The top GMCI Layer 2 Index projects, ranked by prominence — TVL, market cap, funding, and on-chain activity.

Mantle Network
Modular Ethereum L2 with EigenDA
ethereummantle

Stacks
Bitcoin L2
bitcoinsolana

Boba Network
Layer-2 scaling with Hybrid Compute power
bobaethereum

Metis
ethereum

MATIC (migrated to POL)
polygon

StarkNet
decentralized ZK-Rollup
ethereumsolana

Optimism
The official bridge for Optimism L2
baseethereumoptimism

Arbitrum
Ethereum scaling with optimistic rollups
arbitrumarbitrum-novaethereum