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Microsoft Defender for Cloud vs Tenable Nessus 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:
 

ROI

Sentiment score
6.9
Microsoft Defender for Cloud boosts security and efficiency, integrates with Azure, reduces costs, prevents breaches, and offers proactive defense.
Sentiment score
2.5
Tenable Nessus excels in vulnerability management, boosting security, offering cost-efficiency, and enhancing threat detection and patch deployment.
Defender proactively indexes and analyzes documents, identifying potential threats even when inactive, enhancing preventative security.
Endpoint management at a government with 10,001+ employees
Identifying potential vulnerabilities has helped us avoid costly data losses.
Manager at CBTS
Compared to not having Microsoft Defender for Cloud in place, we definitely saw an advantage by not having downtime due to a security threat.
Principal Microsoft Consultant at MicroAge
 

Customer Service

Sentiment score
6.3
Microsoft Defender for Cloud support is responsive at higher levels, but experiences vary with mixed satisfaction due to delays.
Sentiment score
3.8
Tenable Nessus support is knowledgeable and efficient but sometimes delayed, with high overall satisfaction despite occasional response speed issues.
Since security is critical, we prefer a quicker response time.
Manager at CBTS
The support team was very responsive to queries.
Programme Manager- Cyber Fusion- Group CISO at a financial services firm with 10,001+ employees
They understand their product, but much like us, they struggle with the finer details, especially with new features.
Endpoint management at a government with 10,001+ employees
We received support within one to three hours.
CIO at a insurance company with 201-500 employees
Whenever any issue arises, we contact the support, and they are always there for us.
Information security engineer at Cyberisk
The technical support is good yet could improve in terms of response time.
SOC Engineer at a outsourcing company with 10,001+ employees
 

Scalability Issues

Sentiment score
7.4
Microsoft Defender for Cloud is scalable, integrating across environments effortlessly, suitable for all enterprise sizes with flexible performance.
Sentiment score
5.6
Tenable Nessus is scalable, adaptable, and well-regarded, though larger environments may face server and cloud storage challenges.
As we have reduced our on-premises infrastructure, it is about how we can migrate workloads to the cloud to make it easier, and then having everything fully encompassed and secured within that area makes it much easier for us to scale as needed and grow.
Principal Microsoft Consultant at MicroAge
We are using infrastructure as a code, so we do not have any scalability issues with Microsoft Defender for Cloud implementation because our cloud automatically does it.
Senior Cloud Platform Engineer at Deutsche Börse
It has multiple licenses and features, covering infrastructures from a hundred to five hundred virtual machines, without any issues.
Snr. Infrastructure Architect (Data Centre) at LogicEra
Whether managing 50 servers today or 500 tomorrow, performance or capacity are not hindered.
SOC Engineer at a outsourcing company with 10,001+ employees
Tenable Nessus is definitely scalable, especially for license formats designed for scalability.
Security Center Coordinator at a comms service provider with 1-10 employees
 

Stability Issues

Sentiment score
7.5
Microsoft Defender for Cloud is stable and reliable, with minimal issues mainly during updates, ensuring strong user satisfaction.
Sentiment score
5.7
Tenable Nessus is stable with reliable performance, minor update issues, occasional false positives, and rare network interference.
Defender's stability has been flawless for us.
Engineer at a computer software company with 201-500 employees
Microsoft Defender for Cloud is very stable.
Cloud architect at a tech vendor with 1,001-5,000 employees
Microsoft sometimes changes settings or configurations without transparency.
Senior Cloud Platform Engineer at Deutsche Börse
We have not encountered any issues with missing network items or errors in API and webhook interactions.
SOC Engineer at a outsourcing company with 10,001+ employees
The stability of Tenable Nessus is extraordinary.
Founder at Cipheroot
 

Room For Improvement

Microsoft Defender for Cloud users seek better automation, clarity, integration, AI features, and comprehensive analytics for improved security management.
Tenable Nessus needs improved reporting, integration, and user interface, along with expanded capabilities, flexible pricing, and better documentation.
Microsoft, in general, could significantly improve its communication and support.
Endpoint management at a government with 10,001+ employees
It would be beneficial to streamline recommendations to avoid unnecessary alerts and to refine the severity of alerts based on specific environments or environmental attributes.
Works at Coca-Cola HBC
The artificial intelligence features could be expanded to allow the system to autonomously manage security issues without needing intervention from admins.
Cloud Consultant at i-Community AG
This is Tenable's property. They want to sell Tenable Security Center, and they closed all the API capability for Tenable Nessus Professional.
Co-Founder at RSU Consultancy
The documentation is not well-organized, which can be confusing when searching for solutions or specific information related to Tenable Nessus Professional.
SOC Engineer at a outsourcing company with 10,001+ employees
The product's pricing has roughly tripled within the last couple of years, making us reconsider renewing the license for the scanner.
Security Center Coordinator at a comms service provider with 1-10 employees
 

Setup Cost

Microsoft Defender for Cloud is scalable, offering free and paid versions with costs averaging $15 monthly per server.
Enterprise evaluations praise Tenable Nessus for competitive pricing, though licensing flexibility issues may increase costs for larger networks.
Security has essentially no cost when compared to the cost of a breach.
Director, Cloud and Modern Workplace at Informanix Technology Group
Every time we consider expanding usage, we carefully evaluate the necessity due to cost concerns.
Programme Manager- Cyber Fusion- Group CISO at a financial services firm with 10,001+ employees
We appreciate the licensing approach based on employee count rather than a big enterprise license.
Manager, Microsoft Technology Alliance at Silverfort
The pricing for Tenable Nessus has increased significantly, tripling over the last few years.
Security Center Coordinator at a comms service provider with 1-10 employees
Tenable Nessus's pricing is adequate if it is fully utilized.
SOC Engineer at a outsourcing company with 10,001+ employees
My experience with the pricing, setup cost, and licensing of Tenable Nessus is that the installation is somewhat easier, but preparing the product, such as the SKU and license options, is quite tricky.
Senior Security Consultant at ITSEC Asia
 

Valuable Features

Microsoft Defender for Cloud enhances security with AI-based threat detection, multi-cloud support, and a unified portal for comprehensive management.
Tenable Nessus offers comprehensive vulnerability coverage, flexible scanning, ease of use, affordable pricing, and effective integration, enhancing security management.
The most valuable feature for me is the variety of APIs available.
Programme Manager- Cyber Fusion- Group CISO at a financial services firm with 10,001+ employees
This feature significantly aids in threat detection and enhances the user experience by streamlining security management.
Cloud Consultant at i-Community AG
The most valuable feature is the recommendations provided on how to improve security.
Cloud architect at a tech vendor with 1,001-5,000 employees
I mostly use the configuration audit feature for the audit configuration as a scan policy, and I will use it for credential audit, which helps me scan credentials access such as local administrator or root access, performing a deeper and more accurate check of local configuration settings and file systems, making it a highly recommended feature.
Founder at Cipheroot
The scanning and reporting features are the most valuable aspects of Tenable Nessus.
SOC Engineer at a outsourcing company with 10,001+ employees
The most valuable features of Tenable Nessus include its ease of access and quick usability.
Security Center Coordinator at a comms service provider with 1-10 employees
 

Categories and Ranking

Microsoft Defender for Cloud
Ranking in Vulnerability Management
8th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
87
Ranking in other categories
Container Management (7th), 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 (4th), Cloud Detection and Response (CDR) (2nd)
Tenable Nessus
Ranking in Vulnerability Management
2nd
Average Rating
8.4
Reviews Sentiment
6.0
Number of Reviews
87
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of February 2026, in the Vulnerability Management category, the mindshare of Microsoft Defender for Cloud is 3.6%, down from 4.7% compared to the previous year. The mindshare of Tenable Nessus is 5.1%, down from 10.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Vulnerability Management Market Share Distribution
ProductMarket Share (%)
Tenable Nessus5.1%
Microsoft Defender for Cloud3.6%
Other91.3%
Vulnerability Management
 

Featured Reviews

David Birhange - PeerSpot reviewer
Director, Cloud and Modern Workplace at Informanix Technology Group
Brings together cloud security insights through a unified view and supports agentless protection for virtual machines
Copilot and similar features are already being used, though not necessarily for Microsoft Defender for Cloud specifically. We are trying to get more experience before rolling out most of Microsoft Defender for Cloud's AI capabilities. This is definitely on our to-do list, and the priority is urgent as we seek to learn more about these capabilities. The GenAI threat protection from Microsoft Defender for Cloud has not been enabled yet. There are many unknowns with AI applications. AI agents will operate while you're not present, whether you are sleeping or awake, and it's unclear whether there would be any exfiltration of data or how data is being managed. Microsoft Purview is being used extensively, and there is significant development going on with DSPM that will be rolled out to address security concerns. Data labeling and proper demarcation for sensitivity of data before it is received are being actively pursued.
MohammedJaffir - PeerSpot reviewer
Founder at Cipheroot
Has enabled me to reduce false positives and perform deep credential auditing with seamless integrations
I mostly use the configuration audit feature for the audit configuration as a scan policy, and I will use it for credential audit, which helps me scan credentials access such as local administrator or root access, performing a deeper and more accurate check of local configuration settings and file systems, making it a highly recommended feature. Regarding integration capabilities, we can integrate Tenable Nessus with SIM tools such as Splunk, IBM QRadar, and Azure Sentinel, as well as with ticketing systems such as ServiceNow, Jira, and Slack. There is no complexity as it is very easy to integrate everything. In terms of the reporting feature, while vulnerability scanning can throw some false positives, Tenable Nessus has very few, achieving a reduction of 75% to 80% false positives with manual analysis needed. We can generate standard Nessus reports that typically include host summaries and vulnerabilities by host and plugin, alongside solutions and remediation recommendations. The main benefits I get from Tenable Nessus are complete asset inventory and comprehensive attack surface management, allowing us to prioritize vulnerabilities based on risk, focusing on true risk and threat path analysis.
report
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Top Industries

By visitors reading reviews
Financial Services Firm
13%
Computer Software Company
11%
Manufacturing Company
9%
Government
6%
Financial Services Firm
10%
Government
10%
Manufacturing Company
10%
Computer Software Company
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business27
Midsize Enterprise10
Large Enterprise49
By reviewers
Company SizeCount
Small Business39
Midsize Enterprise19
Large Enterprise35
 

Questions from the Community

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 cost, and licensing for Microsoft Defender for Cloud was pretty straightforward. We did have a consultation with a third party to go over different tiers and produ...
What needs improvement with Microsoft Defender for Cloud?
Microsoft Defender for Cloud can be improved. An additional feature that should be included in the next release is Zero Trust, similar to ThreatLocker software.
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. You can easily prioritize vulnerabilities using attacker analytics. Overall, Rapid...
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 the program is such that if a company should desire to handle the installation t...
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 address identified vulnerabilities. These scans cover the servers, other network equi...
 

Also Known As

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

Interactive Demo

Demo not available
 

Overview

 

Sample Customers

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: December 2025.
881,665 professionals have used our research since 2012.