ThredUp Inc. operates an online consignment and thrift platform that enables consumers to buy and sell secondhand women's and children's apparel, shoes, and accessories. As one of the largest resale platforms, it provides a managed marketplace where sellers use Clean Out Kits for easy submission, while buyers access curated selections at discounted prices with authentication, quality control, and logistics handled in-house. ThredUp Inc. extends clothing lifecycles, promotes sustainable fashion, and simplifies the resale process through end-to-end services including pricing, merchandising, fulfillment, and customer support. Beyond its consumer-to-consumer model, it offers Resale-as-a-Service (RaaS) to retailers and brands, integrating pre-owned inventory into their e-commerce channels without requiring partners to build their own infrastructure. The company also operates wholesale channels, selling bulk sorted inventory to third-party buyers. Founded in 2009 and headquartered in Oakland, California, ThredUp Inc. plays a key role in the growing circular economy within the fashion industry, primarily serving the U.S. market.