Incumbents Use Stores as Fulfillment

The winning grocery delivery model is usually the one that reuses assets that already exist, not the one that builds a second retail network from scratch. Incumbents already have stores near demand, stocked shelves, wholesale buying power, and staff who know how to run perishables. That lets them add fast delivery as an extra layer on top of an existing grocery business, while ultrafast startups have to pay for rent, inventory, pickers, and couriers inside a stand alone dark store model from day one.

• Instacart scaled by routing demand into existing grocers rather than owning inventory itself. Its model used partner stores as the warehouse and store staff systems as the base layer, which is why it could reach scale faster and with less capital than dark store operators like Gopuff, Gorillas, and Getir.
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• The cost problem in ultrafast grocery is simple, each order carries both delivery labor and picking labor, and fresh inventory adds spoilage risk. Internal interviews show that convenience orders also tend to have lower basket sizes, which makes it harder for dark stores to spread those fixed costs over each order.
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• The incumbent playbook is now visible across the market. DoorDash launched grocery in 2020 and added chains like ALDI through its existing courier and membership network. Uber expanded grocery through the same pattern. Walmart uses its 4,600 plus stores and delivery infrastructure as the backbone for pickup, delivery, and faster fulfillment.
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Going forward, fast grocery looks less like a new category and more like a feature layered onto large retail and delivery networks. The companies best positioned to win are the ones that can turn stores into local fulfillment nodes, bundle grocery with memberships and other categories, and use existing volume to make each marginal order cheaper.