Directed Edge - HomeDirected Edge's plugin for Shopify delivers half a million recommendations per day. Our app makes it easy to import your shop's data, and offers many advanced recommendations features. Recommendation types: Related products: Shows products that are related to the product currently being viewed by the customer Shopping cart recommendations: Shows products related to those currently in the customer'
https://jp.techcrunch.com/2009/08/07/20090806yc-funded-directed-edge-sees-a-post-search-web-where-recommendations-rule/
