View Backtrack Linux's top competitors like Arch Linux, BackBox.org, and BlackArch Linux.
Ubuntu is a community developed operating system that is perfect for laptops, desktops and servers. Ubuntu is and always will be free of charge. You do not pay any licensing fees. You can download, use and share Ubuntu with your friends, family, school or business for absolutely nothing.
UK
Private
$87M Revenue
http://www.ubuntu.com
314 Employees
The Fedora Project is open and anyone is welcome to join. Fedora is a Linux-based operating system that showcases the latest in free and open source software. Fedora is always free for anyone to use, modify, and distribute. It is built by people across the globe who work together as a community: the Fedora Project.
Plymouth, Minnesota, US
Non profit
$97.8M Revenue
http://www.getfedora.org
284 Employees
Creating, developing and maintaining the Kali Linux penetration testing distribution while keeping it open-source and free for all.
New York City, New York, US
Non profit
http://www.kali.org
366 Employees
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