The End of Amazon-Only Strategies
For most of the 2010s, "ecommerce strategy" was a polite way of saying "Amazon strategy." And it made sense. Amazon controlled nearly 40% of US online retail. If you wanted to sell online, you sold on Amazon, and everything else was gravy.
That concentration is eroding. Not dramatically, but steadily and meaningfully.
Walmart's marketplace surpassed 150,000 sellers in 2025, up from 100,000 in 2023. Walmart's ecommerce revenue grew 22% year-over-year through 2025, outpacing Amazon's 12% growth rate. Target's marketplace, Target Plus, expanded from an invite-only program to a broader seller ecosystem. TikTok Shop generated over $20 billion in global GMV in 2025, with the US market growing fastest.
None of these platforms are "replacing" Amazon. But collectively, they're creating a multi-marketplace reality where brands that only sell on Amazon are leaving significant revenue on the table.
Why Multi-Marketplace Selling Is Harder Than It Looks
The challenge isn't listing products on multiple platforms. Any brand can create a Walmart Seller Center account. The challenge is competing effectively on each platform simultaneously, because each one has fundamentally different rules.
Amazon rewards sales velocity, review volume, and advertising spend. Its A10 algorithm prioritizes products with strong conversion rates and fulfilled via FBA. Pricing must be competitive within Amazon's own ecosystem.
Walmart emphasizes price competitiveness explicitly, often suppressing listings that are priced higher than what's available elsewhere online. Walmart's search algorithm weights product attributes and catalog completeness more heavily than Amazon's. Walmart's Fulfillment Services (WFS) provides a Prime-like advantage.
Target Plus operates on a curated model. Selection is tighter, but conversion rates are significantly higher because Target shoppers have high purchase intent. The audience skews more affluent and female compared to Amazon.
TikTok Shop runs on content and virality. Product discovery happens through short-form video, not search queries. The brands that win on TikTok Shop are the ones creating compelling content, not the ones with the best SEO.
A single product might need four different pricing strategies, four different advertising approaches, four different content strategies, and four different inventory plans. Without unified data across all platforms, this becomes an operational nightmare.
The Data Fragmentation Problem
Here's what actually kills multi-marketplace efficiency: data lives in silos.
Your Amazon data is in Seller Central. Walmart data is in Walmart Seller Center. Target data is in their vendor portal. TikTok Shop data is in TikTok's commerce dashboard. Each platform has different reporting formats, different metrics, and different update frequencies.
Want to know your total sales across all channels for a given SKU? That's a spreadsheet exercise. Want to know how a price change on Amazon affected your Walmart sales? You'll need to manually correlate data from two different systems with different time granularities.
This is exactly the problem that unified commerce data platforms solve. A system like BrandBaazar pulls data from all major marketplaces into a single view, enabling cross-platform competitive analysis, unified inventory planning, and pricing intelligence that accounts for how changes on one platform affect performance on others.
The Walmart Opportunity Window
Pay attention to Walmart's marketplace trajectory. Several dynamics make this a critical window for brands to establish position:
Lower competition density. Amazon has over 6 million active sellers globally. Walmart has around 150,000. For any given product category, you're competing against far fewer sellers on Walmart, which means lower advertising costs and higher organic visibility.
Walmart Connect advertising is maturing. Walmart's advertising platform is still in its growth phase, which means CPCs are lower than Amazon's. Early adopters of Walmart advertising are reporting 2-4x better ROAS compared to equivalent Amazon Sponsored Products campaigns.
Walmart's fulfillment network is expanding. WFS now covers 95% of the continental US with two-day delivery, closing the logistics gap with FBA. Sellers using WFS get preferential search placement, similar to how FBA sellers rank better on Amazon.
Integration with Walmart stores. Unlike Amazon (which has limited physical retail), Walmart has 4,700 US stores. The ability to offer buy online, pick up in store (BOPIS) creates a fulfillment advantage that Amazon simply can't match.
Brands that establish a strong Walmart presence now, while competition is still relatively low, will have an enormous advantage as the marketplace matures.
Building a Cross-Marketplace Playbook
Based on patterns from brands that successfully sell across multiple platforms:
Centralize your product data. Before listing anywhere, create a master product catalog with complete attributes, images, and descriptions. Then adapt this for each platform's specific requirements. The master catalog ensures consistency; the adaptations ensure platform-specific optimization.
Differentiate pricing strategically. Don't just copy your Amazon price to Walmart. Walmart's price matching policies mean your Walmart price affects your Amazon Buy Box eligibility and vice versa. Use real-time pricing intelligence to find the optimal price for each platform that maximizes total profit across all channels.
Allocate inventory by platform velocity. If a product sells 100 units/day on Amazon and 20 units/day on Walmart, your safety stock calculation should reflect this. Running out of stock on one platform while sitting on excess inventory on another is a common and expensive failure mode.
Test and learn on emerging platforms. Allocate 10-15% of your marketplace budget to testing emerging channels like TikTok Shop or Target Plus. The brands that figure out these channels early gain compounding advantages.
Invest in unified analytics. The ability to see all your marketplace data in one place, with cross-platform competitive intelligence, isn't optional for serious multi-marketplace sellers. It's the foundation that every other decision rests on.
The era of single-platform selling is over. The brands that build the data infrastructure and operational muscle for multi-marketplace excellence will capture disproportionate share of ecommerce growth over the next five years.