TrueOS (PC-BSD or PCBSD), is a Unix-like, desktop-oriented operating system built upon the most recent releases of FreeBSD-CURRENT. Developed by iXsystems
License: Open Source
TrueOS is a lightweight and security-focused operating system primarily aimed at advanced users, while Ubuntu is a user-friendly and widely supported Linux distribution suitable for beginners. TrueOS excels in performance and customization, whereas Ubuntu offers a vast software repository and an active community.