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Client review collection & sentiment analysis with HighLevel, GPT-4o, Gmail & Slack

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Client review collection & sentiment analysis with HighLevel, GPT-4o, Gmail & Slack preview
Open on n8n.io

Important notice

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

1. Workflow Overview

Description: This automation streamlines client review collection and sentiment summarization for Techdome using HighLevel CRM, Azure OpenAI GPT 4o, Gmail, Slack, and Google Sheets. It starts by...

Best for

  • CRM automation workflows
  • Multimodal AI automation workflows
  • advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.manualtrigger, n8n-nodes-base.if, n8n-nodes-base.googlesheets, n8n-nodes-base.highlevel, @n8n/n8n-nodes-langchain.agent, @n8n/n8n-nodes-langchain.lmchatazureopenai, n8n-nodes-base.gmail, n8n-nodes-base.wait

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title
Client review collection & sentiment analysis with HighLevel, GPT-4o, Gmail & Slack
Workflow name
Client review collection & sentiment analysis with HighLevel, GPT-4o, Gmail & Slack

📘 Description:

This automation streamlines client review collection and sentiment summarization for Techdome using HighLevel CRM, Azure OpenAI GPT-4o, Gmail, Slack, and Google Sheets. It starts by pulling recently won deals from HighLevel, then generates and sends AI-written HTML review request emails with built-in Google Review and feedback form links. After waiting 24 hours, it fetches the client’s reply thread, summarizes the sentiment using GPT-4o, and posts a clean update to Slack for team visibility. Any failures—API errors, empty responses, or data validation issues—are logged automatically to Google Sheets for full transparency and QA. The result: a fully hands-free Client Appreciation + Feedback Intelligence Loop, improving brand perception and internal responsiveness.

⚙️ What This Workflow Does (Step-by-Step)

▶️ When Clicking ‘Execute Workflow’ (Manual Trigger) Allows on-demand execution or scheduled testing of the workflow. Initiates the fetch for all newly “Won” deals from HighLevel CRM.

🏆 Fetch All Won Deals from HighLevel Retrieves all opportunities labeled “won” in HighLevel, gathering essential client details such as name, email, and deal information to personalize outgoing emails.

🔍 Validate Deal Fetch Success (IF Node) Checks each record for a valid id field. ✅ True Path: Moves ahead to generate AI email content. ❌ False Path: Logs the event to Google Sheets under the error log sheet.

🧠 Configure GPT-4o Model (Azure OpenAI) Initializes the GPT-4o engine that powers all language-generation tasks in this workflow—ensuring precise tone, correct formatting, and safe structured HTML output.

💌 Generate Personalized Review Request Email (AI Agent) Uses GPT-4o to create a tailored, HTML-formatted email thanking the client for their business and requesting feedback. Includes two clickable CTA buttons:

⭐ Google Review Link:
📝 Internal Feedback Form: Google Form link for in-depth feedback Each email maintains Techdome’s friendly, brand-consistent voice with clean inline CSS styling.

📨 Send Review Request Email to Client (Gmail Node) Automatically sends the AI-generated email to the client’s registered address through Gmail. Ensures timely post-service communication without manual follow-ups.

⏳ Wait for 24 Hours Before Next Action Pauses the workflow for 24 hours to give clients time to read and respond to the review request.

📥 Retrieve Email Thread for Response (Gmail Node) After the waiting period, fetches the Gmail thread associated with the initial email to capture client replies or feedback messages.

🧠 Configure GPT-4o Model (Summarization Engine) Prepares another GPT-4o instance specialized for summarizing client replies into concise, sentiment-aware Slack messages.

💬 Summarize Client Feedback (AI Agent) Analyzes the Gmail thread and produces a short Slack-formatted summary using this structure:

🎉 *New Client Review Received!*Client: <Name>
Feedback: <Message snippet>
Sentiment: Positive / Neutral / Negative Focuses on tone clarity and quick readability for internal teams.

📢 Announce Review Summary in Slack Posts the AI-generated summary in a designated Slack channel, keeping success and support teams instantly informed of client sentiments and feedback trends.

📊 Log Errors in Google Sheets Appends all failures—including fetch issues, missing fields, or parsing errors—to the Google Sheets “error log sheet,” maintaining workflow reliability and accountability.

🧩 Prerequisites

  • HighLevel CRM OAuth credentials (to fetch deals)
  • Azure OpenAI GPT-4o access (for AI-driven writing and summarization)
  • Gmail API connection (for sending & reading threads)
  • Slack API integration (for posting summaries)
  • Google Sheets access (for error logging)

💡 Key Benefits

✅ Automates personalized review outreach after project completion ✅ Waits intelligently before analyzing responses ✅ Uses GPT-4o to summarize client sentiment in human tone ✅ Sends instant Slack updates for real-time visibility ✅ Keeps audit logs of all errors for debugging

👥 Perfect For

  • Client Success and Account Management Teams
  • Agencies using HighLevel CRM for project delivery
  • Teams aiming to collect consistent client feedback and reviews
  • Businesses wanting AI-assisted sentiment insights in Slack

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 - When clicking ‘Execute workflow’

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

Block 2 - Validate Deal Fetch Success

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

Block 3 - Log Errors in Google Sheets

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.6

Block 4 - Fetch All Won Deals from HighLevel

Type / Role
n8n-nodes-base.highLevel - highLevel
Config choices
Version 2

Block 5 - Generate Personalized Review Request Email (AI)

Type / Role
@n8n/n8n-nodes-langchain.agent - agent
Config choices
Version 2.1

Block 6 - Configure GPT-4o Model

Type / Role
@n8n/n8n-nodes-langchain.lmChatAzureOpenAi - lmChatAzureOpenAi
Config choices
Version 1

Block 7 - Send Review Request Email to Client

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

Block 8 - Retrieve Email Thread for Response

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

Block 9 - Configure GPT-4o Model1

Type / Role
@n8n/n8n-nodes-langchain.lmChatAzureOpenAi - lmChatAzureOpenAi
Config choices
Version 1

Block 10 - Wait for 24 Hours Before Next Action

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

Block 11 - Summarize Client Feedback (AI)

Type / Role
@n8n/n8n-nodes-langchain.agent - agent
Config choices
Version 2.1

Block 12 - Announce Review Summary in Slack

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

Block 13 - Sticky Note

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

Block 14 - Sticky Note1

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

Block 15 - Sticky Note2

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

Block 16 - Sticky Note3

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

Block 17 - Sticky Note4

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

Block 18 - Sticky Note5

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

Block 19 - Sticky Note6

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

Block 20 - Sticky Note7

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

3. Summary Table

Workflow Client review collection & sentiment analysis with HighLevel, GPT-4o, Gmail & Slack
Complexity advanced
Nodes 20
Categories CRM, Multimodal AI
Author Rahul Joshi
Published 30 Oct 2025

4. Reproducing the Workflow from Scratch

  1. 1. Download the workflow JSON

    Use the JSON export at /data/workflows/10327/10327.json as the source template for this automation.

  2. 2. Import the template into n8n

    Open n8n, import the downloaded JSON, and review each node before activating the workflow.

  3. 3. Configure credentials and variables

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

  4. 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. 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.

Frequently asked questions

What does Client review collection & sentiment analysis with HighLevel, GPT-4o, Gmail & Slack do?

Description: This automation streamlines client review collection and sentiment summarization for Techdome using HighLevel CRM, Azure OpenAI GPT 4o, Gmail, Slack, and Google Sheets. It starts by...

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 CRM, Multimodal AI use case.