Click-to-WhatsApp ads have become the default lead ad for Indian businesses, and for good reason: a tap on Instagram or Facebook opens a WhatsApp chat, and a chat converts better than a form nobody wanted to fill in.
The ad is the easy part. Most of the money is lost in what happens after the tap — the reply that comes three hours later, the conversation nobody followed up, and a free 72-hour window most teams do not know they have.
How a click-to-WhatsApp ad works
- You run an ad on Facebook or Instagram with WhatsApp as the destination.
- Someone taps it, and WhatsApp opens a chat with your business number, with a message you pre-filled ready to send.
- They send it. From your side, this is an inbound conversation from someone who has never spoken to you before.
Three things are different from an ordinary lead ad: there is no form, the customer messaged you (which matters for cost), and they expect a reply in seconds, because WhatsApp is where their friends reply in seconds.
What it costs: two bills, and one of them can be zero
You pay Meta for the ad, priced like any other ad. Then there is the WhatsApp messaging cost — and this is where click-to-WhatsApp ads are unusually generous.
A conversation that starts from a click-to-WhatsApp ad (or a Facebook Page call-to-action button) opens a free entry point. If you reply within 24 hours, a 72-hour window opens in which all your messages — templates included — are free. An ordinary customer-initiated chat gives you 24 hours of free replies; this gives you three days, with templates.
Meta's rules change, so check the current pricing documentation before you plan around it. But as it stands, three days is long enough to qualify, send details, follow up and book — without paying for a single template. How the rest of your WhatsApp bill works.
The catch is in the first condition: if you reply within 24 hours. Miss that, and you have paid for a click and lost the window.
The first five minutes decide the lead
Buyers go overwhelmingly with whoever answers first, and a click-to-WhatsApp lead is the most impatient lead you will ever get: they were scrolling a minute ago, and they will be scrolling again in two. Why five minutes decides the deal.
Your ads run at night, at weekends and on public holidays, which is precisely when nobody is watching the WhatsApp inbox. That is the case for an AI chatbot on the number: not to replace your sales team, but to make sure the reply always arrives while the person is still holding the phone.
Setting up the ad so the follow-up works
Write a pre-filled message per ad
The pre-filled text is the first thing your team or your bot will read. "Hi" tells you nothing. "Hi, I'd like the price list for 2BHK in Whitefield" tells you which ad, which product and which question — and it is the cheapest way to know which campaign a lead came from when you look at the chat later.
Make the first reply a question, not a brochure
A wall of text and three PDFs in reply to "price please?" is the fastest way to end a conversation. Answer briefly, then ask the one question that qualifies: budget, location, when they want it. Four questions in an order that survives a real conversation.
Decide the finish line before you spend
What counts as a good outcome — a booked visit, a demo, a payment, a callback? Whatever it is, the bot or the team should be steering every conversation towards it, and you should be counting that, not cost per message.
Send ads to the hours someone can answer
If a lead needs a human to close, an ad schedule that runs heavily at 2am fills the inbox for the morning, by which point half those people have moved on. Either cover the night with a bot that can qualify and book, or move budget into the hours you can answer.
After the 72 hours
Most click-to-WhatsApp leads do not buy in the first conversation. When the free window closes, reaching them needs an approved template, and it should be one worth opening.
- Follow up with a reason. A new slot, a price change, the answer to the question they asked. "Just checking in" is how numbers get reported. Recovering a quiet enquiry.
- Use the phone as well. Someone who stopped replying on WhatsApp may well answer a call. A campaign that calls, then messages, then emails, and stops the moment they respond, reaches far more people than WhatsApp alone. How many times to follow up.
- Stop when they say stop. Blocks and reports lower your quality rating, and a low rating cuts how many people you can message. How messaging limits work.
Measure the right thing
Cost per click and cost per conversation are what the ads dashboard shows, so they are what teams optimise. Neither tells you whether the money worked. Track, per ad:
- Conversations started — from the ads dashboard.
- Replied within five minutes — from your inbox.
- Qualified — the lead stage moved past "new".
- Outcome — a visit, a booking or a sale.
A cheap ad that fills the inbox with "hi" and nothing else is the expensive one.
Running click-to-WhatsApp leads through Convarza
Point your WhatsApp channel at an AI chatbot and every ad conversation gets an answer in seconds, at any hour. The bot reads the pre-filled message, answers from your knowledge base, asks your qualifying questions and can book a slot from your calendar inside the chat. Handover conditions send qualified or difficult chats to a person in the shared inbox, with the thread and the contact record beside it.
The ones that go quiet can be picked up by a campaign that calls, sends a WhatsApp and emails in the order you write, and stops per person the moment they reply. The "Unreplied" filter in the inbox shows any conversation that slipped through. See how property teams use this in real estate lead conversion, and D2C brands in the omnichannel inbox for D2C.