WooCommerce core gives you one stock number per product — a single _stock meta value with no concept of where that stock physically sits. If you run two or more warehouses, that single number forces manual reconciliation, oversells from depleted locations, and shipping quotes that ignore which warehouse will actually fulfill the order.

WooCommerce Multi-Warehouse Inventory replaces that single counter with per-location stock ledgers per SKU. Each warehouse is a custom post type record (address, geo-coordinates, priority, enabled regions). Stock is stored in a dedicated custom table keyed by product/variation ID and warehouse ID, so availability is resolved per location rather than globally — and it stays accurate under HPOS / custom order tables because allocation writes against the order, not fragile post meta.

At checkout, a nearest-warehouse routing engine geocodes the customer's shipping address and scores each warehouse by distance, stock availability and your configured priority — then allocates the order to the best fit. When no single warehouse can cover the cart, split-shipment handling divides the order across locations and exposes each fulfillment leg in wp-admin and the REST API. Location-based shipping cost calculation plugs into the WooCommerce shipping framework (a custom shipping method plus woocommerce_package_rates filtering) so the rate reflects the warehouse that actually ships each package.

Everything is exposed through WordPress hooks, actions and filters and WooCommerce REST API endpoints, so your WMS, ERP or 3PL can read and adjust per-location stock programmatically. Low-stock recalculation runs on WP-Cron.

This is a build-to-order plugin. ECOSIRE scopes it to your catalog, warehouse list and shipping rules, then builds, installs and configures it on your WordPress site — including data migration of your existing stock into per-location ledgers. It is not an instant marketplace download; you get a plugin engineered for your store and a team that supports it.