OpenZeppelin

OpenZeppelin is the security standard for onchain finance, providing battle-tested open-source smart contract libraries, institutional-grade security audits, and developer tooling for Ethereum and other major blockchain networks. Founded in 2015, its OpenZeppelin Contracts library is used in over 64% of active blockchain wallets and protects more than $250 billion in total value locked across DeFi protocols and tokenized funds. The company serves leading financial institutions, DeFi protocols, and blockchain platforms with AI-powered security audits, monitoring infrastructure, and upgrade management tools.