Amazon Business has hit $60 billion, a scale milestone that puts the marketplace operator at the center of a B2B ecommerce sector now entering what MarketScale characterizes as its next infrastructure cycle — a phase defined less by catalog growth than by the underlying technology platforms on which wholesale and industrial purchasing will run.

The $60 billion figure is the hardest number in the MarketScale analysis, and it frames the competitive question for distributors across verticals: at that transaction volume, Amazon Business functions less as a retailer and more as channel infrastructure for business buyers. For distributors in industrial, MRO, office and related supplies, the benchmark matters because marketplace scale tends to compound — volume attracts suppliers, assortment attracts buyers, and both squeeze the gross margins of intermediaries that sit between them.

The second concrete move in the report is Instacart's bet on computer vision. The grocery delivery platform, already a force in consumer quick-commerce, is applying camera-based checkout technology to commerce problems that extend beyond the consumer aisle. Computer vision promises to remove friction at the point of transaction — no scanning, no queues — and if the technology proves reliable in commercial settings, it becomes a candidate for B2B pickup counters, will-call desks and warehouse-adjacent fulfillment points where distributors still incur labor cost per transaction.

The pairing of the two developments is the substance of MarketScale's thesis. A $60 billion B2B marketplace and a computer-vision checkout experiment are not the same kind of story, but they belong to the same cycle: capital flowing into the pipes of commerce rather than the storefront. Infrastructure investments of this type tend to be measured slowly. Volume disclosures like Amazon Business's $60 billion can be interrogated directly; claims about what computer vision will do for transaction economics remain, for now, assertions that disclosed throughput data has yet to test.

For distribution executives, the operational readouts are familiar ones. Platform scale pressures gross margin, because marketplace pricing is transparent and buyers comparison-shop at the SKU level. Infrastructure technology pressures cost-to-serve, because every manual touch in order capture, pickup and fulfillment is a line item a competitor with better plumbing can undercut. Inventory turns reward operators that can fulfill from fewer, faster nodes — an area where platform logistics networks have historically held an advantage over decentralized distributor branch networks.

Channel power is the third variable. When a single marketplace intermediates $60 billion of business purchasing, suppliers face a classic concentration question: the volume is real, but the terms of access — fees, data visibility, pricing control — accrue to the platform. Distributors and suppliers deciding how much of their demand to route through that channel are effectively deciding how much channel power to cede in exchange for reach. That trade has played out before in consumer categories, and the B2B sector is now working through it at scale.

What remains unmeasured in the source material is the pace. MarketScale identifies the infrastructure cycle but does not quantify how quickly computer vision deployments convert into transaction volume for Instacart, nor does it break down the composition of Amazon Business's $60 billion across verticals or geographies. Both are the data points distribution analysts will watch next.

The direction, however, is stated plainly: B2B ecommerce's next phase will be built on infrastructure, and the companies now investing in it — a marketplace at $60 billion in run-rate scale and a delivery platform deploying computer vision — are positioning to own the transaction layer through which wholesale demand flows.