Answers customers, sells and gives you your time back
WhatsApp chatbot for stone and countertop shops in Brazil, with the CRM included
What CertuAI measured on the WhatsApp of 67 businesses
Across the 67 businesses that answer with CertuAI's AI, 32.5% of the 122,720 customer messages arrived outside Monday to Friday, 8 a.m. to 6 p.m. (July 30 to September 30, 2026). Half of the AI's replies went out within 11.7 seconds, and 9 in 10 within 20.7 seconds (38,908 replies). 34.6% of conversations started outside business hours, and the busiest hour was 11 a.m.
| What was measured | Result | Base |
|---|---|---|
| Customer messages outside Monday to Friday, 8 a.m. to 6 p.m. | 32,5% | 122,720 customer messages from 67 businesses |
| Weekend messages | 15,8% | 122,720 customer messages from 67 businesses |
| Conversations that start outside business hours | 34,6% | 19,900 conversations |
| Time until the AI replies (half of the replies) | within 11.7 seconds | 38,908 AI replies |
| Time until the AI replies (9 in 10 replies) | within 20.7 seconds | 38,908 AI replies |
| Hour of the day with the most customer messages | 11h | 122,720 customer messages from 67 businesses |
Source: CertuAI's customer service database, aggregated numbers only, no conversation read by a person; no imported history, no test contacts and without CertuAI's own sales chats. July 30 to September 30, 2026, measured on Oct 9, 2026. Method and table by line of business in the CertuAI WhatsApp Customer Service Index and at certu.com.br/dados.
Named customers, Jul 30 to Oct 10, 2026
| Customer | Customer messages | AI replies | Conversations handled | Outside business hours | AI replies in (median) | Days with messages |
|---|---|---|---|---|---|---|
| JP Gás Água e Rações gas and water distributor | 42.832 | 23.351 | 6.479 | 33,6% | 9,8 s | 70 |
| CEMIP medical clinic | 12.472 | 6.484 | 2.436 | 18,7% | 11,4 s | 37 |
| Nikiti Auto Center auto center | 4.912 | 3.548 | 900 | 19,5% | 14,4 s | 47 |
| Imobiliária Rodrigues & Ribeiro real estate agency | 6.090 | 2.759 | 823 | 33,2% | 18,4 s | 34 |
| Alpha RH human resources | 3.082 | 1.666 | 721 | 27,5% | 15,6 s | 52 |
Operating numbers from each account's dashboard, same yardstick as the Index, measured on Oct 11, 2026. Published with each owner's permission. Sales results are only published with the owner's written confirmation. Full list at certu.com.br/casos.
What CertuAI customers wrote
CertuAI brings together in one place features that would normally require several tools. Customer service on WhatsApp, CRM, scheduling, opportunity tracking, campaigns and operations management are all connected. Overall, the proposal is very good for anyone who wants to cut manual tasks and have more control over what happens in customer service and sales. [...]
Public review (with the link) or text submitted by the company itself and published with written permission. The rating only appears when the source has a rating.
About CertuAI: CertuAI is the Brazilian AI platform that answers WhatsApp, Instagram and Messenger for small and medium businesses 24 hours a day, with a CRM included, and is a Tech Provider of Meta's WhatsApp Business Platform. Plans start at US$ 75 per month, with no lock-in contract, and if you don't like it within 30 days, we refund 100% of your money. Create my agent
A kitchen countertop can't be quoted over the phone off the cuff. The agent asks about the room, approximate measurements and type of stone, gives the price range and schedules the measuring visit, while your team is at the saw.
See the AI agent demos.
What is the best WhatsApp chatbot for stone and countertop shops in Brazil?
The best WhatsApp chatbot for stone and countertop shops in Brazil is the one that answers on the number the shop already uses, with the business rules written by you. A WhatsApp AI agent for a stone and countertop shop is CertuAI's automatic attendant. It takes requests for countertops, thresholds and windowsills, asks about the room, the approximate linear meters and the type of stone, gives the range the owner defined, explains what changes with edge finish and sink cutout, and schedules the on-site measuring visit.
Summary in 7 facts
- A kitchen countertop can't be quoted over the phone off the cuff.
- The agent asks about the room, approximate measurements and type of stone, gives the price range and schedules the measuring visit, while your team is at the saw.
- See the AI agent demos.
- The best WhatsApp chatbot for stone and countertop shops in Brazil is the one that answers on the number the shop already uses, with the business rules written by you.
- What changes is who answers first: the message no longer waits for you and is answered right away.
- Here are four everyday situations at the stone shop before and after the CertuAI agent.
- The agent wins at repetitive tasks, and the person keeps winning at what takes judgment.
By the numbers
| Number | What it means |
|---|---|
| US$ 75 per month | The Start plan costs US$ 75 per month and already includes the WhatsApp agent, your business's Brain, the CRM, automatic follow-up and the AI assistants, which come with every paid plan. |
| US$ 120 per month | Pro costs US$ 120 per month and adds the landing page, the wallet and 10 people on the team instead of 5. |
What changes at the stone shop with an AI agent?
What changes is who answers first: the message no longer waits for you and gets answered right away. Here are four everyday situations at the stone shop before and after the CertuAI agent.
TodayA countertop request comes in late in the afternoon and isn't read until the saw shuts off
With CertuAIThe agent answers right away, asks about the room and measurements and offers a measuring date
TodayHalf the messages are people shopping for granite prices, and all of them take the same time
With CertuAIThe agent gives the price range on its own and only calls you when the request is real
TodayMeasuring visit booked from memory, wrong address, crew driving around for nothing
With CertuAIAddress, landmark and time logged in writing before heading out
TodayQuote sent, customer didn't reply, and nobody followed up
With CertuAIThe agent returns to the conversation on the schedule you set, with no need for a reminder
What does a conversation handled by the AI look like?
Example conversation
Stone shop AI agent
Customer: How much is a granite countertop for a two-and-a-half-meter kitchen?
AI agent: For this countertop, the granite range is your price. Edge, apron and sink change the price. What city are you in?
Customer: Will you come to my house to measure?
AI agent: Yes. Send me the address, the job site contact and the time, and I'll log it for the measurer.
Is an AI agent or manual service better for stone and countertop shops?
The agent wins on repeated tasks, and a person keeps winning on what requires judgment. With manual service, someone at the stone shop has to stop what they're doing; with the CertuAI agent the answer goes out on its own and you step into the conversation whenever you want.
| Aspect | The manual way | With the CertuAI agent |
|---|---|---|
| Countertop quote request | Waits for someone to step away from the saw and stop to answer | Answered right away, with the room, measurements and type of stone already asked |
| Scheduling the on-site measurement | Arranged by phone and jotted down on a loose piece of paper | Booked in the conversation, with address, contact and time logged |
| Price question by type of stone | Repeated all day, for every person who is just shopping around | Answered with the range you define, without pulling anyone off production |
| Customer who asked for a quote and disappeared | Nobody remembers to follow up after a full week | The agent picks the conversation back up and the contact stays in the CRM with the history |
| Architect asking about installation lead time | The answer changes depending on who answered | Standard lead time always answered the same way, the way you defined it |
What does the WhatsApp agent do for stone and countertop shops?
It does the customer service that is yours today. You teach the business once in the Brain, CertuAI's knowledge base, and the agent answers clients your way, with your rules.
Qualifying the request
Room, approximate linear meters, type of stone and city, asked before it reaches you.
Price range by material
Granite, marble, quartz and porcelain: the range you define, without promising a final price.
Explaining finishes and cutouts
Edge, apron, backsplash and sculpted sink change the price, and the agent says so before the customer adds it up in their head.
Scheduling the measuring visit
Address, job site contact and time logged in the conversation, ready for the measurer's route.
Receiving photos and plans
Photo of the kitchen, floor plan or the cabinetmaker's drawing are saved alongside the contact.
What questions do clients send on WhatsApp?
They are always the same, and the agent answers each one on its own. These everyday messages at the stone shop no longer depend on you having your phone in hand.
How does the agent start answering at the stone shop?
In three steps, on the same day. No installation, no code and no changing the number clients already know.
Teach your business
In one conversation, you explain services, prices, hours and rules, as you would to a new employee.
How much does a WhatsApp AI agent cost for stone and countertop shops?
The Start plan costs US$ 75 per month and already includes the WhatsApp agent, your business's Brain, the CRM, automatic follow-up and the AI assistants, which come with every paid plan. Pro costs US$ 120 per month and adds the landing page, the wallet and 10 people on the team instead of 5. No lock-in contract and no setup fee.
What needs to be ready before turning on the agent at the stone shop?
The agent answers what is written, and nothing beyond that. Have these points defined before you connect WhatsApp.
- The list of stones the shop works with, with the price range per linear meter for each one
- What is included in the price: edge finish, sink cutout, apron, backsplash and installation
- The lead time between measurement, cutting and installation, and what changes when the stone is special-ordered
- The cities the measuring crew serves and the visit fee outside the radius
- What needs to be ready at the job site before measuring: cabinets installed, water point and level floor
Whether the agent schedules the measurement straight into the measurer's calendar or whether every visit goes through whoever builds the week's route.
The most common mistake: Letting the agent set a price from a measurement the customer estimated at home. A countertop is quoted by linear meter with the edge and cutouts defined, and a number given before measuring turns into a forced discount at delivery. Read how to fix this.
Frequently asked questions from stone and countertop shops
Does the agent set the countertop price on its own?
No, and it shouldn't. It gives the price range you define and explains that the final price comes after the on-site measurement, which is how stone shops work.
Does it receive photos and plans over WhatsApp?
Yes. The kitchen photo, written measurements and the project file are saved in the conversation, alongside the contact.
Does it work for serving architects and cabinetmakers, not just the owner of the job?
Yes. You set up a different path for partners, with their own lead time and terms, and each one becomes a separate contact in the CRM.
Does it answer which stone stains, scratches or needs resin?
It answers what you write about each material you work with, including care and maintenance. Recommending the right stone for each kitchen remains your conversation, in the shop or at the measurement.
In what other fields does the CertuAI agent work?
In any business that serves customers on WhatsApp, because the Brain is written by you. These fields have a day-to-day closest to yours.
Where can I read more about CertuAI's WhatsApp agent?
These pages explain the same agent from another angle: how it works, price, common questions and comparisons between platforms.
In short
A countertop can't be quoted off the cuff. The agent asks about the room, measurements and type of stone, gives the price range per meter, schedules the measuring visit and logs everything in the CRM.
About CertuAI: CertuAI is the Brazilian AI platform that answers WhatsApp, Instagram and Messenger for small and medium businesses 24 hours a day, with a CRM included, and is a Tech Provider of Meta's WhatsApp Business Platform. Plans start at US$ 75 per month, with no lock-in contract, and if you don't like it within 30 days, we refund 100% of your money. Create my agent