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CoreOS Clair vs Microsoft Defender for Cloud comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jan 25, 2026

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

Qualys TotalCloud
Sponsored
Ranking in Container Security
11th
Average Rating
8.6
Reviews Sentiment
7.3
Number of Reviews
39
Ranking in other categories
Vulnerability Management (11th), Cloud Workload Protection Platforms (CWPP) (7th), Cloud Security Posture Management (CSPM) (8th), SaaS Security Posture Management (SSPM) (1st), Cloud-Native Application Protection Platforms (CNAPP) (6th)
CoreOS Clair
Ranking in Container Security
32nd
Average Rating
8.6
Reviews Sentiment
7.6
Number of Reviews
2
Ranking in other categories
No ranking in other categories
Microsoft Defender for Cloud
Ranking in Container Security
4th
Average Rating
8.0
Reviews Sentiment
6.9
Number of Reviews
89
Ranking in other categories
Vulnerability Management (5th), Container Management (6th), Cloud Workload Protection Platforms (CWPP) (1st), Cloud Security Posture Management (CSPM) (3rd), Cloud-Native Application Protection Platforms (CNAPP) (4th), Data Security Posture Management (DSPM) (4th), Microsoft Security Suite (7th), Compliance Management (4th), Cloud Detection and Response (CDR) (3rd)
 

Mindshare comparison

As of July 2026, in the Container Security category, the mindshare of Qualys TotalCloud is 1.5%, up from 0.9% compared to the previous year. The mindshare of CoreOS Clair is 0.7%, up from 0.5% compared to the previous year. The mindshare of Microsoft Defender for Cloud is 5.2%, down from 6.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Container Security Mindshare Distribution
ProductMindshare (%)
Microsoft Defender for Cloud5.2%
Qualys TotalCloud1.5%
CoreOS Clair0.7%
Other92.6%
Container Security
 

Featured Reviews

RO
IT Security Expert at Alior Bank S.A.
Unified risk scoring has improved our cloud visibility and simplifies remediation priorities
Qualys TotalCloud provides unified vulnerability and threat assessment across both IAS and SaaS. This solution provides a single prioritized view of risk, which helps reduce the work I would have to do. We are no longer based on CVSS; we are based on Qualys risk scoring, which is based on CVSS plus internal findings made by Qualys, and then assigns its own score. The TruRisk insight feature has found a small number of assets with high vulnerability scores, though I am cautious since some information is classified. Qualys TotalCloud has positively impacted our bank's performance, and we have definitely seen benefits after implementing this solution.
Felipe Giffu - PeerSpot reviewer
Red Hat Solution Architect at Seprol Computadores e Sistemas
An operational system, similar to Linux where you can run your applications inside containers
With CoreOS, you can run your applications inside containers. For example, if you have an application that needs to run on Linux, you can create and install a container. However, it's important to note that you don't install CoreOS inside a container; CoreOS is the host operating system that manages containers. When you mentioned using Nacula as part of your CI/CD pipeline, it means your application is deployed and managed automatically through the CI/CD process. Containers are used to deploy your application within this pipeline, but CoreOS does not run inside these containers. Instead, CoreOS is the base operating system that supports and manages these containers.
RW
Head Of IT at Cirrus Response
Cloud security has cut investigation time and now reveals threats faster but needs simpler oversight
When deploying AI applications, my key security concerns with Microsoft Defender for Cloud are data loss, leakage of data, and guardrails around the actual AI, and I am hoping that this is going to help me put those guardrails in place and identify data exfiltration. Microsoft Defender for Cloud has not helped me manage and secure multi-cloud environments, as we are 100 percent Microsoft and have not really got it in any other environment at all. I am not yet using the unified AI-powered security feature offered by Microsoft Defender for Cloud, but that is coming. I am not yet using the integrated XDR feature of Microsoft Defender for Cloud, but that is coming. I am not yet utilizing the GenAI threat protection features of Microsoft Defender for Cloud. That is also coming and a lot of that will come from learning it here. I have enabled the agentless scanning in my cloud environment with Microsoft Defender for Cloud. Assessing the impact on my workload protection without needing to install agents with Microsoft Defender for Cloud makes it a lot easier, but it also identifies a lot more, which puts more load on me sometimes. I would advise another organization considering Microsoft Defender for Cloud that it is the most logical route to follow if their whole ecosystem is Microsoft. It is easy to implement and it is very self-explanatory when doing it, making sense to just follow the steps as it is too simple, really. I would rate this review a 7.5 out of 10.

Quotes from Members

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

Pros

"Qualys TotalCloud has significantly reduced our workload in terms of managing risks, helping us to be more efficient and save substantial resources."
"Vulnerability and threat detection and assessment of the criticality of the vulnerabilities exposed are most valuable."
"The most valuable feature of Qualys TotalCloud is the visibility it provides."
"Qualys TotalCloud has significantly improved our organization by automating our reporting processes, reducing the time spent on report creation from two hours to less than fifteen to twenty minutes."
"In my opinion, this is the best tool."
"Generally, Qualys is very good at detections, whether on cloud or on-prem, and the agent allows deployment on both infrastructures, providing continuous monitoring of your assets, which is a key selling point for us."
"Its dashboards are brilliant. It provides in-depth insights."
"Qualys TotalCloud provides a single, prioritized view of risk, reducing the workload associated with consolidating multiple sources for risk prioritization."
"With CoreOS, you can run your applications inside containers. For example, if you have an application that needs to run on Linux, you can create and install a container. However, it's important to note that you don't install CoreOS inside a container; CoreOS is the host operating system that manages containers."
"CoreOS Clair can be used by organizations of any size."
"CoreOS Clair's best feature is detection accuracy."
"Having the ability to do what we could not before, such as gaining visibility and securing our full estate, is crucial."
"We can create alerts that trigger if there is any malicious activity happening in the workflow and these alerts can be retrieved using the query language."
"If you are a Microsoft organization and most of your organization uses Microsoft, Microsoft Defender for Cloud will be the best approach as it provides the easiest implementation to the most robust solution for a Microsoft suite."
"Most importantly, it's an integrated solution. We not only have Defender for Cloud, but we also have Defender for Endpoint, Defender for Office 365, and Defender for Identity. It's an integrated, holistic solution."
"I find Microsoft Defender for Cloud's KQL very flexible and powerful. It's really easy to search through with KQL queries to find the security breaches and incidents and to track down the breach itself."
"It isn't a highly complex solution. It's something that a lot of analysts can use. Defender gives you a broad overview of what's happening in your environment, and it's a great solution if you're a Microsoft shop."
"With respect to improving our security posture, it helps us to understand where we are in terms of compliance. We can easily know when we are below the standard because of the scores it calculates."
"This is a platform as a service provided by Azure. We don't need to install or maintain Azure Security Center. It is a ready-made service available in Azure. This is one of the main things that we like. If you look at similar tools, we have to install, maintain, and update services. Whereas, Azure Security Center manages what we are using. This is a good feature that has helped us a lot."
 

Cons

"Areas that need improvement in every solution include the remediation part. The remediation steps should be simple enough for everyone to understand."
"It has been working very well, but it would be helpful if the dashboard could generate reports tailored to specific compliance needs. For example, in India, we have to comply with RBI and SEBI guidelines. It w"
"The cloud licensing unit system is unclear, especially since "units" aren't well-defined."
"The response part of the Cloud Detection and Response (CDR) module can be improved."
"I sometimes have difficulty detecting or uninstalling certain versions of applications, which I have to do manually."
"Although TotalCloud is a helpful tool, some of its advanced features are still under development."
"The support process is inefficient due to the excessive number of replies required when submitting tickets."
"A feature improvement could be the inclusion of Windows OS support for container security, as it is currently only supported for Linux."
"It can be improved in its support response. They usually take up to seven days to resolve the issue."
"An area for improvement is that CoreOS Clair doesn't provide information about the location of vulnerabilities it detects."
"The pricing could be improved, as it is somewhat high for smaller companies."
"Microsoft has much room for improvement regarding the support for Microsoft Defender for Cloud. Their competitors are much better regarding support."
"While we are satisfied with Defender for Cloud's features, an AI enhancement could potentially provide better advice and adapt more effectively to our environment."
"There are challenges with the licensing policies, which are quite complicated."
"The pricing is very difficult because every type of Defender for Cloud has its own metrics and pricing."
"The remediation process could be improved."
"Microsoft Defender for Cloud is not compatible with Linux machines."
"Although Microsoft Defender for Cloud is based on security, I wish it went beyond providing assessments, reports, and generic steps. More detailed procedures would be helpful, especially for lower-level support staff."
 

Pricing and Cost Advice

"Qualys TotalCloud is cost-efficient and was selected for its value compared to other products."
"Qualys TotalCloud offers competitive pricing given its comprehensive suite of features, including integration, assessment, remediation, and detection capabilities, all within a single platform."
"Qualys TotalCloud offers good pricing that is affordable and competitive with the market. Our partnership also provides us with additional benefits."
"TotalCloud's price is about right where I would expect it to be."
"The pricing for TotalCloud is attractive and competitive in the market. Given the features, especially the dashboard, I have no concerns regarding pricing."
"The pricing is comparable. It is built into our other product, so I cannot piecemeal it. It is a part of our subscription."
"Its price seems higher compared to other tools, but it is worth it. If they could adjust the pricing and make it comparable with other tools, that would be great."
"Qualys TotalCloud is expensive."
"CoreOS Clair is open-source and free of charge."
"The cost is fair. There aren't any costs in addition to the standard licensing fee."
"Azure Defender is a bit pricey. The price could be lower."
"The pricing is very difficult because every type of Defender for Cloud has its own metrics and pricing. If you have Cloud for Key Vault, the pricing is different than it is for storage. Every type has its own pricing list and rules."
"We are using the free version of the Azure Security Center."
"I rate Microsoft Defender a three out of ten for affordability. The price could be a little lower."
"Its pricing is a little bit high in terms of Azure Security Center, but the good thing is that we don't need to maintain and deploy it. So, while the pricing is high, it is native to Azure which is why we prefer using this tool."
"Defender for Cloud is pretty costly for a single line. It's incredibly high to pay monthly for security per server. The cost is considerable for an enterprise with 500-plus virtual machines, and the monthly bill can spike."
"I am not involved in this area. However, I believe its price is okay because even small customers are using Azure Security Center. I don't think it is very expensive."
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Top Industries

By visitors reading reviews
Manufacturing Company
17%
Financial Services Firm
14%
Construction Company
8%
Comms Service Provider
7%
Financial Services Firm
18%
Performing Arts
13%
Government
11%
Comms Service Provider
9%
Financial Services Firm
12%
Computer Software Company
10%
Manufacturing Company
9%
Government
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise4
Large Enterprise29
No data available
By reviewers
Company SizeCount
Small Business31
Midsize Enterprise12
Large Enterprise49
 

Questions from the Community

What needs improvement with Qualys TotalCloud?
Areas that need improvement in every solution include the remediation part. The remediation steps should be simple en...
What is your primary use case for Qualys TotalCloud?
Our use case involves the assets that we have under cloud, the assets exposed to the internet, and the internal appli...
What is your experience regarding pricing and costs for CoreOS Clair?
If you work with CoreOS or OpenShift, you don't need to pay for CoreOS separately. When you pay for OpenShift, you ge...
What needs improvement with CoreOS Clair?
It can be improved in its support response. They usually take up to seven days to resolve the issue.
What is your primary use case for CoreOS Clair?
We use the tool to manage and secure the event file system. CoreOS Clair is an operational system that is very simila...
How is Prisma Cloud vs Azure Security Center for security?
Azure Security Center is very easy to use, integrates well, and gives very good visibility on what is happening acros...
What is your experience regarding pricing and costs for Microsoft Defender for Cloud?
My experience with pricing, setup costs, and licensing was that the license cost was the only consideration. Setup an...
What needs improvement with Microsoft Defender for Cloud?
To improve Microsoft Defender for Cloud, I think pricing-wise, the license price is a little bit higher from an inges...
 

Also Known As

Qualys TotalCloud with FlexScan
No data available
Microsoft Azure Security Center, Azure Security Center, Microsoft ASC, Azure Defender
 

Interactive Demo

Demo not available
Demo not available
 

Overview

 

Sample Customers

Information Not Available
eBay, Veritas, Verizon, SalesForce
Microsoft Defender for Cloud is trusted by companies such as ASOS, Vatenfall, SWC Technology Partners, and more.
Find out what your peers are saying about CoreOS Clair vs. Microsoft Defender for Cloud and other solutions. Updated: June 2026.
902,988 professionals have used our research since 2012.