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Skybox Security Suite vs Tenable Nessus comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 14, 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
4.8
Skybox Security Suite offers high ROI for large networks by automating firewall management, saving time and reducing breach costs.
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
4.1
Skybox Security's support is mixed; responsive but inconsistent, with challenges in engineer availability and multilingual communication.
Sentiment score
3.8
Tenable Nessus support is knowledgeable and efficient but sometimes delayed, with high overall satisfaction despite occasional response speed issues.
A significant issue was contacting support after hours on the weekends.
Security Engineer at a financial services firm 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
I can usually fix all of the issues myself.
Co-Founder at RSU Consultancy
 

Scalability Issues

Sentiment score
5.9
Skybox Security Suite excels in scalability for complex environments, though cost and vertical scaling pose challenges for users.
Sentiment score
5.6
Tenable Nessus is scalable, adaptable, and well-regarded, though larger environments may face server and cloud storage challenges.
One issue I faced with scalability was the transition from Skybox Security Suite's 6500 platform to the 7500 series due to licensing costs becoming prohibitive.
Security Engineer at a financial services firm 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
7.3
Skybox Security Suite is seen as stable, with occasional VM issues and praised responsive support, varying stability ratings.
Sentiment score
5.7
Tenable Nessus is stable with reliable performance, minor update issues, occasional false positives, and rare network interference.
The stability of Tenable Nessus is extraordinary.
Founder at Cipheroot
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
 

Room For Improvement

Skybox Security Suite requires improvements in UI, web access, reporting, integration, pricing, support, cloud connectivity, and data processing.
Tenable Nessus needs improved reporting, integration, and user interface, along with expanded capabilities, flexible pricing, and better documentation.
The lack of continued support and problematic licensing costs were also areas needing improvement.
Security Engineer at a financial services firm with 10,001+ employees
Only the licensing part of Skybox had an edge. We were not renewing the licenses of Skybox every year, but in the case of other tools, we would have to renew if we wanted to use those tools.
Security Architect at a tech vendor with 5,001-10,000 employees
It would be better if something more attractive or similar useful information found in AlgoSec was available.
Software Engineer at LTI - Larsen & Toubro Infotech
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 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

Skybox Security Suite pricing has mixed reviews, seen as cost-effective by some, but expensive due to varied licensing models.
Enterprise evaluations praise Tenable Nessus for competitive pricing, though licensing flexibility issues may increase costs for larger networks.
From a commercial perspective, AlgoSec is more expensive compared to Skybox Security Suite.
Software Engineer at LTI - Larsen & Toubro Infotech
The pricing became prohibitive when transitioning between the 6500 and 7500 series models.
Security Engineer at a financial services firm with 10,001+ employees
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

Skybox Security Suite offers comprehensive security management with key features like scalability, integration, and user-friendly dashboards for large enterprises.
Tenable Nessus offers comprehensive vulnerability coverage, flexible scanning, ease of use, affordable pricing, and effective integration, enhancing security management.
The tool successfully helped in preventing vulnerabilities and breaches.
Security Engineer at a financial services firm with 10,001+ employees
Skybox Security Suite's network modeling and path analysis is a good feature when we need to check regarding the connectivity.
Security Architect at a tech vendor with 5,001-10,000 employees
The most helpful feature is the firewall analyzer.
Software Engineer at LTI - Larsen & Toubro Infotech
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

Skybox Security Suite
Ranking in Vulnerability Management
40th
Average Rating
7.6
Reviews Sentiment
6.2
Number of Reviews
38
Ranking in other categories
Firewall Security Management (6th)
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 Skybox Security Suite is 0.6%, up from 0.4% 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%
Skybox Security Suite0.6%
Other94.3%
Vulnerability Management
 

Featured Reviews

reviewer2697804 - PeerSpot reviewer
Security Engineer at a financial services firm with 10,001+ employees
Tool identifies vulnerabilities and monitors connectivity effectively
Skybox Security Suite was a very good tool for my organization. I used it for monitoring connectivity between internal and external sites, monitoring our AWS instances, and ensuring workstations and Layer 3 devices met security specifications. The tool successfully helped in preventing vulnerabilities and breaches, but unfortunately, operations ceased before completing a migration to SaaS.
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
17%
Computer Software Company
11%
Manufacturing Company
11%
Energy/Utilities Company
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 Business21
Midsize Enterprise4
Large Enterprise21
By reviewers
Company SizeCount
Small Business39
Midsize Enterprise19
Large Enterprise35
 

Questions from the Community

What do you like most about Skybox Security Suite?
Overall, the tool has helped us reduce risks. If any step is missing, it's easier for my team or engineers to identify it. The tool provides accurate recommendations based on the data. Its integrat...
What is your experience regarding pricing and costs for Skybox Security Suite?
From a commercial perspective, AlgoSec is more expensive compared to Skybox Security Suite. Skybox Security Suite is cost-effective.
What needs improvement with Skybox Security Suite?
The features that I appreciated the most in Skybox Security Suite were not comparable with Tufin, as Tufin was far ahead in terms of the technology and the user interface. The effectiveness of the ...
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

ADP, Blue Cross Blue Shield, BT, USAID, Delta Dental, EDF Energy, EMC, HSBC, Johnson & Johnson
Bitbrains, Tesla, Just Eat, Crosskey Banking Solutions, Covenant Health, Youngstown State University
Find out what your peers are saying about Skybox Security Suite vs. Tenable Nessus and other solutions. Updated: February 2026.
881,733 professionals have used our research since 2012.