What are zkSync Hyperchains & how they bring hyper scalability to L3 dApps?

You can say Hyperchains are a Zk version of OP Stacks’ Superchains. There’s a difference in rollup implementation as Superchains are based on Optimistic rollup technology, whereas hyperchains use zk-rollups. 

The development stack for hyperchains is ZkStack. This is a highly optimized, open-source, and modular framework for building custom zk-chains layer-2 and layer-3. zkSync has designed its zkStack with significant improvements to address the challenges of its previous stack– ZK Credo. 

zkStack offers unique benefits such as easy implementation of Account Abstraction in any zk-enabled architecture, 1000X cheaper transactions compared to general rollup chains, and optional extension with zkPorter accounts for highly affordable use cases.

All the hyperchains use 100% identical circuits, ensuring each of them can trust the activities happening on other chains with no need for assumptions. Anyone with extensive experience in zkStack can build modular, app-specific–yet highly secure zk-rollup chains and deploy them permissonlessly on the zkSync Era ecosystem.