Launch HN: Convictional (YC W19) – Supplier Network for Retailers Hey HN, We’re Roger and Chris, co-founders of Convictional ( https://ift.tt/35bqMeK ). Convictional makes it possible for online retailers to find, onboard, and integrate with third-party suppliers. We do this by connecting them to a network of suppliers that manage the inventory and ship those products directly to the end consumer on their behalf. The idea behind Convictional starts when Roger worked at GNC, a large natural health products retailer, at the age of 17. One of the biggest challenges was onboarding. As a retailer, you either buy inventory or dropship from third-parties. They decided to expand their catalog by selling some products that were shipped directly by the supplier. To do this, GNC required both sides to implement EDI (an old school, pre-internet data format for exchanging information between business systems) or manually exchange flat files for things like inventory, orders, and product information...