Facet is a secure, decentralized, and affordable computation platform.
Facet is not a blockchain. Rather, it is a new way of thinking about and using blockchains, specifically Ethereum. All Facet transactions are Ethereum transactions, and all Facet data is stored on Ethereum.
However by shifting the interpretation of these transactions and data, Facet enables you to use Ethereum in a way that is far cheaper than the "intended mode," without sacrificing security or decentralization.