Quorum, originally created by JP Morgan and now overseen by Consensys, is an open source blockchain protocol, derived from fork of Ethereum by modifying the Geth client. It is specially designed for use in private blockchain networks.

Quorum protocol can be used when there is only a single member owning all the nodes, or, a consortium blockchain network, where multiple members each own a portion of the network. It is transforming use cases pertaining to Trade Finance, Supply Chain Finance, Commercial Bank Payments, Institution Trading, Debt Issuance, Loan Marketplaces, Insurance, Healthcare and Digital Identity.