L2 Developments Overview: Optimism, Arbitrum, zkSync [Part 3]

Arbitrum → Arbitrum Orbit (L3):

Arbitrum offers four core products: Arbitrum One (the first and mainnet rollup of the Arbitrum ecosystem), Arbitrum Nova (an AnyTrust solution, designed for projects with cost-sensitive and high transaction volume expectations), Arbitrum Nitro (a technical software stack that powers Arbitrum L2, making the rollup faster, cheaper, and more EVM-compatible), and Arbitrum Orbit (a development framework that allows for the creation and deployment of L3s on top of the Arbitrum mainnet).

L3 rollups, also known as app-chains, play a crucial role in settling transactions to Arbitrum's chains. They are fundamental to the next phase of Arbitrum's scaling journey and serve as the solution to realizing their vision

zkSync → Hyperchains:

Hyperchains are zkSync’s vision of an L3, conceived as an extensive ecosystem of trustless and customizable linked blockchains​