Arbitrum Orbit is a framework for deploying L3 chains that settle to Arbitrum One, with customizable validators, throughput, and fee structures.
Framework live. Robinhood Chain, Mirror World, and others deployed. Combined fees flowing to Arbitrum DAO.
Updated 1 Jul 2026Checked 10 Oct0 updates this week
Orbit chains inherit Arbitrum's security but can customize throughput (faster/slower sequencing), validator sets, and fee mechanisms.
Orbit chains prove their state to Arbitrum One, which settles to Ethereum. This two-layer nesting reduces costs while maintaining Ethereum-level security.
Orbit chains pay 10% of sequencer fees to the Arbitrum DAO, creating a revenue model that funds protocol development.
| Spec | Arbitrum Orbit |
|---|---|
| Settlement | Arbitrum One (L2) or Ethereum (L1)R (reported) |
| Robinhood Chain daily fees (peak) | $3.75MR (reported) |
| Orbit chain fees to Arbitrum DAO | 10%R (reported) |
R reported by the company
Offchain Labs
Arbitrum rollup, Nitro, BoLD fraud proofs, Stylus, Orbit
Offchain Labs builds Arbitrum, the largest optimistic rollup ecosystem on Ethereum. The company develops the Nitro technology stack, which powers Arbitrum One, Arbitrum Nova, and Arbitrum Orbit chains. Its permissionless BoLD fraud proofs enable decentralized validation.
