Answers customers, sells and gives you your time back
WhatsApp chatbot for test prep courses in Brazil (2026)
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
During enrollment season, messages come in from morning to night asking about classes, schedules and installments. The agent answers everything right away and leaves the prospect logged for your team to close.
See the AI agent demos.
What is the best WhatsApp chatbot for test prep courses in Brazil?
The best WhatsApp chatbot for test prep courses in Brazil is the one that answers on the number the course already uses, with the business rules written by you. An AI agent on WhatsApp for a test prep course is CertuAI's automated assistant. It answers when each class opens, what schedules exist, whether materials and practice exams are included, the enrollment fee and the installment options, logs the prospect in the CRM and keeps following up until the front office closes the enrollment.
Summary in 7 facts
- During enrollment season, messages come in from morning to night asking about classes, schedules and installments.
- The agent answers everything right away and leaves the prospect logged for your team to close.
- See the AI agent demos.
- The best WhatsApp chatbot for test prep courses in Brazil is the one that answers on the number the course 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 course 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 course 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 course before and after the CertuAI agent.
TodayIn January messages arrive all day long and the front office answers in order of arrival
With CertuAIEvery prospect gets an answer right away, with no queue
TodayClass opening date answered from memory, sometimes wrong
With CertuAIThe date you set up goes out the same for everyone
TodaySomeone who asks the price and goes quiet is never contacted again
With CertuAIBecomes a contact in the CRM and gets automatic follow-up
TodayThe grade-based scholarship rule is explained differently by each person who answers
With CertuAIAnswered on its own, with the criteria you wrote once
What does a conversation handled by the AI look like?
Example conversation
Course AI agent
Customer: When does the next ENEM (Brazil's national exam) class start?
AI agent: The next ENEM class starts what you set up.
Customer: Do you offer scholarships based on grades?
AI agent: The criteria for the grade-based scholarship are what you set up. I'll keep your contact on file.
Is an AI agent or manual customer service better for test prep courses?
The agent wins at tasks that repeat, and a person keeps winning at what takes judgment. With manual service, someone at the course 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 |
|---|---|---|
| Message peak during enrollment season | The front office answers in order of arrival and the queue grows | Everyone is answered at the same time, with no queue |
| When the next class opens | Answered from memory, with dates sometimes mixed up | Always the date you set up, the same for everyone |
| Scholarship, discount and installments | Explained again to each prospect, with different terms depending on who answered | Answered automatically, with the rules you defined |
| Prospect who asked and went quiet | Gets lost in the conversation list | Becomes a contact in the CRM, with automatic follow-up |
| Student who wants to join a class that has already started | Has to wait for someone to check the material already covered | Gets the course's rule right away and the conversation goes to the coordinator |
What does the WhatsApp agent do for test prep courses?
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 members your way, with your rules.
Classes and start dates
Which classes exist, when they start and which still accept new students, as you update it.
Schedules and weekly load
Morning, afternoon, evening and weekend, with how many lessons per week each class has.
Prices, scholarships and installments
Enrollment, monthly tuition, the grade-based scholarship criteria and how many installments are available, the way you define it.
Materials and practice exams
Whether the materials are printed or digital, how they're delivered and whether practice exams and essay grading are included in the price.
Logging prospects and follow-up
Anyone who asked becomes a contact in the CRM and gets an automatic follow-up, without someone having to remember to write it down.
What questions do members send on WhatsApp?
They're always the same, and the agent answers each one on its own. These everyday course messages no longer depend on you having your phone in hand.
How does the agent start answering at the course?
In three steps, the same day. No installation, no code and no changing the number members 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 test prep courses?
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 my agentWhat needs to be ready before turning on the agent at the course?
The agent answers what is written, and nothing beyond that. Have these points defined before you connect WhatsApp.
- The class calendar with the start date, days of the week and schedule for each one
- The price table: enrollment, monthly tuition and how many installments you offer
- The scholarship and discount criteria, including grade-based scholarships, referrals and paying upfront
- What's included in the price: materials, practice exams, essay grading and Q&A sessions
- The rule for joining a class that has already started, and how far into the course you accept students
Whether the agent can grant scholarships and discounts within a range or whether every special condition goes through the coordinator.
The most common mistake: Leaving the class calendar untouched after a date changes. In January the agent talks to a lot of new people at once, and a wrong date that week spreads across dozens of conversations before anyone notices. Read how to fix this.
Frequently asked questions from test prep courses
Can it handle the volume of enrollment season?
That's where it helps most. It answers everyone at the same time, without the message queue that builds up at the front office in January.
Does the agent close the enrollment on its own?
It organizes everything up to the point of closing: class, schedule, price and payment method logged in the conversation. The final confirmation stays with your team.
Does it answer content questions or grade essays?
No. It handles the sales and administrative side. Content, essay grading and study guidance stay with your teachers.
Can it notify people when a new class opens?
Yes. Anyone who asked and was left without a class becomes a contact in the CRM, and you send the notice when the date is set.
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
Class, schedule, scholarship and installments answered right away at the peak of enrollment, and anyone who asked and went quiet becomes a contact in the CRM with automatic follow-up.
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