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Nucleus Security vs Tenable Vulnerability Management comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Feb 23, 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
5.2
Qualys TotalCloud enhances efficiency and risk management, saving time, reducing effort and costs, with 50% operational improvement.
Sentiment score
6.8
Nucleus Security improved resource efficiency and saved time, enhancing workflows and operational practices without formal financial tracking.
Sentiment score
6.5
Tenable Vulnerability Management reduces operational costs by automating processes, providing insights, and integrating metrics for long-term ROI benefits.
It has saved about 90% of our time.
Senior Consultant at a consultancy with 10,001+ employees
TotalCloud has generated overall savings of 30 to 40 percent across various departments.
Security Manager at a consultancy with 10,001+ employees
CallStream helps us integrate and automate tasks.
Senior Security Consultant at CyberNxt Solutions LLP
With security, it is always hard to quantify, and we did not really save money, but we used time more effectively and changed our way of working.
Cyber Security Architect at a retailer with 10,001+ employees
We have seen an absolutely clear return on investment in Nucleus Security, and it primarily shows up in massive time savings and vastly improved resource utilization.
manager at a computer software company with 201-500 employees
Automation handles reporting on a scheduled basis and alerts system owners about their posture each week.
Vulnerability And Compliance Manager at a insurance company with 5,001-10,000 employees
 

Customer Service

Sentiment score
7.3
Qualys TotalCloud's customer service is efficient and competent, though users desire faster responses for complex issues.
Sentiment score
7.9
Nucleus Security's customer service is highly praised for reliability and effectiveness, with minor improvements suggested for response time.
Sentiment score
6.1
Tenable's customer support receives mixed reviews, with varying experiences in response times, expertise, and accessibility ratings.
They are helpful, respond to my queries, and can answer any question.
Developer at a consultancy with 10,001+ employees
Qualys's tech support is highly responsive, providing multiple ways to interact with them.
Service Manager, Security Operations at CDA IT SOLUTIONS
Qualys' customer service provides quality answers, but the response time is long, even though it is within the SLA.
Works at a consultancy with 10,001+ employees
I would describe Nucleus Security's customer support as absolutely fantastic.
manager at a computer software company with 201-500 employees
Customer support is great; I have always had communication with executive leaders, been able to have roadmap calls, and talk with support.
Vulnerability And Compliance Manager at a insurance company with 5,001-10,000 employees
It needs improvement in response time and addressing feature requests promptly.
Infrastructure patching Manager at a manufacturing company with 1,001-5,000 employees
The technical support of Tenable Vulnerability Management is available 24/7, and whenever we require support, we can get it within five minutes.
Windows Security Patching Operation III (Cyber Operations) at CBTS
We had used Tenable's expert support services in order to make sure that we run Tenable Vulnerability Management on a continuous basis and are able to utilize their services.
Deputy Global Chief Information Security Officer at Nissan Digital
 

Scalability Issues

Sentiment score
7.7
Qualys TotalCloud is praised for scalability and versatility but may require experienced personnel and isn't initially user-friendly.
Sentiment score
8.4
Nucleus Security excels in scalability, efficiently managing growing workloads and applications, ensuring robust performance and business growth.
Sentiment score
7.6
Tenable Vulnerability Management is scalable and user-friendly, but licensing issues may affect expansion benefits for some enterprises.
We started our organization about nine months back. We started with about 30 users, and we now have more than 100 users.
CIO at a venture capital & private equity firm with 11-50 employees
Our organization currently uses it to manage over 1200 web applications.
Analyst, Information Security at Infosys
It is absolutely scalable, and I would rate its scalability as nine out of ten.
retired at a consultancy with 10,001+ employees
The platform has done a great job of handling both stability and scalability excellently.
manager at a computer software company with 201-500 employees
The scalability of Nucleus Security is fairly impressive; even when ingesting multiple assets, there is no noticeable impact.
Vulnerability And Compliance Manager at a insurance company with 5,001-10,000 employees
They can seamlessly scale the number of endpoints from 100 to 1,000,000 in a day.
Infrastructure patching Manager at a manufacturing company with 1,001-5,000 employees
Tenable Vulnerability Management is highly scalable.
Windows Security Patching Operation III (Cyber Operations) at CBTS
With the growing needs of our company, Tenable Vulnerability Management is able to safely adapt.
Deputy Global Chief Information Security Officer at Nissan Digital
 

Stability Issues

Sentiment score
8.3
Qualys TotalCloud is highly stable, with excellent uptime and quick issue resolution, ensuring reliable performance and business continuity.
Sentiment score
8.2
Nucleus Security offers enterprise-grade stability, with reliable performance and minimal downtime, though occasional performance variations are noted.
Sentiment score
8.1
Tenable Vulnerability Management is praised for stability and high performance, with reliable scans and strong overall satisfaction ratings.
Overall, the support provided has been excellent.
Analyst, Information Security at Infosys
It is a stable solution, which is why we chose it.
CIO at a venture capital & private equity firm with 11-50 employees
Continuous monitoring is crucial to ensure system stability and avoid vulnerabilities or threats.
Developer at a consultancy with 10,001+ employees
We rarely, if ever, encounter downtime or performance degradation, even when the platform is running massive automation rules and background synchronization tasks during peak operational hours.
manager at a computer software company with 201-500 employees
I have faced no stability issues with Tenable.
Infrastructure patching Manager at a manufacturing company with 1,001-5,000 employees
The stability is commendable, and I would rate Tenable ten out of ten.
Technical Lead at a healthcare company with 10,001+ employees
The stability of Tenable Vulnerability Management is highly reliable.
Windows Security Patching Operation III (Cyber Operations) at CBTS
 

Room For Improvement

Qualys TotalCloud needs better report clarity, dashboard customization, integration, UI, Windows OS support, pricing, and faster vulnerability detection.
Nucleus Security requires better user training, integration, intuitive onboarding, and improvements in customization, configuration, testing, and documentation processes.
Tenable users face setup challenges, high pricing, and demand better customization, integration, support, and features with clearer licensing.
Ideally, the scanner should automatically detect and scan all subdomains, even if not explicitly defined, ensuring comprehensive vulnerability assessment.
Analyst, Information Security at Infosys
Ideally, updates should be more immediate, enabling quicker implementation of solutions.
Project Lead at Persistent Systems
Our goal is to integrate all these functions into Qualys, creating a single dashboard for comprehensive security monitoring and management.
Senior Information Security Engineer at a consultancy with 10,001+ employees
Nucleus Security needs a better view into exposure management, as exposure management and attack path management are missing.
Cyber Security Architect at a retailer with 10,001+ employees
Having more intuitive step-by-step visualized wizards or guided templates for building complex triage workflows would make the onboarding process much smoother for new team members.
manager at a computer software company with 201-500 employees
It could be integrated with SentinelOne, but it was not showing any SentinelOne alerts.
Head of Security at a consultancy with 51-200 employees
They should also accelerate the process of implementing new features upon request.
Infrastructure patching Manager at a manufacturing company with 1,001-5,000 employees
I would suggest HP WebInspect as a better option than Tenable.io.
Technical Lead at a healthcare company with 10,001+ employees
Tenable Vulnerability Management is not very effective for real-time risk prioritization for our organization's security strategy.
Windows Security Patching Operation III (Cyber Operations) at CBTS
 

Setup Cost

Qualys TotalCloud is considered pricey but valuable for large enterprises, offering cost-effective options especially for VMware users.
Tenable's Vulnerability Management is costly, ranging from $2,300 to $137,000, often pricier than competitors, but suitable for large enterprises.
Qualys TotalCloud's pricing is currently acceptable, it is becoming increasingly expensive.
Senior Manager at a financial services firm with 10,001+ employees
Pricing is managed by our finance team; however, Qualys TotalCloud offers cost-effective licensing flexibility.
IT Manager at a consultancy with 10,001+ employees
Qualys TotalCloud is expensive, but it offers a premier solution with no headaches.
Vice President at Inspira Enterprise
The licensing model is straightforward, with one license across multiple assets for multiple connectors.
Vulnerability And Compliance Manager at a insurance company with 5,001-10,000 employees
Tenable charges around $40 per device, while Rapid7 costs $10 to $15 per device.
Infrastructure patching Manager at a manufacturing company with 1,001-5,000 employees
I would not say very expensive for Tenable Vulnerability Management; it is not prohibitive, but at the same time, there are some other tools in the marketplace which are offering the same kind of services that Tenable offers, the same kind of features that Tenable has offered at a lesser cost.
Deputy Global Chief Information Security Officer at Nissan Digital
 

Valuable Features

Qualys TotalCloud provides comprehensive cloud security, easy management, real-time insights, and efficient vulnerability assessment to enhance infrastructure protection.
Nucleus Security streamlines risk management, enhances automation, reduces alert fatigue, and improves compliance through unified vulnerability management.
Tenable Vulnerability Management excels in container scanning, cloud integration, and visibility, enhancing efficiency, compliance, and overall security posture.
This view of risk helps reduce the work we would have to do to combine multiple sources to prioritize risk.
Works at a consultancy with 10,001+ employees
It will help cybersecurity professionals monitor the cloud and find vulnerabilities.
Developer at a consultancy with 10,001+ employees
We are enjoying the new feature, FlexScan, which is valuable for Internet-facing VMs.
Senior Consultant at a consultancy with 10,001+ employees
By centralizing everything, Nucleus Security has completely eliminated that friction and dramatically cut down on alert fatigue across our infrastructure and support teams because the platform prioritizes risk based on real-world threat intelligence.
manager at a computer software company with 201-500 employees
The risk-based prioritization has helped my team focus on the most critical vulnerabilities by considering severity, asset context, and the remediation priorities.
Head of Security at a consultancy with 51-200 employees
The best features that Nucleus Security offers in my experience are the unified integrations with all of the different vulnerability management platforms.
Cyber Security Architect at a retailer with 10,001+ employees
Tenable enables vulnerability management through potential AI integration that consolidates efforts and resolves multiple vulnerabilities simultaneously.
Infrastructure patching Manager at a manufacturing company with 1,001-5,000 employees
The main benefit of integration with Tenable Vulnerability Management is that there will be no lack of missing vulnerabilities when it comes to the patching environment.
Windows Security Patching Operation III (Cyber Operations) at CBTS
The main benefits that Tenable Vulnerability Management provides for me as an end user include saving time and money and streamlining processes.
Cyber Security Consultant at a tech vendor with 10,001+ employees
 

Categories and Ranking

Qualys TotalCloud
Sponsored
Ranking in Vulnerability Management
11th
Average Rating
8.6
Reviews Sentiment
7.2
Number of Reviews
39
Ranking in other categories
Container Security (11th), Cloud Workload Protection Platforms (CWPP) (7th), Cloud Security Posture Management (CSPM) (8th), SaaS Security Posture Management (SSPM) (1st), Cloud-Native Application Protection Platforms (CNAPP) (6th)
Nucleus Security
Ranking in Vulnerability Management
40th
Average Rating
7.2
Reviews Sentiment
7.1
Number of Reviews
4
Ranking in other categories
Application Security Tools (28th), Risk-Based Vulnerability Management (14th), Continuous Threat Exposure Management (CTEM) (13th)
Tenable Vulnerability Manag...
Ranking in Vulnerability Management
10th
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
46
Ranking in other categories
Patch Management (14th), Risk-Based Vulnerability Management (5th)
 

Mindshare comparison

As of July 2026, in the Vulnerability Management category, the mindshare of Qualys TotalCloud is 1.1%, up from 1.0% compared to the previous year. The mindshare of Nucleus Security is 1.0%, up from 0.8% compared to the previous year. The mindshare of Tenable Vulnerability Management is 2.8%, down from 5.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Vulnerability Management Mindshare Distribution
ProductMindshare (%)
Tenable Vulnerability Management2.8%
Qualys TotalCloud1.1%
Nucleus Security1.0%
Other95.1%
Vulnerability Management
 

Featured Reviews

RO
IT Security Expert at Alior Bank S.A.
Unified risk scoring has improved our cloud visibility and simplifies remediation priorities
Qualys TotalCloud provides unified vulnerability and threat assessment across both IAS and SaaS. This solution provides a single prioritized view of risk, which helps reduce the work I would have to do. We are no longer based on CVSS; we are based on Qualys risk scoring, which is based on CVSS plus internal findings made by Qualys, and then assigns its own score. The TruRisk insight feature has found a small number of assets with high vulnerability scores, though I am cautious since some information is classified. Qualys TotalCloud has positively impacted our bank's performance, and we have definitely seen benefits after implementing this solution.
reviewer2872923 - PeerSpot reviewer
Vulnerability And Compliance Manager at a insurance company with 5,001-10,000 employees
Unified vulnerability view has improved risk-based decisions but reporting still needs work
One of the main issues with Nucleus Security is its lack of reporting capability. The user interface resembles an early 2000s application style, and although its speed is decent, it could be improved as more data is ingested. The overall appearance and feel need work, especially compared to modern applications from Rapid7, Qualys, and Tenable, which have more engaging user interfaces. The reporting capability is severely lacking; not being able to filter to granularity or have custom built queries is an annoyance that needs an overhaul. Additionally, there are bugs that have not been resolved, such as when you create a report and remove an asset, the asset still appears in the report despite not being present in the system anymore, leading to issues that need to be addressed quickly. Nucleus Security can become a difficult investment because I already have a vulnerability management solution, and I question where Nucleus Security fits with its licensing model. While I acknowledge automation has been described, it would be amazing to control the entire vulnerability management workflow from Nucleus Security without needing to log onto other systems. Having controls or actions that can be sent from the console down to the scanner for rescans would be beneficial. If Nucleus Security is going down this path, it should ensure that it becomes a one-stop shop for vulnerability management across multiple applications.
Chethan Gowda - PeerSpot reviewer
Windows Security Patching Operation III (Cyber Operations) at CBTS
Have maintained accurate vulnerability scans and gained actionable remediation insights across thousands of servers
Tenable Vulnerability Management agents are very lightweight, and the results we get are very accurate. The solutions they provide to us, assuming if one vulnerability exists, there will be a solution. The resolution they give us in wording will be the best solution. The exploit rates and the reports we get provide a lot of information, making it very easy for us to verify.The main benefit of integration with Tenable Vulnerability Management is that there will be no lack of missing vulnerabilities when it comes to the patching environment. That is one of the key aspects of why we have integrated Tenable to our patching tools. It has a vast capacity of pushing the data to our tools due to its capability and compatibility. That is also one of the reasons why we are using Tenable Vulnerability Management.
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Top Industries

By visitors reading reviews
Manufacturing Company
16%
Financial Services Firm
13%
Outsourcing Company
8%
Comms Service Provider
7%
Computer Software Company
13%
Financial Services Firm
12%
Construction Company
8%
Healthcare Company
6%
Financial Services Firm
15%
Manufacturing Company
10%
Computer Software Company
8%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise5
Large Enterprise29
No data available
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise3
Large Enterprise22
 

Questions from the Community

What needs improvement with Qualys TotalCloud?
Areas that need improvement in every solution include the remediation part. The remediation steps should be simple en...
What is your primary use case for Qualys TotalCloud?
Our use case involves the assets that we have under cloud, the assets exposed to the internet, and the internal appli...
What is your experience regarding pricing and costs for Nucleus Security?
I have a good experience with that, so we don't have much problem dealing with pricing, setup, and licensing.
What needs improvement with Nucleus Security?
Nucleus Security needs a better view into exposure management, as exposure management and attack path management are ...
What is your primary use case for Nucleus Security?
My main use case for Nucleus Security is unifying the vulnerability management landscape, providing a single source o...
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 needs improvement with Tenable.io Vulnerability Management?
In my opinion, I would like to see additional functions and improvements. Something related to AI would be a good add...
What advice do you have for others considering Tenable.io Vulnerability Management?
I have purchased a license directly from Tenable, so I am working directly with Tenable and not through partners. My ...
 

Also Known As

Qualys TotalCloud with FlexScan
No data available
Tenable.io
 

Overview

 

Sample Customers

Information Not Available
Information Not Available
Global Payments AU/NZ
Find out what your peers are saying about Nucleus Security vs. Tenable Vulnerability Management and other solutions. Updated: July 2026.
904,680 professionals have used our research since 2012.