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FortiCNAPP vs Tenable Nessus comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 18, 2025

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
6.1
FortiCNAPP enhances security, saves time and costs by automating alerts and reducing manual efforts, justifying its investment.
Sentiment score
2.5
Tenable Nessus excels in vulnerability management, boosting security, offering cost-efficiency, and enhancing threat detection and patch deployment.
 

Customer Service

Sentiment score
7.9
FortiCNAPP’s customer service is praised for responsiveness, proactive communication, and efficient issue resolution via Slack and email.
Sentiment score
3.8
Tenable Nessus support is knowledgeable and efficient but sometimes delayed, with high overall satisfaction despite occasional response speed issues.
Technical support from Fortinet is good; I get feedback and responses quickly.
Software Engineer at a university with 5,001-10,000 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
I can usually fix all of the issues myself.
Co-Founder at RSU Consultancy
 

Scalability Issues

Sentiment score
7.5
FortiCNAPP is praised for scalability and adaptability, with positive integration across environments, but challenges include high-traffic scenarios.
Sentiment score
5.6
Tenable Nessus is scalable, adaptable, and well-regarded, though larger environments may face server and cloud storage challenges.
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
7.4
FortiCNAPP is stable, with occasional minor detection issues and lags, yet frequent updates maintain steady performance.
Sentiment score
5.7
Tenable Nessus is stable with reliable performance, minor update issues, occasional false positives, and rare network interference.
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

FortiCNAPP requires improvements in integration, security features, user interface, alert management, and data visibility for enhanced user experience.
Tenable Nessus needs improved reporting, integration, and user interface, along with expanded capabilities, flexible pricing, and better documentation.
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
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
Tenable could improve by integrating Gemini or ChatGPT for deeper analysis in risk assessment.
Founder at Cipheroot
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

FortiCNAPP pricing is flexible and stable, with costs ranging from $80,000 to $200,000 annually, not seen as prohibitive.
Enterprise evaluations praise Tenable Nessus for competitive pricing, though licensing flexibility issues may increase costs for larger networks.
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

FortiCNAPP excels in compliance, threat detection, integration, and automation, enhancing security and efficiency in multi-cloud environments.
Tenable Nessus offers comprehensive vulnerability coverage, flexible scanning, ease of use, affordable pricing, and effective integration, enhancing security management.
The machine learning capability in Lacework FortiCNAPP is used for threat detection.
Software Engineer at a university with 5,001-10,000 employees
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.
Founder at Cipheroot
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
The scanning and reporting features are the most valuable aspects of Tenable Nessus.
SOC Engineer at a outsourcing company with 10,001+ employees
 

Categories and Ranking

FortiCNAPP
Ranking in Vulnerability Management
41st
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
11
Ranking in other categories
Container Security (30th), Cloud Workload Protection Platforms (CWPP) (18th), Cloud Security Posture Management (CSPM) (26th), Cloud-Native Application Protection Platforms (CNAPP) (16th), Compliance Management (10th)
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 FortiCNAPP is 1.7%, up from 1.3% 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%
FortiCNAPP1.7%
Other93.2%
Vulnerability Management
 

Featured Reviews

SK
Software Engineer at a university with 5,001-10,000 employees
Improving security insights has been helpful but inconsistent vulnerability tracking needs attention
The vulnerability part is not systematically organized; it is all clumsy in the web UI, and it is not user-friendly. Regarding improvements, the vulnerability part, recent changes with user management, and Fortinet IM coming into place, which is not helpful at all because it cuts out the automation part, are the most important things. Lacework FortiCNAPP should have a new clean UI and ease of access for the users as that should be the main concern. There are limitations regarding the scalability of Lacework FortiCNAPP. There are also more limitations with integrations like GitHub or any other pipeline, CI/CD, or ISD. It is glitchy and works well only sometimes, and most of the time, the reports or other things are not properly calculated or circulated with the teams.
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
12%
Computer Software Company
11%
Manufacturing Company
7%
University
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 Business4
Midsize Enterprise4
Large Enterprise4
By reviewers
Company SizeCount
Small Business39
Midsize Enterprise19
Large Enterprise35
 

Questions from the Community

What is your experience regarding pricing and costs for Lacework?
My smaller deployments cost around 200,000 a year, which is probably not as expensive as Wiz.
What needs improvement with Lacework?
The vulnerability part is not systematically organized; it is all clumsy in the web UI, and it is not user-friendly. Regarding improvements, the vulnerability part, recent changes with user managem...
What is your primary use case for Lacework?
The major use case for Lacework FortiCNAPP is for security. I'm using it for security internally for my company.
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

Polygraph, FortiCNP, Lacework
No data available
 

Overview

 

Sample Customers

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: February 2026.
881,733 professionals have used our research since 2012.