Bai OS

Your personal AI

Your world, in one conversation. It picks up context as you go — and gets ahead. All in WhatsApp.

Your notes, plans, people and files, all in one ongoing conversation — no separate chats to juggle.
The more Bai knows your world, the more it gets ahead of you.

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. Nothing to build. 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
Search · "Atlas"
Sort · Recent A

Fresh from your WhatsApp thread

2 items · updated 2 min ago
Project · Brief Atlas Tomorrow 10am MARÍA · ATLAS

Atlas · Brief for tomorrow's sync with Sarah

Last sync (Aug 12) flagged 2 blockers. Pricing memo overdue 9 days. Sarah waiting on legal review and v2 wireframe feedback.

Last sync Aug 12 12 days ago
Open items 4 2 yours · 2 hers
Overdue 9 days pricing memo
Updated · 3:40 PM · from WhatsApp Open thread →
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?
A · WhatsApp Self-sufficient. That's the point. Save anything — voice notes, links, photos, receipts. Ask Bai anything back. Search, summaries, follow-ups, all in the chat. You never need to leave to make it work.
B · Space Same brain. Easier on the eyes. When you want to sit with everything — read a long article, scrub a meeting, browse what you've saved — Space gives the chat room to breathe. Same memory, more comfortable surface.
· Either, both, neither No app. No new habit. Use just WhatsApp forever — Bai works fully there. Open Space the days you want a wider view. The brain is the same on either screen; you choose where to spend the time.
What Bai keeps for you

Your whole world, remembered.

You talk, Bai keeps it — your day, your people, your context, without asking twice.

📋

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 · one conversation

A personal AI with zero setup.

💬

You tell it

Type or send a voice note — your day, your people, whatever's on your mind — straight into WhatsApp.

🧠

Bai remembers you

It keeps your context and ties each thing to what came before, so you never repeat yourself.

✅

It keeps up

Brought back at the right moment, however you remember it — and sometimes before you even ask.

You talk. Bai remembers.
No onboarding. No dashboard. No system to build first.

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."

Agent reactive

Gets it done, right when you need it.

Brain proactive

Remembers what matters and brings it back before you ask.

Pricing

Move forward without losing anything.

Prices in USD.

9 days free
Bai Go 9 days free

Your external brain on WhatsApp.

$ 9 USD/month

9 days free · then $9/month

Includes
  • Notes: create, search, archive, tag
  • Audio, images & voice transcription
  • Saved views, statuses & custom tags
  • Google Calendar — view & create events
  • Proactive reminders when they matter
  • Plenty of room for your notes, audio and files
Try Bai Go 9 days free →

Encrypted · Never sold · Delete anytime

Common questions

The short version.

Add Bai to your WhatsApp contacts and start talking to it. Tell it about your day, your people, your plans — Bai keeps your context, brings it back when you need it, and reaches out first when something's time-sensitive. No new app to open; your personal AI lives in the conversation you're already in all day.
No. There's nothing to build — no databases, no templates, no folders. You just talk, and Bai does the organizing and remembering. Sign in with Google, connect WhatsApp, and start talking.
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.
It actually remembers. Bai keeps your context across every conversation — details you shared weeks ago come back without you re-explaining. And it goes further than a chatbot's memory: Bai holds your whole operational world — your agenda, people, and files — and acts on it, reminding you before things slip.
Bai is built around your world, not the open web. It'll pull something external in when you ask — a quick lookup, a comparison — but its job is your stuff: your notes, plans, people, and files. Keeping your world at the center is exactly what lets it hold your context and get ahead of you.
Ready when you are

Stop repeating yourself.
Start being remembered.

Try Bai Go — 9 days free →

Your move.