Is an AI free plan worth it for a real test?
A free trial is well worth it, as long as it is the right type. What is not worth it is a trial that asks for a card to start, or one that expires in days while you have not configured anything yet. A good trial is one that lets you do one thing: enter your prices and ask the way your customer asks.
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
- A free trial is well worth it, as long as it is the right type.
- What is not worth it is a trial that asks for a card to start, or one that expires in days while you have not configured anything yet.
- A good trial is one that lets you do one thing: enter your prices and ask the way your customer asks.
- Want to see this working on your business's WhatsApp?
- The clock is the detail that ruins trials the most.
- You sign up on a Tuesday, hit a busy week, and by Sunday the trial is over without you having entered a single price.
- Most demos show an AI answering about a sample store.
By the numbers
| Number | What it means |
|---|---|
| US$ 75 per month | Plans start at US$ 75 per month. |
The four types of free trial
| Type | How it works | The problem |
|---|---|---|
| Time-limited, card required | 7 or 14 days, card up front | The clock keeps running even in your busiest week |
| Time-limited, no card | A few free days | Same clock problem, without the risk of being charged |
| Usage-based, no card | A number of messages or actions | None, if the amount is enough to test with |
| Permanent free plan | Limited forever | Often hides the feature that decides the purchase |
The clock is the detail that ruins trials the most. You sign up on a Tuesday, hit a busy week, and by Sunday the trial is over without you having entered a single price.
At CertuAI, building the agent and talking to it before you connect is open, at your own pace, and you only pay when you choose a plan.
What a good trial needs to let you do
Most demos show an AI answering about a sample store. That looks nice and proves nothing about you. The test that decides has four steps:
- Enter three prices from your business, with the names you use.
- Ask for a price in a clumsy way, the way customers really ask.
- Ask something you did not enter, and see whether it makes something up or calls a person.
- Ask it to book an appointment and see whether that shows up somewhere afterward.
If the free trial does not let you do all four, it is not a trial. It is a demo with a controlled script, and you will find out what matters after you pay.
Step 3 is the one that fails the most tools. An AI that invents a price in the trial will invent a price with your customer.
Want to see how it works in practice? Chat with an AI agent in the simulator and see how it answers on WhatsApp.
Card up front: when it is a warning sign
Asking for a card for a free trial is not a scam and is common practice. But it changes the nature of what is being offered: it stops being "try it" and becomes "subscribe and cancel if you do not like it". The difference shows up on the day you forget to cancel.
- If it asks for a card, note the cancellation date on your calendar the same day you sign up.
- Ask whether you cancel on your own on the screen or whether it depends on talking to someone.
- Be wary of a trial with a card and cancellation only by phone.
A trial without a card solves this at the root, which is why it is the most honest format for someone comparing three vendors at the same time.
Is a permanent free plan worth it?
It is worth it when the limit is on volume, not on features. A free plan that lets you use everything at low volume lets you find out whether the tool fits. A free plan that removes exactly the feature that decides the purchase is not generosity, it is a shop window.
The question that separates them: is what is outside the free plan volume, or the feature I came for? If it is the feature, the free plan will teach you nothing about the decision.
Better a short trial with everything unlocked than an eternal free plan without the part that matters.
Read also
- is an AI agent on WhatsApp worth it
- can you trust an AI agent
- false urgency in software sales
- the real price of AI platforms
Frequently asked questions
- Is it worth using the free plan of an AI platform?
- It is worth it when the limit is on volume, not on features, because then you can test exactly what you will buy. It is not worth it when the free plan removes precisely the feature that decides the purchase, because then you test something else and decide in the dark.
- Is a free trial that asks for a card trustworthy?
- It is usually legitimate, but it changes the nature of the trial: you are subscribing with an option to cancel, not experimenting. If you accept, mark the cancellation date on your calendar the same day, and first confirm that you can cancel on your own on the screen.
- How much time do I need to test a customer service AI?
- Less than it seems, if the trial is based on usage rather than time. Entering three prices and asking four questions takes fifteen minutes, and that already answers the two things that matter: whether it understands your way of doing things and whether it makes things up when it does not know.
- How does testing CertuAI work?
- You build the agent with your business's information and talk to it as if you were a customer, at your own pace. You only pay when you choose a plan. Plans start at US$ 75 per month.
Keep reading
In short
A free trial is well worth it, as long as it is the right type. What is not worth it is a trial that asks for a card to start, or one that expires in days while you have not configured anything yet. A good trial is one that lets you do one thing: enter your prices and ask the way your customer asks.
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
