Tails is a live operating system that you can start on almost any computer from a DVD, USB stick, or SD card. It aims at preserving your privacy and anonymity.
License: Open Source
Puppy Linux is a lightweight and highly customizable Linux distribution, ideal for older hardware and users who require a fast system with persistence capabilities. In contrast, Tails is focused on privacy and security, utilizing the Tor network to provide anonymity and is best suited for users needing a secure environment for sensitive tasks.