PureOS is a Debian-family Linux distribution based on Debian Testing. FSF-certified 100% free software OS respecting user privacy, security, and digital freedom.
Strengths: Officially endorsed by Free Software Foundation; Supports convergent mobile/desktop interface (Librem 5); Zero telemetry or commercial telemetry. Trade-offs: Won't run without compatible open-source hardware (no Broadcom Wi-Fi or NVIDIA proprietary).