Moonbeam is an open-source smart contract platform that allows developers to build cross-chain applications that are capable of accessing users, assets, and services across multiple blockchains. As a platform that integrates functionality from Ethereum, Cosmos, Polkadot, and many other blockchain technologies, Moonbeam is able to solve today's fragmented user experience, enabling true interoperability and paving the way for new applications to be developed. In order to support smart contracts that access services across a variety of blockchains, the Moonbeam platform uses integrated cross-chain messaging. The combination of this approach, Moonbeam's developer-friendly EVM platform, extensive tool support, and modern Substrate architecture provide the ideal environment for developing connected applications.