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
Gentoo is a highly customizable Linux distribution aimed at advanced users who prefer a rolling release model, while CoreOS is designed for running containerized applications with an emphasis on security and simplicity. Gentoo requires more hands-on management and technical expertise, whereas CoreOS offers automated updates and a minimalistic approach.