Loopring is a zkRollup Layer 2 platform designed for high-throughput, low-cost trading and payment on the Ethereum blockchain. It is an open-sourced, audited, and non-custodial exchange and payment protocol that ensures users have full control over their assets with Ethereum-level security guarantees. Loopring enables highly scalable decentralized exchanges and payment solutions by batch-processing requests off-chain, reducing gas consumption and overall transaction costs significantly compared to on-chain transactions. It is suitable for developers and users interested in utilizing Layer 2 solutions for faster and cheaper Ethereum transactions.