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The Espresso Sequencer recently passed its second major milestone and testnet. And today, we are excited to share that Doppio is now open to the public. The ecosystem’s first public testnet for a shared sequencing layer is here: medium.com/@espressosys/o…

Bootstrapping a sequencer network is akin bootstrapping a validator set for L1. The two major players in the industry are Espresso ☕️ and Astria. Espresso also have a data availability ("DA") solution called Tiramisu, whereas Astria want to use @CelestiaOrg for DA. (9/12)

In addition to integrating with the OP Stack, we’re also excited to provide an update on our work for the Optimism Collective’s Leader Election proof of concept:

Heading home from Permissionless. Great job all round Blockworks and Bankless. Our biggest news there was a collaboration with Espresso for the development of Timeboost ordering and shared sequencing tech compatible with Arbitrum chains. I’ve known Ben Fisch ☕️ and

The Espresso Sequencer recently released its third major milestone and testnet, Cortado. And today we are unveiling the first live, public demo of a shared sequencer. This demo not only supports multiple rollups, but multiple rollup stacks: medium.com/@espressosys/l…

We think a lot about rollup preconfirmations. We have been working on a design we call Byzantine Fault Tolerant (BFT) preconfirmations. In our latest blog, we explore this approach alongside Proposer-Promised preconfs, as initially described in the context of based sequencing:

It's exciting to see discussion about shared sequencing, preconfirmations, and Espresso ☕️ in Ethereum's Reddit AMA yesterday! My thoughts in this thread:🧵 reddit.com/r/ethereum/com…

The Espresso Sequencer exists to scale Ethereum rollups. To support this vision, we're excited to unveil our work integrating with the @Arbitrum stack. This integration is a part of our latest testnet release: Gibraltar.

This Saturday we’re going Beyond the Base Layer. Interested in L2s, rollups and the applications we can deploy on top of them? Come learn from speakers from Espresso ☕️, Base, Polygon, Offchain Labs, EigenCloud, Cartesi, and more.

We’re excited to announce that Espresso Systems has raised a $28 million Series B round led by a16z crypto.

Today we announced our Series B fundraise led by a16z crypto Ali Yahya . Our post medium.com/@espressosys/s… reiterates the core message of my article "Based Espresso". Espresso is a marketplace for shared sequencing, designed to increase rollup composability and value capture.

This is going to be massive. One of the biggest drawbacks of shared sequencers is the misalignment of incentives for rollups which *theoretically* lose revenue. In today's Modular March recording, Ellie Davidson ☕️ explained how Espresso ☕️ flips this on its head, coming 🔜

Integration Spotlight #007: Espresso ☕️ A solution accelerating your rollup decentralization.

After two years of R&D, five testnets & integration plans with >20 chains, we’re excited to announce the Espresso Network is now live on mainnet! This launch is a major milestone, both for our team and along the path to making Ethereum composable again. Read on to learn more ☕️

Two years ago, when the explosion of L2s was beginning to really accelerate, I sat down with some other Ethereum L2 founders. Everyone I spoke with shared a strong desire to have a unified Ethereum and they all seemed very genuine about it. But the problem was that if you

1/ Excited, but frankly quite worried, about a new work with the wonderful 🏴 levochka.eth 🏴 💙💛🇮🇱☀️🦁🗡️ and Dmitry Khovratovich: ia.cr/2025/118 We break soundness of a standard protocol (essentially commit to witness and run GKR) by constructing a circuit for which we can prove a false statement.

If you're building interop solutions, we invite you to join us in shaping the future of both Arbitrum and Ethereum. A unified Ethereum would not be possible without the contributions of others, including the Ethereum Foundation, Espresso ☕️, LayerZero, Uniswap Labs 🦄,

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Ohh yeah, we ship. And thrilled for what's coming. Espresso ☕️

"I first came to the U.S. as an exchange student in high school. It wasn’t Silicon Valley or New York—just a tiny town in rural Michigan—but I loved the culture. People were optimistic, outgoing, and driven. That stuck with me. So when grad school gave me the opportunity to