Onboarding a new customer on WhatsApp after the first purchase: a seven-day sequence that answers questions before they are asked and earns the second order
The first week after a purchase is when a customer decides whether you are a one-off or their regular. Most businesses go silent after the receipt. The ones that keep customers send a few short, useful messages in that week and answer the questions that come back within minutes.
Quick answer
Send five messages across the first seven days, each a reply to the relationship the customer began by buying: a thank-you with what happens next (day 0), a how-to-use or what-to-expect note (day 1), a check-in (day 3), an invitation to ask anything (day 5), and a review or referral ask (day 7, only if the check-in was positive). Keep each under four lines. An AI agent answers the questions these messages prompt, at any hour, from your knowledge, and hands over complaints. Stop the moment a customer says stop. ReplyKit's agent handles the replies; the sequence itself you send by hand or from your quick replies.
The seven-day sequence
Day 0, thank you and next steps
Thanks for choosing {business}, {name}. Here's what happens next: {delivery or appointment detail}. If you have any question, just reply here; a real person and our assistant both read this chat.
Day 1, how to use or what to expect
Quick tip for your {product or service}: {one practical tip}. Most people find {common question} comes up; the answer is {answer}.
Day 3, check-in
How's the {product or service} so far? Anything not as expected? Reply here and we'll fix it quickly.
Day 5, invitation
One more thing: if you're wondering about {related topic, e.g. aftercare, add-ons, the next appointment}, ask away. Happy to help.
Day 7, review or referral (only after a positive check-in)
Glad it's working out. If you have 30 seconds, a review here helps us a lot: {link}. And if a friend needs {service}, send them our way.
The review ask is conditional; sending it to someone who complained on day 3 is how you earn a one-star review. The wording for that step is in the review request templates.
What the AI agent does in that week
- Answers the questions each message prompts: "how do I clean it", "can I change my appointment", "what is the aftercare", from the knowledge base, in seconds.
- Hands over complaints and anything negative in the check-in replies, so a person responds to unhappiness.
- On the Growth plan, sends one follow-up nudge if a customer asked something and went quiet.
- Records the conversation in the CRM, so the customer's stage moves from Won to a regular with a follow-up date.
- Does not send the sequence itself; those five messages are yours to send, from quick replies, because they are relationship messages and ReplyKit does not run campaigns.
The questions you see in week one are the first thing to add to the knowledge base; see turning conversations into FAQ content.
Keeping it welcome
- Only to customers who bought or booked and gave you their WhatsApp for that purpose. That is the consent; the consent rules explain the line.
- Five messages in a week is the ceiling. Daily is spam.
- Every message useful on its own: a tip, a check-in, an offer to help. No "just checking in" with nothing attached.
- Stop instantly on STOP, silence after day 7, and never add the customer to a broadcast list.
- Personalise with what they bought; a generic sequence reads as a campaign.
What to measure
Two numbers: how many new customers reply to the day 3 check-in, and how many buy again within 90 days. The first tells you whether the sequence feels human; the second whether it works. Mark repeat buyers in the CRM so the number is a report, not a feeling. The long-term play is in customer retention on WhatsApp.
Frequently asked questions
Is it allowed to message a customer after they buy?
Yes, when they gave you their WhatsApp for that purchase or booking. Keep it useful, keep it brief, and stop on request.
How many messages in the first week?
Five at most, each with something useful: next steps, a tip, a check-in, an invitation, and a conditional review ask.
Can an AI agent send the sequence?
The agent answers the questions the sequence prompts. The five messages themselves you send from quick replies, since they are relationship messages and ReplyKit does not run campaigns.
When should I ask for a review?
Day 7, only if the day 3 check-in was positive. Never after a complaint.
What if the customer does not reply at all?
Nothing. Silence is an answer. The next contact is when they message you or when a genuine reason arises, such as a renewal.
Earn the second order in the first week
Questions answered in seconds, complaints handed to you, every customer tracked. 7-day free trial, no card.
Sources and further reading
- Harvard Business Review, The Short Life of Online Sales Leads (Oldroyd, McElheran, Elkington, 2011) · firms that responded within an hour were about seven times more likely to qualify the lead
- WhatsApp Business Messaging Policy · opt-in, opt-out and prohibited-use rules every business must follow
ReplyKit is an independent product and is not affiliated with or endorsed by Meta or WhatsApp. This article is general guidance for running a small business, not legal, financial or regulatory advice.