OpenZeppelin focuses on the development and security of smart contracts, which are self-executing agreements written in code. Their main offerings include a library of reusable smart contracts, a platform called Defender for automating Ethereum operations, and security audits to identify vulnerabilities in smart contracts. This company stands out from competitors by providing a comprehensive suite of tools and services that cater to a wide range of clients, from individual developers to large enterprises, all aimed at enhancing the security and reliability of decentralized applications on blockchain platforms like Ethereum. OpenZeppelin's goal is to help clients mitigate risks associated with smart contract vulnerabilities and to strengthen the overall security of the blockchain ecosystem.