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 reference stack uses three layers. Entry cost starts near $36/month with AiSensy plus a small self-hosted n8n VPS. Setup and testing are still required.
The stack
| Layer | Tool | What it does | Cost |
|---|---|---|---|
| Conversation | AiSensy for a lower-cost start, or Wati / respond.io | Instant reply, qualification questions, human handoff | from ~$30/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 |
For a budget-first test, try AiSensy and measure delivery, reply and appointment rates. For multi-channel team inboxes, compare 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
Do not assume payback. Model your own numbers in the lead recovery ROI calculator, then run a controlled test measuring delivered messages, replies and booked appointments.
How to validate it
Start with one lead source and one approved WhatsApp template. Compare a baseline week against an automated week. Keep the stack only if reply or appointment rate improves without complaints or opt-out problems. The car dealership AI stack shows the reference design.
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.