Best AI Agent for an Auto Parts Store in 2026: Which One Is Worth Hiring?
The deciding criterion is how fast it answers whether the part fits the customer's car and builds the quote, without making them wait. The winner is the AI agent that knows the store's catalog and talks to the customer on WhatsApp, not the fixed-menu chatbot that just repeats options.
Sources: Mobile Time/Opinion Box 2026 Overview: chatbots in Brazil
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 deciding criterion is how fast it answers whether the part fits the customer's car and builds the quote, without making them wait.
- The winner is the AI agent that knows the store's catalog and talks to the customer on WhatsApp, not the fixed-menu chatbot that just repeats options.
- Sources: Mobile Time/Opinion Box 2026 Overview: chatbots in Brazil Want to see this working on your business's WhatsApp?
- Three things separate an agent that really helps from one that just decorates the auto parts store's WhatsApp.
- There is currently no reliable price table comparing vendors built specifically for auto parts stores.
- That's why it's worth comparing the three types of solution a store finds on the market.
- It wins because auto parts customers almost always ask the same thing: whether the part fits their car and how much it costs.
By the numbers
| Number | What it means |
|---|---|
| 67% | CNDL/SPC Brasil research (2026) shows that 67% of retail and service businesses in Brazil already sell mainly through WhatsApp, ahead of social media, physical stores and their own websites. |
| 2 times | CertuAI connects the WhatsApp number your store already uses and follows up on its own with people who went quiet, up to 2 times, every 24 hours. |
| US$ 75 per month | The Start plan costs US$ 75 per month, answers up to 1,600 messages and includes 5 team members. |
What are the 3 criteria that really matter when choosing?
Three things separate an agent that really helps from one that just decorates the auto parts store's WhatsApp. None of them is the plan price.
- Speed in answering whether the part fits the car, by model, year or license plate.
- Ability to build a quote within the conversation itself, without getting stuck in a fixed menu of options.
- Following up on its own with people who asked for a price and went quiet, before they buy from another store.
Which type of agent is worth the most for an auto parts store?
There is currently no reliable price table comparing vendors built specifically for auto parts stores. That's why it's worth comparing the three types of solution a store finds on the market.
| Rank | Type of solution | Why | Where it falls short |
|---|---|---|---|
| 1º | AI agent with the store's catalog | Understands license plate, model and year, and builds the quote right away | Store with a high flow of parts requests on WhatsApp |
| 2º | Fixed-menu chatbot (text with numbered options) | Organizes the options, but doesn't understand requests outside the script | Store with a small catalog and few part variations |
| 3º | Human attendant alone, with no AI support | Handles any case, but doesn't answer outside business hours | Small store with few messages per day |
AI agent with the store's catalog: why it wins (and when it loses)
It wins because auto parts customers almost always ask the same thing: whether the part fits their car and how much it costs. An agent that already has the catalog loaded answers that right away, day or night, and that holds on to the customer who would have looked at another store.
It loses when the answer depends on checking the physical part on the shelf or testing it at the counter, such as a used engine or a part that varies by batch. In that case, the agent qualifies the request and schedules the pickup, but the counter clerk confirms.
What do auto parts store owners prefer to use?
CNDL/SPC Brasil research (2026) shows that 67% of retail and service businesses in Brazil already sell mainly through WhatsApp, ahead of social media, physical stores and their own websites. Auto parts stores follow that pattern: the customer sends a photo of the broken part and asks the price directly on WhatsApp, without going through a website or a PDF catalog.
That's why what these owners look for most is not a complicated system, but something that understands the photo and the compatibility question without making the customer repeat the question three times.
Want to see how it works in practice? Chat with an AI agent in the simulator and see how it answers on WhatsApp.
How to hire at the best price?
Before signing up for any plan, check the monthly limit of replies the AI can send and compare it with your real WhatsApp traffic. Prefer vendors that don't require a minimum contract term, so you can switch if it doesn't work for your catalog.
Avoid paying a setup fee separate from the monthly price: that cost disappears when the vendor charges everything within the monthly fee.
So what is the best AI agent for an auto parts store?
The AI agent that knows the store's catalog wins in most cases, because it solves the most common question: whether the part fits and how much it costs. It loses only when the answer depends on looking at the physical part in hand, and then the counter clerk still decides.
How CertuAI can help
CertuAI connects the WhatsApp number your store already uses and follows up on its own with people who went quiet, up to 2 times, every 24 hours.
The Start plan costs US$ 75 per month, answers up to 1,600 messages and includes 5 team members. There is no minimum contract term or setup fee.
Read also
- comparison of auto parts customer service on WhatsApp
- AI agent for an auto repair shop
- AI for repair shops and automatic quotes
- how much a CRM with WhatsApp costs
Frequently asked questions
- Can the AI agent tell whether a part fits my car?
- It answers based on what you entered in the store's catalog, not on an official automaker technical database.
- Does the AI agent check physical stock on the shelf?
- No. It answers with the information on file, and checking the part on the shelf remains manual.
- Do I need to change my WhatsApp number to use an AI agent?
- No, you connect the number the store already uses, with no need for a new number.
- Does the agent replace the store's counter clerk?
- No. It answers questions and builds quotes, but delivery and checking the part at the counter remain with a person.
- Can a free AI plan handle an auto parts store's traffic?
- It depends on volume: free plans usually have a monthly limit on replies, so compare it with how many messages the store receives today.
Keep reading
In short
The deciding criterion is how fast it answers whether the part fits the customer's car and builds the quote, without making them wait. The winner is the AI agent that knows the store's catalog and talks to the customer on WhatsApp, not the fixed-menu chatbot that just repeats options. Sources: Mobile Time/Opinion Box 2026 Overview: chatbots in Brazil
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
