Arbitrum, the Biggest Layer-2 Blockchain on Ethereum, Says ‘Layer-3’ Networks ‘Mainnet Ready’

Orbit is one of many customizable blockchain stacks that have come to market over the past few months. Arbitrum’s competitor, OP Labs, behind the layer-2 chain OP Mainnet (formerly named Optimism), has its own version of a customizable environment, called the OP Stack, which currently powers crypto exchange Coinbase layer-2 network, Base.