Prosper, America's largest people-to-people lending marketplace, was created to make consumer lending more financially and socially rewarding for everyone.

The way Prosper works is intuitive to people who have used an online auction. Instead of listing and bidding on items, people list and bid on loans using Prosper's online auction platform.

People who register as Prosper lenders set the minimum interest rate they are willing to earn and bid in increments of $50 to $25,000 on loan listings they select. In addition to criteria commonly used by institutional lenders, such as credit scores and histories, Prosper lenders can consider borrowers' personal stories, endorsements from friends, and group affiliations.

Borrowers create loan listings for up to $25,000 and set the maximum rate they are willing to pay a lender. Then the auction begins as Prosper lenders can bid down the interest rate. Once the auction ends, Prosper takes the bids with the lowest rates and combines them into one simple loan to the borrower. Prosper handles all on-going loan administration tasks including loan repayment and collections on behalf of the matched borrower and lenders.