The Lead Follow-Up Stack — Answer Every Inquiry in Under a Minute
The most expensive thing in your business is a lead nobody answered. Research on lead response consistently shows the same pattern: reply within 5 minutes and you're talking; reply after 30 minutes and the lead is already texting your competitor.
Most small businesses don't have a response-time problem between 9 and 6. They have one at lunch, after hours, on weekends — exactly when high-intent buyers browse.
This stack fixes that with three layers. Total cost from $75/month. No developers required for the basic version.
The stack
| Layer | Tool | What it does | Cost |
|---|---|---|---|
| Conversation | WhatsApp Business API via Wati or respond.io | Instant reply, qualification questions, human handoff | from $49/mo |
| Orchestration | n8n | Captures the lead from any source (site form, ad, missed call), fires the WhatsApp flow, logs to your CRM/sheet | free self-hosted or $26/mo cloud |
| Voice (optional) | Retell AI | AI answers the phone when nobody picks up, books the visit, sends summary to WhatsApp | ~$0.11/min used |
Not sure which WhatsApp platform fits? We compared them head-to-head: Wati vs respond.io.
How the flow works
- Lead arrives — web form, click-to-WhatsApp ad, marketplace listing or missed call.
- n8n catches the event via webhook and creates/updates the contact.
- WhatsApp template message goes out in seconds: greeting + one qualification question.
- Buyer replies → conversation lands in your team inbox, already tagged with source and interest.
- No reply in 24h → one polite follow-up. Still nothing after 72h → lead marked cold, no spam.
- Every step logged to a sheet or CRM — you see response times and conversion per source.
Grab the free template
The exact n8n workflow for steps 1–6 is free on our templates page — import the JSON, connect your WhatsApp provider and a sheet, done. The paid version adds missed-call recovery, lead scoring and a dealership-specific variant.
What this stack costs vs what it saves
At $75–150/month all-in, the stack pays for itself with one recovered sale for almost any business selling anything over $200. Model your own numbers in the automation cost calculator, and if phone calls are your main channel, check the AI voice agent calculator — it shows the AI-vs-human cost line at your call volume.
Real-world proof
This is not theory. A car dealership in Brazil runs this exact pattern in production — every incoming lead answered on WhatsApp in under a minute, missed calls recovered automatically, inventory posts scheduled without a human touching them. We documented it: the car dealership AI stack.
Affiliate note: some links above are affiliate links (marked sponsored). Commissions never change the tools we list — the stack works the same whichever WhatsApp platform you pick.