What is a 3PL?

A 3PL (Third-Party Logistics) provider is an outsourced partner that handles physical supply chain operations for ecommerce merchants, including:

  • Freight Receiving: Unloading factory pallets and scanning items into bin locations.
  • Warehousing & Storage: Securely storing product inventory across strategic regional centers.
  • Order Picking & Packing: Assembling ordered SKUs into shipping boxes upon order placement.
  • Carrier Shipping: Leveraging discounted bulk rates with carriers (FedEx, UPS, DHL).
  • Reverse Logistics: Inspecting and processing customer returns.

Famous 3PL Examples

  • ShipBob: Tech-enabled 3PL specializing in D2C ecommerce stores.
  • Flexport / Shopify Fulfillment Network: Enterprise global logistics networks.
  • Amazon Multi-Channel Fulfillment (MCF): Amazon’s fulfillment arm shipping orders placed on non-Amazon storefronts.

Common Confusion

Developer Takeaway

Fulfillment Service API Integration: In Shopify and custom platforms, register 3PL partners as a FulfillmentService entity. When an order is paid, the platform sends a automated JSON payload to the 3PL's webhook URL to initiate fulfillment automatically.