ThinnestAI is now an Official Meta Tech Provider
Official Meta Tech Provider

Complete WhatsApp
Business API Platform

Get the official WhatsApp Business API free — no setup fee, no monthly fee on Pay As You Go. Direct on Meta’s Cloud API, with an agent that answers in 22 Indian languages.

Connect your numberSee pricing
A business owner answering customers on WhatsApp

Everything the thinnest WhatsApp Automation Platform can do

One number, your whole team, and an agent that keeps answering after everyone goes home.

Upload your list. Broadcast in minutes.

Import contacts, tag them, and schedule the send. Consent is tracked three ways — including the agent simply asking — and anyone who opts out is dropped from the next send automatically. You get a reason for every number that failed, not one number for the whole campaign.

ContactsSend broadcast
NumberNameConsent

One inbox your whole team works in.

Every chat lands in a shared inbox on your team's laptops. Assign a conversation, leave a private note, save the replies you send twice a day. When the agent can't answer, it hands the chat over and stays quiet.

ASAarav SharmaIs the blue one in stock?
PNPriya NairThanks, that worked!
RDRohit DesaiWhen does it ship?
MIMeera IyerCan I change the size?
KSKabir ShahGot it, thank you.
AMAnanya MenonDo you ship to Kochi?
Aarav SharmaPriya

An agent that answers at 2 AM.

A real agent working from your prices, your policies and this customer's history — not a keyword tree that gives up on the second question.

Agent · online2:14 AM

Collect details inside the chat.

Ask for a name, a pincode or a size in WhatsApp itself. No link out to a form your customer has to open in a browser and abandon.

Delivery details
Full name
Pincode
Landmark
Submit
Answers save straight to the customer’s record.

Templates, without Business Manager.

Write it, submit it, watch the approval — in one place. We warn you when a template's quality slips, and stop sends before Meta stops them for you.

TemplatesNew
order_shippedApproved
diwali_offer_v2
cart_reminderApproved
cod_confirmApproved
Quality dropped to medium on diwali_offer_v2. Sends paused before Meta pauses them.

More features

Smarter WhatsApp marketing, made simple

The small things that decide whether a campaign lands or gets your number blocked — handled for you, not left as your problem.

Carousel templates

Up to ten cards in a single message — one send, one charge, instead of one message per product.

Buttons and lists

Customers tap an answer instead of typing one. Reply buttons and list messages, inside templates and out.

Coupons and offers

Limited-time offer templates with a copy-the-code button, so the discount lands in the chat itself.

Consent, tracked three ways

A checkbox on import, an opt-in message, or the agent simply asking. Every send knows which one it has.

Opt-outs honoured for you

We read Meta's own opt-out signal and drop that number from the next send. Ignoring it is how numbers get blocked.

Sends stop on a restriction

If Meta restricts the account, sending halts and resumes by itself when the restriction expires. Most platforms keep sending into it.

A reason for every failure

Per recipient, not one number for the whole campaign. You see which numbers failed and exactly why.

Scheduling that runs without us

Pick the time and close the laptop. Scheduled sends do not depend on your browser, or on our dashboard being open.

Media, delivered and read

Images, documents and voice notes both ways, with delivery and read receipts recorded per recipient.

Which ad started the chat

Click-to-WhatsApp attribution shown on the conversation in your inbox. Most platforms sell this as a reporting add-on.

Follow up by what happened

Build the next send from the last one: everyone who did not reply, who replied, or who was never reached.

Your systems can send too

One POST for an order update from your backend, or let an event like order.delivered start the follow-up itself.

Compare the alternatives

What you are actually choosing between when you go looking for the WhatsApp Business API.

ComparethinnestAiSensy
GeneralOne agent on WhatsApp, on the phone and in your helpdesk — sharing one memory of each customer.A WhatsApp marketing and support platform, sold on unlimited users.
SetupConnect your number through Meta's Embedded Signup. Twenty-six templates are already written, buttons included.Official Business API onboarding, and an Indian virtual number if you need one.
AutomationAn agent that answers from your prices, your policies and this customer's history — included, not an add-on — and hands over to a person when it should.The AI Agent Builder is a paid add-on at ₹1,350 a month, which includes 1,000 AI messages; the drag-and-drop chatbot builder is ₹2,500 a month for five bots.
ChannelsWhatsApp, voice calls, and tickets in Salesforce or Zendesk. One customer, one thread.WhatsApp.
PricingPay As You Go with no monthly minimum. Voice is ₹2 a minute in 30-second pulses; WhatsApp calls ₹2.5 a minute.An unlimited-users plan, then each automation capability priced as its own add-on.
SupportThe people who built it will set it up with you.Not broken out by plan on their pricing page.

Competitor details from each company’s own pricing page, read 7 September 2026. Plans change — check theirs before you decide.

Live in three steps

Most routes to the API go through a reseller, a sales call and a week of paperwork. This is Meta’s own signup flow, and we are approved to run it.

  1. 01

    Sign in with Facebook

    A Meta window opens and you approve the connection. No forms to fill, no sales call to sit through, no waiting on anyone to get back to you.

  2. 02

    Pick your number

    Use a new number, or one you already own — as long as it is not signed in to the WhatsApp app right now. Then set the name your customers will see.

  3. 03

    Start sending

    Templates, broadcasts and the API work straight away. The green tick is a separate Meta review on their clock, and your number sends fine without it.

What businesses actually use it for

Not a list of features. The six jobs customers set up first.

Confirm COD orders before you ship

Ask the buyer to confirm on WhatsApp minutes after they order, in their language. If they do not reply, the number is already in a calling list for a follow-up call.

Answer support without hiring for it

The agent replies from your help pages and price list, 24 hours a day, in Hindi, Tamil, Marathi and 19 more. It hands over the moment someone is upset.

Qualify leads while they are still interested

Reply to a new enquiry in seconds. Ask the two or three questions your sales team always asks, and write the answers into your CRM before anyone picks up the phone.

Send reminders people actually see

Fee reminders, policy renewals, appointment times, delivery updates. Sent one person at a time from your own system, not blasted to a list.

Follow up by phone when chat goes quiet

Contacts who never replied on WhatsApp can be moved into a calling campaign. The agent that rings them already knows what the chat was about.

Book the appointment inside the chat

The agent checks your calendar, offers real slots, books one and confirms — all in the same WhatsApp thread the customer started in.

It plugs into what you already run

Shopify

Catalogue, cart and checkout, plus order status and tracking.

Zendesk

Tickets read into the conversation and written back.

Salesforce

Cases and contact history the agent can see.

Webhooks

Signed events for leads, escalations and finished calls.

Your backend

A REST API for messages and an events endpoint for triggers.

1,400+ more

A directory of tool connections the agent can call.

Built for Indian businesses

22 Indian languages, one setup

Hindi, Tamil, Marathi, Bangla and the rest, in their own script — and Hinglish, because that is how people really type. You write your knowledge once.

DPDPA and TRAI built in

Consent is recorded, data is deleted when you say so, and DND numbers are scrubbed. Calls only go out between 9am and 9pm.

The same agent answers your phone

₹2 a minute on a phone line, billed in 30-second pulses. WhatsApp calls are ₹2.5 a minute, billed per minute, because that is how Meta charges for them.

Your data stays in Mumbai

Everything runs in Google Cloud's Mumbai region. Payment data follows RBI localisation through Razorpay. Call recordings are kept 89 days.

Before you connect a number

Questions people actually ask

It is the way Meta lets software talk to WhatsApp. There is no app to install. You connect a phone number to a platform like this one, and from then on you work in a console and, if you want, through code. It exists for businesses that get more messages than one person can answer, or that want messages sent automatically from their own systems.

The free app is one phone, one person, and you can only reply to people who wrote to you first. The API removes all three limits. If one person can comfortably keep up with your WhatsApp, stay on the free app — it is genuinely good, and you do not need this.

Minutes. We are an approved Meta Tech Provider, so you sign in through Meta's own window, pick your number, and templates and the API are switched on. The green tick is a separate Meta review with its own timetable, and your number works without it.

Get your number connected today

Signing up takes minutes. If you would rather someone did it with you, an engineer will — your knowledge, your templates, your escalation rules, handed over working.

Start freehello@thinnest.ai

Want the AI side of it? See what a WhatsApp AI agent can do.