OfferUp on Monday merged the Letgo marketplace onto its app following the company’s acquisition earlier this year.

With the addition of rival Letgo, OfferUp now has a U.S. customer base of more than 20 million monthly active users who use its app to buy and sell used goods.

Letgo users can use their log-in credentials on the new OfferUp app and their ratings, sales, and purchase history will transfer to a new OfferUp account.

OfferUp, founded in 2011 and ranked No. 8 on the GeekWire 200, also raised $120 million when it announced the Letgo deal in March. Total funding to date for OfferUp to $380 million.

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