Betrium is the solution developed by group of entrepreneurs and MIT & MIPT graduates offering the first partly-decentralized worldwide betting service (betting exchange & Sportsbook) with zero-commisions, accepting crypto-currencies and offering platform for event organizers, developers and third-party betting service providers. In Betrium bets happen off-chain and only added when the event happens and the outcome is undeniable. However the bets are broadcasted all over the network instantly for the odds to be recalculated. That means, in contrast to competitors, they are able to provide high-speed betting service built on decentralized IT architecture.