3PL / WMS

Warehouse management for modern 3PLs

Warehouse Management System (WMS) for Modern 3PL Operations

Built for High-Volume Ecommerce and Retail Fulfillment

Left Foot Software provides warehouse management functionality designed for third-party logistics providers (3PLs) supporting ecommerce brands, retailers, marketplaces, and EDI-driven wholesale operations.

Our platform combines warehouse operations, order management, inventory control, retailer compliance, and shipping workflows into a single system built specifically for high-SKU environments such as apparel, footwear, accessories, and consumer goods.

Whether you are shipping DTC orders, retail replenishment, drop ship orders, or marketplace fulfillment, the system is designed to simplify warehouse operations while maintaining the flexibility required by modern 3PL environments.

Talk to us about 3PL deployment

Shopify Integration

Left Foot Software includes a comprehensive Shopify integration designed to support high-volume ecommerce and omnichannel fulfillment workflows.

The integration supports:

  • Real-time Shopify order import
  • Inventory synchronization
  • Shipment and tracking updates
  • Multi-store management
  • Multi-brand fulfillment
  • Shopify returns workflows
  • Partial shipment support
  • Backorder workflows
  • Shopify barcode and product synchronization
  • Support for Shopify-based omnichannel operations

The platform is commonly used by 3PLs and brands operating across DTC, marketplace, wholesale, and retailer drop ship channels where Shopify serves as one of several connected commerce platforms.

Core Warehouse Functionality

End-to-end warehouse capabilities for high-SKU, multi-channel operations.

Inventory Management

  • Real-time inventory visibility across multiple warehouses and clients
  • Bin/location-level inventory tracking
  • RFID EPC serial tracking support
  • Barcode-driven receiving, transfers, picking, and cycle counts
  • Inventory adjustments and audit history
  • Multi-client inventory segregation
  • Inventory allocation rules by client, channel, or order type

Receiving & Warehouse Operations

  • ASN and purchase order receiving
  • Mobile barcode scanning workflows
  • Carton and pallet receiving
  • Variance reporting and exception handling
  • Cross-docking support
  • Inventory transfers between locations
  • Warehouse activity tracking and audit history

Pick, Pack & Ship

  • Batch, wave, and order-based picking
  • Single-order and bulk fulfillment workflows
  • Pick-to-cart and scan validation
  • Packing station workflows
  • Shipping label generation
  • Cartonization and packing slip generation
  • UCC-128 / GS1-128 label support
  • Multi-package shipment support
  • Shipment tracking updates

Returns Management

  • Returns receiving and inspection workflows
  • Multiple return disposition statuses
  • Restock, quarantine, damaged, and customer return classifications
  • Barcode-driven return processing
  • Inventory adjustment and restocking workflows
  • Return reason tracking and reporting
  • Client-specific return handling rules
  • Support for refurbishment and re-packaging workflows

Omnichannel & Marketplace Integration

Left Foot Software supports omnichannel fulfillment workflows across ecommerce platforms, marketplaces, retailer drop ship networks, and wholesale ordering platforms.

Ecommerce Platform Integration

  • Shopify
  • BigCommerce
  • Magento / Adobe Commerce
  • WooCommerce
  • Custom ecommerce platforms via API

Marketplace & Retailer Network Integration

  • Amazon
  • Rithum / DSCO
  • CommerceHub
  • OrderStream
  • Mirakl marketplace integrations

Wholesale & B2B Platform Integration

  • NuORDER
  • JOOR
  • EDI-integrated wholesale workflows
  • Retailer drop ship programs
  • Marketplace fulfillment workflows

Integration Capabilities

  • Real-time order import
  • Inventory synchronization
  • Shipment and tracking updates
  • Multi-channel inventory allocation
  • Client-specific routing and fulfillment rules
  • API and EDI-based integration workflows

Designed for brands and 3PLs managing inventory and fulfillment across multiple sales channels, retailer programs, and wholesale platforms from a centralized operational workflow.

EDI & Retail Compliance

Many warehouse systems handle ecommerce well but struggle with retail compliance. Left Foot Software was built with both in mind.

Warehouse EDI Interface Support

Support for common warehouse and 3PL transaction sets including:

  • 940 Warehouse Shipping Orders
  • 943 Warehouse Stock Transfer Ship Advice
  • 944 Warehouse Stock Transfer Receipt Advice
  • 945 Warehouse Shipping Advice
  • 846 Inventory Inquiry / Advice
  • 947 Inventory Adjustment Advice
  • Custom warehouse integration workflows

Retailer & Trading Partner EDI Support

Support for retailer, wholesale, and drop ship workflows including:

  • 850 Purchase Orders
  • 855 Purchase Order Acknowledgements
  • 856 Advance Ship Notices (ASN)
  • 810 Invoices
  • 860 Purchase Order Changes
  • 846 Inventory Feeds
  • Retail drop ship workflows
  • Store distribution support (SDQ)

Retail Compliance Features

  • UCC-128 carton labels
  • SSCC-18 generation
  • Retail routing guide workflows
  • Carton and pallet manifests
  • Retail packing validation
  • Department store compliance workflows

Supported retailer and channel workflows include department stores, drop ship programs, wholesale distribution, and marketplace integrations.

RFID Support

Support for RFID-enabled operations including:

  • GS1 EPC encoding workflows
  • RFID carton and item labeling
  • RFID scan validation
  • Support for retailer RFID compliance initiatives

Designed for apparel and footwear operations where RFID adoption is increasingly required.

Designed for Multi-Client 3PL Operations

The platform supports:

  • Multiple warehouse clients
  • Client-specific workflows and rules
  • Client billing and storage fee calculation
  • Transaction-based billing support
  • Role-based permissions
  • Customer portals and reporting
  • Separate branding and operational controls by account

Shipping & Carrier Integration

Support for parcel, freight, and shipping middleware integrations including:

  • UPS
  • FedEx
  • USPS
  • EasyPost
  • Stamps.com
  • ShipHub
  • FreightPOP
  • Freight Innovation
  • AfterShip

Additional functionality includes:

  • Rate shopping
  • Multi-package shipment support
  • Shipment tracking updates
  • Customer notification workflows
  • Client carrier account support
  • Parcel and freight workflow integration

Flexible Deployment

  • Cloud hosted
  • Browser-based access
  • Mobile warehouse scanning support
  • API-first architecture
  • Custom integrations available

Why Left Foot Software

Unlike generic warehouse systems, Left Foot Software was developed through years of real-world retail, ecommerce, EDI, and warehouse operations experience.

The system is designed for operations that need:

  • Strong Shopify integration
  • Retail compliance
  • High-SKU inventory management
  • Flexible workflows
  • Multi-channel fulfillment
  • Omnichannel integration
  • 3PL scalability without enterprise ERP complexity

Whether you are operating a growing fulfillment warehouse or supporting complex retail and ecommerce workflows for multiple brands, Left Foot Software provides the operational foundation to scale efficiently.