Compound is a DeFi (Decentralized Finance) blockchain-based lending protocol that uses an exponential math system to allow users to borrow in cryptocurrencies.

Compound is a money market protocol on the Ethereum blockchain. The algorithmic interest rate protocol enables users to deposit cryptocurrencies to earn interest or borrow other crypto assets. The protocol has achieved immense precision while representing fractional quantities, making it one of the most sought-after DeFi platforms. Hosted on GitHub, the open community itself primarily maintains the Compound protocol codebase.