Linera is a blockchain infrastructure that aims to support the most demanding Web3 applications by providing them with predictable performance, security, and responsiveness at the Internet scale. To do so, Linera solves the blockspace scarcity problem by introducing a new, integrated, multi-chain paradigm built upon elastic validators. Linera puts users at the center of the protocol by allowing them to manage the production of blocks in their own chains—called microchains—for optimal performance.