Feather

Feather is a platform that allows users to create blogs and newsletters from Notion content. It offers features like a rich text editor (through Notion integration), detailed analytics for reader engagement, community feedback tools (comments), user profiles and following, tags, email newsletter integration, mobile app access (implied by being a web platform with mobile optimization), social sharing, and search functionality. While it doesn't directly have a membership monetization model like Medium, it facilitates content creation and distribution, which aligns with the core idea.