One brain for everything is one brain for nothing.
If you run a consulting practice, you probably hold three or four conversations a day that have nothing in common. A client retainer. A marketing experiment. A new framework you are sketching. A founder you are mentoring on the side. Drop all of that into one AI knowledge base and search starts answering the wrong question. The brain pulls a client quote into a marketing idea. The wrong project gets cited at the wrong meeting. Worse, you stop trusting the answers, because you cannot tell where the context came from. The fix is not less capture. The fix is brains with edges.
One account
Many brains, one connection
How multiple brains work
- 1
Spin up a brain per stream
Create a brain for each meaningful stream of work. Personal life. One per client. One for your content engine. One for the side project. Each brain is its own knowledge graph with its own entities, its own documents, and its own history. They do not bleed into each other.
- 2
Capture straight into the right one
Every upload path lets you pick a brain. The web app, the API, the MCP connector, and Zapier all accept a brainId. Your default brain catches anything you do not route. Make a habit of routing the client work, and the marketing material stops appearing in client briefs.
- 3
Search across all, or narrow to one
By default, every question spans every brain. That is the right default when you are exploring or connecting ideas across streams. When you need the answer to come from one brain only, name it: 'search just my Marketing brain.' Both work from the same connection, no switching.
Who multiple brains are for
Consultants juggling clients
One brain per client. Every transcript, every doc, every framework lands in the right space. Client A's pricing experiment never shows up in Client B's briefing.
Coaches with public + private work
A Personal brain for journals and decisions. A Coaching brain for client material. The marketing brain for posts you draft. Ask each one its own questions.
Builders with parallel projects
A brain per product, a brain per book, a brain per research thread. Voice memos, articles, and meeting notes go to the brain they belong to. Patterns surface across all of them when you want.
What you walk away with
- Separation by design (entities and documents do not cross brains)
- One connection in Claude, MCP, and Zapier covers every brain
- Search spans all brains by default, narrows when you name one
- Per-brain notifications when long documents finish analysing
- You stay in the loop. The brain captures, you decide what matters
Route to the right brain from where you already work
Frequently asked questions
How is this different from having two accounts?+
Two accounts means two logins, two subscriptions, two MCP connections, two API keys, two of everything. Multiple brains live under one account. One login, one connection, one bill. You pick which brain when you upload, and search spans all of them by default.
Can two brains share a document or entity?+
No. Each brain has its own entities and its own documents. That is the point. Separation by design. If you want a fact in two brains, upload the source to each. It keeps trust high: when an answer cites a source, you know which brain it came from.
What does the default 'search across everything' look like?+
When you ask a question without naming a brain, your brain pulls evidence from every brain you have and labels each fact with the brain it came from. Useful for cross-stream pattern questions ('what keeps coming up across my coaching clients'). When you only want one brain, name it in the question.
Can I limit a brain to a specific person on my team?+
Today every brain belongs to your account. Multiple brains is about one person's many contexts, not many people sharing a context.
Does this work from Claude and Zapier?+
Yes. In Claude, the MCP connector exposes list_brains so Claude knows which brains you have, and every upload tool accepts a brain id. In Zapier, the Brain Graph app's upload actions take a brainId field. Point each Zap at the brain you want it filling.
Will my Free plan limit apply to each brain separately or in total?+
In total. Plan limits count across all your brains, so you can split your 40 free documents across as many brains as you want without paying for separation. Upgrade when you outgrow the limit, not when you outgrow one brain.
Can I rename or delete a brain later?+
Yes. Brains are managed from your account settings. Renaming is safe. Deleting a brain removes its content for good (same caution as deleting an account).
One account. Many brains. Every kind of work.
Start free with 40 documents. Split them across as many brains as you want.