OpenZeppelin is the global standard for smart contract security, having completed 900+ audits since 2017 across Solidity, Rust, Go, Cairo, and other languages. Founded in 2015 in San Francisco, OpenZeppelin’s open-source contract libraries are used in virtually every major DeFi protocol.
The company offers smart contract audits, security consulting, the Defender security operations platform, and ongoing security research. OpenZeppelin has audited contracts for MakerDAO, Compound, Uniswap, Aave, and hundreds of other protocols.
OpenZeppelin is not a full-stack development shop — it is the definitive security partner for DeFi protocols requiring the highest assurance audits and battle-tested contract libraries.