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CoreOS Clair vs Tenable Cloud Security comparison

 

Comparison Buyer's Guide

Executive Summary

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
29th
Average Rating
8.6
Reviews Sentiment
7.6
Number of Reviews
2
Ranking in other categories
No ranking in other categories
Tenable Cloud Security
Ranking in Container Security
23rd
Average Rating
8.4
Reviews Sentiment
6.5
Number of Reviews
12
Ranking in other categories
Identity and Access Management as a Service (IDaaS) (IAMaaS) (13th), Cloud Workload Protection Platforms (CWPP) (12th), Cloud Security Posture Management (CSPM) (17th), Cloud-Native Application Protection Platforms (CNAPP) (13th), Cloud Infrastructure Entitlement Management (CIEM) (4th)
 

Mindshare comparison

As of January 2026, in the Container Security category, the mindshare of CoreOS Clair is 0.7%, up from 0.4% compared to the previous year. The mindshare of Tenable Cloud Security is 1.7%, up from 1.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Container Security Market Share Distribution
ProductMarket Share (%)
Tenable Cloud Security1.7%
CoreOS Clair0.7%
Other97.6%
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.
CD
Information Security Architect at WSP
Has significantly improved proactive monitoring through automated asset discovery and seamless integration with cloud environments
Making the system smarter would be beneficial. Adding modules for integration with AWS and Azure would be helpful. Adding capabilities for the scanner to automatically pick up changes and add assets automatically would be valuable. When discussing a big company, it is mandatory to have tools that will assist us rather than waiting for manual input to add hosts. Adding assets manually is prone to mistakes. Humans might forget to add an asset or make errors when adding multiple assets. Taking the human element out of the context and making it more streamlined is the future for security. The human should be involved where expertise is needed, such as analysis and decision-making. Currently, with resource constraints, we need tools to collect and aggregate data, eliminate false positives as much as possible, and present relevant information to employees for action.

Quotes from Members

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

Pros

"CoreOS Clair's best feature is detection accuracy."
"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."
"If you have multi-cloud tenancy using AWS and Azure, you can have a single dashboard where you can onboard all the cloud infrastructure and have visibility into it."
"The key benefit lies in having the largest and most up-to-date database. When it comes to using any Tenable product, it excels in finding vulnerabilities and providing analytics."
"The tool alerts us on depreciating performance or deficiencies of our web application. It helps us react on time."
"Scanning and reporting are the most valuable features of Tenable Cloud Security"
"Tenable Cloud Security excels in vulnerability detection, one of its strongest features. Another valuable feature is software composition analysis, which highlights and automates the detection of security flaws. Additionally, their knowledge base is excellent; if anything goes wrong, they provide clear guidance on what needs to be done to address specific vulnerabilities."
"The solution’s vulnerability management feature has helped us identify and mitigate risks well."
"The analytical and reporting capabilities are pretty straightforward and show every transaction and major attempt to attack the application in the cloud."
"Element is precisely what we needed for close to real-time external surface monitoring, and the automatic integration capabilities, particularly with DNS, Azure, and AWS, are extremely valuable."
 

Cons

"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."
"We still maintain Tenable Cloud Security but have reduced the number of licenses. We now use it occasionally to validate specific items rather than monitoring the entire surface, for which we use Element."
"If Tenable Cloud Security offers a complete Cnapp solution with CWP, CIEM, and Waap security, it will be able to compete with other competitors."
"There is a need for the support team to improve their response time since it is one of the areas where the product's technical team has certain shortcomings."
"I do think there might be room for more integrations. This could allow for further customization and flexibility, essentially offering different functionality options to accommodate various budgets."
"I didn't find anything that wasn't useful or needed to be added."
"The product must provide more features."
"In my experience, Tenable Cloud Security is not very stable."
"I have faced several bug incidents with the solution"
 

Pricing and Cost Advice

"CoreOS Clair is open-source and free of charge."
"The tool's pricing is fair."
"The tool's price is good compared to other brands. The tool's subscription is for a year."
"There is a need to opt for a subscription-based pricing model to use Tenable Cloud Security. I rate the product price an eight on a scale of one to ten, where one is low price and ten is high price."
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Top Industries

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

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise2
Large Enterprise5
 

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...
What do you like most about Tenable Cloud Security?
The solution’s vulnerability management feature has helped us identify and mitigate risks well.
What needs improvement with Tenable Cloud Security?
Making the system smarter would be beneficial. Adding modules for integration with AWS and Azure would be helpful. Adding capabilities for the scanner to automatically pick up changes and add asset...
What is your primary use case for Tenable Cloud Security?
We had other solutions that we used. One solution was that we did not have something exactly similar to what Element is doing. For example, we were using Bitsight, Evelin, and also Tenable Cloud Se...
 

Also Known As

No data available
Ermetic, Ermetic Identity Governance for AWS
 

Overview

 

Sample Customers

eBay, Veritas, Verizon, SalesForce
Tyler Technologies, Bilfinger, BarkBox, MongoDB, airSlate, Adama, Latch, Cloudinary, Riskified, AppsFlyer, IntelyCare, Aidoc, 42Dot, and more.
Find out what your peers are saying about CoreOS Clair vs. Tenable Cloud Security and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.