Send AI lead follow-up SMS with GPT-4.1, Google Sheets, Twilio and Gmail

How it works - Triggered when a lead submits your website contact form via webhook - Logs the lead's Name, Phone, Email, and Interest to Google Sheets - GPT-4.1 generates a personalised SMS and sends it instantly via Twilio - Waits 2 hours, then checks if the lead has replied (via Google Sheets) - If replied: notifies you via Gmail. If not: sends an AI follow-up SMS

Set up steps - Add your OpenAI API key to both OpenAI nodes (model: GPT-4.1) - Connect your Twilio account (Account SID + Auth Token) in both SMS nodes - Link Google Sheets via OAuth and set your sheet with columns: Name, Phone, Email, Interest, Replied - Connect Gmail via OAuth for owner notifications - Paste the webhook URL into your website contact form as the POST endpoint - Manually update the Replied column to Yes in Google Sheets when a lead responds