The KLCP exam itself does cost $299, but the Kali Linux Operating System, the Kali Linux Revealed book and the Kali Linux Revealed self-paced online course are free.

Is Kali Linux free?

Kali Linux Features

Free (as in beer) and always will be: Kali Linux, like BackTrack, is completely free of charge and always will be. You will never, ever have to pay for Kali Linux.

Is Kali Linux illegal?

Kali Linux is an operating system just like any other operating system like Windows but the difference is Kali is used by hacking and penetration testing and Windows OS is used for general purposes. … If you are using Kali Linux as a white-hat hacker, it is legal, and using as a black hat hacker is illegal.