About
Arbitrum One and Nova are optimistic rollups scaling Ethereum, built by Offchain Labs (founded 2018 by Princeton researchers Ed Felten, Steven Goldfeder and Harry Kalodner). Offers the Arbitrum Orbit stack for custom chains and Stylus for Rust/C++ contracts; governed by the Arbitrum DAO with the ARB token. Offchain Labs raised a $120M Series B led by Lightspeed in 2021.
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