OfferUp.com is a website and mobile app that allows individuals to buy and sell items locally. It was founded in 2011 and is based in Bellevue, Washington. Users can create listings for items they want to sell and browse through listings in their area. Buyers and sellers can communicate directly through the platform to make deals and arrange local pick-up or delivery. OfferUp also has safeguards in place to protect users from scams and fraud. It has become a popular alternative to Craigslist and other online marketplaces for its user-friendly interface and local focus.