Second Brain Studio turns the exports you can download from LinkedIn, Google, Slack and 24 more into one private brain on your machine. See it as a graph. Ask it, with receipts. Give it work to do.
Mac (Apple silicon and Intel), Windows and Linux · free · all downloads
Built from the exports you already have
Opens inObsidianClaude CodeCodexGBrain
The phone app · iPhone & Android
The app builds the brain on the phone itself — import your exports, and nothing is uploaded, with no account. Then talk to it, walk the graph and add sources wherever you are.
What it does for you
Get set up in minutes
Use the AI you already pay for — Claude Code, Codex or your own API key. One guided setup installs everything for you: no terminal, nothing to set up by hand.
Is it hard to set up? No terminal. Setup runs your AI maker’s official installer, opens its sign-in, then installs the brain builder and the agents in one click. The seven steps
Does it need my AI subscription? It uses the AI you already have: Claude Code or Codex on the plan you pay for, or an API key — and chat also works with a model on your own computer (Ollama, LM Studio). An API key builds the brain and chats; the agents run on Claude Code.
See it
LinkedIn knows your career, Facebook your weekends, GitHub your code. Studio puts every export into one graph, with one record per person — Resolved when two or more exports know them, matched by name.
What it’s made of — the whole brain in one drawing: exports at the base, kinds of notes in the middle, answers and agents on top.
name-onlyMatching is by name only — exact after normalising, so initials and variant spellings stay separate, and no AI decides a merge. Two different people with one name would share a note; better matching is on the roadmap.
How does it know two records are one person? By name. When two exports agree on a person’s name they become one note, marked Resolved, and the note lists every export that knows them.
Ask it
Ask in plain English. Brain recall starts from your question and follows the links in your brain to the notes that matter — then shows you which ones. The answer cites them, and a chart shows exactly what it counted.
Or just say it.on-device voice
Brain › Avatar answers out loud with a short spoken summary while the full, cited answer lands in the chat. Hearing and voice run on your computer.
snapshotYour brain is as fresh as your last export: sharp on history, blind to this week — until you press Update.
Won’t it make things up? It is told to answer only from the notes Brain recall found and to cite each one, so every claim can be opened. Charts use only numbers counted in your brain.
Put it to work
Four agents run on your brain in the desktop app, a daily each toward a goal you set. They sweep, draft, fill, plan and send — and hold the gates you set before anything that can’t be undone.
Get hired through people you already know
Every weekday: sweeps the open job boards and employers’ own careers pages against your criteria, writes a different CV per role from your own facts, fills the form — and stops at three gates: pick the job, approve the CV, submit. Its goal counts interviews, never applications.
never submits without you · never types a credential · never logs in to a job board · writes 45-jobs/
Get funded without sending a single email you didn’t approve
Every weekday: new programs and investors through your own filter chain, verified on their own sites, applications in your own Chrome behind the gate, an email angle per investor, and what is due — in a dated note, with the Funding Plan kept current.
never sends · never posts · a fund is “contacted” only when you say so · writes 46-fundraising/
A traveller in your own city — and the trip from places you already saved
Every day: what is new to try near you — a coffee, a meal, an activity, an event — from your own saved and loved places first, where you said you are, never your device. For a trip: the itinerary on the Map, then flights, stays and food shopped in your own browser.
books nothing · every price says when it was seen · writes 47-travel/
Fill your pipeline from people who already know you
Every weekday: leads from your own brain first — warm ties, stalled deals, intro paths — then companies with a reason to buy now; a strategy per account (try, use, buy or partner) and the ways to reach out, ranked; the buying team, your sequences, the replies — every account on its line in Runtime.
sends only from your own mailbox · every send through the guard · the first real send always asks · no bought data · writes 48-sales/
Before anything that can’t be undone, the agent stops and asks: the document, each field with where it came from, what happens if you approve — and what it will never do. Deny takes a reason, and the next run reads it.
waits for yousends only through the guardbooks nothing
Will it act without me? Not by default. Autonomy is a level you set per agent, and the shipped default is supervised: anything irreversible waits for your Approve.
Where do agents run? In the desktop app — or a browser Studio you run yourself — through your own Claude Code. The hosted browser Studio is a read-only demo.
Goals & routinesdeveloper preview
awake onlyRoutines run while your computer is awake and Studio is open or in the menu bar; a missed run says so. Several run side by side, under a cap you set. Every background option is off until you turn it on.
Runtimedeveloper preview
See who is working, on what, and whether anyone needs you — every step in plain words.
this computerRuntime shows the runs on this computer; the hosted demo has no agents installed, so it has none. Stop is always your click.
Memory
Every chat and every agent keeps a memory inside your brain and reads it before it acts. Correct it once; the next run starts from the correction.
Never apply to a former employer (Meridian Labs, Loopr Logistics).Rules, preferences, corrections.Remembered · Undo
Analytical Engines (VP Product) led to an interview…Outcomes add up to evidence.Remembered · Undo
Postings that name the factory floor in the first paragraph score 10+ higher on fit than ones that lead with the stack.Learned by the agent from the outcomes.Inferred · yours to keep or remove
Every save shows Remembered · Undo. From John’s demo brain, under _memory/ — edit or forget any line.
Keep it yours
Your brain is a folder of plain Markdown on your disk. The builder makes no network calls, never reads message text, and keeps passwords, login records and payroll files out — rules you can read in the source.
# common.py — the Collector every adapter writes through def add_person(self, source, name, …, email="", phone="", …): if not name or EMAIL_RE.search(name): return # never store a "person" whose name is an email # PII only enters in full mode; otherwise coerced to "" email = (email or "").strip() if self.full else "" phone = (phone or "").strip() if self.full else "" def add_message_signal(self, source, party_name, date="", ts=""): """Records ONLY that a message exchange happened + when. Never the body.""" # company/slack.py # NOTE: m.get("text") deliberately NOT read. # company/google_workspace.py QUARANTINE = {"payroll", "salaries", "loginaudit", "passwords", …}
Enforced in source you can read. View it on GitHub
your providerWhen you chat, the question and the notes it needs go to the AI you chose, with your key or sign-in — or nowhere at all with a local model.
Is anything uploaded? Not to us: there is no account and no server of ours in the loop. The privacy model
Give it a goal
The questions Studio suggests on each demo brain, word for word. Open one and ask — in your browser, nothing to install.
A digital twin, from LinkedIn, Facebook, Instagram, Google, GitHub, Strava and more.
A Company Brain, from Slack, Google Workspace, the LinkedIn Page, Salesforce, Jira, Notion and a docs repository.
Agents take it further: the Jobs Agentv1.7.0 · shipped for a job hunt, the Fundraising Agentv0.4.0 · preview for a raise, the Travel Agentv0.2.0 · developer preview for a trip, the Sales Agentv0.2.0 · developer preview for a pipeline. What each agent does
For teams
Slack, Google Workspace, your LinkedIn Page, Notion, Jira, Salesforce, HubSpot and the rest — 14 company sources become one Company Brain that answers “who knows this?” on day one.
Wherever you are
The desktop app builds your brain and runs the agents on Mac (Apple silicon and Intel), Windows and Linux. The browser shows the two demo brains. The phone app builds a brain on the phone itself.
Four personas: Elena for your brain; Marcus, Lucia and James for the agents.
⌘K searches people, places, posts and notes as you type.
Runtime › Lines: every item stage by stage, and the worker on the one it’s touching.
The Map draws your saved and visited places — and the trips the Travel Agentv0.2.0 · developer preview plans.
A newer export re-imports in place; a Rebuild sets your work aside and puts it back.
Every view, both ways — and every screenshot on this site follows your theme.
demo onlyThe hosted browser Studio is a read-only window onto the two demo brains. Your own brain is built by the desktop app or the phone app.
Start
Free and open source. Start with John’s demo brain while your exports arrive.
Second Brain Studio · Mac (Apple silicon and Intel), Windows and Linux · free · MIT
Just looking? Open Studio in your browser — two demo brains, nothing to install
