The short version
Amazon FBA is the larger and more established option, with a long list of tools and a large buyer base. Walmart Fulfillment Services, known as WFS, is newer, has a smaller seller community and is often less crowded in some categories. Neither is automatically better. The right first channel depends on where your buyers are and what you can maintain.
What is the same
- You send inventory to the marketplace’s fulfilment centres.
- The marketplace picks, packs and ships orders and handles most customer delivery questions.
- Fulfilled orders can qualify for fast-shipping badges that help conversion.
- You still own the listing quality, pricing, advertising and inventory planning.
What is different
Getting started
Amazon lets most sellers open an account and start listing quickly, although some categories and brands need approval. Walmart Marketplace is more selective about which sellers it accepts, and approval is decided by Walmart. Expect to prepare business details and product information carefully. No agency can promise approval.
Where the buyers are
Amazon has a broad global audience and strong search behaviour. Walmart’s buyers skew toward shoppers who already use Walmart in store and online. For some everyday and household products, that audience is a good fit; for others, Amazon is the natural starting point. Look at where your product category already sells, not just at the overall size of each site.
Competition and advertising
More sellers on a platform usually means more competition for the same search terms and more expensive advertising. Walmart’s advertising tools are less mature than Amazon’s, which can be a disadvantage or an opening, depending on your category.
Rules and performance expectations
Each marketplace has its own performance standards, prohibited product lists and listing requirements. A product that passes on one can be restricted on the other. Check both before you assume you can sell the same catalogue everywhere.
Fulfilment operations
Inbound shipment rules, labelling, prep requirements, storage limits and removal processes differ. For a hands-off owner, the practical question is how many steps need human attention each month and who will do them.
A checklist for deciding where to start
- Where do shoppers for your product already buy? Search both sites for your category and note who is selling.
- Is your product allowed on both? Check restricted categories and required documents.
- Can you meet the performance standards? Look at your supplier lead times and packaging.
- What is your margin after fees, advertising and returns on each platform?
- Who will manage inbound shipments, listings and advertising each week?
- Do you want to add a second channel later? If so, choose a first channel that makes that easy.
Starting on one, adding the other
Many owners begin on the channel where demand is clearest and add the second once the first runs smoothly. Keeping one catalogue, one inventory plan and one set of reports across both makes growth easier to manage than running each separately.
Questions that decide the winner for your products
Size, weight and margin
Fulfilment fees depend on size and weight, so a product that works on one platform can be marginal on the other. Work out your landed cost, the selling price you can realistically hold and the fulfilment and referral fees from each marketplace’s own calculator. If the margin disappears on one side, your choice is made.
Seasonality and cash flow
Both platforms charge for storage and both may limit how much inventory you can send. If your product sells in short peaks, long-term storage can erode profit. Plan how much stock you will send ahead of a peak and how you will clear what is left afterwards.
Returns and customer service
Fulfilment programs handle most customer service for fulfilled orders, but you still pay for returns and unsellable stock. Ask how returns are processed, how long refunds take to come back as sellable stock and what you can do with damaged items.
Brand and listing control
If you own a brand, check how each marketplace protects it, what brand programs are available and how product detail pages are managed. A brand that is well protected on one platform may have less control on the other.
A practical way to test
Rather than guessing, run a small, bounded test. Choose one or two products, send a modest amount of stock, set a review date and decide in advance what result would make you expand and what result would make you stop. Keep the test small enough that a poor outcome is a lesson, not a crisis.
- Pick products with proven demand and healthy margin.
- Send a limited first shipment to the new channel.
- Track sales, fees, returns and advertising cost for the same period on both channels.
- Compare margin per unit, not just sales.
- Review after a fixed period and write down what you learned.
Common mistakes when adding a second channel
- Copying listings word for word without checking each marketplace’s rules and search behaviour.
- Splitting inventory evenly instead of sending stock where it sells.
- Forgetting to sync inventory, which leads to cancelled orders and performance problems.
- Judging the new channel too early, or too late.
- Running two channels without a single place to see results side by side.
How we can help
We run both Amazon FBA/FBM and Walmart WFS operations. If you are choosing between them, a consultation looks at your products, margins and workload and recommends a starting point. We do not guarantee approval or sales on any marketplace.
