The Maze: U.S. ecommerce has restarted the channel shift that appeared to stall in 2025. Online sales reached a seasonally adjusted $340.2 billion in the second quarter, up 12.2% year over year, while total retail grew 6.7%. That pushed ecommerce to a record 17.1% of retail spending. The headline is encouraging, but it is not a rising tide with equal-sized boats. Amazon, Walmart, and Shopify are growing faster than the market around them. Online is taking share from stores again. The biggest platforms are taking share from online at the same time.
The recovery is real, but part of it wears a price tag. The Census Bureau's estimate shows ecommerce growing almost twice as fast as total retail in Q2. Online share rose from 16.9% in Q1 to 17.1%, while quarterly ecommerce sales increased 3.8% after seasonal adjustment. Yet Census explicitly does not adjust these figures for price changes. Higher prices can lift sales without creating another order. The clean read is not that consumer demand suddenly jumped 12.2% in real terms. It is that ecommerce has recovered enough nominal momentum to outgrow stores and resume gaining share after last year's pause.
The denominator makes 17.1% look smaller than the market sellers actually face. Total retail includes cars, gasoline, and restaurants—large categories with little online penetration. A merchant selling electronics, beauty, apparel, or household goods competes in a more digital market than the economy-wide share suggests. That distinction matters because channel share measures where dollars move, not how those dollars are distributed among sellers. The category may expand while a merchant still loses visibility, conversion, or margin. Market growth opens the door. It does not assign the shelf.
The largest platforms are compounding the shift. Walmart U.S. ecommerce grew 24%, compared with 3.5% for its overall U.S. business. Store-fulfilled delivery, marketplace activity, and advertising drove the digital result; Walmart U.S. advertising rose 38%. Amazon's online-store revenue rose 15% to $70.4 billion, while third-party seller services grew 16% and advertising 26%. Shopify said growth exceeded 30% across gross merchandise volume, revenue, gross profit, and free cash flow. Different metrics prevent a neat league table, but the direction is consistent: the leading commerce systems are outgrowing the channel.
Winning online demand now means paying—or building—more layers. Walmart can use stores as fulfillment nodes, add marketplace selection, then monetize shopper attention through retail media. Amazon converts demand into first-party sales, third-party commissions, fulfillment fees, subscriptions, and ads. Shopify gives independent merchants infrastructure across storefronts, checkout, and emerging channels. That is why platform growth can outrun market growth. The winners do not capture one transaction once. They collect economics across discovery, conversion, delivery, and merchant operations. Sellers get a larger digital market, but often through a more concentrated set of toll roads.
Why it matters: Ecommerce's return to share gains resets the planning baseline for retailers, brands, marketplaces, logistics operators, and retail-media teams. Store-heavy businesses cannot treat 2025's slowdown as a permanent ceiling. Digital operators should not mistake channel growth for easy growth either. The next dollar is increasingly routed through platforms that control traffic, fulfillment, data, and advertising. The useful question is no longer whether ecommerce is growing. It is whether an operator can capture that growth after platform fees, paid visibility, delivery costs, and price-driven demand are separated from genuine volume.
Sources: Marketplace Pulse | U.S. Census Bureau | Walmart | Amazon | Shopify
