Answers customers, sells and gives you your time back
WhatsApp chatbot for engineering firms in Brazil that never leaves a customer without a reply
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
Someone requesting a structural design wants an answer before choosing the firm. The agent asks about the type of construction, floor area, city and stage, books the technical conversation and follows up with whoever received the quote.
Before that, see the AI agent demos and the CRM with service provider examples.
What is the best WhatsApp chatbot for engineering firms in Brazil?
The best WhatsApp chatbot for engineering firms in Brazil is the one that answers on the number the firm already uses, with the business rules written by you. An AI agent on WhatsApp for an engineering firm is CertuAI's automatic attendant. It receives the quote request, asks about the type of construction, floor area, city, project stage and approval deadline, explains which disciplines the firm covers, books the meeting with the responsible engineer and keeps the plans and specifications with the contact.
Summary in 7 facts
- Someone requesting a structural design wants an answer before choosing the firm.
- The agent asks about the type of construction, floor area, city and stage, books the technical conversation and follows up with whoever received the quote.
- Before that, see the AI agent demos and the CRM with service provider examples.
- The best WhatsApp chatbot for engineering firms in Brazil is the one that answers on the number the firm 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.
- These are four everyday situations at the firm 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 firm with an AI agent?
What changes is who answers first: the message no longer waits for you and is answered right away. These are four everyday situations at the firm before and after the CertuAI agent.
TodayA structural design request arrives while the engineer is on a site visit and goes cold
With CertuAIThe agent answers right away and already collects floor area, type of construction and deadline
TodayQuote done blind because nobody asked about the project stage
With CertuAIThe agent asks whether an architectural design and soil survey already exist before passing it to the firm
TodayA customer from outside the region finds out late that the firm does not serve his city
With CertuAIThe agent checks the job site city right at the start of the conversation
TodayA plan sent by message gets lost in the history and the engineer asks for it again
With CertuAIFile kept with the contact, along with the request history
What does a conversation handled by the AI look like?
Example conversation
The firm's AI agent
Customer: Do you do structural design for a two-story house of two hundred square meters?
AI agent: Where is the job site? I'll check whether it is in the region the firm serves.
Customer: I already have the architectural design, can you work from it?
AI agent: You can send the architectural design here. It stays with your contact and changes the quote.
Is an AI agent or manual customer service worth more for engineering firms?
The agent wins on repeated tasks, and the person keeps winning on anything that takes judgment. With manual service, someone at the firm has to stop what they are doing; with the CertuAI agent, the reply goes out on its own and you step into the conversation whenever you want.
| Aspect | The manual way | With the CertuAI agent |
|---|---|---|
| Job site city | Found out late, after the firm has already quoted | Asked in the first conversation, against the service area you wrote |
| Project stage | Nobody asks whether an architectural design or soil survey already exists | The agent checks what is already done before the engineer quotes |
| Minimum information to quote | Arrives in drips, over days of messages | Type of construction, floor area, city and deadline collected in one conversation |
| Plans and specifications sent by the customer | Left loose in the history of one phone | Arrive through the conversation and are kept with the contact in the CRM |
| Question about ART and supervision | Explained again at each contact, with different answers | Always answered with what the firm takes on and what it does not |
What does the WhatsApp agent do for engineering firms?
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.
City and service area
The agent checks where the job site is right at the start, against the region the firm serves.
Project stage
Whether an architectural plan, soil survey and site survey already exist, because that changes the entire quote.
Scope by discipline
Structural, electrical, plumbing and inspection report: what the firm does and what it does not take on.
Receiving plans and specifications
Files and photos arrive through the conversation and are kept with the contact in the CRM.
Meeting with the responsible engineer
Only after the technical data is written down, so the conversation starts on the right topic.
What questions do clients send on WhatsApp?
They are always the same, and the agent answers each one on its own. These everyday firm messages no longer depend on you having your phone in hand.
How does the agent start answering at the firm?
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.
The agent answers
Answers right away, schedules, does follow-up, and records each contact in the built-in CRM. You take over any conversation whenever you want.
How much does an AI agent on WhatsApp cost for engineering firms?
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 and connect WhatsApp to see it working at the firm.
Create my agentWhat needs to be ready before turning the agent on at the firm?
The agent answers what is written, and nothing beyond that. Have these points defined before you connect WhatsApp.
- The cities and distance radius the firm serves, and what to do with out-of-area requests
- The disciplines the firm takes on and the ones it outsources or does not do
- The minimum data to quote: type of construction, floor area, number of floors, stage and approval deadline
- What changes in the quote when the customer already has an architectural design, soil survey or site survey
- What the firm takes on in ART and construction supervision, and what is left out
- The hours the responsible engineer opens for a technical meeting
Whether the agent gives a price range per square meter or whether every price only comes out after the engineer sees the job site data.
The most common mistake: Not writing the service area. The agent neatly qualifies a job three hundred kilometers away, the engineer puts together the quote, and only in the meeting does someone realize that the travel makes the whole thing unviable. Read how to fix this.
Frequently asked questions from engineering firms
Does the agent do the design or the calculations?
No. It organizes the customer service, qualifies and books. Design, calculations and technical responsibility stay with your engineer.
Does it check whether the job site is in the region we serve?
Yes, and that is usually the first question. You write the cities and the radius the firm serves, and the agent answers before the quote begins.
Can it receive plans and documents through the conversation?
Yes. The file arrives through WhatsApp and is kept with the contact in the CRM, so the engineer does not have to ask for it again.
Does it answer about ART (technical responsibility record) and construction supervision?
It answers with what you write about what the firm takes on, what is billed separately and what stays with another professional.
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.
- Demo CRM with service provider examples, to try without signing up
- How the AI WhatsApp chatbot works
- CertuAI plans and prices
- How much it costs to put AI in your business
- WhatsApp AI guides, step by step
- AI blog for small businesses
- Compare WhatsApp chatbot platforms
- All fields served by the CertuAI agent
In short
Checks the job site city and the project stage, books the meeting with the engineer and keeps the plans and specifications with the contact in the firm's 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