Not just a thrift store, and not just a thrift store online, ThredUp claims to be the world’s largest online shopping destination for second hand swag. Clever curation also sets it apart.
With the seasonal fashion industry generating massive waste through unsold inventory and fabric offcuts ending up in landfills, ThredUp clearly has the upper hand. 
“We’re the world’s largest online secondhand shopping destination with thousands of like-new styles from your favorite brands at up to 90% off estimated retail,” explains the website's description.
Adding: “We make sure every single one of the 40K new arrivals we add to the site every day is 100% authentic and in such good shape anyone could mistake them as new. No knock offs here—just knockoff prices. Find high-quality used women’s clothing and used children’s clothing from fashionable closets just like yours. Specially curated by our style experts.”
