Arbitrum

Arbitrum is an Ethereum scaling solution built as an optimistic rollup. It batches transactions off-chain and posts compressed data to Ethereum, inheriting the base layer's security while reducing fees and throughput constraints.

The project describes itself as one of the leading Ethereum scaling solutions, bringing cheap transactions to tens of thousands of users in an environment that feels very similar to Ethereum. It ranks as the leading L2 in terms of TVL.

The ecosystem hosts several large decentralised applications, including GMX, Radiant, Uniswap V3, and Gains Network, spanning perpetuals, lending, and spot exchange use cases.

As an optimistic rollup, Arbitrum assumes transactions are valid by default and posts them to Ethereum without computing each one on-chain. A challenge window allows anyone to submit a fraud proof if they detect an invalid state transition, triggering a dispute resolution process on L1.

This architecture lets Arbitrum inherit Ethereum's settlement and data-availability guarantees while executing smart contracts more cheaply off-chain. The result is a user experience that mirrors Ethereum's EVM environment but at a fraction of the gas cost.

Because withdrawals require the challenge period to elapse before funds can move from L2 to Ethereum mainnet, there is an inherent delay in moving assets across layers.

ARB has a fixed max supply of 10,000,000,000 tokens and a total supply of 10,000,000,000, meaning no additional tokens will ever be created beyond the cap.

Circulating supply stands at 6,785,574,605 ARB, leaving 3,214,425,395 tokens outside current circulation. The token is categorised under Governance, indicating its primary on-chain function is protocol decision-making rather than gas payment or staking.

The fixed supply provides a known upper bound on dilution, but the large non-circulating portion means future distribution dynamics remain a factor for holders to monitor.

Arbitrum's primary competitive edge is its position as the leading L2 in terms of TVL, which creates a liquidity moat. Major protocols building on the chain benefit from deep liquidity, which in turn attracts more users and applications.

The EVM-compatible execution environment reduces friction for developers porting Ethereum dApps, while the optimistic rollup design has been battle-tested with live applications processing real volume.

The combination of leading TVL, established dApps like GMX and Uniswap V3, and an Ethereum-like developer experience positions Arbitrum as the incumbent optimistic rollup against newer zero-knowledge competitors.