Aion (AION) is a multi-tier blockchain that was created to offer scalability, privacy, and interoperability. The project aims to be an integrated blockchain network that allows any public/private blockchain to transact and communicate across the network. It supports custom blockchain architectures, and provides cross-chain interoperability through a series of connecting bridges. AION is part of the Blockchain Interoperability Alliance (BIA). The alliance comprises ICON, Aion, and Wanchain, and has the shared goal of promoting interconnectivity between isolated blockchain networks.