Automate Lead Follow-ups with GPT-4o mini Analysis for Gmail, HubSpot, and Slack

Gmail Lead Reply Analyzer → HubSpot Task + Slack Alert

Most sales teams read every email, guess if it’s important, and tell teammates manually.

This workflow does it automatically: check intent and sentiment with AI, create follow-up tasks, send Slack alerts, and save everything to Google Sheets.

Benefits
AI checks sentiment, intent, urgency, and priority
Creates HubSpot tasks only if follow-up is needed
Sends Slack message with lead summary
Logs all results to Google Sheets for tracking
Runs 24/7 with no manual sorting

How It Works
Gmail trigger watches a label for new replies
Workflow extracts sender, subject, and message
AI analyzes message and returns: sentiment, intent, urgency, next step
Code step cleans result, adds date, and checks if follow-up is needed
If follow-up = yes → create HubSpot task, send Slack alert, log to Sheets
If follow-up = no → just log to Sheets

Who Is This For
Sales teams getting many leads by email
Founders who handle leads themselves
Agencies needing clear and fast lead triage

Setup
Connect Gmail (choose or create label)
Add OpenAI API key (model: GPT-4o mini)
Connect HubSpot (App Token for tasks)
Connect Slack (channel for alerts)
Connect Google Sheets (Spreadsheet + Tab)
Optional: change how urgency/priority is scored in the code

ROI & Monetization
Save 3–6 hours per week on email sorting
Answer faster and close more deals
Sell as $1k–$3k/month “inbox automation” service

Strategy Insights
In the full walkthrough, I show how to:
Make sure AI always returns valid JSON
Adjust what counts as a follow-up lead
Format Slack messages for quick reading
Use Google Sheets as a simple dashboard

Check Out My Channel

For more AI automation systems that get real results, check out my YouTube channel where I share exactly how I build automation workflows, sell high-value services, and scale to $20k+ monthly revenue.