Scaling Ethereum
Without Compromise

Tools and products designed for limitless interaction with Ethereum.

In the News

Products and Case Studies: Web3 development made simple.

Offchain Labs has built a suite of products for developers, businesses, and individuals to harness the full potential of Ethereum technology. We continue to research and build accessible solutions for those seeking to integrate and innovate using our transformative technology.

Latest Blogs

ArbOS 20 “Atlas” Now Live

5 min read | March 14, 2024

We’re elated to announce the much-anticipated release of ArbOS 20, affectionately dubbed “Atlas.” This milestone marks a significant leap forward for the Arbitrum ecosystem, introducing Ethereum Dencun support...

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Reflecting on 2023

6 min read | Dec 29, 2023

As 2023 comes to a close, we believe it's a great opportunity to look back at all of the progress we've made this year — from the many technical launches and feature announcements to the partnerships and collaborations...

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Stylus Now Live — One Chain, Many Languages

6 min read | Aug 31, 2023

TL;DR: Today we released the code and public testnet for Arbitrum Stylus, allowing developers to use both traditional EVM tools and WASM-compatible languages like Rust, C, and C++ to build applications on...

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Why I’m Still Optimistic About Optimistic — Ed Felten

5 min read | Sep 25, 2023

Arbitrum uses an optimistic rollup protocol. People often ask why we chose optimistic for Arbitrum, and whether we expect Arbitrum to switch to ZK proving. I have written about this before, but that was almost two years ago...

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EIP 4844: What does it mean for L2 users?

7 min read | Feb 13, 2024

As of this writing, EIP-4844 and the rest of Dencun upgrade are currently scheduled to go live on Ethereum mainnet on March 13. Dencun, the next Ethereum hard fork, is on testnet and will be coming to mainnet soon...

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BOLD, Permissionless Validation for Arbitrum Chains

4 min read | Aug 3, 2023

TL;DR: We are announcing BOLD (Bounded Liquidity Delay): a dispute protocol we invented at Offchain Labs that can enable permissionless validation for Arbitrum chains. The code and specification are now available...

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Prysm + Offchain Labs Anniversary Update

4 min read | Oct 12, 2023

One year ago today, Offchain Labs announced the acquisition of Prysmatic Labs. It's been an incredibly busy year since, with several quarterly updates to the Prysm Client, and the Prysm engineering team spending time...

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Time boost: a new transaction ordering policy for Arbitrum

5 min read | Mar 1, 2023

TL;DR:We’re proposing a modified transaction ordering policy for the Arbitrum sequencer, adding a “time boost” to the current first-come, first-served policy, where a transaction could pay a priority fee ...

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Our Founders

Ed Felten
Co-Founder & Chief Scientist

Ed Felten

Steven Goldfeder
Co-Founder & CEO

Steven Goldfeder

Harry Kalodner
Co-Founder & CTO

Harry Kalodner

Offchain Labs is a venture-backed, Princeton-founded company that has dedicated over 5 years to blockchain research and development. As the original developers of the Arbitrum technology, Offchain has been instrumental in revolutionizing the industry through this leading network scaling solutions. The team continues to build upon this foundation by innovating and enhancing products such as Arbitrum Orbit, Stylus, BOLD, and Arbitrum Nitro. In October 2022, Offchain Labs acquired Prysmatic Labs, makers of Prysm, the leading consensus client for Ethereum, further cementing Offchain Labs' commitment to contributing to Ethereum.

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