ButterCMS

ButterCMS is a headless CMS that allows users to create, manage, and publish content across various digital channels. While it doesn't directly offer a public-facing platform for writers and readers like Medium, it provides the underlying tools for building such a platform. It explicitly mentions a rich text editor, blog engine capabilities, and features for managing content, which aligns with the core functionalities of a publishing platform. The platform also supports user profiles, tags, and social sharing, which are relevant to content distribution and engagement. However, it lacks direct features for monetization based on reading time or a built-in recommendation engine for readers, as it's a backend content management system.