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...

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 Its reliance on outdated interfaces may affect user experience in demanding settings.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

Buyer's Guide

AlienVault OSSIM vs. OpenText Enterprise Security Manager

March 2026

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Helped 883,824 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

"AlienVault OSSIM's GUI is very user-friendly."

"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."

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

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

"The product is easy to use."

"The initial setup was straightforward. I didn't have any problems."

"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."

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

More AlienVault OSSIM pros

"SmartConnector: Normalization parses raw logs and converts them into CEF (common event format). This is the core of the product."

"The tool is good for correlation and aggregation. We use it as a collection platform."

"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."

"Usability is the most valuable feature. The accessibility is quite good."

"ArcSight Enterprise Security Manager (ESM) works perfectly. It's a stable and scalable product."

"It gives better overall visibility. Before, we didn't have a unified system for managing security alerts. ArcSight introduced various alerts, giving us a better visibility of potential problems."

"It is a very useful tool for intelligence building because it has many use cases and many rule sets."

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

More OpenText Enterprise Security Manager pros

Cons

"I suggest more in-built rules based on modern threats and environments to make it a more competitive solution."

"I would like the solution to be able to integrate with my firewall, my IDS and my Honeypot solutions so that it can provide real-time reporting as things occur and then have alert sent to me on my phone when suspicious activity is happening."

"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."

"They can add more compliance templates."

"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."

"It's so hard to configure and explore something new on it."

"AlienVault OSSIM gives unwanted notifications."

"Lacking in depth of reporting."

More AlienVault OSSIM cons

"They also could improve the product by integrating user and identity behavior analytics."

"Administration of ArcSight is not an easy job. The admin needs to be well experienced in it to identify the root cause and fix it."

"ArcSight is incredibly complex when configuring and deploying, and if your organization doesn't know what they want and what they need, ArcSight will be a challenge for them."

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

"The initial setup could be more straightforward."

"Customer service and support is our biggest challenge."

"The stability of ArcSight Enterprise Security Manager (ESM) is not very robust."

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

More OpenText Enterprise Security Manager cons

Pricing and Cost Advice

"OSSIM is free."

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

"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 the community version, which can be used for free."

"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."

"AlienVault OSSIM is expensive compared to its competitors."

"The tool's licensing costs are yearly."

More AlienVault OSSIM pricing and cost advice

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

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

"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."

"Thanks to Micro Focus's licensing model, as an MSSP, we are able to see a complete return on our investment almost immediately."

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

"Aggregation can help a lot in pushing down licensing costs."

"ArcSight can be a little bit expensive because of the area that we work in and the cost. Licensing is mostly on a yearly basis, not monthly."

"The product licenses are inexpensive."

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.

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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

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.

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