Private Packagist is an enterprise offering from Packagist, the central repository for PHP packages. It enables organizations to manage and host private PHP packages, as well as mirror open-source dependencies from Packagist.org, ensuring a more secure and reliable supply chain. This service is geared towards teams that require robust access controls, efficient package management, and integration with existing CI/CD pipelines. The platform also provides insights and analytics to help developers manage their projects effectively.