1inch is a decentralized exchange (DEX) aggregator and automated market maker (AMM) running on the Ethereum blockchain. It was founded in 2019 by Anton Bukov, Sergey Kunz and Mikhail Melnik.

The platform allows users to find the most efficient ways to trade on various DEXs, finding the best prices for their trades. Essentially, it pools liquidity from different DEXs to ensure optimal trade execution for users.

1inch uses the Pathfinder algorithm to split orders across different liquidity pools, which ultimately reduces slippage and maximizes the user's profit.