Layer 2 Scaling Solutions Compared

A technical comparison of Arbitrum, Optimism, Base, and zkSync — which L2 is right for your project?

Why Layer 2?

Layer 2 solutions process transactions off the Ethereum mainnet while inheriting its security. This dramatically reduces gas costs and increases throughput.

Optimistic Rollups

Arbitrum: Largest L2 by TVL. Nitro upgrade provides near-instant finality. Strongest DeFi ecosystem.

Optimism: Powers the OP Stack — a modular framework for building custom L2s. Base (by Coinbase) is built on it.

ZK Rollups

zkSync Era: Uses zero-knowledge proofs for validity. Native account abstraction support.

StarkNet: Cairo-based ZK rollup with unique programming model and high throughput potential.

Choosing an L2

Consider ecosystem maturity, developer tooling, bridge security, and specific feature requirements for your use case.