Live on Mac & iPhone

Your Brain
already knows.

It already read your texts, mail, calendar, and notes. Ask it something only you would know.

what did I tell Mom I'd do?
Or start with one of these

Welcome in, there.

Brain is ready for you.

Download for Mac Get the iOS app

You forget almost everything.
It doesn't.

The friend you've gone quiet on. The Sunday dread you can't explain. The real reason things went sideways last spring. You're too close to see your own patterns. It isn't.

How it works

It reads. It connects.
It tells you.

No setup. No upkeep, ever.

Gmail iMessage Notion Slack Calendar
01
It reads your life
Gmail, iMessage, Slack, Notion, Calendar — connect what you want, skip the rest.
02
It connects the dots
"Running late" in iMessage. "Traffic on 101" in Gmail. Same excuse, three apps — Brain's the one that noticed.
Claude ChatGPT Cursor Gemini
03
It tells you what you missed
Ask anything, from any AI you use.

Your memory · every AI

Switch the AI.
Keep the memory.

Your memory follows you — Claude, ChatGPT, Cursor, any agent. Change AIs tomorrow. Your context is yours to keep.

Claude
brain ▸ recalled "Maria prefers mornings — you owe her the deck" → your reply already knows.
Cursor
brain ▸ recalled "we chose Postgres for the joins, 2023" → right in your editor.
ChatGPT
brain ▸ recalled "Vikram hates Scotch — El Silencio at Cosme last time" → dinner tonight, handled.
Your agents · MCP
brain ▸ the open standard — your context in every AI, on your terms.

Every AI is learning to remember you now.
None of them will let you leave with it.
Brain already does.

Your life, remembered

Every moment,
on one timeline.

Every text, photo, call, and place — pulled in, in order. Nothing lost.

Messages · Monday
Raj: "the Series B is happening — lunch Thursday."
Calls · Today, 8:47am
James on the M&A: "keep this quiet until the 15th."
Photos · Marrakech, 2022
The riad rooftop. You captioned it "best dinner of my life."
Notes · Q1 offsite
Dr. Chen: off the statin, retest in six weeks. Still open.
Photos · Milan, 2019
Marco's rooftop. The Barolo night.
Calendar · 2020
Amalfi with Elena. No agenda, no wifi, perfect.

Beyond recall

It looks out
for you.

Shared
One memory, everyone you love.
Share your restaurants, trips, and taste — straight from your texts. The more of your people on Brain, the more everyone knows.
Nudges
Never drop the ball.
"You promised Jess the trip photos — a week ago." Brain remembers, so you never break your word.

The whole game

The wine, the promise,
the thing you almost forgot.

Your life runs on memory you keep losing. Brain holds all of it.

The people
Brain noticed you've called your best friend "busy lately" in texts to three different people — about the same friend.
Promises
You've told your mom "I'll visit soon" seven times since April — Brain remembers what you actually meant to do.
Health
Ask why you can't sleep before a board update, and Brain finds three "mind racing" notes — always the same night, and you never noticed.
Travel
The hotel in Kyoto, the restaurant Mei loved, the flight that got cancelled — Brain still has all of it, four years later.
Taste
The playlist from the drive to Big Sur, the bottle you both loved at Marta's — gone the second you'd need it, if Brain didn't have it.
And you
The pattern you couldn't see, because you were the one living it.

Your company, remembered

Every decision,
on one timeline.

Every thread, call, contract, and ticket — pulled in, in order. Nothing lost.

Slack · 2 hrs ago
#deals: "Northwind verbally committed."
Calls · Monday
Globex: "send the security review by Friday."
Linear · Last sprint
Shipped the EU region. Three deals unblocked.
Gmail · 2024
Northwind terms: Net-60, $240k, auto-renews March.
Notion · 2022
The first sales playbook. Still the one we use.
Calls · 2020
Our first paid demo. They almost walked.

Beyond recall

Everyone starts
already knowing.

Shared
One memory, every agent.
Every rep, every agent, every AI — drawing from the same living memory. The more of your team on it, the smarter everyone gets.
Always on
Never asks twice.
"This customer hit the same bug in March." Brain surfaces the whole history before anyone — human or AI — has to ask.

Every kind of company

From three people
to three thousand.

The warning was always there — in a Slack thread, a call, a doc no one reread. Ask, and Brain already found it.

Founders
Ask why Sana quit, and Brain already read six weeks of her Slack — the tone shift was there the whole time.
Sales leaders
Ask why you lost Vantage, and Brain finds the engineer's "no SSO, dealbreaker" message — three weeks before the champion went dark.
Engineering leads
Ask if this rewrite's been tried, and Brain finds the pitch the team killed eight months ago — same diagram, same 40% latency spike.
People leaders
Ask if Devon's a flight risk, and Brain finds his 1:1 notes shrinking to one word — the exact same tell Camila gave before she quit.
Support leaders
Ask if Denholt's hit this before, and Brain finds the same bug, three tickets, three reps — nobody had connected them until now.
And you
Brain noticed you've promised yourself "I'll start Monday" — eleven Mondays running.

The whole point

Don't build a second brain.
Have one.

The smartest people are wiring their own — markdown files, Obsidian, a weekend of glue. Brain just works.

Builds itself
It updates every day. The longer it runs, the more it knows.
Ready before you ask
The follow-up drafted. The promise flagged. The context waiting before the meeting starts. You still hit send.
Yours to audit
Read every memory. Edit or delete any of it. See everything it's drafted for you.

Works everywhere

Connect anything.
Recall anywhere.

iMessage, Gmail, Slack, Notion — and dozens more. Connect once. Brain reads them all and serves your context to any AI you use.

Your life Mac & phone
Messages Mail Calendar Contacts Notes Photos Reminders Location
Your company your stack
Slack Notion Gmail Salesforce Postgres S3 Linear Webhooks

Anything with an API.  Works with Claude, ChatGPT, Cursor, and any agent.

Where this goes

Today, Brain is a real app on your Mac and iPhone. It reads your life, catches what you missed, and shows the receipt for every answer. Tomorrow, it’s the AI that thinks like you — built on your life, and only your life.

Every model plugs in — Claude, GPT, whatever comes next. Models rotate. Your memory doesn’t.

By 2030, everyone will have a second brain.
Most will be renting one.
Yours will be a deed.

Own yourself

Own your data.
Own your AI.
Upgrade your brain.

Whoever controls your memory controls the AI that becomes you.

ChatGPT knows millions of people like you. Brain knows only you.

Delete it and it’s actually gone. No copy sitting on someone else’s server.

It knows you.
It works for you.
It answers to no one but you.

Convinced? Text it.

Same Brain. Your life instead of ours.

Welcome in, there.

Brain is ready for you.

Download for Mac Get the iOS app