Bai OS

AI note-taking with memory

Notes that take themselves. You send it. Bai files it — and brings it back. All in WhatsApp.

Voice, photo or text — dump it however it comes out. Bai sorts it, and recalls it when you need it, however you remember it.
No folders, no busywork.

Try Bai Go free Then $9/month

Sign in with Google Bai lives on your WhatsApp Zero setup

Your data stays yours — export or delete anytime.

No app to open. No folders to make. You just talk.

"Hey Bai, how's the restaurant p"

One brain · Two windows

Talk to it on WhatsApp. Open Space when you want to think.

WhatsApp is enough — talk, forward, ask, recall. Space is the same brain on a bigger canvas: same memory, more room to think.

A WhatsApp / self-sufficient · save, ask, get answers
B Space / same brain · cleaner view, more room to think
Memory This week
Sort · Recent A

Fresh from your WhatsApp thread

2 items · updated 2 min ago
A
Voice note · 0:05 3:39 PM · WhatsApp
0:05
"Hey Bai, I have the Atlas meeting with Sarah tomorrow — give me a rundown of what's pending and what I owe her."
Bai noticed
Last time you discussed Atlas, Sarah flagged two blockers . One's been open 9 days — want to unblock it before tomorrow's call?
Notes & tags

You talk. The structure happens on the other side.

You never have to think about organizing — only about doing. No folders to maintain, no templates, no blank page asking you for a method.

You say
"Just talked to María from Innotech, she wants the enterprise plan for March"
What stays
Note #47

María (Innotech) wants the enterprise plan for March.

Client:Innotech Contact:María Priority:High
Follow-up in March

Everything is a note

"What I say lands, and nothing gets lost."

An idea, a task, a receipt, a photo, a voice note. It all comes in where you already talk, and stays as text you can search. The original is kept.

Tags by scope

"Everything about María exists without me filing anything."

Bai tags by scope, not in folders: client, project, contact, priority, status. You don't maintain them — but you can correct them whenever you want.

Search by meaning

"I find it however I remember it."

You don't need the exact words. Ask the way you remember it and Bai brings it back, dated and sourced. If it isn't sure, it says so — it never invents.

Saved views

"I can save a way of looking at my things."

A way of looking, saved with a name: list or board, by tags and statuses. Each front of your life gets one living place to come back to.

What Bai keeps for you

Every note, sorted and waiting.

You send it by voice, photo or text — Bai files it and brings it back, without you filing a thing.

📋

Projects

Tracks progress without you checking in.

💡

Ideas

Captures now, connects later.

❤️

Wellness

Remembers your habits, not just your requests.

👨‍👩‍👧

Family

Coordinates so you don't have to.

✈️

Travel

Plans around what you actually like.

💰

Money

Knows who owes you. Follows up.

…and anything else you can think of. Just say it.

Three steps · no folders

Note-taking with zero busywork.

💬

You send it

A voice note, a photo, a quick thought — straight into WhatsApp.

🧠

Bai files it

It sorts and tags each note and ties it to what came before.

It recalls itself

Brought back however you remember it — sometimes before you even ask.

You talk. Bai files it.
No folders. No tags to set. No system to build.

What people say
C

Carlos M.

entrepreneur

"I stopped trying to hold everything in my head."

L

Laura S.

designer

"I capture ideas while walking and they're already sorted when I get back. Nothing slips anymore."

D

Diego R.

student

"My whole semester lives in Bai and I never set it up. It just remembered what mattered, in time."

One mind · Two tempos

It answers when you talk. It thinks when you don't.

Agent reactive

Gets it done, right when you need it.

  • You never repeat context: it connects what you just said to everything you already gave it — this note, this thread, this person.
  • No re-explaining who you are. One continuous conversation, with natural pauses between days.
  • If you talk to it, it answers. Fast and faithful: nothing invented, nothing lost, nothing extra.

Brain proactive

Remembers what matters and brings it back before you ask.

  • It thinks when nobody's looking: a commitment about to slip, a connection you can't see, a pattern that repeats.
  • Proactivity isn't scheduled messaging — it's what Bai finds.
  • A few messages a day. An ignored one isn't repeated tomorrow, and "not now" is respected. If it finds nothing worth saying, it stays quiet.

One mind, two tempos. Both speeds read and write the same memory — there are no separate worlds to sync.

Pricing

Move forward without losing anything.

Prices in USD.

Common questions

The short version.

Send Bai a note by voice, photo or text and it files and tags it for you. The difference from a plain notes app: Bai remembers. Details you saved weeks ago come back without you searching, and it reaches out first when something's time-sensitive.
No. No folders, no tags to set, no filing. You just send it and Bai does the sorting and the remembering. Sign in with Google, connect WhatsApp, and start.
Yes — that's the point. Send a voice note on the go, a photo of a receipt or a whiteboard, a PDF you don't want to read. Bai pulls out what matters and files it.
Yes. Data is encrypted in transit and at rest on Google Cloud infrastructure. We never sell or share your information, and you can export everything or request permanent deletion anytime from your portal.
Ready when you are

Stop filing your notes.
Start being reminded of them.

Try Bai Go — 9 days free

Your move.