Gmail Customer Support Auto-Responder with Ollama LLM and Pinecone RAG

Built by Setidure Technologies
Automate intelligent, friendly replies to customer queries using AI, vector search, and Gmail — all without human effort.

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Overview

This is a ready-to-deploy smart customer support automation template for businesses that want to reply to emails instantly and accurately with the warmth of a human agent.

It uses Gmail, LangChain agents, Ollama-hosted LLMs, and Pinecone vector search to craft contextual, brand-aligned replies at scale.

Note: This template uses community nodes and requires a self-hosted n8n instance.

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What the Workflow Does

1. Triggers on Incoming Emails

• Uses Gmail Trigger node to listen for new messages
• Activates every minute to ensure fast responses

2. Classifies Email Intent

• A LangChain Text Classifier detects whether the email is a Customer Support query
• Non-relevant emails are skipped

3. Generates AI Response

• An AI Agent powered by Ollama generates the email reply
• Follows a predefined tone: "Mr. Aashit Sharma from Setidure Technologies"
• Written in a warm, human tone with natural phrasing

4. Retrieves FAQ-Based Knowledge

• Connects to Pinecone vector database for real-time FAQ retrieval
• Enhances responses with specific, accurate product or policy information

5. Labels Email in Gmail

• Automatically tags emails with labels like Handled or Auto-Replied for easy tracking

6. Sends Email Reply

• Sends the generated response back to the customer
• Includes personal sign-off and clean formatting

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Tech Stack Used

• Gmail Trigger & Send Nodes
• LangChain AI Agent & Classifier
• Ollama LLMs (e.g., phi4, llama3)
• Pinecone Vector Store
• Custom Prompts for Brand Persona
• Local Embeddings using Ollama

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Key Features

• Fully automated — no human action needed
• Local LLMs ensure data privacy
• Real-time answers powered by vector search
• Brand-personality aligned tone
• Organized inbox with Gmail labels

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Best For

• Startups scaling support with limited staff
• SaaS companies or e-commerce businesses
• Privacy-conscious enterprises using local LLMs
• Teams building branded auto-communication workflows

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Customization Tips

• Modify AI prompt to reflect your brand's voice and tone
• Expand classifier for more email categories
• Replace Gmail output with Slack, Notion, or your CRM
• Update Pinecone FAQ index to match evolving support content

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