Personalized B2B cold email sequence with GPT-4 + Gmail auto-reply detection

Open on n8n.io

$20/month : Unlimited workflows

2500 executions/month

Try free

THE #1 IN WEB SCRAPING

Scrape any website without limits

Try free

HOSTINGER

Early Deal
DISCOUNT 20%

Self-hosted n8n

Unlimited workflows - from $4.99/mo

Try free

#1 hub for scraping, AI & automation

6000+ actors - $5 credits/mo

Try free

Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Automated B2B Cold Email Sequence with AI Personalization Stop manually sending follow ups. This workflow automates your entire cold email outreach with AI powered personalization, smart schedul...

Best for

Lead Nurturing automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

@n8n/n8n-nodes-langchain.lmchatopenai, n8n-nodes-base.gmailtool, n8n-nodes-base.googlesheets, n8n-nodes-base.gmailtrigger, n8n-nodes-base.if, n8n-nodes-base.slack, @n8n/n8n-nodes-langchain.agent, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Peyrichou Maxime.

Original n8n.io source

1.1 Workflow description

Title: Personalized B2B cold email sequence with GPT-4 + Gmail auto-reply detection
Workflow name: Personalized B2B cold email sequence with GPT-4 + Gmail auto-reply detection

🎯 Automated B2B Cold Email Sequence with AI Personalization

Stop manually sending follow-ups. This workflow automates your entire cold email outreach with AI-powered personalization, smart scheduling, and automatic reply detection.

✨ What It Does

This workflow sends a perfectly-timed 3-email sequence to B2B prospects with:

AI-generated personalized emails adapted to each prospect's sector, company size, and role
Smart scheduling: Only sends Tuesday/Wednesday/Thursday at optimal times (~9AM with randomization)
Bilingual support: Auto-detects French or English prospects
Reply detection: Automatically stops the sequence when someone replies
Spam prevention: Randomized sending times, professional intervals
Full tracking: Updates Google Sheets with send status and reply detection
Slack notifications: Get alerted immediately when a hot lead responds

📊 Expected Results

Based on real usage:

10-15% reply rate (vs 3-8% for generic cold emails)
2-5 hot leads per 30 prospects contacted
90% time saved vs manual outreach
Professional delivery that preserves sender reputation

🎬 How It Works

Add prospect to Google Sheet (Email, Name, Company, etc.)
Workflow triggers automatically on new row
Time planning calculates optimal send dates (Tue/Wed/Thu only)
Email 1 (J0): AI generates introduction with value prop (80-120 words)
Wait 3 days
Email 2 (J+3): Follow-up with new angle or case study (70-90 words)
Wait 4 days
Email 3 (J+7): Final soft close, respectful exit (60-100 words)
Reply detection: Monitors Gmail → marks prospect "hot" → Slack alert → stops sequence

🚀 Perfect For

Sales teams doing B2B cold outreach
Agencies prospecting new clients
SaaS founders building their pipeline
Consultants/freelancers doing business development
Anyone tired of manual follow-ups and low response rates

⚙️ Requirements

Required:

Google Sheets (free)
Gmail account (free)
OpenAI API key (~$0.50 per 100 emails)

Optional:

Slack (for notifications)

n8n version: Compatible with n8n 1.0+

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - OpenAI Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.3

Block 2 - Gmail Tool - Send Email 1

Type / Role: n8n-nodes-base.gmailTool - gmailTool
Config choices: Version 2.1

Block 3 - OpenAI Chat Model 2

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.3

Block 4 - Gmail Tool - Send Email 2

Type / Role: n8n-nodes-base.gmailTool - gmailTool
Config choices: Version 2.1

Block 5 - OpenAI Chat Model 3

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.3

Block 6 - Gmail Tool - Send Email 3

Type / Role: n8n-nodes-base.gmailTool - gmailTool
Config choices: Version 2.1

Block 7 - Final Update to Sheet

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 8 - Gmail Reply Trigger

Type / Role: n8n-nodes-base.gmailTrigger - gmailTrigger
Config choices: Version 1.3

Block 9 - Mark Prospect as Hot

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 10 - Check Status Before Email 2

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 11 - Check if Hot After Email 2

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.2

Block 12 - Check Status Before Email 3

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 13 - Check if Hot After Email

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.2

Block 14 - Send a message

Type / Role: n8n-nodes-base.slack - slack
Config choices: Version 2.3

Block 15 - Agent : Email 1

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 3

Block 16 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 17 - Google Sheets Trigger

Type / Role: n8n-nodes-base.googleSheetsTrigger - googleSheetsTrigger
Config choices: Version 1

Block 18 - Merge

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 19 - Update Statut Email 2

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 20 - Entreprise Description

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 21 - Merge1

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 22 - Merge2

Type / Role: n8n-nodes-base.merge - merge
Config choices: Version 3.2

Block 23 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 24 - Error Trigger

Type / Role: n8n-nodes-base.errorTrigger - errorTrigger
Config choices: Version 1

Showing the first 24 of 42 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	Personalized B2B cold email sequence with GPT-4 + Gmail auto-reply detection
Complexity	advanced
Nodes	42
Categories	Lead Nurturing, Multimodal AI
Author	Peyrichou Maxime
Published	20 Nov 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/11037/11037.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Lead Nurturing workflows Multimodal AI workflows

Frequently asked questions

What does Personalized B2B cold email sequence with GPT-4 + Gmail auto-reply detection do?

Automated B2B Cold Email Sequence with AI Personalization Stop manually sending follow ups. This workflow automates your entire cold email outreach with AI powered personalization, smart schedul...

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Lead Nurturing, Multimodal AI use case.

Peyrichou Maxime

1 workflow

Nodes

@n8n/n8n-nodes-langchain.lmchatopenai n8n-nodes-base.gmailtool n8n-nodes-base.googlesheets n8n-nodes-base.gmailtrigger n8n-nodes-base.if n8n-nodes-base.slack @n8n/n8n-nodes-langchain.agent n8n-nodes-base.stickynote

Complexity

advanced

Published 20 Nov 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/11037/11037.json

Share Your Workflow

Have a useful automation to share? Publish it and help the community.

Submit Your Template How to Submit

Related Workflows

Re-engage missed property viewings with Google Calendar, Gemini, Gmail, and WhatsApp

## Quick overview When a buyer misses a scheduled viewing, this workflow automatically sends an AI-personalized follow-up by email and WhatsApp using Google Gemini, then logs the outcome to Google Sheets, recovering leads that would otherwise go cold. ## How it works 1. Triggers every 15 minutes when a Google Calendar event is updated in the selected viewings calendar. 2. Checks the event title/summary and continues only if it contains the tag “no-show”. 3. Extracts the lead’s name, email, phone, property address, and scheduled viewing time from the calendar event details. 4. Sends the lead and viewing context to Google Gemini to generate an email message and a WhatsApp message in JSON format. 5. Parses and cleans the AI output into safe HTML for email and a trimmed plain-text WhatsApp message. 6. Sends the re-engagement email via Gmail and appends the follow-up outcome to a Google Sheets log. 7. If a phone number is available, sends the WhatsApp message and updates a Google Sheets status field to record that WhatsApp was sent. ## Setup 1. Connect credentials for Google Calendar, Gmail, Google Sheets, and a Google Gemini (PaLM) API key. 2. Select the correct Google Calendar (viewings calendar) and ensure missed appointments are consistently tagged with “no-show” in the event summary. 3. Create or choose a Google Sheets document and sheet, then fill in the document ID/URL, sheet name, and the columns expected by the append/update logging steps. 4. Configure WhatsApp credentials in n8n (or disable the WhatsApp branch) and ensure lead phone numbers are stored in the calendar event description in the expected format (e.g., Name: ... | Email: ... | Phone: ... |). ## Requirements - Before running this workflow, create a Google Sheet with these exact column headers: Record ID | Lead Name | Email | Phone | Property Address | Original Viewing Time | Email Sent | WhatsApp Sent | Email Message Text | WhatsApp Message Text | Timestamp ## Customization - Edit the AI prompt in "Draft Re-Engagement Messages" to change tone or language - Add SMS or other channels by duplicating the WhatsApp branch pattern - Adjust the "no-show" tag keyword if your calendar uses different terminology ## Additional info WhatsApp is optional. If you don't have WhatsApp Business Cloud API credentials, disable that branch — the email follow-up will still send normally. This template assumes calendar events are tagged with "no-show" in the title and include lead contact info in the event description (Name: ... | Email: ... | Phone: ... |).

View

Quote freight shipments via WhatsApp with Google Gemini, HighLevel, and Warp

## Quick overview Youtube Video: https://youtu.be/kO4LgKT6oME?si=VpUEz2LKuxMujrUp This workflow receives WhatsApp messages, checks the sender in HighLevel, and uses Google Gemini with Redis chat memory to collect shipment details, then requests an LTL quote from the Warp API, applies a commission, and replies with either a conversational prompt or a final freight quote. ## How it works 1. Receives an incoming WhatsApp message and only continues when the text body is not empty. 2. Looks up the sender’s phone number in HighLevel and stops contacts marked as Do Not Disturb from being processed further. 3. Uses a Google Gemini-powered agent with Redis chat memory to ask for missing contact and freight details in a fixed order, optionally creating the HighLevel contact or marking the lead as DND when the user opts out. 4. Parses the agent’s structured JSON output and checks whether the required shipment data collection is complete. 5. If data is incomplete, sends the agent’s conversational reply back to the user via WhatsApp. 6. If data is complete, posts the shipment details to the Warp LTL quote API, adds a configured commission percentage to the returned price, and sends the finalized quote back to the user via WhatsApp. ## Setup 1. Connect WhatsApp credentials for both the WhatsApp Trigger and WhatsApp “send message” actions, and configure the webhook in Meta/WhatsApp so inbound messages reach this workflow. 2. Add a HighLevel OAuth2 credential and confirm your HighLevel account has permission to search contacts, create contacts, and update the DND field. 3. Add a Google Gemini (PaLM) API credential and a Redis credential for chat memory, and ensure Redis is reachable from your n8n instance. 4. Add an HTTP Header Auth credential for the Warp API and verify the quote endpoint URL, headers, and request body fields match your Warp account requirements. 5. Adjust the commission percentage value (and any quoting assumptions like weight per pallet) to match your pricing policy.

View

Qualify web leads and send replies with Groq, Gmail, Sheets and Slack

## Quick Overview This workflow receives new lead form submissions via webhook, uses Groq (OpenAI-compatible Chat Completions) to score and draft a reply, then sends the email via Gmail, logs the lead to Google Sheets as a lightweight CRM, and posts a lead alert to Slack. ## How it works 1. Receives a POST request from your lead/contact form via a webhook. 2. Extracts and normalizes common form fields (name, email, message, service interest, phone, company) and stops if no email is provided. 3. Sends the lead details to Groq’s Chat Completions API to generate a lead score/tier, intent summary, urgency, a drafted reply email, and a Slack note. 4. Parses the Groq JSON response and flags leads as “hot” when the score is 8 or higher. 5. Sends the drafted reply to the lead using Gmail. 6. Appends the lead details and AI outputs to a Google Sheets “Leads-CRM” sheet and posts a formatted alert to a Slack channel. 7. Returns a JSON confirmation response to the original webhook request. ## Setup 1. Configure your form provider to POST submissions to the workflow’s webhook URL (path: `/new-lead`). 2. Add an HTTP Header Auth credential containing your Groq API key for the Groq Chat Completions request. 3. Connect Gmail OAuth2 credentials and set the desired Reply-To address (default is `[email protected]`). 4. Connect Google Sheets OAuth2 credentials and update the target spreadsheet and sheet to match your CRM columns. 5. Connect Slack credentials and choose the destination channel (default: `#leads`).

View

Need Custom Automation?

Get help designing a custom n8n workflow that connects your stack and fits your process.

Personalized B2B cold email sequence with GPT-4 + Gmail auto-reply detection

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

🎯 Automated B2B Cold Email Sequence with AI Personalization

✨ What It Does

📊 Expected Results

🎬 How It Works

🚀 Perfect For

⚙️ Requirements

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - OpenAI Chat Model

Block 2 - Gmail Tool - Send Email 1

Block 3 - OpenAI Chat Model 2

Block 4 - Gmail Tool - Send Email 2

Block 5 - OpenAI Chat Model 3

Block 6 - Gmail Tool - Send Email 3

Block 7 - Final Update to Sheet

Block 8 - Gmail Reply Trigger

Block 9 - Mark Prospect as Hot

Block 10 - Check Status Before Email 2

Block 11 - Check if Hot After Email 2

Block 12 - Check Status Before Email 3

Block 13 - Check if Hot After Email

Block 14 - Send a message

Block 15 - Agent : Email 1

Block 16 - Sticky Note

Block 17 - Google Sheets Trigger

Block 18 - Merge

Block 19 - Update Statut Email 2

Block 20 - Entreprise Description

Block 21 - Merge1

Block 22 - Merge2

Block 23 - Sticky Note1

Block 24 - Error Trigger

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions