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Nucleus Security vs Tenable Nessus comparison

 

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:
 

Categories and Ranking

Nucleus Security
Ranking in Vulnerability Management
41st
Average Rating
7.6
Reviews Sentiment
6.9
Number of Reviews
2
Ranking in other categories
Application Security Tools (26th), Risk-Based Vulnerability Management (14th), Continuous Threat Exposure Management (CTEM) (13th)
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 April 2026, in the Vulnerability Management category, the mindshare of Nucleus Security is 0.8%, up from 0.8% compared to the previous year. The mindshare of Tenable Nessus is 4.2%, down from 9.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Vulnerability Management Mindshare Distribution
ProductMindshare (%)
Tenable Nessus4.2%
Nucleus Security0.8%
Other95.0%
Vulnerability Management
 

Featured Reviews

BJ
Technical Director at Entrust Software Development India
Centralized security testing has improved vulnerability remediation and compliance reporting
I recommend more enhancements focusing on penetration testing for both SSL over HTTP and non-SSL over HTTP, specifically targeting the RCP Rich Client Platform and Equinox frameworks that allow on-premises desktop applications to be tested simultaneously. I believe those would significantly improve the tool in the future. I choose eight as my rating primarily because of the installer app; it becomes challenging to identify the actual vulnerabilities. Once we build this installer—rather than just working on the codebase—sometimes, we face gaps considering the build parameters and conversions to the installer. Identifying those gaps is an area that could use improvement after the installer or desktop application testing, which would be beneficial. That is the only reason; otherwise, I could easily rate it a ten out of ten given its smooth operational process.
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.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"I think the best features that Nucleus Security offers are purely the faster remediation to dev tools, which is crucial for managing, prioritizing, and fixing vulnerabilities while helping operational pipelines run these vulnerability management tools."
"We have seen clear compliance and risk control outcomes more than other operational metrics, including fewer process gaps during documentation and safety checks, strong consistency in following protocols for handling, traceability, and staff awareness, better audit readiness, a lower chance of procedure errors, and faster escalation when something appears out of standard, which is very important for us in the healthcare sector."
"The trial version is very good for testing whether it will suit your needs."
"The solution is great for scanning servers."
"I am impressed with the tool's vulnerability scanning."
"Tenable Nessus is one of the best vulnerability assessment tools that I know."
"We can now deliver highly professional consulting using the product."
"Tenable Nessus is good. It's the best vulnerability solution in the industry."
"Makes ransomware checking and OS auditing and implementation relatively easy."
"I like this solution because it is complete, it can scan and check many types of vulnerabilities, it can also check for compliance, it fits very well in my environment, it is very easy to use, and there is a very good cost-benefit of this solution."
 

Cons

"Protocols can be too complex in practice sometimes, and some processes can feel heavy and disconnected from our daily workflow."
"I choose eight as my rating primarily because of the installer app; it becomes challenging to identify the actual vulnerabilities."
"We feel the solution's technical support to be very bad."
"The interface is a little bit clunky, and the reporting is not marvelous."
"Pricing is one of the most important features, and it is something that they can improve on."
"We'd like to see more integration potential within the solution."
"We'd like to see the solution embrace more user-friendliness."
"The price and scalability of the solution could improve."
"Tenable Nessus could improve the reporting by adding some dashboards. The reports are a hassle at this time."
"You can scale Nessus to the extent that you can afford it. You need to have a license for every device you scan. As long as you can afford the increased costs, you won't have a problem scaling it."
 

Pricing and Cost Advice

Information not available
"The product pricing is dynamic and varies based on the specific needs of each project and customer."
"While Tenable Nessus is a good enterprise solution, the high price would likely make it prohibitive to smaller organizations."
"Cost-wise, it's an affordable tool."
"Nessus Manager is not an expensive product. It has its limitations, but the pricing reflects that. We have a yearly subscription."
"The price of Tenable Nessus is much more competitive versus other solutions on the market."
"In general, it is extremely expensive."
"The solution is expensive."
"I think the price is fairly affordable. It provides a license that is fair."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
11%
Comms Service Provider
7%
Healthcare Company
6%
Financial Services Firm
10%
Manufacturing Company
10%
Government
9%
Computer Software Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business40
Midsize Enterprise19
Large Enterprise35
 

Questions from the Community

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?
I think it can be improved by making it more practical, integrated, and easier for teams to apply in real-world workflow from a healthcare perspective. The main improvements I can see right now are...
What is your primary use case for Nucleus Security?
I have been using Nucleus Security for the past few years in my company, particularly in the healthcare field.I use Nucleus Security especially for understanding radiation safety, nuclear medicine,...
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 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 it remains acceptable. The annual price increase of six to seven percent could ...
 

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 Nucleus Security vs. Tenable Nessus and other solutions. Updated: April 2026.
886,719 professionals have used our research since 2012.