Mighty Networks

Mighty Networks is a strong match for the concept of an online publishing platform with community features. It offers robust tools for creating and managing content (courses, events, posts), fostering community engagement through various interactive features, and providing monetization options. While it doesn't explicitly focus on 'long-form articles' in the same way Medium does, its content creation capabilities and community-driven approach align well. The platform supports membership monetization, user profiles, community feedback, and mobile access, covering many of the 'must-have' and 'other' features. The primary difference is its emphasis on community and courses over general article publishing.