To efficiently manage a Shopify multi vendor marketplace, it's essential to use the best multi vendor app for Shopify that supports automated shipping workflows. Apps like Calcurates, Onport (formerly Jetti), and ShipTurtle offer comprehensive features for vendor-specific shipping rates, multi-origin handling, and fulfillment automation. Calcurates stands out by syncing vendor data, assigning rates per origin, and calculating split shipments in real-time—making it ideal for marketplaces needing accurate, scalable shipping solutions.