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

Description

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