Corda

Corda is an open-source blockchain platform designed specifically for enterprise and financial use cases, differing from public blockchains like Ethereum by sharing transaction data only between the specific parties involved in a deal, not the entire network.

This privacy-by-design model (no global broadcast of every transaction) makes it a common choice for regulated financial institutions building shared ledgers for trade finance, syndicated lending, or securities settlement, where confidentiality between counterparties is a hard requirement, not an afterthought.

Backed by R3, a consortium of major financial institutions; used primarily in enterprise/institutional blockchain projects rather than public/consumer-facing crypto applications.