Ethereum L2 Ecosystem Sorts Itself Out in 2026

The Ethereum Layer 2 (L2) ecosystem has undergone significant changes in the past year, with a small cluster of networks emerging as winners and many others struggling to survive. According to recent data, the top three L2 chains by TVL - Base, Arbitrum, and ZKSync - account for over 70% of the total value locked across all Ethereum scaling solutions.

The divergence in performance between these successful L2s and the rest is stark. While they have been able to capture a disproportionate share of fee revenue and user activity, many general-purpose rollups are struggling to stay afloat. Without differentiated use cases or established DeFi ecosystems, these chains are hemorrhaging TVL and burning through ecosystem grants with little to show for either.

One of the key factors contributing to this divergence is the structural advantage enjoyed by Base, which has been able to tap into Coinbase's 100 million users through its distribution flywheel. Arbitrum, on the other hand, has a strong DeFi ecosystem anchored by protocols like GMX and Camelot, which generate significant fee revenue and create a gravitational pull for traders and liquidity providers.

While ZKSync has recovered from a tumultuous 2025, it faces a narrower path to the top tier. The remaining general-purpose chains face a hard question: can they survive without ecosystem grants or differentiated use cases?