Binance is a cryptocurrency exchange which is the largest exchange in the world in terms of daily trading volume of cryptocurrencies. It was founded in 2017 and is registered in the Cayman Islands. Binance was founded by Changpeng Zhao, a developer who had previously created high frequency trading software. Binance was initially based in China, but later moved its headquarters out of China following the Chinese government's increasing regulation of cryptocurrency.
OKX Exchange, formerly known as OKEx, is a Seychelles-based cryptocurrency exchange and derivatives exchange that provides a platform for trading various instruments such as spot and derivative. Some of the exchange's core features include spot and derivative trading. It was founded by Star Xu in 2017. OKX is owned by Ok Group which also owns crypto exchange Okcoin. It is not available to US based investors. The company's CEO is Jay Hao and CMO is Haider Rafique.
Huobi is a Seychelles-based cryptocurrency exchange. Founded in China, the company now has offices in Hong Kong, South Korea, Japan and the United States. In August 2018 it became a publicly listed Hong Kong company.