Exx exchange was founded in 2017 and is based in Hong Kong. In 2021 many users reported of disappearance of their funds on the exchange. We strongly recommend to avoid using this exchange.
BitMart is a cryptocurrency exchange launched in 2017. The exchange is registered in the Cayman Islands. The team working for the exchange has ex-members from Amazon, Alibaba, and other huge companies. However, the team members are not showcased on the BitMart website. The offices of BitMart can be found in New York, Seoul, Hong Kong, and Singapore.