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Debian vs Kali Linux 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
6.5
Debian users save money through no license costs, reduced maintenance, and efficiency, with some saving up to 60%.
Sentiment score
6.2
Kali Linux improves vulnerability testing, offering cost-effective security benefits through AWS deployment and open-source tools for businesses.
There were direct cost savings since Debian has no licensing fees, and we did not require paid support, so it saved us considerable money.
Embedded Linux / BSP Engineer at Veethree
We were able to save a substantial amount by using Linux instead of Windows and spending a lot of money on Windows licenses.
Cybersecurity Engineer at a tech consulting company with 51-200 employees
I have seen a return on investment; specifically, the cost is around zero because there is no need for a license, and since my whole team uses Debian, we are fine with the number of employees needed.
DevOps Technology Lead at TriStratus Ltd
Integrating Kali Linux with DevOps tools has resulted in reduced operational costs due to automated test cases, making it a worthwhile investment with significant returns by decreasing the attack surface area and the frequency of attack incidents.
SWE-1 at a tech vendor with 10,001+ employees
If we had installed it on-premises or through other means, it would have incurred significant money and effort to create the VMs, deploy it on machines, and then delete and format it after use.
Cloud Security Architect at a tech services company with 10,001+ employees
I have saved time by avoiding the lag I sometimes face on the TryHackMe in-built machine, and I have learned more efficiently.
Associate Consultant at a consultancy with 10,001+ employees
 

Customer Service

Sentiment score
6.7
Debian's community support effectively aids users through forums and documentation, minimizing the need for official customer service.
Sentiment score
5.2
Kali Linux provides strong community support and documentation but lacks direct customer support, relying on user self-research.
We rely on community resources for support, such as documentation, forums, and asking questions online.
Cybersecurity Engineer at a tech consulting company with 51-200 employees
Whenever I had a query, I used Google to search for it and found very helpful information from public platforms.
Cloud Engineer at a consultancy with 11-50 employees
While it does not have traditional paid customer support like some commercial distributions, the Debian community and documentation are very strong.
Embedded Linux / BSP Engineer at Veethree
Since most of the tools and other things are community-based, the documentation and other community support are very good.
Cloud Security Architect at a tech services company with 10,001+ employees
I was able to solve the problems I was experiencing.
Product security engineer at a tech vendor with 10,001+ employees
 

Scalability Issues

Sentiment score
7.1
Debian offers scalability and stability, ideal for cloud environments, with open-source benefits and effective management of high traffic.
Sentiment score
7.5
Users find Kali Linux scalable and flexible, supporting diverse platforms, ideal for penetration testing and educational purposes.
We don't spin up new Debian instances arbitrarily.
Cybersecurity Engineer at a tech consulting company with 51-200 employees
As the growth of our infrastructure is required, we can host many Debian servers.
Cloud Engineer at a consultancy with 11-50 employees
We decided to use Debian because we needed a more stable and predictable base, especially for long-running systems where frequent changes or upgrades could cause issues.
Embedded Linux / BSP Engineer at Veethree
You can use it on cloud, VPS, and on-premises.
Security Researcher at a consultancy with 10,001+ employees
I would describe Kali Linux's scalability as very scalable because I can deploy it on a range of different machines, whether that is my laptop or using maybe Raspberry Pi or Android.
Enterprise Cloud Operations Lead at a tech vendor with 10,001+ employees
Regarding the scalability of Kali Linux for my work and projects, whenever I was conducting brute force attacks and provided more than two or three million lines of payload, the system would freeze.
Product security engineer at a tech vendor with 10,001+ employees
 

Stability Issues

Sentiment score
8.5
Debian is valued for stability and reliability, ideal for developers prioritizing long-term support over rapid updates.
Sentiment score
8.0
Kali Linux is praised for stability and dependability, recommended for virtualization, with occasional issues resolved using older versions.
I rate Debian an eight out of ten because it excels in stability, reliability, and package management, which are very important for long-running production systems.
Embedded Linux / BSP Engineer at Veethree
That long-term support has helped me and my customers by being stable and running well.
Embedded Developer at a tech vendor with 10,001+ employees
In my experience, Debian is very stable.
Cybersecurity Engineer at a tech consulting company with 51-200 employees
Due to the huge user base that uses it, it is kept up to date regularly.
Enterprise Cloud Operations Lead at a tech vendor with 10,001+ employees
Kali Linux is stable for my use cases, though not the latest version.
Product security engineer at a tech vendor with 10,001+ employees
Kali Linux is very stable for my needs.
Consultant at Cognizant
 

Room For Improvement

Debian needs improvements in package management, installer, cloud integration, hardware support, GUI updates, and contributor support for better usability.
Kali Linux users seek better automation, UI, security, and support, with improved installation, hardware detection, and beginner-friendly resources.
I believe security on Debian is top-notch due to its long history and the many individuals and organizations that rely on it, meaning there are many eyes on it.
Founder at a media company with 1-10 employees
If Debian had a memory-based distribution, similar to Alpine, that would be great, as we could get benefits in terms of memory or embedded systems.
DevOps Technology Lead at TriStratus Ltd
Debian was easy to set up.
Cloud Engineer at a consultancy with 11-50 employees
If real-time customized port scanning can be added, for example, instead of a default port such as 8080 or 443, if we can use a customized port such as 9876, that capability would be great.
Senior Technical Manager at a tech vendor with 10,001+ employees
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.
Senior Solution Architect & Delivery Lead at a tech services company with 10,001+ employees
If there were video courses attached to how to safely use it, especially for absolute beginners with no previous experience using Linux operating systems, I think that could be very useful.
Enterprise Cloud Operations Lead at a tech vendor with 10,001+ employees
 

Setup Cost

Debian's open-source nature offers cost savings on software, making it a cost-effective alternative to Microsoft Windows and Ubuntu.
Kali Linux is a cost-effective, open-source solution for enterprises seeking a comprehensive operating system with no licensing costs.
My experience with Debian's pricing, setup cost, and licensing has been that it is all free.
IT Support Manager at a educational organization with 5,001-10,000 employees
As long as I remain within the limit of that credit, I can create machines as much as I want without exceeding the monthly limit.
Cybersecurity Engineer at a tech consulting company with 51-200 employees
My experience with pricing, setup cost, and licensing is quite favorable; since Debian is totally free, it is one of my first options.
DevOps Technology Lead at TriStratus Ltd
Kali Linux is free software, an operating system that's available to download without any cost or licensing fees.
Associate Consultant at a consultancy with 10,001+ employees
I simply create a VM, so there are no costs involved.
Senior Solution Architect & Delivery Lead at a tech services company with 10,001+ employees
My experience with pricing, setup costs, and licensing for Kali Linux has been positive, as it operates under an open-source model.
SWE-1 at a tech vendor with 10,001+ employees
 

Valuable Features

Debian offers stability, flexibility, and efficiency, providing cost-effective operations with strong support and extensive software options for organizations.
Kali Linux is favored for its pre-installed security tools, user-friendly design, and customizable features for efficient cybersecurity tasks.
Debian's stability helps me in my daily work because my work relies on stability; I'm trying to deploy production workloads, and Debian offers that stability for me.
DevOps Technology Lead at TriStratus Ltd
Debian has kept my workflow secure by maintaining system stability with day-to-day or monthly updates with security patches, securing the system from external attacks.
Cloud Engineer at a consultancy with 11-50 employees
Debian has positively impacted my organization primarily in cost-efficiency, with on-premises hardware running faster and cheaper.
IT Support Manager at a educational organization with 5,001-10,000 employees
Kali Linux has positively impacted my organization by improving efficiency in penetration testing; its open-source nature permits extensive customization and inclusion of numerous comprehensive pre-installed tools, contributing to a secure network environment with effective monitoring of network applications.
SWE-1 at a tech vendor with 10,001+ employees
A unique and really helpful feature of Kali Linux, compared to other operating systems, is that many of the offensive security tools are already pre-configured and pre-installed.
Product security engineer at a tech vendor with 10,001+ employees
Kali Linux positively impacts my organization by allowing us to monitor changes and security posture for the company.
Consultant at Cognizant
 

Categories and Ranking

Debian
Ranking in Operating Systems (OS) for Business
14th
Average Rating
8.6
Reviews Sentiment
6.6
Number of Reviews
12
Ranking in other categories
No ranking in other categories
Kali Linux
Ranking in Operating Systems (OS) for Business
10th
Average Rating
8.6
Reviews Sentiment
6.9
Number of Reviews
26
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Operating Systems (OS) for Business category, the mindshare of Debian is 5.5%, up from 0.6% compared to the previous year. The mindshare of Kali Linux is 3.2%, up from 1.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Operating Systems (OS) for Business Market Share Distribution
ProductMarket Share (%)
Kali Linux3.2%
Debian5.5%
Other91.3%
Operating Systems (OS) for Business
 

Featured Reviews

Badal Shrivastav - PeerSpot reviewer
Embedded Linux / BSP Engineer at Veethree
Reliable platform has supported long-term on-prem deployments and predictable OTA updates
If I consider how Debian can be improved, it could be more accessible in making newer software versions available for users who need recent features while still maintaining default stable behavior. While backports help, the workflow could be streamlined. The release cycle can feel slow for rapidly evolving tools, and better guidance around mixing stable, backports, and testing would help. Regarding hardware support, Debian can be improved by supporting multiple BSPs, making it more versatile in the embedded domain. Hardware support for new devices can sometimes lag behind, which is understandable given Debian's focus on stability. Clearer guidance on handling newer hardware or firmware would be beneficial.
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.
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Top Industries

By visitors reading reviews
Comms Service Provider
17%
Manufacturing Company
10%
Educational Organization
9%
Computer Software Company
7%
University
14%
Comms Service Provider
13%
Educational Organization
11%
Computer Software Company
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise2
Large Enterprise4
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise2
Large Enterprise16
 

Questions from the Community

What is your experience regarding pricing and costs for Debian?
My experience with pricing, setup cost, and licensing seems acceptable. We have also used Ubuntu. Comparing to Ubuntu, Debian is cheaper.
What needs improvement with Debian?
In terms of improvements, I think Debian is fine as it is. I'm not an expert, so for me, it is acceptable.
What is your primary use case for Debian?
I have been using Debian for a while now. My main use case for Debian is running PostgreSQL and related infrastructure. A specific example of an application I'm running on Debian is PostgreSQL.
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...
 

Comparisons

 

Also Known As

Debian 12
No data available
 

Overview

Find out what your peers are saying about Debian vs. Kali Linux and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.