CoreOS is an open-source lightweight operating system based on the Linux kernel and designed for providing infrastructure to clustered deployments, while focusing on automation, ease. Developed by CoreOS, Inc
License: Free
CoreOS is optimized for containerized applications with a focus on automatic updates and immutability, making it ideal for cloud-native environments. In contrast, NixOS offers a powerful declarative configuration model and package management system, providing flexibility and reproducibility but requiring a deeper understanding from users.