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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 7.2, 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
 

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 Its reliance on outdated interfaces may affect user experience in demanding settings.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: 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
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 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
ProductMarket Share (%)
AlienVault OSSIM1.9%
OpenText Enterprise Security Manager1.6%
Other96.5%
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

"You can customize the dashboards as well as the reporting."
"I recommend it due to the experience of the people running it."
"The threat alerts it gives me from time to time on harmful code within the network, or if they are generating any network traffic, are very useful."
"The initial setup is straightforward."
"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 feature is the logging capability."
"The solution has a very good open source community, and whenever we have problems, we are always able to resolve it online."
"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.""
More AlienVault OSSIM pros
"The tool is good for correlation and aggregation. We use it as a collection platform."
"We have been satisfied with the support."
"For the typical malware or intrusion, this solution assists us by identifying the symptoms based on network traffic from the application servers."
"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."
"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."
"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."
"The most valuable features of ArcSight ESM are the dashboards, ease of management for anyone, and simple for teams to provide reports related to cyber security. There are a lot of good features that are provided."
More OpenText Enterprise Security Manager pros
 

Cons

"AlienVault OSSIM’s configuration and integration could be a little easier."
"AlienVault OSSIM should improve the deployment and make it unified like the USM."
"The user interface needs to be friendlier across the board."
"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."
"When comparing AlienVault OSSIM to other solutions it looks a bit outdated. Additionally, they need to improve their integration."
"The main area where the AlienVault product was lacking around the 2018 timeframe was in its ability to scale."
"We need more dashboards and we need more customization for dashboards."
"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."
More AlienVault OSSIM cons
"ArcSight ESM is lacking cloud scalable technology."
"The visualization is not very good compared to Splunk."
"Customer service and support is our biggest challenge."
"The dashboard looks a bit cumbersome."
"Currently lacks SOAR feature."
"The tool should improve its UI. It also should make data more searchable."
"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."
"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."
More OpenText Enterprise Security Manager cons
 

Pricing and Cost Advice

"AlienVault OSSIM is expensive compared to its competitors."
"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."
"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."
"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."
"The solution is open source, so it's free to use."
More AlienVault OSSIM pricing and cost advice
"There is a license required for this solution."
"The pricing model is expensive compared to open-source alternatives."
"The pricing is great compared to others."
"We have a license to use this solution. The price of ArcSight Enterprise Security Manager is expensive."
"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."
"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."
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
Computer Software Company
13%
Comms Service Provider
12%
Financial Services Firm
9%
Manufacturing Company
8%
Financial Services Firm
11%
Manufacturing Company
10%
Computer Software Company
10%
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 52% of the time
Venusense USM vs AlienVault OSSIM Logo
Venusense USM vs AlienVault OSSIM
Compared 10% of the time
USM Anywhere vs AlienVault OSSIM Logo
USM Anywhere vs AlienVault OSSIM
Compared 7% of the time
Splunk Enterprise Security vs AlienVault OSSIM Logo
Splunk Enterprise Security vs AlienVault OSSIM
Compared 7% of the time
Elastic Security vs AlienVault OSSIM Logo
Elastic Security vs AlienVault OSSIM
Compared 4% of the time
More AlienVault OSSIM Competitors
Trellix ESM vs OpenText Enterprise Security Manager Logo
Trellix ESM vs OpenText Enterprise Security Manager
Compared 18% of the time
IBM Security QRadar vs OpenText Enterprise Security Manager Logo
IBM Security QRadar vs OpenText Enterprise Security Manager
Compared 10% of the time
SurfWatch Labs SurfWatch vs OpenText Enterprise Security Manager Logo
SurfWatch Labs SurfWatch vs OpenText Enterprise Security Manager
Compared 8% of the time
Splunk Enterprise Security vs OpenText Enterprise Security Manager Logo
Splunk Enterprise Security vs OpenText Enterprise Security Manager
Compared 7% of the time
OpenText Behavioral Signals vs OpenText Enterprise Security Manager Logo
OpenText Behavioral Signals vs OpenText Enterprise Security Manager
Compared 5% of the time
More OpenText Enterprise Security Manager Competitors
 

Product Reports

Buyer's Guide
AlienVault OSSIM
January 2026
AlienVault OSSIM reportDownload AlienVault OSSIM product report
Buyer's Guide
OpenText Enterprise Security Manager
December 2025
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
December 2025
Free Report: AlienVault OSSIM vs. OpenText Enterprise Security Manager
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