THE NEW GENERATION OF PERSONAL ASSISTANTS
Other assistants start from zero on every question. César already knows what landed in your inbox, what's on your calendar, who owes you and what's due tomorrow. You just say it in your own words — he understands, acts, remembers and comes back before it becomes a problem.
1,525 active users
call the clinic and cancel my appointment tomorrow
Just called: spoke to the front desk and tomorrow's appointment is canceled. They offered Thursday at 2pm — take it? The full call transcript is right here in the chat.
take it
chase Carla for the R$ 350 for the cake, gently
Sent. I introduced myself, mentioned Saturday's cake and shared your payment code. You can see the whole conversation here.
Carla: Oh no, I forgot! Just paid, sorry 🙏
Alert · today, 08:00The building fee is due today: R$ 612.00. Found it in your email. Barcode copied below — just paste it in your bank app.
thanks, paid
Logged under Housing. Next one is the internet bill on the 15th — I'll ping you that morning.
watch flights São Paulo → New York for Friday and tell me if the price drops
Done. I'll check every day at 8am and only show up when it changes.
Alert · Tue, 08:02It dropped: R$ 3,190 round trip on LATAM (was R$ 4,480). Shall I book?
0:04 Voice note: spent 48 90 on lunch, on the card
“spent 48 90 on lunch, on the card”
Logged: R$ 48.90 under Food, on the card. You've used 62% of this month's budget — and on the 1st the monthly summary arrives ready.
make an 8-slide deck with the quarter's results, use the spreadsheet I sent you
Ready: q3-results.pptx, 8 slides — revenue, margin, top 3 clients and the month-by-month chart. Want a PDF too?
build an app to track the rent on my 4 studio apartments
Published: Rentals is now on your Dashboard — tenants, due dates and receipts. I'll ping you on each due date and whenever one runs late.
NO CONTEXT × WITH CONTEXT
The same three-word request, on a generic assistant and on César.
pay the building fee
GENERIC ASSISTANT
“Sure! How much is it? Which bank? Could you send me the bill? I can walk you through paying it in the app…”
He doesn't know who you are. Every question is the first one: you explain, he answers, and the task is still yours.
CÉSAR
“R$ 612.00, due today — found it in your email yesterday. Barcode copied below, just paste it in your bank app. I'll log it under Housing once you confirm.”
He read the email, recognized the bill, knows the category and the date. Three words are enough because he already had the rest.
WHAT HE KNOWS ABOUT YOU
You connect what you want — and each source teaches César to act for you, without you having to explain.
He knows the building fee arrived and is due on the 10th.
So he pings you on the morning of the 10th with the barcode already copied.
He knows you have the dentist Friday at 9 and a meeting at 10.
So he calls the clinic and moves it before the two collide.
He knows who Carla is, and that she still owes you R$ 350 for the cake.
So he sends the reminder on WhatsApp, gently, and shows you her reply.
He knows you've already spent 62% of this month's food budget.
So he reins in the restaurant enthusiasm — and closes the month for you on the 1st.
He knows your flight to New York is Friday and the fare was R$ 4,480.
So he watches the price every day and only shows up when it drops.
He knows you want to get back to running three times a week.
So he builds your training week, marks what Strava logged and adjusts the next one.
WHAT HE DOES WITH IT
Context only matters because it turns into action. César reads what comes in, does what needs doing and only comes back with the news that it's handled — everything crowding your head, on its way out of it.
Say “spent 48 on lunch” in a voice note and it's logged. The bill that lands in your email becomes an alert with the barcode on the due date, the invoice files itself under the right purchase, and on the 1st the month's summary shows up ready. You live; he keeps the books.
Canceling the dentist, confirming the reservation, asking if the order is ready: César calls, talks to whoever answers and comes back with the answer — full transcript in the chat. The call you've been putting off for a week goes out in one request.
“Tell João I'll be 20 minutes late.” César messages them on WhatsApp, introduces himself, gets it done and shows you both sides of the conversation — and you take over whenever you want. Chasing, confirming, warning: delegated.
Calendar, reminders and a daily briefing with what matters: the meeting, the bill due today, the parcel out for delivery. “Remind me at 6pm” fires at 6pm sharp — in the app, on Telegram or on your phone.
The flight you want, the product waiting for a price drop, the plane that might be delayed, the parcel on its way, your car's road tax: César watches it all while you do something else — and only shows up when there's news.
A spreadsheet of your expenses, an 8-slide deck, a chart of your data, a contract summarized, PDFs merged, an image created from scratch, a video trimmed for Instagram. You describe it; the file comes back in the conversation, ready to send.
And this is just the beginning.
Everything that flows through your digital life can become something César takes care of for you. The limit is whatever your creativity allows.
I want César looking after meHOW IT WORKS
Free, right in the browser. With email or your Google account.
Calendar, email, files, WhatsApp, Telegram — you choose what he can see and where he talks to you, with the permissions you grant.
No menus, no forms. Write or send a voice note as you would to a person — in the app, on WhatsApp or on Telegram — and watch it happen.
CONTEXT GROWS OVER TIME
César doesn't need setup. He needs time with you — and every day he gets more useful.
You connect your email. He's already found three bills, a ticket and the hotel booking — and shows you what's due this week.
He already knows who Carla is, who your dentist is, what you spend on lunch and where you prefer to be notified.
He warns you before you remember. The bill, the flight, the payment, the birthday: handled before it becomes a to-do.
WHERE YOU ALREADY CHAT
On one side, you talk to César from where you already are. On the other, he sorts out with people what you don't want to stop and handle — and you follow everything, with the conversation one tap away from being back in your hands.
Connect in one tap and @UseCesarBot becomes your pocket César: ask, answer, remember, alert.
Talk to César through his official number — and ask him to talk to other people for you: confirming a time, chasing a payment, warning about a delay.
You decide where César alerts you — phone, WhatsApp, Telegram or none — and every conversation he has with someone else on your behalf stays visible to you, one tap from taking over.
PRICING
César charges for what you use, in César Tokens. Everyone starts with 1 million a month, free, for as long as they like. A plan gives you more tokens for less than buying them one-off — and you can cancel any time.
$0 /month
1 million César Tokens per month
about 160 conversations a month
Use César every month without paying, with no end date. The allowance renews by itself every 30 days; whatever is left does not carry over.
R$ 29.90 per month
4 million César Tokens per month
about 650 conversations per month
For people already using César daily. 25% cheaper per token than buying one-off.
Most chosen
R$ 299 per year
7.5 million César Tokens per month
about 1,200 conversations per month
For people who really delegate — one charge a year, under R$ 25 a month.
Every allowance — the free one and the plans' — is for the month and does not roll over. When you subscribe, the plan allowance replaces the free one; if you cancel, you go back to Free automatically. Only one-off tokens are kept and never expire. Conversation estimates are averages — real usage depends on how big each request is.
FREQUENTLY ASKED QUESTIONS
Short, straight answers. If your question isn't here, just ask César himself — or talk to us.
ChatGPT talks; César does. He's connected to your things — calendar, email, finances, WhatsApp — so “cancel the dentist” doesn't become a text explaining how to cancel: it becomes the dentist canceled. And he remembers you from one day to the next, so you never start a conversation from scratch.
Nothing, if you want. Every account gets 1 million César Tokens a month, free and with no end date — enough to use César all month without paying. If they run out early, buy one-off tokens (which never expire) or subscribe from R$ 29.90/month. Every cent of usage is visible on the Usage screen: how much, on what. No catch, no hidden charges.
Every 30 days you get 1 million César Tokens to use however you like — about 160 conversations. Whatever you don't use in the period does not carry over: next month it's 1 million again. No card, nothing to renew and no trial deadline. If you subscribe to a plan, its allowance takes the place of the free one; if you cancel, you go back to Free on your own. Only the one-off tokens you buy are kept and never expire.
You choose what to connect and what each integration can see — and you can disconnect it instantly, from your profile. And there's one rule with no exceptions: any action with an effect outside the conversation — sending an email, touching an event, making a purchase, changing a file — only happens after you confirm it. César proposes; you press the button. And when he talks to someone for you, on WhatsApp or by phone, you see the whole conversation and take over whenever you want.
César reads what you connected in order to work for you — and that's it. Your data is not sold or used for advertising, and you can request an export or full deletion at any time. What he keeps about you exists to serve you, not anyone else.
No. Open it in the browser, create the account and send the first message — it takes a minute. If you prefer, there's an iPhone app on the App Store, and you can talk to him straight from Telegram or WhatsApp without opening anything new.
He watches what comes in: a bill becomes an alert on the due date with the barcode, a parcel warns you when it's out for delivery, a flight warns you if it changes, and in the morning you get a summary of your day. All of that is notice — to act outside the conversation, he still asks for your confirmation.
It does. César builds spreadsheets, slide decks and PDFs from a single request, summarizes contracts before you sign, chases clients on WhatsApp in your name, generates payment codes so you get paid and builds a custom app to track clients, orders or rentals — no developer needed. All through the same conversation.
It is. The subscription cancels in two clicks, no fee and no call to “understand your reasons”. Leftover one-off tokens stay yours. And if you want out for good, account deletion erases your data — right from your profile or the app.
Create your free account, connect your email and feel the difference between an assistant that starts from zero and one that already knows — in under a minute.
Start for free