Spire

Spire is a modular L3 network built on top of zkEVM L2, which extends Ethereum in a fractal manner. Spire provides infrastructure for developers to launch their own interoperable application chains at the L3 level. It is a type of Rollup-as-a-service (RaaS) as well as an L3-as-a-service solution. Unlike other RaaS solutions, Spire focuses on L3 networks running on top of zkEVM. Thanks to its recursive zkrollup architecture, L3 networks built with Spire can scale vertically and also come with special features that allow them to utilize contracts from L2, such as Scroll. Additionally, Spire itself will launch its own L3 network to support other application chains on top of it.