Heartbeat

Heartbeat is a platform designed for building and managing online communities, which aligns with the broader concept of an online publishing platform in terms of content sharing and community engagement. While it doesn't focus solely on long-form articles like Medium, it provides tools for content creation (documents with rich text editor), community interaction (discussions, events), and monetization (payments, subscriptions). It also supports user profiles, tagging, and mobile access. The core difference is its emphasis on community features (chats, courses, events) rather than primarily article publishing and a recommendation engine for external content.