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Cortex Cloud by Palo Alto Networks vs Tenable Nessus comparison

 

Comparison Buyer's Guide

Executive Summary

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
3.7
Cortex Cloud by Palo Alto Networks enhances response time and ROI with discounts and features, beneficial during critical periods.
Sentiment score
3.0
Tenable Nessus boosts security by enhancing threat visibility, reducing vulnerabilities, saving costs, and achieving high user satisfaction.
The solution provides a good ROI, especially for regular customers, offering discounts for three-year licenses.
Senior Cybersecurity Consultant at Ernst & Young
I don't think the tool in itself is very capable of doing that, but we have XSOAR and other tool integrations done on the platform, so this can be accomplished.
Technical Solutions Architect at IBM
 

Customer Service

Sentiment score
6.6
Cortex Cloud offers efficient global support, expert troubleshooting, and user-friendly dashboards, driving strategic adoption despite its cost.
Sentiment score
3.9
Tenable Nessus support is praised for responsiveness and efficiency, with mixed feedback on response times and depth for advanced queries.
If I make it a high priority, they have resolved one query within 20 minutes.
Assistant Security Architect at Cloudnomics
If local Indian support cannot resolve an issue, global tech support aligns promptly within the agreed SLA.
Senior Cybersecurity Consultant at Ernst & Young
Fast response times and knowledgeable staff who understand the intricacies of the system.
Sr. Cloud Security Architect at a tech services company with 11-50 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
4.5
Cortex Cloud offers scalability, efficient response, and integration, maintaining consistent pricing, rated highly for organizations of all sizes.
Sentiment score
5.2
Tenable Nessus is scalable and flexible for most organizations but may face limitations with very large enterprises.
For stability, scalability, mean time to response, and potential incident investigation improvements, I would give it a nine or probably even a ten.
Business Development Team Lead at a tech vendor with 201-500 employees
Onboarding endpoints and assets on Cortex Cloud by Palo Alto Networks is very easy.
Assistant Security Architect at Cloudnomics
The platform is able to auto-shut certain resources that are not in use through the agentless scan feature.
Technical Solutions Architect at IBM
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
7.8
Cortex Cloud by Palo Alto Networks is reliable, stable, with quick performance, no latency, and effective real-time attack prevention.
Sentiment score
5.8
Tenable Nessus is praised for stability and reliability, with high user satisfaction despite minor setup and update issues.
My impression of Cloud Runtime Security in stopping attacks in real-time is that I have never had an issue where it has let something through, causing an outage or concerns to the customer.
Business Development Team Lead at a tech vendor with 201-500 employees
However, now in Cortex Cloud, I have not seen any lag or buffer.
Assistant Security Architect at Cloudnomics
My evaluation of how stable and reliable Cortex Cloud by Palo Alto Networks is very positive.
Technical Solutions Architect at IBM
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

Cortex Cloud requires a user-friendly interface, cost efficiency, enhanced features, and skilled personnel to overcome operational challenges.
Tenable Nessus requires enhanced reporting, better integration, modern UI, faster scans, accurate detection, and comprehensive IT asset coverage.
Regarding the generative AI security tool, I know for sure it's Agentic.
Cybersecurity Analyst at a tech services company with 11-50 employees
The solution is quite premium in cost compared to alternatives such as Wiz.
Sr. Cloud Security Architect at a tech services company with 11-50 employees
There is not a clear MSP model compared to other vendors such as CrowdStrike.
Business Development Manager For Palo Alto Networks at a tech services 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

Tenable Nessus is valued for affordability and flexibility, though costs vary by organization size, IP count, and region.
The solution is costly, with high-end capabilities suitable for enterprises.
Senior Cybersecurity Consultant at Ernst & Young
Today, it is smart and easy to calculate the licenses.
Cloud Security Manager at T-Systems International GmbH
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

Cortex Cloud enhances security with AI-driven automation, reducing manual tasks and improving threat management for lean enterprise teams.
Tenable Nessus excels in vulnerability detection, user-friendliness, scalability, real-time monitoring, integration, compliance reporting, and remediation advice.
AI/ML aids in anticipating remediation for misconfigurations and vulnerabilities, and automatic remediation can be easily configured.
Senior Cybersecurity Consultant at Ernst & Young
Cortex Cloud by Palo Alto Networks has reduced the time spent on incident investigations, and if I had to estimate, I would say it has cut our investigation time in half.
Sr. Compliance Analyst at a computer software company with 51-200 employees
This simplifies the management of shared responsibility among different people and entities, allowing you to use one single tool instead of having dozens of different tools to orchestrate and integrate.
Business Development Manager For Palo Alto Networks at a tech services 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
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

Cortex Cloud by Palo Alto N...
Ranking in Vulnerability Management
27th
Average Rating
8.6
Reviews Sentiment
5.7
Number of Reviews
11
Ranking in other categories
Cloud Workload Protection Platforms (CWPP) (13th), Cloud Security Posture Management (CSPM) (18th), Cloud-Native Application Protection Platforms (CNAPP) (12th), Data Security Posture Management (DSPM) (12th), Software Supply Chain Security (7th), Cloud Infrastructure Entitlement Management (CIEM) (6th), Application Security Posture Management (ASPM) (6th), Cloud Detection and Response (CDR) (4th)
Tenable Nessus
Ranking in Vulnerability Management
2nd
Average Rating
8.4
Reviews Sentiment
6.0
Number of Reviews
88
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of March 2026, in the Vulnerability Management category, the mindshare of Cortex Cloud by Palo Alto Networks is 0.9%. The mindshare of Tenable Nessus is 5.0%, down from 10.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Vulnerability Management Mindshare Distribution
ProductMindshare (%)
Tenable Nessus5.0%
Cortex Cloud by Palo Alto Networks0.9%
Other94.1%
Vulnerability Management
 

Featured Reviews

SJ
Technical Solutions Architect at IBM
Cloud security has improved as AI-driven runtime protection detects threats and reduces incidents
In my opinion, Cortex Cloud by Palo Alto Networks could be improved or enhanced in various ways. I don't have an idea about that yet because for that you actually need to use two or three different other tools to make a basic comparison. If you ask me how good the tool is, I would fairly rate it quite high. The tool is very popular, and customers can already see that it is one of the cloud leaders in the security space. The platform had a very good feature which provides documentation links about how to use a specific feature on the UI. It takes you to the proper documentation page where it suggests what to do and tells you about the steps that need to be done for a resource deployment. My thoughts about improving the product which I believe could greatly aid vendors is that it used to be a very user-friendly tool, but now they have incorporated everything under one umbrella. It has XDR, XSOAR, and Cortex Cloud by Palo Alto Networks. Before, we used to have separate modules and separate environments for each of these capabilities or features. Right now, it is a little complex and users would take their own time to know the tool better. This is something that would have been way better, but I would say there would be different opinions on this. Talking about user-friendliness, it has decreased now.
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
9%
Manufacturing Company
9%
Performing Arts
8%
Computer Software Company
7%
Manufacturing Company
10%
Financial Services Firm
10%
Government
10%
Computer Software Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business6
Midsize Enterprise1
Large Enterprise4
By reviewers
Company SizeCount
Small Business40
Midsize Enterprise19
Large Enterprise35
 

Questions from the Community

What is your experience regarding pricing and costs for Cortex Cloud by Palo Alto Networks?
The solution is costly, with high-end capabilities suitable for enterprises. It is less affordable for startups or small-scale vendors.
What needs improvement with Cortex Cloud by Palo Alto Networks?
As per my experience with Cortex Cloud by Palo Alto Networks, the UI could be simpler. There are few features which are very hidden, such as those in software bill of materials and compliance polic...
What is your primary use case for Cortex Cloud by Palo Alto Networks?
My use case for Cortex Cloud by Palo Alto Networks is for CSPM, application security, and IAM. I use it for checking on the asset inventory, policies, and standards like GDPR, NIST, and SOC 2 compl...
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...
 

Overview

 

Sample Customers

Information Not Available
Bitbrains, Tesla, Just Eat, Crosskey Banking Solutions, Covenant Health, Youngstown State University
Find out what your peers are saying about Cortex Cloud by Palo Alto Networks vs. Tenable Nessus and other solutions. Updated: March 2026.
884,933 professionals have used our research since 2012.