Ethereum Layer 2 in 2026: Arbitrum vs Optimism vs Base Compared

Ethereum layer 2 networks like Arbitrum, Optimism, and Base make DeFi affordable. This 2026 comparison covers fees, ecosystem size, security, and which L2 is best for different use cases.

Ethereum Layer 2s process transactions off the main chain and post batched proofs back to Ethereum. The result: Ethereum security at a fraction of the gas cost. In 2026, most DeFi activity has migrated to L2s.

Arbitrum: The DeFi Powerhouse

Arbitrum One hosts the largest DeFi TVL of any L2 — over $15B. GMX (perps), Uniswap V3, and Aave are dominant here. Average transaction cost: $0.05–0.30.

Base: The Consumer L2

Coinbase's Base is the fastest-growing L2 by new user count. Sub-$0.01 transactions after EIP-4844 make it ideal for consumer apps and NFTs.

Cross-L2 Bridging with Steyble

Steyble Bridge aggregates the fastest, cheapest routes between all major L2s — no need to use each network's slow native bridge.