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Qualys CyberSecurity Asset Management vs Tenable Nessus comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Feb 8, 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
5.3
Qualys TotalCloud enhances efficiency and automation, achieving up to 40% cost savings and over 50% improved asset scanning.
Sentiment score
4.9
Qualys CyberSecurity Asset Management boosts efficiency, reduces costs, enhances security, and delivers a 95% ROI with 35% cost reduction.
Sentiment score
3.5
Tenable Nessus boosts security by enhancing threat visibility, reducing vulnerabilities, saving costs, and achieving high user satisfaction.
We are able to scan all our assets with less human intervention and achieve overall effective outcomes.
Dns architect at a tech consulting company with 1,001-5,000 employees
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
Improvements to our security infrastructure contributed to overall business growth of approximately 150 percent over the past year.
Android Developer at Droidforge
By automating tasks, it significantly reduces the human resources required, leading to increased efficiency and productivity.
Senior Manager at a consultancy with 10,001+ employees
It has reduced the number of development and scripting hours along with maintenance hours.
Security Operations Manager at Solventum
 

Customer Service

Sentiment score
6.7
Qualys TotalCloud's customer service is praised for responsiveness despite occasional delays, with ratings from seven to ten.
Sentiment score
7.5
Qualys CyberSecurity Asset Management's customer service is highly praised for its responsiveness, effectiveness, and swift problem resolution capabilities.
Sentiment score
4.3
Tenable Nessus support is praised for responsiveness and efficiency, with mixed feedback on response times and depth for advanced queries.
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
The support team was knowledgeable and offered a variety of quick resolution options.
Android Developer at Droidforge
Their SMEs have sufficient knowledge, and if they are not the right contact, they quickly redirect us to someone who can help resolve issues.
Senior Information Security Engineer at a consultancy with 10,001+ employees
I would rate their customer support a ten out of ten.
Information Security Lead at a consultancy 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
Qualys TotalCloud is highly scalable and adaptable, efficiently supporting varied environments and large-scale deployments with robust performance.
Sentiment score
7.8
Qualys CyberSecurity Asset Management excels in scalability, supporting diverse environments with numerous users, networks, and large datasets efficiently.
Sentiment score
5.5
Tenable Nessus is scalable and flexible for most organizations but may face limitations with very large 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
We have about 300,000 assets installed with agents worldwide.
Information Security Lead at a consultancy with 10,001+ employees
The scalability is excellent as we manage more than one hundred thousand assets, including over one hundred thousand endpoints, approximately 2,600 servers, and more than 1,200 network devices.
Cyber Security Specialist at a financial services firm with 10,001+ employees
Qualys Cybersecurity Asset Management has proven to be a highly scalable solution for us over the past couple of years.
Manager Information Security at a consultancy with 10,001+ employees
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
8.4
Qualys TotalCloud is stable and reliable, offering 99.9% uptime with quick support for minor issues and transparent maintenance updates.
Sentiment score
7.5
Qualys CyberSecurity Asset Management is stable, highly rated, with minimal issues, and appreciated for its consistent enhancements and features.
Sentiment score
6.1
Tenable Nessus is praised for stability and reliability, with high user satisfaction despite minor setup and update issues.
Overall, the support provided has been excellent.
Analyst, Information Security at Infosys
It has a lot of scanning mechanisms, which are agentless APIs, eBPF, and cloud agents, that are highly reliable.
Sr Security Engineer at a tech vendor with 5,001-10,000 employees
It is a stable solution, which is why we chose it.
CIO at a venture capital & private equity firm with 11-50 employees
I would rate the stability of Qualys CSAM a ten out of ten.
IT Engineer at a consultancy with 10,001+ employees
The product stability has notably declined over the last two months, and the performance to fulfill a page request is very slow compared to its previous performance.
SENIOR MANAGER, CYBERSECURITY THREAT, RISK & ARCHITECTURE at a tech vendor with 1,001-5,000 employees
They are constantly adding capabilities.
Director of Vulnerability Management at a insurance company with 1,001-5,000 employees
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 Cybersecurity Solutions
 

Room For Improvement

Qualys TotalCloud requires UI improvements, better cloud integration, enhanced support, and optimized reporting, onboarding, and vulnerability detection.
Qualys CyberSecurity Asset Management struggles with integration, configuration flexibility, tagging accuracy, and performance issues needing improvement.
Tenable Nessus requires enhanced reporting, better integration, modern UI, faster scans, accurate detection, and comprehensive IT asset coverage.
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
Qualys is currently not able to identify assets lacking DNS information.
Senior Information Security Engineer at a consultancy with 10,001+ employees
Features enhancing the interaction with IT or security teams should be added, such as a ticketing feature that, if an issue arises in the CSAM module, enables direct ticket creation in systems like ServiceNow.
Senior Security Consultant at CyberNxt Solutions LLP
If there's one key aspect to focus on, it's discovery—the ability to identify assets that you are not aware of, even when you can see they are present.
Information Security Engineer at a manufacturing company with 5,001-10,000 employees
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
An AI feature that helps them discover options without requiring them to deep dive into all features or guides them through advisory functions would be beneficial.
Freelancer And CEO at a tech vendor with 1-10 employees
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
 

Setup Cost

Qualys TotalCloud is costly but justified for large companies due to features, flexibility, and VMware integration efficiencies.
Qualys offers high yet flexible pricing, valued for comprehensive features and cost-effectiveness, especially when bundled with other services.
Tenable Nessus is valued for affordability and flexibility, though costs vary by organization size, IP count, and region.
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
A cost-effective solution.
Senior Security Consultant at CyberNxt Solutions LLP
I believe that the stability and reliability of Qualys offer great value for the money.
Information Security Engineer at a manufacturing company with 5,001-10,000 employees
A monthly subscription starting at approximately $72 per month, depending on the specific package and features included.
Android Developer at Droidforge
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
When we compare it to other solutions, it is more difficult for us to negotiate the price for Tenable Nessus than to negotiate the price with Rapid7.
Freelancer And CEO at a tech vendor with 1-10 employees
 

Valuable Features

Qualys TotalCloud offers efficient asset discovery, security posture management, and vulnerability management with excellent integration and threat intelligence features.
Qualys CyberSecurity Asset Management enhances security with real-time visibility, integration, TruRisk scoring, and simplified asset and patch management.
Tenable Nessus excels in vulnerability detection, user-friendliness, scalability, real-time monitoring, integration, compliance reporting, and remediation advice.
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 correlating this with QDS scores, we can accurately assess the risk level of high or low QDS scores associated with each asset and monitor them accordingly.
Senior Information Security Engineer at a consultancy with 10,001+ employees
The most valuable feature is the real-time visibility Qualys CyberSecurity Asset Management provides into all assets across our development and operational environments.
Android Developer at Droidforge
It also performs scans to identify any vulnerabilities, which helps to take proactive measures before those vulnerabilities are identified by any attacker.
Information Security Lead at a consultancy with 10,001+ 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 Cybersecurity Solutions
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

Qualys TotalCloud
Sponsored
Ranking in Vulnerability Management
11th
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
46
Ranking in other categories
Container Security (11th), Cloud Workload Protection Platforms (CWPP) (8th), Cloud Security Posture Management (CSPM) (8th), SaaS Security Posture Management (SSPM) (2nd), Cloud-Native Application Protection Platforms (CNAPP) (7th)
Qualys CyberSecurity Asset ...
Ranking in Vulnerability Management
8th
Average Rating
9.0
Reviews Sentiment
7.0
Number of Reviews
35
Ranking in other categories
Patch Management (5th), Cyber Asset Attack Surface Management (CAASM) (2nd), Attack Surface Management (ASM) (2nd), Software Supply Chain Security (2nd)
Tenable Nessus
Ranking in Vulnerability Management
3rd
Average Rating
8.4
Reviews Sentiment
6.2
Number of Reviews
88
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2026, in the Vulnerability Management category, the mindshare of Qualys TotalCloud is 1.2%, up from 1.0% compared to the previous year. The mindshare of Qualys CyberSecurity Asset Management is 1.3%, up from 1.0% compared to the previous year. The mindshare of Tenable Nessus is 3.6%, down from 7.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Vulnerability Management Mindshare Distribution
ProductMindshare (%)
Tenable Nessus3.6%
Qualys CyberSecurity Asset Management1.3%
Qualys TotalCloud1.2%
Other93.9%
Vulnerability Management
 

Featured Reviews

reviewer2859021 - PeerSpot reviewer
Sr Security Engineer at a tech vendor with 5,001-10,000 employees
Risk-based triage has transformed container security and now prioritizes high-impact threats
The best features Qualys TotalCloud offers currently include managing cloud infrastructure and container security while facing major challenges such as alert fatigue. Traditional vulnerability scanners flag hundreds of CVEs on short-lived Kubernetes containers, some of which have no internet exposure or are gone before we can even triage them. I leverage Qualys TotalCloud to move beyond static CVSS. I use it to implement runtime exposure, correlation risk reprioritization, and shift-left integration. This notifies developers to fix a base image upstream rather than patching live ephemeral instances. In my work with cloud and container security, the biggest operational hurdle was alert fatigue. I use Qualys to shift left from static CVSS severity to context-aware risk prioritization. I correlated raw vulnerability data with real-time risk factors such as public network exposure, active runtime execution, or overly permissive IAM roles. This allows us to immediately drop the priority of isolated containers and escalate lower-severity CVEs that sit on an exposed, high-risk path. We can map these findings directly back to our CI/CD pipelines so developers can patch the root base images upstream. We have drastically cut down the signal-to-noise ratio, saved a lot of manual hours doing triage work, and ensured engineering effort goes directly towards high-impact risk reduction.
CM
SENIOR MANAGER, CYBERSECURITY THREAT, RISK & ARCHITECTURE at a tech vendor with 1,001-5,000 employees
Has accelerated vulnerability remediation by syncing with asset ownership data
Qualys CyberSecurity Asset Management has Qualys Query Language that works within itself. However, when switching to other modules the QQL either doesn't work or requires a different query to access the information, including in dashboards. They need to make their query language universal across the entire product so when using one module and making a query, it doesn't require changing the query to work in another module.The stability has decreased significantly on the product in the last couple of months. It takes considerable time to log into the product, and sometimes access is denied. Screens take long to load and occasionally crash. The product stability has notably declined over the last two months, and the performance to fulfill a page request is very slow compared to its previous performance.
MohammedJaffir - PeerSpot reviewer
Founder at Cipheroot Cybersecurity Solutions
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
Comms Service Provider
16%
Outsourcing Company
12%
Manufacturing Company
11%
Financial Services Firm
10%
Financial Services Firm
14%
Comms Service Provider
9%
Outsourcing Company
8%
Manufacturing Company
7%
Financial Services Firm
10%
Manufacturing Company
9%
Government
8%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business14
Midsize Enterprise5
Large Enterprise34
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise2
Large Enterprise23
By reviewers
Company SizeCount
Small Business41
Midsize Enterprise19
Large Enterprise35
 

Questions from the Community

What needs improvement with Qualys TotalCloud?
In terms of improvement, remediation still belongs to the cloud team, which is one of the issues we faced with Qualys...
What is your primary use case for Qualys TotalCloud?
My main use case for Qualys TotalCloud is regarding the cloud visibility that we were not having previously. Previous...
What needs improvement with Qualys CyberSecurity Asset Management?
I think the one thing Qualys CyberSecurity Asset Management can do better is the package management and the updating ...
What is your primary use case for Qualys CyberSecurity Asset Management?
I primarily use it for a small, single-site, multi-source setup with multi-WAN inputs. I have a main fiber connection...
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 is your experience regarding pricing and costs for Tenable Nessus?
Based on my experience, the pricing for Tenable Nessus is somewhat higher, but customers still want to pay for it, so...
 

Also Known As

Qualys TotalCloud with FlexScan
No data available
No data available
 

Overview

 

Sample Customers

Information Not Available
Information Not Available
Bitbrains, Tesla, Just Eat, Crosskey Banking Solutions, Covenant Health, Youngstown State University
Find out what your peers are saying about Qualys CyberSecurity Asset Management vs. Tenable Nessus and other solutions. Updated: September 2026.
913,806 professionals have used our research since 2012.