Send AI-prioritized follow-up reminders with GPT-4.1-mini, Gmail and Slack
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
Nodes used (12)
- Google Sheets Trigger
n8n-nodes-base.googleSheetsTrigger - Edit Fields (Set)
n8n-nodes-base.set - AI Agent
@n8n/n8n-nodes-langchain.agent - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Switch
n8n-nodes-base.switch - Gmail
n8n-nodes-base.gmail - Slack
n8n-nodes-base.slack - Twilio
n8n-nodes-base.twilio - Google Sheets
n8n-nodes-base.googleSheets - Schedule Trigger
n8n-nodes-base.scheduleTrigger - Error Trigger
n8n-nodes-base.errorTrigger
What it does
Who’s it for Consultants, agencies, freelancers, and project managers who want to ensure proposals, emails, and tasks are followed up on time. How it works / What it does This n8n workflow automates follow-up reminders: 1. Triggers when a new proposal, task, or client email is logged in Google Sheets, CRM, or project management tool. 2. Normalizes data for client name, email, task, and due date. 3. Uses OpenAI AI to classify urgency (high, medium, low). 4. Routes reminders based on urgency: - High → Immediate email and Slack alert - Medium → Scheduled email reminder - Low → Weekly summary reminder 5. Logs follow-up status in Google Sheets. 6. Sends daily Slack summary of all pending reminders. 7. Optional: SMS notifications for VIP clients via Twilio. 8. Includes error handling and retry logic for reliability. How to set up 1. Connect Google Sheets, CRM, or project tool. 2. Configure Gmail/Outlook for emails. 3. Connect Slack for notifications. 4. Optional: Connect Twilio for SMS. 5. Connect OpenAI API for AI urgency classification. 6. Adjust decision nodes to match your priority workflow. 7. Test workflow with sample data to confirm routing works. Requirements - n8n account with Gmail/Outlook, Slack, Twilio integrations. - OpenAI API key for urgency classification. How to customize - Adjust AI prompt to classify urgency per your business rules. - Customize Slack channels and email templates. - Add new routes (e.g., CRM updates, calendar scheduling) for additional automation. --- Created by Hyrum Hurst / QuarterSmart Keywords: AI follow-up automation, task reminders, proposal follow-up, consulting workflow, n8n workflow, QuarterSmart