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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
18th
Average Rating
9.6
Reviews Sentiment
7.8
Number of Reviews
6
Ranking in other categories
Continuous Threat Exposure Management (CTEM) (2nd)
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) (2nd), 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
3rd
Average Rating
8.4
Reviews Sentiment
6.5
Number of Reviews
83
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2025, in the Vulnerability Management category, the mindshare of Zafran Security is 0.8%, up from 0.0% compared to the previous year. The mindshare of Microsoft Defender for Cloud is 5.7%, up from 4.9% compared to the previous year. The mindshare of Tenable Nessus is 8.8%, down from 13.0% 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

"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 is an excellent tool."
"We are able to see the real risk of a vulnerability on our environment with our security tools."
"Zafran has become an indispensable tool in our cybersecurity arsenal."
"We saw benefits from Zafran Security almost immediately after deploying it."
"I've seen benefits since implementing Microsoft Defender for Cloud. It's easy to manage for our large organization as an endpoint security solution. It integrates well with Office 365 and Windows 11, which is better than before. Patching, updates, and threat protection are all handled together now. Its AI features help predict threats."
"Microsoft Defender for Cloud monitors our entire cloud environment. It enables conditional access and incorporates features like number matching and single sign-on for all our cloud apps. It is great for protecting against ransomware and various security threats."
"Everything is built into Azure, and if we go for cross-cloud development with Azure Arc, we can use most of the features. While it's possible to deploy and convert third-party applications, it is difficult to maintain, whereas Azure deployments to the cloud are always easier. Also, Microsoft is a big company, so they always provide enough support, and we trust the Microsoft brand."
"The most valuable features are the monitoring of users, endpoint detection and response, and the adaptability of the AI threat intelligence engine, which quickly adapts to customizations."
"The pricing is good."
"Defender is a robust platform for dealing with many kinds of threats. We're protected from various threats, like viruses. Attacks can be easily minimized with this solution defending our infrastructure."
"The first valuable feature was the fact that it gave us a list of everything that users were surfing on the web. Having the list, we could make decisions about those sites."
"It alerts us to our vulnerabilities and ensures compliance by marking off a compliance tool checklist."
"Nessus' most valuable feature is vulnerability management because it helps to discover vulnerabilities proactively and integrates with patch management solutions so you can push patches."
"A valuable feature of the solution is that it is easy to understand."
"The scanning capabilities are most valuable when compared to Nessus."
"I find the features that are most valuable are the policies that help us identify the vulnerabilities. These policies are then used for scanning instabilities and then identifying the particular vulnerabilities."
"The most valuable feature is how it scanned and detected through its database to let us know exactly what fixes we needed to put in place for the vulnerabilities. It detects and it also gives you the way to fix it."
"Ease of reviewing scores, identifying vulnerabilities, and getting information on them."
"It gives you an unlimited IP scan."
"The most valuable feature of Tenable Nessus is vulnerability assessments. There are a lot of threats around the world and this solution is the first to come out with detection rules."
 

Cons

"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."
"The dashboarding and reporting functionality of Zafran Security is an area that definitely could use some improvements."
"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."
"Azure is a complex solution. You have so many moving parts."
"Microsoft Graph needs improvement."
"I would like to have the ability to customize executive reporting."
"From my own perspective, they just need a product that is tailored to micro-segmentation so I can configure rules for multiple systems at once and manage it."
"With the new Copilot functionality available everywhere, it is challenging to pinpoint areas for improvement. If I put in a lot of thought, I might identify things, but right now, nothing significant pops into my mind, but there is always room for more transparency, especially in pricing."
"Integration into other third-party products, particularly those from tier three vendors like ManageEngine and Hexcode, has proven difficult."
"Defender could improve how data is represented. It can be unstructured or slow to load. The recent update allowing policy grouping into control groups is beneficial, but further enhancements for speed and clarity are needed."
"Tenable Nessus application device assessment is one of the top tools. However, in the application security assessment, there are other tools that provide better, and more accurate findings."
"There is room, overall, for improvement in the way it groups the workstations and the way it detects, when the vulnerability is scanned. Even when we would run a new scan, if it was an already existing vulnerability, it wouldn't put a new date on it."
"It wasn't very clear how the scripts are running the scans. There's information about the script but it's not straightforward. The script information for each of the plugins should be available, but it doesn't give us straightforward direct information about how it was executed. That needs to be more clear."
"The user interface of Tenable Nessus feels outdated and could be more user-friendly."
"Tenable Nessus could improve by having more steady updates which will reduce the vulnerabilities."
"Vulnerability recommendations are outdated and not in line with industry standards."
"Some things in the user interface could be better. The user interface could allow more adjustments to plugins. The price could also be better."
"It would be better if they had application-level support for mobile devices. They don't have anything to scan mobile devices. Tenable Nessus doesn't have a mobile application vulnerability assessment. I also have issues with the false positive rates. The product has limited features."
 

Pricing and Cost Advice

Information not available
"Microsoft's licensing and pricing are sometimes complicated. If someone is new to Microsoft's licensing, they might have difficulty with it."
"While we pay for any additional features, the pricing seems competitive, though I am not involved in the specific cost details."
"There is a helpful cost-reducing option that allows you to integrate production subscriptions with non-production subscriptions."
"The pricing and licensing of Microsoft Defender for Cloud have been good for us. We appreciate the licensing approach based on employee count rather than a big enterprise license."
"The tool is pretty expensive."
"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."
"It has global licensing. It comes with multiple licenses since there are around 50,000 people (in our organization) who look at it."
"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."
"The price is okay. I would give it a seven out of ten, where one is cheap and ten is expensive."
"The solution is worth the cost. It's a good investment."
"There is an annual license required to use this solution."
"I rate the product's price seven or eight on a scale of one to ten, where one is low price and ten is high price."
"The price is high for the solution. There are free tools with similar functionality available. The solution cost approximately $3,500."
"Tenable Nessus is affordable."
"We paid about six thousand dollars per license."
"The cost is around $4,300 per year. Use is unlimited. You don't pay more if you want to use it for another IP."
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Top Industries

By visitors reading reviews
Computer Software Company
11%
Financial Services Firm
11%
Manufacturing Company
7%
Healthcare Company
6%
Computer Software Company
13%
Financial Services Firm
13%
Manufacturing Company
9%
Government
7%
Computer Software Company
12%
Financial Services Firm
10%
Educational Organization
10%
Manufacturing Company
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?
The current pricing of Zafran Security is fair overall. They were good to work with to accommodate our organization w...
What needs improvement with Zafran Security?
The dashboarding and reporting functionality of Zafran Security is an area that definitely could use some improvement...
What is your primary use case for Zafran Security?
Zafran Security is helping reduce the amount of critical vulnerabilities in our environments that require prompt reme...
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.
861,524 professionals have used our research since 2012.