CentOS is a Linux distribution that attempts to provide a free, enterprise-class, community-supported computing platform. Developed by The CentOS Project
License: Open Source
Gentoo is a source-based, highly customizable Linux distribution ideal for users who want to optimize performance and stay on the cutting edge of software. In contrast, CentOS is a stable, enterprise-focused distribution designed for production environments, providing long-term support and a predictable release cycle.