Although many in the West may not have heard of DiDi, Apple was impressed enough with it to invest $1 billion in the company in 2016, the same year DiDi acquired Uber China. DiDi now also operates in Japan, Australia, Russia, Africa and Latin America, and Reuters reports it is eyeing a valuation of at least $100 billion for its initial public offering (IPO), about the same as Uber's current market cap.