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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
 

Comparison Buyer's Guide

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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 Its reliance on outdated interfaces may affect user experience in demanding settings.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.

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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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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
31
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
98
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
ProductMindshare (%)
AlienVault OSSIM1.6%
OpenText Enterprise Security Manager1.5%
Other96.9%
Security Information and Event Management (SIEM)
 

Featured Reviews

BP
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
NM
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 is free to use."
"The paid version of the solution has reporting and better scalability options."
"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."
"The dashboard is the solution's most valuable aspect. It brings everything into one central point where I can actually look at it and go, "Okay, I understand what's going on.""
"You can customize the dashboards as well as the reporting."
"The product is easy to use."
"Inbuilt IDS, inbuilt integration with threat intelligence platform and with vulnerability assessment modules."
"The most valuable feature is the logging capability."
More AlienVault OSSIM pros
"ESM has valuable features for event prediction and security analysis."
"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."
"The stability of ArcSight Enterprise Security Manager is good."
"I am satisfied with the solution's stability."
"The feature that I have found the most useful is that it can be deployed to the cloud."
"We use ArcSight ESM for log analysis and security alerts. It warns us of threats and then helps us conduct a forensic investigation of a cyber attack or internal incident after it happens."
"Stable solution with good customer service support."
"ArcSight is customizable. You can integrate just about anything. I also like the ease of use."
More OpenText Enterprise Security Manager pros
 

Cons

"AlienVault OSSIM could improve by having better integration with some of the newer tools."
"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."
"When comparing AlienVault OSSIM to other solutions it looks a bit outdated. Additionally, they need to improve their integration."
"It's under heavy traffic. If you have heavy traffic, the system is slow."
"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 user interface needs to be friendlier across the board."
"The price of this solution is very high and it could be cheaper."
"The correlation engine needs to be improved."
More AlienVault OSSIM cons
"The roadmap is not clear."
"The stability isn't quite perfect. We occasionally run into problems."
"Sometimes, it takes ages to get an issue resolved. I have ArcSight experience, so I normally try to fix things on my own or find a workaround, but it's tough to get support when I need it."
"The analytics feature is not reliable and needs improvement for more detailed analysis.​"
"ArcSight ESM could improve by adding more features and documentation. There needs to be more documentation."
"It would be nice to have it on the cloud so that you can deploy it easily, saving time and resources."
"We would like the ability to easily identify either unused resources or those that are being used sub-optimally."
"The correlation engine effectively connects different events, significantly improving our detection reach. However, limitations exist with non-default alerts, where additional costs arise for integration."
More OpenText Enterprise Security Manager cons
 

Pricing and Cost Advice

"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."
"AlienVault OSSIM is expensive compared to its competitors."
"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."
"AlienVault OSSIM is free."
"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."
More AlienVault OSSIM pricing and cost advice
"The pricing is great compared to others."
"The product licenses are inexpensive."
"ArcSight ESM is an affordable solution, it cost approximately $200,000 for three years. This price was at a substantial discount."
"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."
"There is a license required for this solution."
"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."
"Thanks to Micro Focus's licensing model, as an MSSP, we are able to see a complete return on our investment almost immediately."
"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."
More OpenText Enterprise Security Manager pricing and cost advice
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Comparison Review

VS
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
13%
Manufacturing Company
9%
Financial Services Firm
9%
Computer Software Company
9%
Marketing Services Firm
12%
Manufacturing Company
9%
Financial Services Firm
8%
Performing Arts
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 Business37
Midsize Enterprise14
Large Enterprise57
 

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?
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...
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 Logo
Wazuh vs AlienVault OSSIM
Compared 32% of the time
Venusense USM vs AlienVault OSSIM Logo
Venusense USM vs AlienVault OSSIM
Compared 10% of the time
Splunk Enterprise Security vs AlienVault OSSIM Logo
Splunk Enterprise Security vs AlienVault OSSIM
Compared 7% of the time
USM Anywhere vs AlienVault OSSIM Logo
USM Anywhere vs AlienVault OSSIM
Compared 7% of the time
Elastic Security vs AlienVault OSSIM Logo
Elastic Security vs AlienVault OSSIM
Compared 5% of the time
More AlienVault OSSIM Competitors
Trellix ESM vs OpenText Enterprise Security Manager Logo
Trellix ESM vs OpenText Enterprise Security Manager
Compared 13% of the time
IBM Security QRadar vs OpenText Enterprise Security Manager Logo
IBM Security QRadar vs OpenText Enterprise Security Manager
Compared 9% of the time
SurfWatch Labs SurfWatch vs OpenText Enterprise Security Manager Logo
SurfWatch Labs SurfWatch vs OpenText Enterprise Security Manager
Compared 6% of the time
Splunk Enterprise Security vs OpenText Enterprise Security Manager Logo
Splunk Enterprise Security vs OpenText Enterprise Security Manager
Compared 6% of the time
OpenText Behavioral Signals vs OpenText Enterprise Security Manager Logo
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
AlienVault OSSIM reportDownload AlienVault OSSIM product report
Buyer's Guide
OpenText Enterprise Security Manager
February 2026
OpenText Enterprise Security Manager reportDownload 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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