Developer Builds WhatsApp Sales Inbox Using Google Sheets, Apps Script, and GPT-4o-mini

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A developer solved a real-world sales coordination problem after two reps simultaneously chased the same WhatsApp lead, causing the customer to disengage. The solution routes every inbound WhatsApp message into a Google Sheet, where each entry receives an AI-generated buying-intent score via GPT-4o-mini. A 15-minute lead-lock mechanism then assigns hot or warm leads to a single rep, preventing duplicate outreach. The entire backend runs on approximately 80 lines of Google Apps Script, using a webhook to capture messages and a time-driven trigger to handle scoring separately. The approach is positioned as a lightweight, low-cost alternative to enterprise CRMs for small sales teams already using Google Workspace.

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