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OffSec

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258 reviews
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Average star rating
4.6
Serving customers since
2006
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Kali Linux

242 reviews

Kali Linux is an open-source, Debian-based distribution tailored for advanced penetration testing and security auditing. It offers a comprehensive suite of tools and configurations, enabling users to focus on their security tasks without the need for extensive setup. Kali Linux is accessible across multiple platforms and is freely available to information security professionals and enthusiasts. Key Features and Functionality: - Extensive Toolset: Provides hundreds of pre-installed tools for various information security tasks, including penetration testing, security research, computer forensics, reverse engineering, vulnerability management, and red team testing. - Multi-Platform Support: Compatible with various platforms, ensuring flexibility and adaptability for different user needs. - Cloud Integration: Available as an Amazon Machine Image on AWS Marketplace, allowing users to deploy Kali Linux instances in the cloud efficiently. Primary Value and User Solutions: Kali Linux addresses the critical need for a robust and comprehensive security testing environment. By offering a vast array of tools and configurations out of the box, it enables security professionals to conduct thorough assessments, identify vulnerabilities, and strengthen defenses without the overhead of manual tool integration. Its availability on platforms like AWS further enhances its utility by providing scalable and on-demand access to a powerful security testing environment.

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OffSec

15 reviews

The Penetration Testing with Kali Linux (PWK/PEN-200) online ethical hacking course is self-paced. It introduces penetration testing tools and techniques via hands-on experience. PEN-200 trains not only the skills, but also the mindset required to be a successful penetration tester. Students who complete the course and pass the exam earn the Offensive Security Certified Professional (OSCP) certification. This course features five recently retired OSCP exam machines now added to the PWK labs. These five machines represent an entire OSCP exam room.

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Offensive Security Testing Services

1 review

Secure your career in information security. Level up in penetration testing, web application security, or network security with the team behind Kali Linux and the OSCP certification: Offensive Security.

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OffSec Reviews

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Nidhi S.
NS
Nidhi S.
Scientific Project Manager | Pharma & Biotech R&D | GMP • GLP • CAPA | SAP | Oncology & Cell Therapy
05/14/2026
Validated Reviewer
Review source: Organic

Best OS for Ethical Hacking, Simple Yet Powerful

I find Kali Linux to be the best OS for ethical hacking. It's easy to install and use, which I really appreciate. The operating system is clean, and I like the easy folder management. It's basically a clean Ubuntu OS, which can be started in any VM, making it very versatile. The initial setup is as simple as plug and play, which is fantastic.
Debjit G.
DG
Debjit G.
05/14/2026
Validated Reviewer
Review source: Organic

Purpose-Built for Network Security, Not for Everyday Use

I like how Kali Linux handles all the versioning and library conflicts. After installation, there is an environment where every tool is tested to work with others. The Kali maintainers push updates and test how tools interact, ensuring that if an update to a core library would break another major tool, the team holds the update or patches the tool first. It's easy to install using a Debian wizard, which is really convenient.
AG
Alex G.
05/10/2026
Validated Reviewer
Review source: Organic

Essential OS for Penetration Testing

I really like Kali Linux for its focus on penetration testing, as it comes with a lot already installed, making it solid for quick local testing. The community support is huge, allowing me to quickly install and deploy solutions without wasting time on misconfigurations. This support, along with comprehensive libraries and documentation, helps me focus more on SIP-related testing. Its design in a WORM fashion makes it simple for other developers on my team to follow documentation and deploy a standard environment, which is very efficient. The time saved is precious, and Kali Linux's setup enables me to ship a golden image of supports or provide clear documentation for building and deploying a local testing environment.

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New York, US

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What is OffSec?

Empowering the world to fight cyber threats with indispensable cybersecurity skills and resources. Build the path to a secure future with OffSec.

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Year Founded
2006
Website
www.offsec.com