SAI (DAI) is a collateral-backed cryptocurrency whose value is stable relative to the US Dollar. It was created by the Maker, a smart contract platform on the Ethereum blockchain, to enable anyone to leverage their Ethereum assets and generate SAI tokens on the Maker Platform. Once generated, SAI can be used in the same manner as any other cryptocurrency.

Multi-Collateral DAI has launched, SAI refers to the old single collateralized DAI.