Launched on February 21, 2021, Raydium is a Solana-based automated market maker exchange and liquidity provider that powers the Solana DeFi ecosystem. Raydium shares liquidity with Serum, another Solana DEX, and has access to its central order book mechanism that mirrors traditional exchanges. This allows for super-fast, low-fee trading of digital assets on Solana while providing the reliability of an order book system.