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CoreOS Clair vs Microsoft Defender for Cloud comparison

 

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

CoreOS Clair
Ranking in Container Security
31st
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
5th
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) (4th), Cloud-Native Application Protection Platforms (CNAPP) (4th), Data Security Posture Management (DSPM) (5th), Microsoft Security Suite (7th), Compliance Management (4th), Cloud Detection and Response (CDR) (3rd)
 

Mindshare comparison

As of May 2026, in the Container Security category, 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 5.5%, 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 Cloud5.5%
CoreOS Clair0.7%
Other93.8%
Container Security
 

Featured Reviews

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

"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's best feature is detection accuracy."
"CoreOS Clair can be used by organizations of any size."
"The most valuable feature is the regulatory compliance aspect, where we utilize predefined initiatives like NIST. Alert management is another useful feature. Alerts are directly integrated with our email or DevOps board for easy viewing, allowing us to identify problem areas efficiently."
"It helps you to identify the gaps in your solution and remediate them, and it produces a compliance checklist against known standards such as ISO 27001, HIPAA, iTrust, etc."
"Microsoft Defender for Cloud has made our environment more secure."
"The solution is up-to-date with the latest updates and identified threats."
"The features of Microsoft Defender for Cloud that I appreciate the most are automation and event detection."
"Provides a very good view of the entire security setup of your organization."
"No doubt it is useful as per the log analysis and threat protection analysis."
"The security policy is the most valuable feature for us. We can go into the environment settings and attach any globally recognized framework like ISO or any benchmark."
 

Cons

"An area for improvement is that CoreOS Clair doesn't provide information about the location of vulnerabilities it detects."
"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 cost is always a concern, but overall, it's not too bad because it is easy to use and pretty friendly."
"It's hard to reach someone who understands my problems. I haven't had many issues, so I haven't called them."
"When you work with it, the only problem that we're struggling with is that we have 21 different subscriptions we're trying to apply security to. It's impossible to keep everything organized."
"The solution could improve by being more intuitive and easier to use requiring less technical knowledge."
"The process of deploying Microsoft Defender for Cloud was not smooth. It was always a challenge migrating, as a lot of it involved application dependencies and what was required before being able to use Azure for those services."
"I would suggest building a single product that addresses endpoint server protection, attack surface, and everything else in one solution. That is the main disadvantage with the product. If we are incorporating some features, we end up in a situation where this solution is for the server, and that one is for the client, or this is for identity, and that is for our application. They're not bundling it. Commercially, we can charge for different licenses, but on the implementation side, it's tough to help our end-customer understand which product they're getting."
"Azure Security Center should be more easily understood by a non-technical person. It needs to be simplified and made more user-friendly for a non-technical person."
"Customizing some of the compliance requirements based on individual needs seems like the biggest area of improvement. There should be an option to turn specific controls on and off based on how your solution is configured."
 

Pricing and Cost Advice

"CoreOS Clair is open-source and free of charge."
"I'm not privy to that information, but I know it's probably close to a million dollars a year."
"The cost is fair. There aren't any costs in addition to the standard licensing fee."
"While we pay for any additional features, the pricing seems competitive, though I am not involved in the specific cost details."
"Understanding the costs of cloud services can be complicated at first. As with a lot of things in the cloud, it can be quite hard to understand the end cost, but it becomes clearer over time. Early on, the lack of transparency is a challenge. Microsoft does not tell you the cost when they launch something. It is clever marketing, and there is room for improvement there. There should be clarity from the start."
"This solution is more cost-effective than some competing products. My understanding is that it is based on the number of integrations that you have, so if you have fewer subscriptions then you pay less for the service."
"Azure Defender is definitely pricey, but their competitors cost about the same. For example, a Palo Alto solution is the same price per endpoint, but the ground strikes cost a bit more than Azure Defender. Still, it's pricey for a company like ours. Maybe well-established organizations can afford it, but it might be too costly for a startup."
"Currently, Microsoft offers only one plan at the enterprise level which is $15 per machine."
"Azure Defender is a bit pricey. The price could be lower."
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Top Industries

By visitors reading reviews
Financial Services Firm
19%
Performing Arts
13%
Government
12%
Comms Service Provider
10%
Financial Services Firm
12%
Computer Software Company
10%
Manufacturing Company
9%
Government
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business30
Midsize Enterprise13
Large Enterprise49
 

Questions from the Community

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 get CoreOS included, so you don't need to pay for the operating system separately....
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 similar to Linux and offers benefits to other Linux operating systems. One major advan...
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 across your ecosystem. It also has great remote workforce capabilities and supports a...
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 and support had no issues.
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 ingestion cost perspective. Depending on what license you choose, you might have to p...
 

Also Known As

No data available
Microsoft Azure Security Center, Azure Security Center, Microsoft ASC, Azure Defender
 

Interactive Demo

Demo not available
 

Overview

 

Sample Customers

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: April 2026.
894,738 professionals have used our research since 2012.