Recombee

Recombee is an AI-powered real-time recommender system offered as a service. While it doesn't provide a full content publishing platform like Medium, its core offering of a 'Distribution & Recommendation Engine' is a direct match. It also offers 'Reader Engagement Metrics' through its analytics and 'Search & Discovery' features. The 'Tags & Topics' feature is supported through its 'Item Segmentations' which allows for recommending categories and tags. It does not offer a rich text editor, membership monetization, or community feedback tools, as it is a backend service for personalization rather than a full publishing platform.