The South Korean e-commerce company known for its Rocket Delivery service is Coupang.
Coupang was founded in 2010 by Bom Kim and grew from a Groupon-style deals website into one of South Korea’s largest online retailers. Its distinguishing advantage became logistics: instead of relying only on third-party carriers, Coupang built a dense network of fulfillment centers, sorting operations, and delivery personnel.
Rocket Delivery is the brand associated with that fast-delivery system. Eligible products can arrive the same day, overnight, or the next day, depending on the order time and location. The service helped reset Korean shoppers’ expectations for convenience and speed, much as Amazon Prime influenced delivery habits in other markets.
Naver Shopping is a major Korean shopping platform, while Gmarket and 11Street are established online marketplaces, but none is the canonical answer to this question. Another related Coupang service is Rocket Fresh, which applies the company’s logistics model to groceries. Coupang later expanded beyond retail into areas such as food delivery, streaming, and operations outside South Korea.