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A company second brain for Claude Code and Codex

One brain.
Everyone sees what they should.

Your whole company in one brain — knowledge, processes, clients and agents. Everyone opens it as a plain folder in their AI assistant and sees exactly what they should.I want to try itHow it worksThe brain as seen by
CompanyknowledgeprojectsagentsclientsfinanceoutputstemplatesSees 32 of 32 filesWhat it is

A second brain you can share in parts

Today a company knowledge repo is all or nothing. onlybrain gives everyone just the part they need — and it's still a real folder.

  • A real folder

    Work in Claude Code or Codex as you do today. Instructions, agents, skills and bulk edits all work fully.

  • Everyone sees their part

    Roles decide who sees what and where they can write. Hidden folders are not in their copy at all — not even in the history.

  • Nothing to learn

    Connect with one command, manage access in a simple dashboard. You pay for AI once — in your own subscription.

Who it's for

For teams that already work with AI

  • AI-first companies

    One source of truth for the whole company, used by people and their AI assistants alike.

  • Sales, engineering, finance

    Each department gets its own view of the company brain and its own instructions for its assistant.

  • Contractors and accountants

    Share only what they need. They won't see anything else — not even by accident.

  • Individuals

    A personal brain for work, projects and learning — lend a part of it to someone when you need to.

How it works

Three steps and you're in

  1. One brain, a few roles

    The company brain lives in one place. Define roles — leadership, sales, engineering — and which folders each can see and edit.

  2. Everyone connects

    A colleague gets an invite, copies one command and has the brain as a folder. Just their part of it.

  3. They work with their AI

    Open the folder in Claude Code or Codex, ask, add and edit. Changes flow to everyone else.

This is what connecting looks like
git clone https://git.onlybrain.ai/acme/company.git

Be among the first

We're onboarding the first companies. Leave your e-mail and we'll reach out as soon as there's room.
We'll only use your e-mail to get in touch. No spam.