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 7.2, while OpenText is ranked #21 with an average rating of 6.8. AT&T holds a 1.9% mindshare in SIEM, compared to OpenText’s 1.6% 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

4,311 Views
4,225 Comparison Views

80% willing to recommend

OpenText Enterprise Securit...

Read 98 OpenText Enterprise Security Manager reviews

2,954 Views
2,865 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 Its reliance on outdated interfaces may affect user experience in demanding settings.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)

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)

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 January 2026, in the Security Information and Event Management (SIEM) category, the mindshare of AlienVault OSSIM is 1.9%, down from 4.3% compared to the previous year. The mindshare of OpenText Enterprise Security Manager is 1.6%, 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	1.9%
OpenText Enterprise Security Manager	1.6%
Other	96.5%

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.

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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

"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."

"I recommend it due to the experience of the people running it."

"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 initial setup is straightforward."

"The product is easy to use."

"The solution is free to use."

"You can customize the dashboards as well as the reporting."

"The paid version of the solution has reporting and better scalability options."

More AlienVault OSSIM pros

"ArcSight ESM allows us to find if someone is doing an administrative operation at inappropriate times of day or trying to do something they're not allowed to."

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

"Feature-rich solution which provides better network visibility for improved security"

"The user interfaces are quite good and speedy."

"It has absolutely improved the efficiency of our security team. We use it internally as well. It is such a powerful tool that our internal security team became a customer of our ArcSight managed service."

"The webpage algorithm is the most valuable feature because it was the fastest feature for searching the logs, events, and correlation."

"We have been satisfied with the support."

"What I found most valuable in ArcSight Enterprise Security Manager (ESM) is its good integration with third-party products. The solution also has good core capabilities."

More OpenText Enterprise Security Manager pros

Cons

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

"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."

"AlienVault OSSIM failed to provide our company a full insight, while also giving out a lot of false positives."

"The initial setup was a bit complex. You've got to do a lot of reading. It's not an intuitive implementation."

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

"The incidence reporting could be better."

"AlienVault OSSIM is costly."

More AlienVault OSSIM cons

"Deployment typology could be improved. Difficult to scale across all the different lines of businesses."

"It would be nice if the interface were more user-friendly, with, for example, a minimal number of tabs to navigate."

"I faced some problems implementing certain attacks, which was my biggest concern. The visualization wasn't very good, and I couldn't create good monitoring dashboards."

"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."

"The customer experience could be improved."

"We would like the ability to easily identify either unused resources or those that are being used sub-optimally."

"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."

More OpenText Enterprise Security Manager cons

Pricing and Cost Advice

"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."

"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."

"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."

"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."

"The tool's licensing costs are yearly."

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

"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 OSSIM is an open-source solution."

More AlienVault OSSIM pricing and cost advice

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

"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."

"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."

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

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

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

"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

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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

Financial Services Firm

10%

Manufacturing Company

10%

Performing Arts

Computer Software Company

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 48% of the time

Venusense USM vs AlienVault OSSIM

Compared 9% of the time

USM Anywhere vs AlienVault OSSIM

Compared 7% of the time

Splunk Enterprise Security 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 17% of the time

IBM Security QRadar vs OpenText Enterprise Security Manager

Compared 10% of the time

SurfWatch Labs SurfWatch vs OpenText Enterprise Security Manager

Compared 8% of the time

Splunk Enterprise Security vs OpenText Enterprise Security Manager

Compared 7% 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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