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

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Created by: Aashit Sharma || aashitsharma

Aashit Sharma

Last update

Last update 15 days ago

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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.

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.

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

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

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

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

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