OpenBrainA place to think.
Write daily notes and project context directly. Rich text, selection formatting and autosave keep the writing flowing.
✳ THE MISSING BRAIN FOR YOUR AI.Your AI is brilliant.
Your AI is brilliant.
Give it a brain
that remembers.
Your ideas, notes, projects and sources—connected in one second brain. For you to think with. For your AI to build on.
Working product. Private access. A lot more to come.
a little contextgoes a long way ↖
A SECOND BRAIN FOR YOU. SHARED CONTEXT FOR YOUR AI.Web workspaceNative iPhoneChatGPT + MCP
ONE BRAIN. YOUR CHOICE OF AI.
Bring your own agent.
Keep the context. Choose the assistant. Connect your favorite AI through MCP or REST, and let it pick up the thread.
ChatGPT + Codex
OpenAI ChatGPT verified — official documentation or website
OpenClaw
OpenClaw Verified connection — official documentation or website
Hermes Agent
Nous Research Verified connection — official documentation or website
Claude Code
Anthropic MCP compatible — official documentation or website
Gemini CLI
Google MCP compatible — official documentation or website
Cursor
Anysphere MCP compatible — official documentation or websiteA shared brain, with a connection you control. ChatGPT, OpenClaw and Hermes have verified OpenBrain connections. Claude Code, Gemini CLI, Cursor and Codex support MCP; setup and authorized access are required. Capabilities depend on the client.
Building your own? MCP + RESTLogos identify their respective products. No partnership or endorsement is implied.
01 / THINKING MEETS DOINGAll the pieces.
All the pieces.
One connected place.
Good ideas rarely arrive neatly organized. Capture the thought, connect the context, and give it somewhere to go.
● ● ●OpenBrain / Creative launchILLUSTRATIVE WORKSPACE
◈
PROJECT
✓ SavedCreative launch
OverviewTasksNotes & sourcesImages
ABOUT THIS PROJECT
A little idea. A real next step.
Explore a warmer visual direction. Keep the references, decisions and next actions together.
Visual direction & references ↗
Next stepsBoard / Next up
To do 2
Review the visual referencesToday · High priority
Sketch the landing page
In progress 1
Write the first storyTomorrow
Done 1
Choose a direction✓ A good start
Synthetic example content. The real workspace is available to existing users.Explore the features ↗
02 / A WORKSPACE WITH A MEMORYFrom “I should save this”
From “I should save this”
to “I can use this.”
Notes, projects and AI context belong together. You can start with a rough thought and add structure when it helps.
A place to make progress.
Pin and order projects, choose icons and colors, and switch Card or List views. Subprojects and a compact Kanban or Next up list keep work focused.
A place to find it again.
Browse notes, sources, projects and images. Use collections to group notes and images, with image tags, details and fullscreen browsing.
Your next thought is close.
Press ⌘K to find notes, sources, projects, tasks and images. One contextual New dialog adds the next piece.
Answers with somewhere to point.
Ask your knowledge a question. Follow the evidence back to the original source, and keep the context behind an answer.
Your context travels with you.
A native SwiftUI iPhone app and a working private ChatGPT integration share the same records as the web workspace.
03 / CAPTURE. CONNECT. ACT.Less repeating yourself.
Less repeating yourself.
More picking up the thread.
Give it somewhere to land.
A note, a link, an image, a task. Add it through New, the iPhone app or an authorized AI assistant. No filing ceremony required.
Keep the context attached.
Sources keep their provenance. Processing extracts useful knowledge. Projects and shared collections give related work a home.
Make something of it.
Find the reference. Ask a grounded question. Pick the next task. Let your assistant work from your records instead of another blank chat.
04 / BUILT FOR TWO KINDS OF THINKERYour workspace.
Your workspace.
Your AI’s context.
You and your authorized agents work with the same notes, projects, tasks and images. One canonical record, whichever interface you use.
The private ChatGPT connection works today. Other compatible clients can connect through MCP or REST with their own configuration.
Meet the agent-native brainONE SHARED KNOWLEDGE LAYER
YOU · WEB + iPHONEYOUR AUTHORIZED AI
✳ OpenBrainNotes · Projects · Tasks · Sources · Images
86 MCP toolsREST APIScoped access
Retrieve context. Propose changes. Keep you in control.
The earlier you join,
the less you pay.
One payment. Twelve months of Cloud. No automatic renewal. The first ten founding passes start at $29; each next batch of ten increases by $10, up to $79.
See live availabilityA LITTLE MORE BRAIN FOODGood questions.
Good questions.
Honest answers.
What is OpenBrain?
An agent-native second brain: a workspace for daily notes, projects, tasks, sources and images, plus a shared knowledge layer your authorized AI assistants can use.
What can I use today?
The web workspace is available with paid Cloud access. Join the Founding 60 to get started, then use Google or email to create your account. The native iPhone app remains a private build, not an App Store release.
Does it remember everything perfectly?
No. Retrieval and AI processing have limits. OpenBrain preserves original sources, shows evidence for grounded answers, and keeps revisions so you can inspect and correct the context.
Can I use another AI assistant?
Compatible clients can connect through the REST API or the 86-tool MCP interface over HTTP or stdio. Access needs configuration and an authorized identity; capabilities depend on the client.
Is it open source? What does it cost?
The repository is currently private. A free self-hosted Community edition is planned. Cloud pricing is $9 monthly or $90 annually when subscriptions launch. The Founding 60 offer includes 12 months for a single payment, from $29. Creating an account does not include free Cloud access. See pricing and availability.
A SECOND BRAIN. A LITTLE MORE HEADSPACE.Keep the curiosity.
Keep the curiosity.
Carry the context.
OpenBrain is growing. Explore Founding 60 and the plans for Cloud and Community.
