Offchain Labs

Off-chain smart contracts with on-chain security.

We make smart contracts easier and cheaper to develop and run at massive scale, with production level security. Our developer tools do the heavy lifting to add a flexible second layer to your decentralized application architecture, so that you can focus on business logic and user experience. Beginning with the Ethereum blockchain, we're coming soon to a blockchain near you.

Subscribe to get the latest updates about Arbitrum!

Arbitrum's three powerful scaling modes

Channels

Perfect for contracts that have a fixed set of participants, Arbitrum channels move all contract computation and storage offchain. You can think of these as powerful state channels with a highly efficient dispute resolution mechanism that guarantee privacy and remains off-chain even in the presence of disputes.

Sidechains

Interested in deploying your own sidechain with a named set of validators? Arbitrum sidechains are the only sidechain technology with the AnyTrust guarantee that ensures correct execution even if only a single validator behaves honestly.

Rollup

Ideal for contracts that don't have a fixed set of participants or validators, Arbitrum Rollup contracts enjoy the fully trustless security of the Ethereum blockchain, all while simultaneously increasing the contract's capacity and greatly reducing gas costs.

Why Use Arbitrum?

Scalable

Whether you're using channels, sidechains, or Rollup, Arbitrum reduces costs while increasing contract capacity and speed without compromising on security or interoperability.

Private

Nobody other than the participants of an Arbitrum channel can see its code or its internal state. Only the public actions of a contract, such as payments it makes, are visible to the world.

Straightforward

No new coding paradigms or programming langauges to learn here. The Arbitrum toolchain automatically converts Ethereum contracts to Arbitrum contracts.

Dive Deeper

Want to learn all about how Arbitrum can enable you to build new applications? Read our whitepaper.

Read the white paper

Want to learn even more details about how Arbitrum works? Read the academic paper, published at USENIX Security.

Read the Academic paper

Ready to dig into the code and start using Arbitrum today with our developer preview? Check out our developer website

Read the code

Leadership

Ed Felten

Ed Felten is the Robert E. Kahn Professor of Computer Science at Princeton University. He formerly served in the White House as Deputy United States Chief Technology Officer. He is a member of the National Academy of Engineering, and co-author of the leading textbook on cryptocurrencies.

Steven Goldfeder

Steven Goldfeder is a postdoctoral researcher at Cornell Tech where he works at the intersection of crypto(graphy) and crypto(currencies). He holds a PhD from Princeton University and is a co-author of Bitcoin and Cryptocurrency Technologies, the leading textbook on cryptocurrencies.

Harry Kalodner

Harry Kalodner is a PhD candidate at Princeton University working under professor Arvind Narayanan. His research explores economics, anonymity, and incentive compatibility of cryptocurrencies. He developed BlockSci, a tool for cryptocurrency analysis as well as a Bitcoin mining strategy simulator.

Upcoming Events

Members of our team will be at these upcoming events. Feel free to email us at [email protected] if you'd like to connect at any of these venues.

Event Schedule

ETHDenver | February 14-16 2020
Stanford Blockchain Conference | February 19-21 2020
ETHNewYork | May 2020

Arbitrum scales your Ethereum contracts today.