Prosper Marketplace, Inc. is a San Francisco, California-base company that operates Prosper.com, an online auction website where individuals can buy loans and request to borrow money. Borrowers set the maximum interest rate they wish to pay, and loan buyers, called "lenders," bid on specific loans by committing a portion of the principal and setting the minimum interest rate they wish to receive on a particular loan. Prosper manages the reverse dutch auction, assembling bids with the lowest interest rates in order to fund the loan.