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FortiCNAPP vs Tenable Nessus comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Feb 22, 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
5.7
FortiCNAPP enhances security efficiency, cuts costs, reduces staffing needs, and offers competitive pricing, improving overall resource allocation.
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
FortiCNAPP is a competitive and robust solution, the only one in the IT sphere that addresses all quadrants in the Gartner Quadrants.
Client Manager at MLL Telecom Ltd
They need fewer employees from a SOC perspective where people are deployed in their SOC, as well as significant time saved.
Solutions Sales Specialist at a outsourcing company with 1,001-5,000 employees
 

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
7.9
FortiCNAPP customer service is proactive and highly rated for quick responses and efficient problem resolution through Slack and email.
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
My technical teams do utilize integration with DevOps tools, as it performs significantly with automation regarding sophisticated challenges.
Client Manager at MLL Telecom Ltd
Fortinet's technical support is definitely helpful and responsive.
Owner at IT CARE
Since Fortinet support is provided by the local vendor and is always available and quick, I would rate them a 10.
Security Consultant at Payatu
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
6.3
FortiCNAPP offers strong scalability, efficiently managing growth across cloud platforms, though licensing and deployment time might pose challenges.
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
For complex large customers, global deployments, or large public sector customers, the process can take longer.
Client Manager at MLL Telecom Ltd
It can handle growing workloads or expanding environments smoothly.
Solutions Sales Specialist at a outsourcing company with 1,001-5,000 employees
FortiCNAPP's scalability is open, and we can change instances easily as needed.
DGM at Airtel Digital
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
7.7
FortiCNAPP is stable with consistent performance, fast threat response, minimal issues, effective support, and regular improvements.
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
They respond within the service level agreements and are proactive in their approach.
Client Manager at MLL Telecom Ltd
I have not experienced any downtime or issues reported by my clients.
Solutions Sales Specialist at a outsourcing 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.
FortiCNAPP needs improved alerts configuration, tool integration, user interface, scalability, reporting, ITSM integration, and better licensing options.
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
The vulnerability part is not systematically organized; it is all clumsy in the web UI, and it is not user-friendly.
Software Engineer at a university with 5,001-10,000 employees
The solution could be more user-friendly and intuitive.
Client Manager at MLL Telecom Ltd
Reporting and alert configurations might require time to tune properly.
Solutions Sales Specialist at a outsourcing company with 1,001-5,000 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.
Enterprise users find FortiCNAPP's pricing initially high but increasingly affordable, flexible, and justified by specific use cases.
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
The pricing is a mediator compared to other products; it is not that much higher and not much lower than other products, making it a very affordable price.
Owner at IT CARE
FortiCNAPP is not a cheap solution, and licensing around it can become very expensive for specific customers.
Solutions Sales Specialist at a outsourcing company with 1,001-5,000 employees
Regarding pricing, setup cost, and licensing, since it's a marketplace, I find the pay-as-you-go model convenient and fair.
DGM at Airtel Digital
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.
FortiCNAPP enhances security with compliance reporting, anomaly detection, Zero Trust, seamless onboarding, and integration with SIEM solutions.
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
It functions as a proactive tool, enabling me to identify threats quickly and automate responses.
Client Manager at MLL Telecom Ltd
Automated policy recommendations with this solution do help to improve security.
Senior Sales Account Manager at Hard2bit Cybersecurity
Compliance reporting that supports frameworks such as PCI, SOC 2, and CIS is a game changer.
Solutions Sales Specialist at a outsourcing company 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 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)
FortiCNAPP
Ranking in Vulnerability Management
29th
Average Rating
8.2
Reviews Sentiment
6.7
Number of Reviews
17
Ranking in other categories
Container Security (17th), Cloud Workload Protection Platforms (CWPP) (13th), Cloud Security Posture Management (CSPM) (12th), Cloud-Native Application Protection Platforms (CNAPP) (11th), Compliance Management (9th)
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 FortiCNAPP is 1.9%, up from 1.2% 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 TotalCloud1.2%
FortiCNAPP1.9%
Other93.3%
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.
Charl Pinches - PeerSpot reviewer
Solutions Sales Specialist at a outsourcing company with 1,001-5,000 employees
Cloud risk has become visible and security teams prioritize and act on threats efficiently
FortiCNAPP can be improved because the platform can feel complex at the start, especially for teams new to CNAP tooling. Some users mention that they found the interface and data models less intuitive than expected, and I have had situations where reporting and alert configurations might require time. Regarding other improvements needed for FortiCNAPP, the majority of the time is that reporting and alert configuration might require time to tune properly. This is the significant issue, combined with the fact that some users find the interface and data model less intuitive than expected. Regarding FortiCNAPP's AI capabilities, I think there might be a bit of improvement needed. However, since Fortinet is a security vendor overall, keeping the data safe is not a problem. I know they have invested a lot in getting it to a place where it is a trusted platform.
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.
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Top Industries

By visitors reading reviews
Comms Service Provider
16%
Outsourcing Company
12%
Manufacturing Company
11%
Financial Services Firm
10%
Comms Service Provider
10%
Construction Company
8%
Financial Services Firm
8%
Outsourcing 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 Business9
Midsize Enterprise5
Large Enterprise8
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 is your experience regarding pricing and costs for Lacework?
We purchased the Fortinet firewall and services from a vendor, not through any other marketplaces.
What needs improvement with Lacework?
FortiCNAPP can be improved because the platform can feel complex at the start, especially for teams new to CNAP tooli...
What is your primary use case for Lacework?
My main use case for FortiCNAPP, from my previous experience distributing it or now as a reseller, is for anyone who'...
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
Polygraph, FortiCNP, Lacework
No data available
 

Overview

 

Sample Customers

Information Not Available
J.Crew, AdRoll, Snowflake, VMWare, Iterable, Pure Storage, TrueCar, NerdWallet, and more.
Bitbrains, Tesla, Just Eat, Crosskey Banking Solutions, Covenant Health, Youngstown State University
Find out what your peers are saying about FortiCNAPP vs. Tenable Nessus and other solutions. Updated: September 2026.
913,806 professionals have used our research since 2012.