Tails is described as 'The Amnesic Incognito Live System (Tails) is a Debian 9 based live CD/USB with the goal of providing complete Internet anonymity for the user. The product ships with several Internet applications, including web browser, IRC client, mail client' and is a very popular Linux Distro in the security & privacy category. There are more than 100 alternatives to Tails for a variety of platforms, including Linux, Self-Hosted, Windows, BSD and Mac apps. The best Tails alternative is Qubes OS, which is both free and Open Source. Other great apps like Tails are Whonix, Kali Linux, Parrot Security OS and Alpine Linux.
Linspire is a 64 bit Linux based OS, that is geared towards the business, education and government worker. It has all the applications business users will need for work, research and deployment among very high end desktop systems.
Linspire is the most popular commercial alternative to Tails.
Knoppix is an operating system based on Debian designed to be run directly from a CD / DVD (Live CD) or a USB key (Live USB), one of the first of its kind for any operating system. When starting a program, it is loaded from the removable medium and decompressed into a RAM drive.
EasyOS is an experimental Linux distribution that uses many technologies and package formats pioneered by Puppy Linux .
Free portable encrypted system on an usb flash drive or an external hard drive for safe editing and carrying along of sensitive data, for encrypted communication and anonymous web surfing.
Founded in 2014 by Oliver Pinter and Shawn Webb, HardenedBSD is a security-enhanced fork of FreeBSD. The HardenedBSD Project is implementing many exploit mitigation and security technologies on top of FreeBSD.
Redox is a Unix-like Operating System written in Rust, aiming to bring the innovations of Rust to a modern microkernel and full set of applications.
Liberté Linux is a secure, lightweight, and easy to use Gentoo-based Linux distribution intended as a communication aid in hostile environments. Liberté installs on a USB key, and boots on any computer or laptop.
MINIX is a POSIX-compliant Unix-like operating system based on a tiny microkernel running in kernel mode with the rest of the operating system running as a number of isolated, protected, processes in user mode.
MINIX 3 is the most popular Mac alternative to Tails.
A Fast, friendly, open-source operating system, for newbies, geeks & DIY enthusiasts.
A project providing a fully free (as in freedom) derivative of Arch Linux. Inheriting Arch's lightweight and flexibility, Parabola offers software freedom plus all power to the users.
ALT Linux is a set of RPM-based, APT-managed operating systems built on top of the Linux kernel and Sisyphus package repository branches. ALT Linux Rescue is, well, the disaster recovery tool.
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ALT Linux is a generic Linux distro that does not come out of the box with Tor routing all network traffic - which is the primary feature of Tails.