Embodiments of the present invention relate to aggregating product information from a variety of sources to generate user interfaces that allow users to navigate and discover products. Product information is aggregated from both feed and crawl sources, and product entities are identified within the aggregate product information. In some embodiments, product entities are associated with product classes, and product class detail pages are generated that include product entities within each product class and allow users to view correlations between those produce entities. In some embodiments, relationships are identified between product entities. When a user selects to view information for a given product entity, information is provided indicating similar product entities that have a relationship with the given product entity.