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WhatsApp chatbot for construction companies: how it works and how much it costs
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
Every day someone writes asking how much a square meter costs, without saying where the lot is or whether they already have plans. The agent explains how the company works, collects what the engineer needs and books the first conversation.
See the AI agent demos.
What is the best WhatsApp chatbot for construction companies in Brazil?
The best WhatsApp chatbot for construction companies in Brazil is the one that answers on the number the company already uses, with business rules written by you. An AI agent on WhatsApp for a construction company is an automatic assistant that answers which types of work the company does, which region it serves and how quotes work, collects the lot's location, floor area, whether plans exist and the desired timeline, books the technical visit and logs each request in the CRM for the sales team to follow.
Summary in 7 facts
- Every day someone writes asking how much a square meter costs, without saying where the lot is or whether they already have plans.
- The agent explains how the company works, collects what the engineer needs and books the first conversation.
- See the AI agent demos.
- The best WhatsApp chatbot for construction companies in Brazil is the one that answers on the number the company already uses, with 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 construction company 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 construction company with an AI agent?
What changes is who answers first: the message no longer waits for you and is answered instantly. Here are four everyday situations at the construction company before and after the CertuAI agent.
TodayDozens of messages asking the price per square meter, almost all without a lot
With CertuAIThe agent explains how the quote works and separates people who already have a lot and plans
TodayEngineer goes out to the lot and finds the job is too small for the company
With CertuAIType of work, floor area and city arrive in writing before any visit
TodayCustomer with work in progress and new prospect compete for attention on the same WhatsApp
With CertuAIEach one is identified in the first message and goes to the right person
TodayConstruction proposal sent and nobody follows up
With CertuAIThe proposal becomes a deal in the CRM and the contact gets automatic follow-up
What does a conversation handled by the AI look like?
Example conversation
Construction company's AI agent
Customer: I have the lot but no plans yet, do you do everything?
AI agent: About the plans: what you set up. Can you tell me the city and neighborhood of the lot and the floor area you have in mind?
Customer: How long does a one-story, three-bedroom house take?
AI agent: The timeline depends on the project: your timeline. Would you like to schedule the technical visit to the lot?
Is an AI agent or manual service better for construction companies?
The agent wins on repeating tasks, and the person keeps winning on what requires judgment. With manual service, someone at the construction company has to stop what they are 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 |
|---|---|---|
| Price-per-square-meter question | Someone throws out a number so as not to lose the contact, and the conversation dies there | The agent explains what the price depends on, using what you wrote, and collects the lot, floor area and finish level |
| Quote request without plans | The engineer finds out at the meeting that there are no drawings at all | The agent first asks whether an approved project already exists and records the answer on the contact |
| Work outside the service area | Uses up a visit before anyone notices the distance | The lot's city is the first question, and the region rule is the one you defined |
| Customer with work in progress asking for news | Writes to the same number as sales and waits for the engineer to leave the site | The agent identifies that they are a customer with work in progress, logs the question and passes it to the person in charge |
| Proposal sent with no reply | Sits there until someone remembers to call | Becomes a deal in the CRM, with automatic follow-up |
What does the WhatsApp agent do for construction companies?
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.
What the construction company builds
A house from scratch, an addition, a warehouse, commercial work or a major renovation: what is included and what is left out, as you set it up.
Quote request intake
City and neighborhood of the lot, intended floor area, finish level, timeline and whether plans already exist.
Contract type
Turnkey contract, construction management or labor only, explained in your own words.
Booking the site visit
Day and time agreed in the conversation, with the lot's address and the contact of the person who will receive the team.
Customers with work in progress
Schedule questions, requests for a site visit and warranty tickets logged and passed to the person in charge.
What questions do clients send on WhatsApp?
They are always the same, and the agent answers each one on its own. These everyday construction company messages no longer depend on you having your phone in your hand.
How does the agent start answering at the construction company?
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 an AI agent on WhatsApp cost for construction companies?
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.
Get started now
Create the agent, connect WhatsApp and see it working at the construction company.
Create my agentWhat needs to be ready before turning on the agent at the construction company?
The agent answers what is written, and nothing beyond that. Have these points defined before you connect WhatsApp.
- The types of work you do and the minimum size that is worth it for the company
- Cities and neighborhoods served and what to answer for a lot outside that region
- The contract types you offer and the difference between them in one sentence each
- What must come with a quote request: lot location, floor area, finish level, timeline and whether plans exist
- Who receives customers with work in progress and who receives warranty tickets
Whether the agent gives a price-per-square-meter range, with the caveats you write, or whether every number only comes out in the proposal.
The most common mistake: Setting up a single price per square meter without saying what it includes. The customer multiplies it by the floor area, arrives at the meeting with the math done, and every difference in foundation, lot and finish becomes a break in trust.
Frequently asked questions from construction companies
Does the agent give the project price over WhatsApp?
Only what you decide to set up. Many construction companies prefer that it explain what the price depends on and collect the lot, floor area and finish level, leaving the number for the proposal. It does not calculate a construction quote on its own.
Does it simulate financing or say whether the customer can get credit?
No. The agent answers whether the company works with financed construction and which documents you usually ask for, the way it is written in the Brain. Simulation and approval are up to the bank, and the conversation continues with your team.
Does it answer technical questions about foundations, structure or permits?
No, and that is on purpose. Technical and paperwork questions depend on the lot and the city hall. The agent logs the question and passes it to the engineer, without risking an answer that turns into a promise.
Does it work for customers whose project is already under way?
Yes. It recognizes that the person is a customer with work in progress, notes the question or the request for a site visit and alerts the person in charge. It does not look up the progress of each project; the team provides that.
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
Answers project types, service area and how quotes work, collects the lot and plans, and books the visit. Every request becomes a contact and a task 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