Sei is the fastest layer 1 blockchain uniquely optimized for DeFi. Most layer 1s fall into two extremes - with general purpose chains on one end (Solana, Ethereum, Aptos, Avalanche) and app-specific chains on the other (dYdX, Osmosis). Sei explores the middle of the extremes - not quite general purpose nor app-specific but DeFi-specific which enables the layer 1 to explore a brand new design space. By exploring the new design space in between app-chains and general purpose L1s, Sei has carefully selected for a unique set of tradeoffs that make its layer 1 the optimal environment for DeFi apps. Designed from bottoms-up to scale with the needs of DeFi, Sei unlocks new possibilities with optimizations including: - Built-in orderbook - solves the age-old orderbook scaling issue - Frontrunning protection - MEV is a major drawback of popular chains like Ethereum and Solana - Finality - Sei is the fastest chain to finality at ~600ms