Arbitrum History: From Princeton to the Largest L2
2018–2021: From Princeton Research to Offchain Labs
Arbitrum's technology grew out of academic research by Ed Felten — a former Princeton University computer science professor who also served as the U.S. Deputy Chief Technology Officer under the Obama administration. Together with Steven Goldfeder and Harry Kalodner, he founded Offchain Labs to turn the research into a working product. The Arbitrum One mainnet launched in August 2021.
How Arbitrum Works
Arbitrum is an Layer 2 solution known as an "optimistic rollup": transactions are processed separately from the main Ethereum network, and the resulting data is then posted back to Ethereum — letting it benefit from Ethereum's security while charging much lower fees.
March 2023: One of DeFi's Largest Token Airdrops
On March 23, 2023, Arbitrum launched its own ARB token and airdropped roughly 1.16 billion tokens to about 625,000 wallets that had previously used the network actively. Due to thin initial liquidity, the token showed extreme volatility in its first hours of trading before settling into more stable levels.
Today: A Leader Among Layer 2 Solutions
Arbitrum remains the largest Ethereum L2 by total value locked, hosting hundreds of decentralized applications.