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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
28th
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
24th
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) (12th), Cloud Workload Protection Platforms (CWPP) (11th), Cloud Security Posture Management (CSPM) (17th), Cloud-Native Application Protection Platforms (CNAPP) (13th), Cloud Infrastructure Entitlement Management (CIEM) (4th)
 

Mindshare comparison

As of October 2025, in the Container Security category, the mindshare of CoreOS Clair is 0.6%, up from 0.4% compared to the previous year. The mindshare of Tenable Cloud Security is 1.5%, up from 1.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Container Security Market Share Distribution
ProductMarket Share (%)
Tenable Cloud Security1.5%
CoreOS Clair0.6%
Other97.9%
Container Security
 

Featured Reviews

Felipe Giffu - PeerSpot reviewer
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.
DragosCernat - PeerSpot reviewer
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."
"The product's visibility and remediation work fine for me."
"The product's deployment phase is easy."
"The solution’s vulnerability management feature has helped us identify and mitigate risks well."
"The tool alerts us on depreciating performance or deficiencies of our web application. It helps us react on time."
"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."
"The analytical and reporting capabilities are pretty straightforward and show every transaction and major attempt to attack the application in the cloud."
"Ermetic can provide super visibility for our cloud environment (we are using AWS)."
"Scanning and reporting are the most valuable features of Tenable Cloud Security"
 

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."
"The product must provide more features."
"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."
"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."
"I have faced several bug incidents with the solution"
"Due to its robust nature, the platform's adoption can be overwhelming initially. However, once organizations start using it, they tend to get used to it. I haven't had much direct interaction with the support team, but some partners have reported a desire for better support for the product."
"Ermetic needs to improve its security scanning. I would like to see more dynamic graphical forms."
"In my experience, Tenable Cloud Security is not very stable."
"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."
 

Pricing and Cost Advice

"CoreOS Clair is open-source and free of charge."
"The tool's price is good compared to other brands. The tool's subscription is for a year."
"The tool's pricing is fair."
"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
Manufacturing Company
15%
Financial Services Firm
11%
Computer Software Company
11%
Performing Arts
9%
Computer Software Company
13%
Government
11%
Financial Services Firm
10%
Manufacturing Company
8%
 

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?
I think Tenable Cloud Security could be improved with more clear licensing. What I would like to see improved with licensing is how they're used in the product. The calculations of what is consider...
What is your primary use case for Tenable Cloud Security?
My main use case for Tenable Cloud Security is managing our security compliance and security posture. I use Tenable Cloud Security for managing compliance and security posture, and we rely on the c...
 

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: September 2025.
869,566 professionals have used our research since 2012.