AI Customer Service Automation: Complete 2026 Checklist
Before you sign, check what the AI answers on its own, what needs a human, the real price per message, and whether you can leave without a penalty. Skipping this is expensive: a company signs, finds out the system's limit later, and ends up stuck in a bad contract.
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
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
- Before you sign, check what the AI answers on its own, what needs a human, the real price per message, and whether you can leave without a penalty.
- Skipping this is expensive: a company signs, finds out the system's limit later, and ends up stuck in a bad contract.
- Want to see this working on your business's WhatsApp?
- AI customer service automation looks the same in every ad: it answers fast, never sleeps, serves everyone.
- In practice, every system has a different limit, and that limit only shows up after a real customer sends a strange question.
- Does the AI connect to your scheduling, inventory or customer records system, or does it only answer on WhatsApp?
- Does it actually book a time, or does it just send the customer a phone number to call?
By the numbers
| Number | What it means |
|---|---|
| US$ 75 per month | The Start plan costs US$ 75 per month, answers up to 1,600 messages and includes 5 team members. |
Why does this matter so much when hiring?
AI customer service automation looks the same in every ad: it answers fast, never sleeps, serves everyone. In practice, every system has a different limit, and that limit only shows up after a real customer sends a strange question.
People who skip the checklist usually find the problem at the worst moment: a customer asking something the AI does not know how to answer, and nobody noticing until they complain.
The most expensive mistake is not choosing the wrong AI. It is signing without knowing what it does not do, and only finding out after months of paying.
Complete checklist of what to check
- Does the AI connect to your scheduling, inventory or customer records system, or does it only answer on WhatsApp?
- Does it actually book a time, or does it just send the customer a phone number to call?
- How many messages per month does the plan cover, and what happens when you go over?
- Does it get back in touch with people who went quiet in the middle of a conversation, or is that up to you?
- How many people on your team can use the system at the same time?
- Is there a minimum contract term, or can you cancel whenever you want?
- Is there a setup fee charged separately from the monthly price?
- Does the WhatsApp number you already use stay yours, or is it locked into the system?
How do you test before signing?
Test 1: a question outside the script
Send a question a real customer would ask, but that is not obvious: a specific deadline, a rare condition, a product you do not sell. See whether the AI makes up an answer or admits it does not know.
Test 2: a customer who disappears and comes back
Stop replying in the middle of the test conversation. See whether the system reaches out again on its own, after how long, and how many times.
Test 3: two requests at once
Send two messages in a row about different topics, the way an anxious customer would. See whether the AI mixes up the answers or addresses each point.
What needs to be in the contract?
The contract needs to make clear what is included in the price, not just the monthly amount. Check these points before you sign:
- How many messages the AI answers per month, and the price of each extra message
- Whether there is a minimum contract term or a penalty for leaving
- Whether there is a fee charged just to put the system live
- How many people on your team are included in the plan
- What happens to the conversations and contacts if you cancel
If any of these points is not in writing, ask before you sign. Afterward it is harder to argue.
To see what the AI would cost in your business, see how much it costs to put AI in place.
How do you put it live step by step?
Step 1: connect the number you already use
You do not need to change numbers. You connect the WhatsApp your customers already know to the system you choose.
Step 2: teach it what it can answer
Enter prices, hours, payment methods and the most common questions in your business. This is what it will use to talk to customers.
Step 3: define what it never answers on its own
Clearly mark what has to go to a human: serious complaints, price negotiations outside the price list, legal cases.
Step 4: follow the first week closely
Read the conversations from the first few days. That is where you find the question the AI could not answer, and you adjust.
What are the most common scams and traps?
The most common trap is not outright theft, it is fine print. Some points that catch business owners off guard:
- Annual plan with a discount, but no option to leave before the contract ends
- Low advertised price, but extra messages charged separately and without notice
- A demo done only with easy questions, hiding what the system does not do
- Setup fee charged after you have already decided, as if it were a detail
- A promise of a 'free trial' with a tight deadline, designed so you sign without comparing properly
How CertuAI can help
CertuAI's Start plan costs US$ 75 per month, answers up to 1,600 messages and includes 5 team members. There is no minimum contract term and no setup fee, and you connect the WhatsApp number you already use.
Read also
- complete checklist for hiring an AI customer service tool
- what the AI agent can never answer
- is an annual AI contract worth it
Frequently asked questions
- Do I need to change my WhatsApp number to use an AI customer service tool?
- No. The system connects to the number your business already uses, and customers keep talking to the same contact.
- Does the AI completely replace the people who answer customers today?
- Not necessarily. It takes over the repeated questions, but cases like a special negotiation or a serious complaint usually go to a human.
- What happens if I go over the plan's message limit?
- It depends on the system: some charge for extra messages, others stop answering until the month rolls over or until you change plans. Check this before you subscribe.
- Is it worth signing an annual contract to pay less?
- Only if you have already tested the system and are sure it fits your business, because leaving before the term ends usually comes with a penalty.
Keep reading
In short
Before you sign, check what the AI answers on its own, what needs a human, the real price per message, and whether you can leave without a penalty. Skipping this is expensive: a company signs, finds out the system's limit later, and ends up stuck in a bad contract.
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
