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Microsoft Sentinel vs OpenText Enterprise Security Manager comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 28, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
6.7
Microsoft Sentinel enhances ROI with automation, boosts productivity, lowers costs, and improves security through efficient integration and faster responses.
Sentiment score
4.9
ROI from OpenText Enterprise Security Manager varies widely, influenced by threat detection, compliance benefits, and prevention of incidents.
If a customer is already using Microsoft’s ecosystem, the ROI can be positive due to seamless integration.
senior cyber security at a tech services company with 201-500 employees
Our MTTR, mean time to response, improved by forty to fifty percent. Earlier, medium-severity incidents took two to three hours to resolve. Now, after Microsoft Sentinel, it is forty to fifty-five minutes.
Cyber Security Consultant at ProTechmanize
We attribute our growth to Sentinel.
Chief Commercial Officer at defend
 

Customer Service

Sentiment score
6.5
Microsoft Sentinel support is praised for quick, knowledgeable responses, with higher satisfaction in premium plans despite some documentation challenges.
Sentiment score
5.4
OpenText Enterprise Security Manager support receives mixed reviews, with common complaints about slow resolution and inadequate expertise in complex issues.
Their solutions' integration simplifies resolving issues compared to those caused by third-party products.
IT Consultant at MAN Truck & Bus SE
Microsoft invests significantly in support, which is crucial for companies.
Director de Microsoft y Transformación Digital at Compucad
Working with a Sentinel engineer helped us tune settings effectively.
Systems Emgineer at a non-profit with 1-10 employees
If I raise a P1 or P0 ticket, the response time is often delayed by four to eight hours.
Senior Security Engineer at Valuepoint Systems
 

Scalability Issues

Sentiment score
7.7
Microsoft Sentinel offers scalable, cloud-based operations with seamless Azure integration, emphasizing elasticity and cost considerations for effective data management.
Sentiment score
5.9
OpenText Enterprise Security Manager is scalable for large deployments but faces cost challenges at the logger level.
Office 365 and Exchange are running on it, covering about 35,000 users efficiently.
IT Consultant at MAN Truck & Bus SE
There is no need to add hardware or redesign infrastructure because it is cloud-native.
Cyber Security Consultant at ProTechmanize
As our organization uses Microsoft Azure and Defender, everything grows together, and we can integrate various features seamlessly.
Systems Emgineer at a non-profit with 1-10 employees
It lacks some capabilities compared to other tools available in the market.
Senior Security Engineer at Valuepoint Systems
 

Stability Issues

Sentiment score
7.8
Microsoft Sentinel is reliable with 99.9% uptime, minor glitches, and minimal maintenance thanks to its managed service aspect.
Sentiment score
5.1
OpenText Enterprise Security Manager is stable and reliable, though performance varies with challenges in virtualization and specific components.
So far, we have not experienced any issues, and it has been stable from the beginning.
IT Consultant at MAN Truck & Bus SE
In the past two years, our team hasn't encountered any issues with the stability of Microsoft Sentinel from an operations perspective.
Project Executive at synergyc
I need to be aware of deprecated connectors as they may disconnect, but the data continues to be sent with a need for quick adaptation.
senior cyber security at a tech services company with 201-500 employees
The stability of ArcSight Enterprise Security Manager (ESM) is not very robust.
Senior Security Engineer at Valuepoint Systems
 

Room For Improvement

Users seek better integration, documentation, user-friendliness, AI, automation, and transparency in Microsoft Sentinel for improved threat management.
OpenText Enterprise Security Manager needs user interface upgrades, better integration, improved documentation, and enhancements in analytics and scalability.
Log ingestion and retention costs can grow quickly, and understanding which data source is driving cost is not always straightforward.
Cyber Security Consultant at ProTechmanize
We have some tools, such as our off-site Meraki firewalls, that have not fully integrated with Sentinel.
Systems Emgineer at a non-profit with 1-10 employees
Currently, we are happy to have a way in the middle with not so much cost, but it would be nice to have the ability to enhance the automation of workflows based on learned incidents.
IT Consultant at MAN Truck & Bus SE
The integration aspect of ArcSight Enterprise Security Manager (ESM) needs improvement.
Senior Security Engineer at Valuepoint Systems
 

Setup Cost

Microsoft Sentinel's pricing is flexible yet costly, requiring optimization and integration to maximize cost-effectiveness for data management.
OpenText Enterprise Security Manager is costly but offers robust features and scalability, with possible discounts and cost management strategies.
It has been beneficial that Microsoft Sentinel is included as part of the Microsoft package, making it more cost-effective.
Senior System Administrator at a university with 5,001-10,000 employees
Microsoft Sentinel is not a low-cost SIEM.
Cyber Security Consultant at ProTechmanize
Microsoft Sentinel offers more capabilities than Bastion, with a more intuitive experience.
Project Executive at synergyc
ArcSight Enterprise Security Manager (ESM) is very cheap compared to other tools.
Senior Security Engineer at Valuepoint Systems
 

Valuable Features

Microsoft Sentinel excels in integration, AI, scalability, automation, and user experience, with powerful threat detection and response features.
ArcSight offers advanced threat detection, robust integration, customizable dashboards, and automates event correlation for efficient security operations.
Microsoft Sentinel's ability to correlate data from multiple sources and its detection capabilities are essential.
Cost Engineer at a tech vendor with 10,001+ employees
Microsoft Sentinel has improved cost efficiency, which is one of the key areas we're able to win business against the ability to have threat intelligence.
Chief Commercial Officer at defend
Microsoft Sentinel's ability to correlate data from multiple sources enhances our threat detection capabilities beyond what is a simple data lake solution by filtering out the noise and consolidating the signal down to a meaningful level that is easier to investigate and see.
Solutions Architect at a tech vendor with 201-500 employees
The ability to interpret data is highly valued.
Senior Security Engineer at Valuepoint Systems
 

Categories and Ranking

Microsoft Sentinel
Ranking in Security Information and Event Management (SIEM)
4th
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
104
Ranking in other categories
Security Orchestration Automation and Response (SOAR) (1st), Microsoft Security Suite (6th), AI-Powered Cybersecurity Platforms (5th)
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 Microsoft Sentinel is 5.0%, down from 7.5% 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 (%)
Microsoft Sentinel5.0%
OpenText Enterprise Security Manager1.6%
Other93.4%
Security Information and Event Management (SIEM)
 

Featured Reviews

Kallamuddin Ansari - PeerSpot reviewer
Cyber Security Consultant at ProTechmanize
Centralized monitoring has improved threat response but cost control still needs refinement
Based on real operations used in our corporate IT environment, the key features include log correlation and incident view. Microsoft Sentinel's biggest strength is how it correlates multiple related alerts into a single incident. This significantly reduces alert noise and helps the SOC focus on real threats instead of isolated events. Another valuable feature is KQL-based threat hunting with Kusto Query Language. The flexibility of this language allows us to build custom hunting queries based on our environment's behavior. This is extremely useful for detecting low and slow threats or hidden threats that default rules may miss. Cloud-native scalability and stability is another important feature. Being cloud-native, Microsoft Sentinel scales well for medium to large corporate environments without infrastructure management. Stability has been solid in day-to-day production. SOAR automation using playbooks is a feature we highly recommend. Microsoft Sentinel's SOAR functionality helps automate repetitive SOC tasks like alert enrichment and notification. This saves analyst time and improves response consistency.
NM
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.
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881,082 professionals have used our research since 2012.
 

Comparison Review

VS
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…
 

Top Industries

By visitors reading reviews
Computer Software Company
14%
Financial Services Firm
10%
Manufacturing Company
9%
Government
8%
Manufacturing Company
10%
Financial Services Firm
10%
Performing Arts
9%
Computer Software Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business38
Midsize Enterprise22
Large Enterprise45
By reviewers
Company SizeCount
Small Business37
Midsize Enterprise14
Large Enterprise57
 

Questions from the Community

Is there a common threat intelligence tool that aggregates multiple threat intelligence sources?
Yes, Azure Sentinel is a SIEM on the Cloud. Multiple data sources can be uploaded and analyzed with Azure Sentinel and its Threat Hunting functionality with AI available as templates or customized ...
What is a better choice, Splunk or Azure Sentinel?
It would really depend on (1) which logs you need to ingest and (2) what are your use cases Splunk is easy for ingestion of anything, but the charge per GB/Day Indexed and it gets expensive as log ...
Which is better - Azure Sentinel or AWS Security Hub?
We like that Azure Sentinel does not require as much maintenance as legacy SIEMs that are on-premises. Azure Sentinel is auto-scaling - you will not have to worry about performance impact, you will...
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 ...
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.
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.
 

Also Known As

Azure Sentinel
Micro Focus ArcSight, HPE ArcSight, ArcSight
 

Overview

 

Sample Customers

Microsoft Sentinel is trusted by companies of all sizes including ABM, ASOS, Uniper, First West Credit Union, Avanade, and more.
Lake Health, U.S. Department of Health and Human Services, Bank AlJazira, Banca Intesa, and Obrela.
Find out what your peers are saying about Microsoft Sentinel vs. OpenText Enterprise Security Manager and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.