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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".
CEX.IO Broker is a cryptocurrency margin trading platform based on contracts for difference.
Founded in 2011, Paymium describes itself as the first Bitcoin exchange in Europe. It is registered in France as a SAS company and operates as a Bitcoin trading platform.