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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 #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
 

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 Its reliance on outdated interfaces may affect user experience in demanding settings.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: February 2026).
Buyer's Guide
AlienVault OSSIM vs. OpenText Enterprise Security Manager
February 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)
13th
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)
21st
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 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
ProductMarket Share (%)
AlienVault OSSIM1.7%
OpenText Enterprise Security Manager1.5%
Other96.8%
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 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."
"With AlienVault you get everything in one box."
"The most valuable features of this solution are the data correlation and vulnerability assessment."
"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 most valuable features of AlienVault OSSIM are case management, ease of configuration, and investigation."
"The initial setup is straightforward."
"The threat policies of the solution are always very advanced and the best in the market. They are very persistent in terms of keeping up with security protocols."
"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
"The correlation feature is good."
"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."
"SmartConnector: Normalization parses raw logs and converts them into CEF (common event format). This is the core of the product."
"ESM has valuable features for event prediction and security analysis."
"Some of the benefits of using this solution are rapid correlation and near-time response on alerts."
"The solution has gone beyond signature-based monitoring and analysis and is AI-powered. It is good enough to cover the full range of cybersecurity services."
"The filters and the ability to do what you want are the most valuable features. There is nothing that you cannot do in this solution. It has all the features, which makes it very dynamic."
"The reports that we are from getting from ArcSight are very valuable. The reporting in ArcSight is good. Our regulators ask us for the reports on a regular basis, and we have been able to provide the required data. Its overall functionality in terms of log analysis and the speed at which it does that is also valuable. It is very quick. Whatever alerts we had configured were extremely fast. We immediately get alerts when there is unauthorized access or unknown access, or even positive access. This is where we found the difference between ArcSight and other solutions."
More OpenText Enterprise Security Manager pros
 

Cons

"It's so hard to configure and explore something new on it."
"Sometimes technical issues take very long to get resolved."
"There needs to be more support or some kind of training program so users can self-learn the system more effectively."
"The solution needs more integration with cyber intelligence systems."
"AlienVault OSSIM’s configuration and integration could be a little easier."
"The correlation engine needs to be improved."
"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."
"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."
More AlienVault OSSIM cons
"The initial setup could be more straightforward."
"They also could improve the product by integrating user and identity behavior analytics."
"When we need to consume old events, we have to wait for a long time. ArcSight should improve the database capability to reply to queries faster. It would also be interesting if they implemented network visibility. For example, they could add a feature like NetWitness with a model just for looking through the packets."
"They need to develop NetFlow appliances that can be installed in the customer network on span ports, collect NetFlow, and send it to ArcSight without relying on the devices' NetFlow capability and their position in the network."
"​In certain cases, this product does have false positives, which the company should work on."
"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."
"ArcSight ESM could improve the alerts for the storage capacities or actions."
"The biggest requirement is that there is no cloud solution for this product yet. They need to create a cloud version. It's the biggest thing they can do to make the solution better."
More OpenText Enterprise Security Manager cons
 

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 free."
"The licensing fees for the non-community edition are paid on an annual basis, and there are no costs in addition to this."
"The price of AlienVault OSSIM is too high sometimes for us to present to our customers. The price should be lower. We are on a three-year license to use the solution. We had to pay extra for the support."
"AlienVault OSSIM is an open-source solution."
"AlienVault OSSIM is expensive compared to its competitors."
"AlienVault OSSIM is free."
"The tool's licensing costs are yearly."
More AlienVault OSSIM pricing and cost advice
"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."
"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."
"Aggregation can help a lot in pushing down licensing costs."
"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.​"
"ArcSight is pretty expensive compared with its competitors. I believe that is fine as it provides value."
"Customers without a ton of resources to dedicate to deployment may be better served by a managed ArcSight service."
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
12%
Computer Software Company
11%
Financial Services Firm
8%
Manufacturing Company
8%
Marketing Services Firm
13%
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 39% 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 6% of the time
USM Anywhere vs AlienVault OSSIM Logo
USM Anywhere vs AlienVault OSSIM
Compared 6% 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 14% 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 7% 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
February 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
February 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: February 2026.
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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.