"AlienVault OSSIM is expensive compared to its competitors."

"The solution is open source, so it's free to use."

"The licensing fees for the non-community edition are paid on an annual basis, and there are no costs in addition to this."

More AlienVault OSSIM pricing and cost advice

"The licensing cost is affordable if you get an enterprise license. The licensing is based on EPS, so you can probably provide a package of license for multiple ESMs with their correlational end fees. It is cost-effective."

"The cost of the solution is not very high, although hiring a qualified analyst to work with the product is expensive."

"Customers without a ton of resources to dedicate to deployment may be better served by a managed ArcSight service."

"The pricing is great compared to others."

"HPE ArcSight pricing might be more expensive than other SIEM solutions, but in my opinion it has powerful features and great flexibility in developing complex use cases."

"We have a license to use this solution. The price of ArcSight Enterprise Security Manager is expensive."

"There is a license required for this solution."

"It is best to be an institutional buyer and directly contact the sales team, as they can provide over-the-top discounts for bulk orders."

More OpenText Enterprise Security Manager pricing and cost advice

See which vendors are best for you

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Comparison Review

Vinod Shankar

Manager, Enterprise Risk Consulting at a tech company with 1,001-5,000 employees

Jun 28, 2015

Qradar vs. ArcSight

Continuing with the SIEM posts we have done at Infosecnirvana, this post is a Head to head comparison of the two Industry leading SIEM products in the market – HP ArcSight and IBM QRadar Both the products have consistently been in the Gartner Leaders Quadrant. Both HP and IBM took over niche SIEM…

Read full review

Top Industries

By visitors reading reviews

Computer Software Company

13%

Comms Service Provider

11%

Financial Services Firm

Manufacturing Company

Marketing Services Firm

13%

Manufacturing Company

Financial Services Firm

Performing Arts

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

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

By reviewers
Company Size	Count
Small Business	37
Midsize Enterprise	14
Large Enterprise	57

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?

See all answers

Which is the best SIEM tool for a mid-sized financial services firm: Arcsight or Securonix?

In my market, a lot of financial companies had or have an ArcSight installation. Just because in former times it was pretty good. Now a lot of them are looking for a more effective solution due to ...

See all answers

What do you like most about ArcSight Enterprise Security Manager (ESM)?

We utilize ArcSight ESM for real-time threat detection in our organization. We have custom rules that we've developed on top of the WAN services, along with scheduled licensing activities.

See all answers

What is your experience regarding pricing and costs for ArcSight Enterprise Security Manager (ESM)?

ArcSight Enterprise Security Manager (ESM) is very cheap compared to other tools. It is worth the investment if you are considering the cost.

See all answers

Comparisons

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Compared 40% of the time

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Compared 10% of the time

Splunk Enterprise Security vs AlienVault OSSIM

Compared 7% of the time

USM Anywhere vs AlienVault OSSIM

Compared 7% of the time

Elastic Security vs AlienVault OSSIM

Compared 5% of the time

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Trellix ESM vs OpenText Enterprise Security Manager

Compared 14% of the time

IBM Security QRadar vs OpenText Enterprise Security Manager

Compared 9% of the time

SurfWatch Labs SurfWatch vs OpenText Enterprise Security Manager

Compared 7% of the time

Splunk Enterprise Security vs OpenText Enterprise Security Manager

Compared 6% of the time

OpenText Behavioral Signals vs OpenText Enterprise Security Manager

Compared 4% of the time

More OpenText Enterprise Security Manager Competitors

Product Reports

Buyer's Guide

AlienVault OSSIM

January 2026

Download AlienVault OSSIM product report

Buyer's Guide

OpenText Enterprise Security Manager

January 2026

OpenText Enterprise Security Manager report

Download OpenText Enterprise Security Manager product report

Also Known As

OSSIM

Micro Focus ArcSight, HPE ArcSight, ArcSight

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

OpenText Enterprise Security Manager enables real-time threat detection through scalable and adaptable solutions, integrating seamlessly with multiple platforms for complex security scenarios across different environments.

OpenText Enterprise Security Manager offers extensive security monitoring capabilities, combining log analysis and incident management to enhance cybersecurity and compliance. Its powerful event correlation engine provides real-time alerts for rapid incident response. Users benefit from customizable dashboards and comprehensive log collection, making it a significant tool in the SIEM market. Flexible deployment options cater to both on-premises and cloud environments, supporting enterprises in managing IT infrastructure and threat detection efficiently.

What are the key features of OpenText Enterprise Security Manager?

Event Correlation Engine: Real-time threat detection with advanced correlation capabilities.
Scalability: Adapts to enterprise-level demands and complex security needs.
Integration: Seamlessly integrates with multiple platforms and third-party tools.
Customizable Dashboards: Tailored views and active lists enhance user experience.
Advanced Alerting: Provides timely incident response and security alerts.

Why should users look for reviews when evaluating OpenText Enterprise Security Manager?

Timely Incident Responses: Fast alerting and action against threats.
User-Friendly Experience: Customizable dashboards simplify monitoring tasks.
Comprehensive Security Management: Integrated log management and threat detection across domains.
Adaptability and Scalability: Supports both on-premises and cloud deployments.

In industries such as finance, healthcare, and energy, OpenText Enterprise Security Manager is implemented for monitoring critical systems and ensuring compliance with regulatory needs. Enterprises leverage its capabilities for forensic investigations and active threat management, serving as a central hub for cybersecurity operations across diverse IT infrastructures.

OpenText

Sample Customers

Council Rock School District

Lake Health, U.S. Department of Health and Human Services, Bank AlJazira, Banca Intesa, and Obrela.

Buyer's Guide

AlienVault OSSIM vs. OpenText Enterprise Security Manager

December 2025

Free Report: AlienVault OSSIM vs. OpenText Enterprise Security Manager

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