Our work

We built a private Ethereum assistant.

Private LLM lets you use Ethereum by typing plain English, with the AI model running on your own computer instead of a cloud service. We built it for the Ethereum Foundation, which demoed it on the main stage at EthCC Cannes 2026.

Client
Ethereum Foundation
Runs on
Your own computer
Date
April 2026

Overview

What is Private LLM?

Private LLM is a chat app for Ethereum and other EVM chains. You say what you want in plain English, the model picks the right on-chain action, and the app handles the technical steps behind it.

It can check balances, send funds, prepare transactions for a Safe multisig, and move funds privately with Railgun. We built it for the Ethereum Foundation as a reference for what private, self-hosted AI tooling for Ethereum can look like.

The problem

Why it runs locally

Most AI crypto tools send prompts and wallet context through cloud APIs, so a third party sees your addresses, balances and transaction patterns.

Private LLM removes the AI provider. In local mode the model runs on your own computer through Ollama, so your prompts stay there. Private keys sit in your operating system's keychain, never in browser storage. The app still has to reach the network to read chains and send transactions.

What happened

Demoed on the main stage at EthCC

The Ethereum Foundation ended its Kohaku talk at EthCC Cannes 2026 with a demo of the app. Kohaku is a set of wallet privacy tools, and Private LLM uses its SDK for Railgun.

On stage, a chat request shielded funds through Railgun in a mainnet transaction on Arbitrum. Another drafted a Safe transaction without opening a web front end, which reduces attack surface.

The Foundation presented it as a proof of concept, and the large model in the demo needed a gaming computer.

Contact our team

We take 4 protocols per quarter. Formal verification demands deep focus. We'd rather verify fewer contracts well than many poorly.

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Learn more

Source on GitHub and the EthCC demo on YouTube.

Our work, with more projects and case studies.