Sell this AI system to restaurants every month

Four parts, one system: text back missed calls, draft review replies, send booking reminders and report the results. Here's how each part works, and what you need before you sell it.

Built withn8n, an AI model and a phone number

Parts4

Human checkBad reviews go to the manager first

Checked on 15 Oct 2026. Tools change fast, so the official page always wins if it says something different.

What you need first

1n8nRuns the workflows.

2An AI modelDrafts the replies in the owner's voice.

3A phone providerFor the missed-call texts, for example Twilio.

4Access to Meta's WhatsApp Business PlatformFor the booking reminders.

Step by step

Missed-call text back

When nobody picks up, the caller gets a text with the booking link straight away.

Tip: In the US, business texting from a normal number needs A2P 10DLC registration, through providers like Twilio.

Review replies, with a human check

The AI drafts a reply to every Google review in the owner's voice. Bad reviews go to the manager first.

Tip: Posting replies automatically needs Google Business Profile API access approval. Until you have it, the owner approves each draft and posts it by hand.

WhatsApp booking reminders

Send a reminder before each booking, so fewer people don't show up.

Tip: This goes through Meta's WhatsApp Business Platform. It needs approved message templates and charges per message in most countries.

A monthly report

Once a month, send the owner a simple report: calls saved, bookings and the review score.

Test it before you sell it

Run it for one restaurant first and check the messages before they go out.

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The catch

It isn't plug and play. WhatsApp needs approved templates and per-message fees, US texting needs registration, and posting review replies needs API approval.
Keep a human in the loop for bad reviews and anything sensitive.
Customer phone numbers are personal data. Only text people who called the restaurant, and follow your local rules.
Set your price so it covers the running costs, like per-message fees. A setup fee plus a monthly fee is one way to do it.

Official links

n8n ↗

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Unnerd AI · I'm not linked to n8n, Meta, Google or any phone provider, I just think this is useful.