Mercari

Mercari operates a consumer-to-consumer marketplace app where individuals list, sell, and buy secondhand items. A payment deposit system holds funds until both sides complete a transaction, and AI monitoring screens listings and activity for fraud.

Mercari pairs the marketplace with Merpay, a mobile payment service that lets sellers spend their proceeds at outside merchants, which keeps value circulating inside its own ecosystem rather than leaving with each sale. That loop of resale and payments sets it apart from classifieds platforms that leave settlement outside the app.