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Microsoft Defender for Cloud vs Tenable Nessus comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jul 13, 2025

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

Zafran Security
Sponsored
Ranking in Vulnerability Management
16th
Average Rating
9.6
Reviews Sentiment
7.8
Number of Reviews
6
Ranking in other categories
Continuous Threat Exposure Management (CTEM) (1st)
Microsoft Defender for Cloud
Ranking in Vulnerability Management
7th
Average Rating
8.0
Reviews Sentiment
7.0
Number of Reviews
78
Ranking in other categories
Container Management (8th), Container Security (7th), 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 (5th)
Tenable Nessus
Ranking in Vulnerability Management
1st
Average Rating
8.4
Reviews Sentiment
6.1
Number of Reviews
85
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2025, in the Vulnerability Management category, the mindshare of Zafran Security is 0.9%, up from 0.0% compared to the previous year. The mindshare of Microsoft Defender for Cloud is 5.5%, up from 5.2% compared to the previous year. The mindshare of Tenable Nessus is 8.4%, down from 12.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Vulnerability Management
 

Featured Reviews

Israel Cavazos Landini - PeerSpot reviewer
Weekly insights and risk analysis facilitate informed security decisions
I appreciate the weekly insights Zafran provides, which include critical topics for networks and IT security, allowing us to evaluate which insights apply to our environment. The organization score feature is valuable to keep the leadership team updated on how our infrastructure fares security-wise. The applicable risk level versus base risk level feature is beneficial because prior to Zafran, we only used the base risk level, but now understand that risk depends on the asset itself. Zafran is an excellent tool.
Vibhor Goel - PeerSpot reviewer
A single tool for complete visibility and addressing security gaps
Currently, issues are structured in Microsoft Defender for Cloud at severity levels of high, critical, or warning, but these severity levels are not always right. For example, Microsoft might consider a port being open as critical, but that might not be the case for our company. Similarly, it might suggest closing some management ports, but you might need them to be able to log in, so the severity levels for certain things can be improved. Even though Microsoft Defender for Cloud provides a way to temporarily disable certain alerts or notifications without affecting our security score, it would be better to have more granularized control over these recommendations. Currently, we cannot even disable certain alerts or notifications. There should be an automated mechanism to design Azure policies based on the recommendations, possibly with AI integration. Instead of an engineer having to write a policy to fix security gaps, which is very time-consuming, there should be an inbuilt capability to auto-remediate everything and have proper control in place. Additionally, enabling Defender for Cloud at the resource group level, rather than only at the subscription level, would be beneficial.
HarshBhardiya - PeerSpot reviewer
Provided increased visibility across the organization's servers
The user interface of Tenable Nessus feels outdated and could be more user-friendly. Additionally, the documentation is not well-organized, which can be confusing when searching for solutions or specific information related to Tenable Nessus Professional. The reporting feature could be improved by allowing users to create their own templates instead of relying on predefined ones.

Quotes from Members

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

Pros

"Zafran is an excellent tool."
"We saw benefits from Zafran Security almost immediately after deploying it."
"We are able to see the real risk of a vulnerability on our environment with our security tools."
"Overall, we have seen about eighty-seven percent reduction of the number of vulnerabilities that require urgency to remediate, specifically the number of criticals."
"Zafran has become an indispensable tool in our cybersecurity arsenal."
"The valuable features include the ability to manage devices and the fact that Defender can replace other security tools like SCCM."
"Defender for Cloud provides a prioritized list of remediations for security issues, reducing risk and improving security operations."
"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."
"The solution's robust security posture is the most valuable feature."
"The most valuable feature of Microsoft Defender for Cloud is its ability to assess an environment and give us a clear idea of what security components are lacking and which are not."
"The entire Defender Suite is tightly coupled, integrated, and collaborative."
"The most valuable feature is the regulatory compliance aspect, where we utilize predefined initiatives like NIST."
"Microsoft Defender for Cloud helps in improving our overall security posture. We have a nice overview of what is missing where and what can be improved."
"Quick assessments, compliance scores, and results are provided without having to do agents."
"Once you get past the initial implementation, the solution is very stable."
"The scanning and reporting features are the most valuable aspects of Tenable Nessus."
"The ease of use is the primary valuable feature. This specific version is very straightforward. I like the ability to modify it and configure it based on the different policies."
"Overall Zoom is a good solution."
"A valuable feature of the solution is that it is easy to understand."
"The solution is very stable."
"The most valuable feature of Tenable Nessus is website scanning."
 

Cons

"The dashboarding and reporting functionality of Zafran Security is an area that definitely could use some improvements."
"I think the ability to have some enhanced reporting capabilities is something they can improve on, as they have good reports but we have asked for some specific reporting enhancements."
"Initially, we were somewhat concerned about the scalability of Zafran due to our large asset count and the substantial amount of information we needed to process."
"We haven't experienced issues with Microsoft Defender for Cloud for our company size of about five hundred people. However, I've heard there might be issues with scalability for larger enterprises."
"The pricing could be better."
"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."
"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."
"One of the main challenges that we have been facing with Azure Security Center is the cost. The costs are really a complex calculation, e.g., to calculate the monthly costs. Azure is calculating on an hourly basis for use of the resource. Because of this, we found it really complex to promote what will be our costs for the next couple of months. I think if Azure could reduce the complex calculation and come up with straightforward cost mapping that would be very useful from a product point of view."
"From a compliance standpoint, they can include some more metrics and some specific compliances such as GDPR."
"The solution could improve by being more intuitive and easier to use requiring less technical knowledge."
"The user interface of Microsoft Defender for Cloud, like many Microsoft portals, undergoes frequent changes and feature relocation."
"In Nessus Professional, the main drawback was that we could have a single-user login password. So it could be better in terms of security."
"Tenable Nessus could improve reporting and information sharing. It would be helpful if we could share the reports and have a little bit better flexibility in the reporting of the data."
"I would like to see more on the automation side."
"I think the reporting templates could be improved with Tenable Nessus."
"There is room for improvement in finishing the transition to the cloud. We'd like to see them keep on improving the Tenable.io product, so that we can migrate to it entirely, instead of having to keep the Tenable.sc on-prem product."
"The features are limited when it comes to scanning network devices for vulnerabilities."
"Pricing is one of the most important features, and it is something that they can improve on."
"They could make their reporting a little better."
 

Pricing and Cost Advice

Information not available
"We only use the free tier, so we haven't faced any pricing, setup costs, or licensing challenges."
"While we pay for any additional features, the pricing seems competitive, though I am not involved in the specific cost details."
"The cost of the license is based on the subscriptions that you have."
"This is a worldwide service and depending on the country, there will be different prices."
"Microsoft Defender for Cloud is pricey, especially for Kubernetes clusters."
"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."
"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."
"There are improvements that have to be made to the licensing. Currently, for servers, it has to be done by grouping the servers on a single subscription... We don't have an option whereby, if all those resources are in one subscription, we can have each of the individual servers subject to different planning."
"I think the price is fairly affordable. It provides a license that is fair."
"Nessus Manager is not an expensive product. It has its limitations, but the pricing reflects that. We have a yearly subscription."
"The price of Tenable Nessus is too expensive for each service center."
"We have a subscription, the licensing fees are paid yearly, and I am using the latest version."
"The is a free version of Tenable Nessus available."
"The newer tools are quite pricey. There is a case of some fine tuning that can be done in terms of licensing. The IP based licensing that is offered makes the tool very expensive. If they want the IT industry to adopt it, the price should be looked at."
"The price is reasonable."
"In general, it is extremely expensive."
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Top Industries

By visitors reading reviews
Financial Services Firm
10%
Computer Software Company
10%
Manufacturing Company
8%
Healthcare Company
5%
Computer Software Company
13%
Financial Services Firm
13%
Manufacturing Company
9%
Government
7%
Computer Software Company
12%
Financial Services Firm
11%
Manufacturing Company
10%
Government
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What is your experience regarding pricing and costs for Zafran Security?
Since we stood Zafran Security up in our private cloud, we handle the maintenance on our side. As we opted not to use...
What needs improvement with Zafran Security?
In terms of areas for improvement, Zafran Security is doing a really great job as a new and emerging company. Oftenti...
What is your primary use case for Zafran Security?
My use cases for Zafran Security revolve around two primary areas. One is around vulnerability management and priorit...
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 do you like most about Microsoft Defender for Cloud?
The entire Defender Suite is tightly coupled, integrated, and collaborative.
How would you choose between Rapid7 InsightVM and Tenable Nessus?
You have full visibility across cloud, network, virtual, and containerized infrastructures with Rapid7 Insight VM. Yo...
What's the difference between Tenable Nessus and Tenable.io Vulnerability Management?
Tenable Nessus is a vulnerability assessment solution that is both easy to deploy and easy to manage. The design of ...
What do you like most about Tenable Nessus?
We have around 500 virtual machines. Therefore, we conduct monthly scans and open tickets for our developers to addre...
 

Also Known As

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

Interactive Demo

Demo not available
Demo not available
 

Overview

 

Sample Customers

Information Not Available
Microsoft Defender for Cloud is trusted by companies such as ASOS, Vatenfall, SWC Technology Partners, and more.
Bitbrains, Tesla, Just Eat, Crosskey Banking Solutions, Covenant Health, Youngstown State University
Find out what your peers are saying about Microsoft Defender for Cloud vs. Tenable Nessus and other solutions. Updated: July 2025.
865,384 professionals have used our research since 2012.