Etherscan is the leading BlockExplorer for the Ethereum Blockchain. A BlockExplorer is basically a search engine that allows users to easily lookup, confirm and validate transactions that have taken place on the Ethereum Blockchain. We are independently operated and developed by a team of individuals who are truly passionate and excited about the kinds of decentralized information and infrastructure applications that Ethereum makes possible.
And just like you, we are "users" of the Ethereum Blockchain. Etherscan is not funded, operated or managed by the Ethereum Foundation but instead exists as an independent entity. The Ethereum Blockchain has a public ledger (like a decentralized database) which Etherscan.io indexes and then makes available this information through our site. Our mission is to facilitate Blockchain transparency by indexing and making searchable all transactions on the Ethereum Blockchain in the most transparent and accessible way possible.
Etherscan is not wallet service provider, we do not store your private keys and we have no control over the transactions that take place over the Ethereum network.
In addition, we also provide a set of load balanced robust API Services that can be used to either build decentralized applications or to serve as data feeds for Ethereum Blockchain information.