Bisq exchange was launched back in 2014. At that time it was one of the first Decentralized Autonomous Organizations (or simply DAO). According to the founders of this exchange, one of the goals of Bisq network is to "keep the original spirit of Bitcoin alive".
Bitfinex is one of the largest exchanges in terms of daily trading volumes and overall recognition. It was founded in 2012 and it is based in Hong Kong. 72 trading pairs are currently available on the platform. The pairs are linked to the four currencies including USD, EUR, BTC and ETH.
Blockchain.io is a new trading platform created by Paymium's team in 2018. Paymium is a French pioneering and experienced Bitcoin exchange platform created back in 2011.