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Nitro is an open-source platform implementing Arbitrum Nitro, a scalable Layer 2 solution for Ethereum based on optimistic rollups. It provides the software stack and components needed to run L2 networks, including validator infrastructure, data availability/provider tooling, and deployment/maintenance tools. Developed by Offchain Labs, the project is hosted on GitHub with active contributions, issues, and pull requests to improve performance and features.
AI named Nitro in December 2025.