Glossary
zkSync
A family of ZK rollups from Matter Labs: the original zkSync Era chain and the ZK Stack — an open-source framework for spawning ZK-secured L2s and L3s.
zkSync Era is a ZK rollup that uses SNARK proofs to settle transactions on Ethereum. It is EVM-equivalent at the language level (Solidity, Vyper) but not bytecode-identical, so contracts compile to a custom ZK-friendly bytecode rather than the EVM directly.
The ZK Stack — Matter Labs' open-source rollup framework — lets other teams spin up their own ZK-secured chains that interoperate through a shared bridging hub.