What network is 1inch on?

I'm curious to know, which blockchain network does the decentralized exchange protocol 1inch operate on? I've heard about its liquidity aggregation capabilities and the ability to source tokens from multiple sources, but I'm not sure which blockchain infrastructure it utilizes. Is it Ethereum-based? Or perhaps it's compatible with other leading smart contract platforms? Clarifying this information would help me better understand the scope and reach of 1inch's services within the decentralized finance ecosystem.