Walmart Adds 8 More Parcel Carriers for Seller-Fulfilled Shipping

Walmart has approved eight additional parcel carriers for seller-fulfilled shipping on its marketplace, letting businesses that handle their own deliveries use DoorDash, UniUni and other providers instead of relying on a narrow, retailer-approved list.

The change touches the logistics layer behind Walmart Marketplace, where third-party sellers list goods alongside Walmart's first-party retail. Under seller-fulfilled shipping — sometimes called seller-fulfilled delivery — the merchant, not the marketplace, controls the parcel's journey from warehouse shelf to customer door.

For Walmart, the stakes are channel power. Every carrier it approves widens the menu for sellers weighing whether to fulfill orders themselves or pay for Walmart Fulfillment Services, the retailer's own warehousing and delivery operation. A broader carrier list lowers the switching cost of staying seller-fulfilled.

Which carriers made the list?

DoorDash and UniUni are the named additions among the eight. DoorDash brings a dense same-day courier network originally built for restaurant delivery. UniUni is a gig-based last-mile carrier focused on Canadian and U.S. e-commerce parcels.

What Walmart has not disclosed:

• The names of the other six approved carriers
• Any volume figures tied to seller-fulfilled shipments
• Whether approval thresholds vary by carrier size or geography

That gap matters. Carrier counts are easy to announce; parcel volumes and delivery-cost savings are what distributors and sellers actually price into their channel decisions, and Walmart has not put numbers on either.

Why does this matter for sellers?

The economics of seller-fulfilled shipping come down to two levers: what a seller pays per parcel and how fast the parcel lands. Adding couriers like DoorDash gives sellers in dense metro markets a same-day option that national carriers price at a premium.

Sellers gain flexibility, but they also keep the obligations — on-time performance metrics, customer service and claims handling stay with the merchant. Walmart's marketplace standards still apply regardless of which approved carrier moves the box.

For carriers, approval is an on-ramp. A marketplace-approved badge puts smaller last-mile operators in front of thousands of sellers who previously could only contract with the largest parcel networks.

How does this fit Walmart's marketplace strategy?

Walmart has spent years expanding its third-party marketplace to widen assortment without buying inventory — a gross-margin lever that shifts carrying cost and inventory risk onto sellers. Carrier flexibility is the operational counterpart: it makes the seller-fulfilled path more viable, which in turn widens the pool of merchants willing to list.

The measured fact here is the approval itself — eight carriers, including DoorDash and UniUni. Everything about improved delivery speed or cost for sellers remains, for now, an assertion without disclosed volumes to test against it.

Walmart has not said whether more carrier approvals are queued or when the next batch might land, so sellers should expect the current eight-plus list to be the working benchmark until the retailer discloses otherwise.

By Olivia Hart