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 #12 with an average rating of 7.4, while OpenText is ranked #26 with an average rating of 6.8. AT&T holds a 1.6% 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

4,307 Views
4,221 Comparison Views

80% willing to recommend

OpenText Enterprise Securit...

Read 98 OpenText Enterprise Security Manager reviews

3,695 Views
3,621 Comparison Views

88% willing to recommend

AlienVault OSSIM

OpenText Enterprise Securit...

Comparison Buyer's Guide

Download the report

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 Its reliance on outdated interfaces may affect user experience in demanding settings.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: March 2026).

Buyer's Guide

AlienVault OSSIM vs. OpenText Enterprise Security Manager

March 2026

Download the complete report

Helped 883,760 peers since 2012

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)

12th

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)

26th

Average Rating

7.8

Reviews Sentiment

6.7

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of March 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.6%, down from 4.1% 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) Mindshare Distribution
Product	Mindshare (%)
AlienVault OSSIM	1.6%
OpenText Enterprise Security Manager	1.5%
Other	96.9%

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 most valuable feature is the logging capability."

"The open vault component and the checking of vulnerabilities are the most valuable features. The page management helps with this. If you know how your device is vulnerable at least you can do something about it."

"The product is majorly used for threat detection of the agents on servers and endpoints."

"The product is easy to use."

"The solution is free to use."

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

"Network traffic analysis is highly efficient."

"The most valuable features of AlienVault OSSIM are vulnerability assessment, network intrusion detection system, response to critical events, and awareness of the whole network."

More AlienVault OSSIM pros

"We do consulting and I get feedback from our clients that the product really helped them with compliance, especially with GDPR."

"The user interfaces are quite good and speedy."

"The out-of-the-box rules that help us configure functioning rules within the environment are valuable."

"On the positive side, ArcSight ESM's performance was excellent. It was very fast when writing queries. It provided good performance monitoring and had built-in rules to show which rules triggered most often and impacted performance. This performance monitoring was well-implemented."

"I am satisfied with the solution's stability."

"I value the event correlation of this product."

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

"The stability of ArcSight Enterprise Security Manager is good."

More OpenText Enterprise Security Manager pros

Cons

"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."

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

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

"The documentation could be improved."

"The incidence reporting could be better."

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

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

"It takes some time. It does not give me a prompt response for any such [malicious] traffic. It takes time to get that alert from the AlienVault system."

More AlienVault OSSIM cons

"We have pricing issues. ArcSight ESM may not be the most user-friendly option, and its interface is quite traditional. However, despite these aspects, we find it a good cybersecurity solution. It needs to improve the dashboards, documentation, and support as well."

"It is quite complex and could use a better UI. So the improvement would be a simplification. It is pretty complicated to use. The architecture is not complex but the setup and use are."

"The dashboard looks a bit cumbersome."

"There are several improvements that we would like to see, including: Building a system based on a log collection (SOC), a scenario for external encroachment, and Operator training."

"The first limitation is with the ArcSight Data Storage Manager (ADSM). ArcSight's total capacity is currently capped at 12 TB. This becomes an issue if a customer needs a longer real-time data retention period, such as exceeding 90 days or reaching a year or even ten months. Increasing the disk space beyond 12 TB is not currently possible."

"The initial setup is very complex. We had to architect a deployment which allowed us to incorporate an ever growing number of customers into our hosted instance of ArcSight."

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

"ArcSight ESM could improve the alerts for the storage capacities or actions."

More OpenText Enterprise Security Manager cons

Pricing and Cost Advice

"The tool's licensing costs are yearly."

"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."

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

"OSSIM is free."

"AlienVault OSSIM is expensive compared to its competitors."

"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."

"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."

More AlienVault OSSIM pricing and cost advice

"The pricing is great compared to others."

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

"ArcSight is pretty expensive compared with its competitors. I believe that is fine as it provides value."

"The solution is super expensive. At our organization size and license model, I think the price is average to what anyone else would charge us."

"It's a good price, it's one of the cheaper solutions."

"ArcSight ESM is an affordable solution, it cost approximately $200,000 for three years. This price was at a substantial discount."

"Price-wise, ArcSight ESM was a bit high compared to competitors, which factored into our decision to switch to Splunk. It couldn't cover all our business needs for what we wanted to implement."

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

More OpenText Enterprise Security Manager pricing and cost advice

See which vendors are best for you

Use our free recommendation engine to learn which Security Information and Event Management (SIEM) solutions are best for your needs.

See recommendations

883,760 professionals have used our research since 2012.

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

Comms Service Provider

12%

Manufacturing Company

Computer Software Company

Financial Services Firm

Marketing Services Firm

12%

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

Wazuh vs AlienVault OSSIM

Compared 33% of the time

Venusense USM vs AlienVault OSSIM

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

More AlienVault OSSIM Competitors

Trellix ESM vs OpenText Enterprise Security Manager

Compared 13% 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

March 2026

Download AlienVault OSSIM product report

Buyer's Guide

OpenText Enterprise Security Manager

February 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

March 2026

Free Report: AlienVault OSSIM vs. OpenText Enterprise Security Manager

Find out what your peers are saying about AlienVault OSSIM vs. OpenText Enterprise Security Manager and other solutions. Updated: March 2026.

DOWNLOAD NOW

883,760 professionals have used our research since 2012.

See our AlienVault OSSIM vs. OpenText Enterprise Security Manager report.

See our list of best Security Information and Event Management (SIEM) vendors.

We monitor all Security Information and Event Management (SIEM) reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.