COSS (Crypto-One-Stop-Solution) is a young cryptocurrency exchange registered in 2017 and based in Singapore. Singapore is one of the largest donors to Asian cryptocurrency exchanges. On the platform, you can perform operations with three dozen cryptocurrencies paired with Bitcoin and Ethereum. Today, there are hundreds of stores and three hundred merchants among platform customers.
BITKER was established in Singapore as a centralized cryptocurrency exchange. Following to their outage announcement in September 2019, the exchange platform had suspended its activity. The reason behind this was a cyber attack.