Augur is an Ethereum-based prediction market protocol that allows anyone to create and operate a market. Augur is a decentralized, Ethereum-based oracle and prediction market protocol, allowing users to state opinions on the likelihood of a future event by buying shares in a given outcome without reliance on a managing bookkeeper. Unlike decentralized competitors such as Gnosis, Augur is not a single platform but a body of open source, Solidity-based smart contract code allowing any user to create and operate a market.