Bitcoin is a peer-to-peer currency. Peer-to-peer means that no central authority issues new money or tracks transactions. These tasks are managed collectively by the network.
"Bisq is an open-source desktop application that allows you to buy and sell bitcoins in exchange for national currencies, or alternative crypto currencies."
"Blockchain is the world's leading software platform for digital assets. Offering the largest production block chain platform in the world, we are using new technology to build a radically better financial system."