Amazon FBA is the default choice for most Canadian sellers, but Walmart's WFS (Walmart Fulfillment Services) has quietly become a serious second channel — especially for sellers already moving volume on Walmart.ca. Here is an honest comparison to help you decide where each program fits.
Audience and traffic
Amazon remains the larger marketplace by a wide margin, with deeper category coverage and more established buyer habits. Walmart's audience skews toward value-conscious everyday shoppers, and competition per listing is generally lighter — which means a well-optimized Walmart listing can rank and convert faster than its Amazon equivalent. Neither is "better" in the abstract; they reach overlapping but distinct customers.
Fee structures
Both programs charge for storage and per-order fulfillment, but the schedules differ in the details: dimensional weight calculations, peak-season storage adjustments and category-specific quirks all affect the final number. As a rule of thumb, run your actual product dimensions and expected monthly volume through both fee schedules before deciding — the cheaper program for a small flat item is not necessarily the cheaper one for a large bulky one. Sellers are often surprised in both directions.
Prep and inbound requirements
This is where sellers stumble. FBA and WFS each have their own labelling, packaging and carton requirements, and they are not interchangeable — a shipment prepped for Amazon will not sail through Walmart receiving untouched. WFS has its own item and carton label specifications and appointment-based inbound, while FBA runs on FNSKU labels and its shipment workflow. If you sell on both, your prep process needs two checklists, not one.
Approvals and categories
Amazon's gating is category- and brand-driven; Walmart's marketplace has its own approval process with an emphasis on seller vetting. Timelines vary, so start applications early and do not plan a launch around an approval date you do not control yet.
Why many sellers use both
Diversification is the real argument. A second channel smooths out Amazon's policy swings, fee changes and account risks, and incremental Walmart revenue often comes at better margins because the competition is thinner. Operationally it is very manageable: the same warehouse can prep for both programs, hold shared inventory, and route units to whichever channel is selling.
Making the call
If you are starting out, master one channel first — usually Amazon, given its volume. Once listings are stable and cash flow is predictable, add Walmart as a second engine rather than a replacement. The sellers who do best on two marketplaces treat them as one inventory pool with two storefronts, not two separate businesses.
How to actually run the fee comparison
Do not compare the programs on headlines; compare them on your products. Pull three of your SKUs — a small light one, a typical one and your bulkiest — and run each through both fee schedules with your real monthly volume. Watch for the details that swing the result: dimensional weight rules that punish bulky items, storage fees that compound on slow movers, and any category-level adjustments. Sellers routinely find that one program wins clearly for half their catalogue and loses for the other half, which is itself useful intelligence for where to list what.
One inventory pool, two storefronts
The operational mistake is treating two marketplaces as two businesses. The winning setup is a single inventory pool in one Canadian warehouse, prepped to each program's requirements and routed to whichever channel is selling. That means two prep checklists and two label specs, but one stock count, one reorder point and no stranded inventory. If your 3PL can prep for both FBA and WFS from the same shelves, adding the second channel is mostly upside.
SellerOrbit preps for both programs from our Oakville, Ontario warehouse — Walmart WFS prep from $0.70 per unit and Amazon FBA prep from $0.35 per unit, with shared inventory across both channels. Chat with us for a written quote.
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