StarkNet is a permissionless decentralized Validity-Rollup (also known as a “ZK-Rollup”).

Bitlayer aims to bring secure scalability to the Bitcoin ecosystem, promoting asset diversity and spurring innovation for a faster, safer, and more flexible user experience.

ZKFair is the first community ZK-L2 based on Polygon CDK and Celestia DA, powered by Lumoz, a ZK-RaaS provider.

RWA L1 blockchain

Solana Optimistic Network

StarkWare is a ethereum layer-2 scaling protocol and one of main zk-rollup solutions. Starkware builds StarkNet( a permissionless decentralized ZK-Rollup) and StarkEx(a standalone permissioned Validity-Rollup）, both layer-2 scaling solutions for Ethereum using zero-knowledge rollup technology.