[2][3] In 2015, OfferUp was named one of the Hottest Startups by Forbes, citing the company's explosive growth between funding rounds throughout the year, and was speculated to take over Craigslist's share of the C2C marketplace.

[4][5] Since then, the company has become a large marketplace for buyers and sellers and was named one of "The 7 Most Innovative Startups in Seattle" by Inc.[6][7] OfferUp was in the Top 50 most downloaded free apps on Apple Appstore and Google Play and has been praised for being more user-friendly to list products on than sites like eBay.

[33][34] On the seller side, products are listed immediately by uploading a photo from a user's smartphone or computer; the platform makes it easy to sort inbound inquiries by the highest bid before contacting prospective buyers to agree upon a price and meeting place.

[39] Profile features for customization include verification badges, positive review attributes, average response time, trusted connections, and personalized background images.

[49] A woman in Columbus, Ohio, was robbed at gunpoint in 2018 when she attempted to sell a camera and lens to a buyer who saw her listing on LetGo, which at the time was independent from OfferUp.

[48] Also in 2019, a robber in Cleveland listed an iPhone XS Max for sale on OfferUp; he then stole passports, cash, a wallet, a watch, and other items from two victims who intended to buy it.

[52] In February 2021, a local news station in Charlotte, North Carolina found a listing on OfferUp for power tools that had been stolen from a Home Depot store.

[53] In response to concerns about crime affecting OfferUp buyers and sellers, the company developed guidelines and worked with local police departments to create Meetup Spots, safe places to complete transactions.

[60] OfferUp also implemented TruYou, a two-step verification program that requires registrants to provide a government-issued ID, such as a driver’s license, along with a valid cell phone number, and a selfie photo while inside the app.