Auto Parts Customer Service on WhatsApp in Brazil 2026: Complete Comparison of the Most Used Options
The best approach depends on the volume of messages per day. A store with few orders can stay manual, while a store with constant traffic saves time with an AI agent that already knows the price and asks for the model and year before answering.
Sources: Mobile Time/Opinion Box 2026 Panorama: chatbots in Brazil · General Data Protection Law (Law 13.709/2018)
What CertuAI measured on WhatsApp at repair shops and auto parts stores
At the 4 repair shops and auto parts stores that answer with CertuAI's AI, 21.9% of the 7,828 customer messages arrived outside Monday to Friday, 8 am to 6 pm (July 30 to September 30, 2026). Half of the AI's replies went out within 15.2 seconds, and 9 in 10 within 23.9 seconds (1,949 replies). 27.8% of conversations started outside business hours, and the busiest hour for messages was 3 pm.
| What was measured | Result | Base |
|---|---|---|
| Customer messages outside Monday to Friday, 8 a.m. to 6 p.m. | 21,9% | 7,828 customer messages from 4 repair shops and auto parts stores |
| Weekend messages | 10% | 7,828 customer messages from 4 repair shops and auto parts stores |
| Conversations that start outside business hours | 27,8% | 1,211 conversations |
| Time until the AI replies (half of the replies) | within 15.2 seconds | 1,949 AI replies |
| Time until the AI replies (9 in 10 replies) | within 23.9 seconds | 1,949 AI replies |
| Hour of the day with the most customer messages | 15h | 7,828 customer messages from 4 repair shops and auto parts stores |
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 |
|---|---|---|---|---|---|---|
| Nikiti Auto Center auto center | 4.912 | 3.548 | 900 | 19,5% | 14,4 s | 47 |
| 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 |
| 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
Bernardo Villela · CEO, CertuAI
Want to see this working on your business's WhatsApp? Build your agent, no sign-up needed.
Summary in 7 facts
- The best approach depends on the volume of messages per day.
- A store with few orders can stay manual, while a store with constant traffic saves time with an AI agent that already knows the price and asks for the model and year before answering.
- Sources: Mobile Time/Opinion Box 2026 Panorama: chatbots in Brazil · General Data Protection Law (Law 13.709/2018) Want to see this working on your business's WhatsApp?
- A large share of part sales today starts with a photo or a part number sent over WhatsApp, before the customer ever goes to the store.
- Whoever replies fast with price and availability usually closes the sale first, even when the price is similar to the competitor's.
- In practice, the AI agent answers well what you have entered: price, code, part brand.
- Chat with an AI agent in the simulator and see how it answers on WhatsApp.
By the numbers
| Number | What it means |
|---|---|
| US$ 75 per month | For the AI agent, CertuAI charges a flat monthly fee: the Start plan costs US$ 75 per month and answers up to 1,600 messages a month, with 5 team members having access. |
| R$ 599 | The Pro and Max plans cost US$ 120 and US$ 249 per month, for those with more volume. |
| 2 times | The customer notebook fills itself in: each conversation becomes a contact, a deal and a task, and anyone who goes quiet gets an automatic follow-up up to 2 times, every 24 hours. |
What does the auto parts market in Brazil look like in 2026?
A large share of part sales today starts with a photo or a part number sent over WhatsApp, before the customer ever goes to the store. Whoever replies fast with price and availability usually closes the sale first, even when the price is similar to the competitor's.
This changed the counter clerk's role: besides selling at the counter, they also have to answer messages all day, including outside the hours the store is open. That is where the options in this comparison come in.
What are the most used options in 2026?
| Option | How it works | Limit that weighs on the decision |
|---|---|---|
| Manual service by the owner or counter clerk | The person reads and answers each message when they have time | Stops outside opening hours and disappears when the store fills up with in-person customers |
| Fixed-menu chatbot | The customer picks an option number, without writing in their own words | Does not understand a photo of the part or a loose question like "will it fit my car?" |
| AI agent, like CertuAI's Start | Understands free-form messages, asks for the model and year, checks what you have entered | Does not connect to the inventory system on its own and does not close the sale without someone confirming |
| Outsourced call center | An outside team answers on the store's behalf, charging per agent or by volume | The people answering do not know the part like someone who has worked the counter for years |
What is promised and what really happens?
The common promise is "it answers just like a person". In practice, the AI agent answers well what you have entered: price, code, part brand. What you have not entered, it does not make up on its own if it is set up properly.
Part compatibility is the most delicate point. The same car model can have engine variations by year or trim, and the agent only gets it right if it has that information in what was entered for it.
What does the store need to have ready beforehand?
- A parts list with prices and codes, not just the generic name
- A clear rule on who approves a discount and up to how much
- What the agent should answer when it is not sure about the part
- The WhatsApp number the store already uses, ready to connect
Want to see how it works in practice? Chat with an AI agent in the simulator and see how it answers on WhatsApp.
How much does each option cost to run?
Manual service has no monthly fee, but it eats up the hours of whoever answers, and that time has a cost even though there is no invoice for it. An outsourced call center usually charges per agent or per volume of messages handled, varying from company to company.
For the AI agent, CertuAI charges a flat monthly fee: the Start plan costs US$ 75 per month and answers up to 1,600 messages a month, with 5 team members having access. The Pro and Max plans cost US$ 120 and US$ 249 per month, for those with more volume.
Which rules apply in 2026?
WhatsApp requires the business number to be verified to use customer service features at scale, and Meta can limit numbers that send mass messages to customers who have not contacted them first.
Brazil's LGPD data protection law comes into play when the store keeps a customer's license plate, phone number and purchase history: you need a clear reason to keep that data and must delete it when the customer asks.
Who should choose each option in 2026?
A small store with few messages a day and an owner who can keep up with replying does fine manually. There is no need to change if the volume does not bother you.
A store with a constant flow of orders outside opening hours, or with more than one counter clerk losing time repeating prices, gains from an AI agent. A chain with many locations and hard-to-resolve service usually needs an outsourced call center or a larger system of its own.
How CertuAI can help
CertuAI connects to the WhatsApp number the store already uses, with no setup fee and no minimum contract term. The customer notebook fills itself in: each conversation becomes a contact, a deal and a task, and anyone who goes quiet gets an automatic follow-up up to 2 times, every 24 hours.
Read also
- AI agent for an auto repair shop
- AI for auto repair shops and part quotes
- what the AI agent can never answer
Frequently asked questions
- Does the AI agent know whether a part fits the customer's car?
- Only if that compatibility information has been entered. Without it, the agent should not make anything up and needs to hand off to someone to confirm.
- Can the agent check the store's inventory on its own?
- Not on its own: it answers based on what has been entered, and it does not connect to the store's inventory system.
- Does a fixed-menu chatbot solve the same problem as an AI agent?
- No. A fixed menu only understands a numbered option, while the AI agent reads the message the way the customer writes it.
- Is it worth switching from manual to an AI agent in a small store?
- Only if the message volume is already beyond what the person answering today can handle, including outside opening hours.
Keep reading
In short
The best approach depends on the volume of messages per day. A store with few orders can stay manual, while a store with constant traffic saves time with an AI agent that already knows the price and asks for the model and year before answering. Sources: Mobile Time/Opinion Box 2026 Panorama: chatbots in Brazil · General Data Protection Law (Law 13.709/2018)
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
