Geun-ho Im Mar 17, 2021 (Gmt+09:00) ENG E-book platform operator RIDI Corp. has successfully tapped into the US market, fueling anticipation over the possibility of it becoming South Korea's next unicorn startup. Last November RIDI rolled out Manta, a subscription-based webtoon service, in North America. The service offers Korean webtoons translated into English, priced at $3.99 a month. According to mobile data provider AppAnnie on Mar. 16, Manta is currently in eighth place in the book category on the iPhone App Store in the US. “Manta has seen over 300,000 downloads in just three months from its release,” said a RIDI official. As Manta gains traction in the US, there’s increased anticipation of a hike in the company's price tag as well. In 2019, RIDI secured 33 billion won in Series E funding with a valuation near 550 billion won ($487 million). Its valuation remained the same when it raised 20 billion won from the Korea Development Bank in March of last year.