PentestBox is described as 'Opensource PreConfigured Portable Penetration Testing Environment for the Windows Operating System that allows users to use it without any virtual machine. It has got maximum of Kali Linux tools in it. And it requires very less space'. There are six alternatives to PentestBox for a variety of platforms, including Windows, Linux, Mac, Android and iPhone. The best alternative is PowerShell, which is both free and Open Source. Other great apps like PentestBox are Cygwin (Free, Open Source), Termux (Free, Open Source), Windows Terminal (Free) and Alacritty (Free, Open Source).
PowerShell (including Windows PowerShell and PowerShell Core) is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language built on the .NET Framework.
Cygwin is a Unix-like environment and command-line interface for Microsoft Windows. Cygwin provides native integration of Windows-based applications, data, and other system resources with applications, software tools, and data of the Unix-like environment.
Alacritty is a blazing fast, GPU accelerated terminal emulator. It’s written in Rust and uses OpenGL for rendering to be the fastest terminal emulator available. Alacritty is available on GitHub in source form.