Based on automated credit lines to about two million vendors trading on Alibaba’s online retail platform, and a discontinuity in the credit decision algorithm, we document that a vendor’s access to FinTech credit boosts its sales growth, transaction growth, and the level of customer satisfaction gauged by product, service, and consignment ratings. These effects are more pronounced for vendors characterized by greater information asymmetry about their credit risk and with less collateral, which reveals the information advantage of FinTech credit over traditional credit technology.