Nitrux is a Linux distribution for technical workstations built on an immutable base, meaning the core system is not modified in normal use. According to its website, it is powered by OpenRC, the MauiKit application framework, the NX AppHub for applications and the Hyprland compositor, and it is built from Debian. It ships as a downloadable live image that users install on their own computers; there is no vendor-hosted service involved.
Nitrux is developed by Nitrux Latinoamericana S.C., a company based in Mexico that was founded in 2012. It is open-source software, and parts of its tooling are published under the BSD-3-Clause licence on GitHub. Because the system runs entirely on your own hardware, it sends no customer data to a vendor cloud by design, and a European organisation chooses its own update mirrors and storage. The vendor is based outside the EU and US, so assess support and long-term maintenance before production use.