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Kali Linux vs Security Onion 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:
 

Categories and Ranking

Kali Linux
Average Rating
8.6
Reviews Sentiment
6.9
Number of Reviews
25
Ranking in other categories
Operating Systems (OS) for Business (10th)
Security Onion
Average Rating
7.6
Reviews Sentiment
5.5
Number of Reviews
3
Ranking in other categories
Log Management (23rd)
 

Mindshare comparison

Kali Linux and Security Onion aren’t in the same category and serve different purposes. Kali Linux is designed for Operating Systems (OS) for Business and holds a mindshare of 3.7%, up 1.9% compared to last year.
Security Onion, on the other hand, focuses on Log Management, holds 3.1% mindshare, down 5.7% since last year.
Operating Systems (OS) for Business Mindshare Distribution
ProductMindshare (%)
Kali Linux3.7%
Rocky Linux10.2%
Ubuntu Linux8.8%
Other77.3%
Operating Systems (OS) for Business
Log Management Mindshare Distribution
ProductMindshare (%)
Security Onion3.1%
Wazuh7.5%
Splunk Enterprise Security6.8%
Other82.6%
Log Management
 

Featured Reviews

Ciyagi Ciyagi - PeerSpot reviewer
Senior Solution Architect & Delivery Lead at a tech services company with 10,001+ employees
Runs efficiently across devices and streamlines penetration testing workflows
Kali Linux could be improved by including more tools. I would personally like to see improvements in Kali Linux, particularly regarding Grub issues that sometimes occur when installing the VM. Additionally, I have experienced problems when updating Kali Linux from a higher version to a lower version, which resulted in crashes. These Grub issues should be resolved. I face significant challenges with Kali Linux regarding a major issue with the Grub loader becoming corrupted, which makes it very difficult to recover data.
Jörg Kippe - PeerSpot reviewer
Scientist at a educational organization with 10,001+ employees
A mature and affordable solution that is easy to install and easy to update
The product takes time to learn, it's not that easy. In the beginning we had a lot of questions. If you want to use such a tool in an real (industrial) environment, you have to ask how to get the network data. Can we do a full packet capture? Can we provide agents to our end systems? There are no simple solutions to these questions. It's a general problem when running such systems in an industrial environment.

Quotes from Members

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

Pros

"Kali Linux positively impacts my organization by allowing us to monitor changes and security posture for the company."
"I'm mostly using for the web security web application, so end map and the troubleshoot will it's my price, and it's available in ColliNX."
"Kali Linux has positively impacted my work by facilitating and simplifying the setup for an operating system and installing tools."
"The solution's most valuable feature is that it is very easy to use."
"The tools available in Kali Linux are incredibly effective for conducting security assessments."
"If you are looking for faster, better performance or scalability, then Kali Linux is the best."
"Kali Linux has the capability of real-time data scanning for vulnerability assessment for backend services, and that is actually very far more valuable."
"Kali Linux offers excellent features including being lightweight with low memory usage, easy installation, portability, and multiple architectures such as ARM architecture and server architecture."
"We use Security Onion for internal vulnerability assessment."
"The most valuable feature of Security Onion for security monitoring is its ability to find infected ports."
"Security Onion is the most mature solution in the market."
 

Cons

"The installation process of Kali Linux can be slow, particularly when installing and upgrading packages within virtualized environments."
"I face significant challenges with Kali Linux regarding a major issue with the Grub loader becoming corrupted, which makes it very difficult to recover data."
"There is a significant lack of examples for Kali Linux, so you always need to go to external resources to get examples on how to use several tools that come with Kali Linux."
"The only point that I didn't find on Kali Linux for now is the ability to customize port scanning."
"I face significant challenges with Kali Linux regarding a major issue with the Grub loader becoming corrupted, which makes it very difficult to recover data."
"I face significant challenges with Kali Linux regarding a major issue with the Grub loader becoming corrupted, which makes it very difficult to recover data."
"The tool is already stable and well-developed, so there's minimal feedback for enhancement or change. However, it should improve security, which is crucial, especially with the increasing use of Kali Linux in cloud environments."
"There can be some lagging issues because the product gets stuck at times, making it an area of concern where improvements are required."
"Security Onion's user interface could be improved."
"The initial setup of the solution is a little bit difficult."
"The product is not easy to learn."
 

Pricing and Cost Advice

"The licensing fee is expensive compared to other products."
"Kali Linux is open source."
"Kali Linux offers a perpetual license, meaning you pay for it once and can use it. While free versions of Linux are available, Kali Linux, being an enterprise edition, usually comes with a perpetual license. I rate its pricing a five out of ten."
"I have used the free version."
"There is no need to make any payments towards the licensing costs since it is a solution that is available for free."
"The price is good because Kali Linux already provides a good bundle of tools."
"I use it free of charge."
"It is an open-source tool."
"It is an open-source solution."
"Security Onion is an open-source solution."
"Security Onion is a free solution."
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Top Industries

By visitors reading reviews
University
14%
Comms Service Provider
12%
Computer Software Company
10%
Educational Organization
10%
University
12%
Government
11%
Comms Service Provider
10%
Computer Software Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise2
Large Enterprise16
No data available
 

Questions from the Community

What do you like most about Kali Linux?
I use the tool with Nmap to perform network audits. We use it to find vulnerabilities in our network through attacks. It's for those who want to launch or create viruses or perform attacks on syste...
What is your experience regarding pricing and costs for Kali Linux?
My experience with pricing, setup cost, and licensing for Kali Linux has been that it was free to use.
What needs improvement with Kali Linux?
I think Kali Linux is good, but there is a widespread misunderstanding related to Kali Linux because many people believe Kali Linux is a tool for hackers and that anything can be hacked using it. T...
What do you like most about Security Onion?
The most valuable feature of Security Onion for security monitoring is its ability to find infected ports.
What is your experience regarding pricing and costs for Security Onion?
Security Onion is an open-source solution. On a scale from one to ten, where ten is expensive and one is cheap, I rate the solution's pricing a six out of ten.
What needs improvement with Security Onion?
The initial setup of the solution is a little bit difficult.
 

Comparisons

 

Overview

Find out what your peers are saying about Kali Linux vs. Security Onion and other solutions. Updated: June 2025.
884,873 professionals have used our research since 2012.