Ithaca x Tempo

In 2021 Paradigm released our first open-source project, Foundry, to empower smart contract developers to build secure and efficient financial code faster. What began as an experiment evolved over the years into multiple widely used open source projects, including Reth, Alloy and Solar. Through that journey, we learned that small global teams of open source engineers could have outsized impact on advancing the technical frontier.

In 2024, we brought the core team behind our open source projects into Ithaca, to accelerate the crypto industry, starting with Porto, a next-generation open source wallet.

Today, that team is joining Tempo with the same commitment to help crypto succeed by building the infrastructure it needs to scale and meet real-world demand. I’ll be leading Tempo’s engineering, while continuing my existing role at Paradigm.

Tempo is built using Reth SDK as a library, not by forking Reth, and may carry its own downstream changes to optimize for its specific workloads. These will live outside the main Reth codebase.

Reth will continue to be developed by a mix of core contributors from Paradigm, Tempo/Ithaca, and more at paradigmxyz/reth, as a neutral and unopinionated SDK for building EVM-core chains, including Tempo, Ethereum L1, OP Stack, other L1s, and L2s. The Reth team will continue to be involved in Ethereum core development and accelerate progress in Ethereum.

We expect that Tempo’s global scale payments environment will stress test Reth, Foundry, Porto and the rest of the stack to be even more robust and feature-rich for the entire ecosystem. Learnings from Tempo will continue to flow back into our open source stack, which will continue to be actively maintained and remain neutral building blocks for developers everywhere.

To our community, thank you for trusting & contributing to our codebases! This is just the start!