What does the marketplaces landscape look like in the US?

The industry structure varies by segment, reflecting differences in buyer behavior, transaction complexity and workflow depth. B2B marketplaces are split across broad procurement platforms(e.g. Faire) and vertical-specific marketplaces (e.g. Xometry), as business purchasing varies by category, buyer type and workflow. Automotive marketplaces are fragmented, with platforms split across dealer-facing demand-generation platforms that connect car buyers with dealer inventory, software platforms that support online retail and wholesale platforms that help dealers source and sell used-vehicle inventory. . Real estate marketplaces are concentrated among scaled property-search platforms (e.g. Zillow), while specialist platforms (e.g. Crexi) compete in narrower asset classes or transaction types. Across segments, scaled players differentiate through audience reach, proprietary data and embedded tools that help buyers search, finance or transact while helping sellers generate and manage demand. As such, scale remains important because deeper inventory attracts more buyers, which draws more sellers and advertisers and strengthens the platform’s ability to improve discovery, pricing and conversion. By contrast, specialist marketplaces compete in narrower use cases, where transaction trust, category-specific supplier networks, technical purchasing requirements or asset-class expertise create defensible positions. M&A and funding activity remain focused on expanding beyond marketplace discovery into adjacent transactions, financing, logistics and workflow tools that help platforms capture more value before and after buyer-seller matching.