Highstock raises $30M Series A

Andreessen Horowitz led the round, with Greylock, Abstract Ventures, Daybreak Fund and angels also in. a16z AI partner Olivia Moore joins the board, and Jeff Jordan comes on as an advisor. Valuation was not disclosed. Total disclosed funding is about $35.5 million, including a $5.5 million seed from Greylock in February 2025. The team is roughly 15 people in New York. In a little over a year, the marketplace has listed more than $1 billion of inventory from over 100 brands. About 60% of transaction volume comes from brands with more than $500 million in annual revenue, and international buyers, live sellers and retailers make up 40% of the business. The software matches inventory to vetted wholesale buyers and handles bids, logistics, payments and compliance. CEO Camille van Horne and CTO Sean Cashin both come from Instacart. For AI founders, this is a vertical marketplace where the model does the matching and the operational work around it is the product. One open question is conversion: listed inventory is not the same as sold inventory, and Highstock has not published sales or take-rate figures. The apparel expansion is the next test of whether the approach carries over to a larger category.