Moonbeam is a smart contract platform created in 2019 by Derek Yoo, CEO of PureStake. It offers compatibility with the Ethereum network, greater scalability through a proof-of-stake consensus mechanism, and interoperability with other blockchain networks, enabled by the Polkadot network. Developers can use familiar tools and languages, such as Solidity and Web3.js, to build applications on Moonbeam that can interact with other blockchain networks.