3pl wms system 3PL WMS system refers to the warehouse management system used by third-party logistics providers to manage inventory, order fulfillment, and shipping. These systems allow e-commerce businesses to outsource storage and logistics while maintaining visibility through real-time dashboards and integration with online stores. Features often include barcode scanning, batch picking, inventory forecasting, and returns processing. A robust 3PL WMS improves efficiency, reduces fulfillment errors, and supports scalability for growing businesses without owning physical warehouse space.