Skip to main content

Generate AI proposals as PDFs with GPT-4, Gmail, Google Drive and Slack

Workflow preview

Workflow preview
100%
Generate AI proposals as PDFs with GPT-4, Gmail, Google Drive and 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

AI Proposal Generator with PDF Delivery & Team Notifications Description Creating client proposals manually is slow, repetitive, and often inconsistent. This AI powered workflow transforms propo...

Best for

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

Tools used

n8n-nodes-base.webhook, n8n-nodes-htmlcsstopdf.htmlcsstopdf, n8n-nodes-base.gmail, n8n-nodes-base.googledrive, n8n-nodes-base.merge, n8n-nodes-base.set, @n8n/n8n-nodes-langchain.openai, n8n-nodes-base.code

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title
Generate AI proposals as PDFs with GPT-4, Gmail, Google Drive and Slack
Workflow name
Generate AI proposals as PDFs with GPT-4, Gmail, Google Drive and Slack

πŸ“„ AI Proposal Generator with PDF Delivery & Team Notifications

Description

Creating client proposals manually is slow, repetitive, and often inconsistent. This AI-powered workflow transforms proposal creation from a manual task into a fully automated, professional process.

With a single submission, this workflow generates a customized AI-written proposal, converts it into a polished PDF, emails it to the client, stores it in Google Drive, and notifies your internal team β€” ensuring faster turnaround, consistent quality, and zero missed steps.


What This Workflow Does

This workflow turns client requirements into ready-to-send proposals with minimal effort:

πŸ“ Capture Client & Project Details – A webhook receives client information, project scope, budget range, and timeline.

🧠 AI-Powered Proposal Writing – AI generates a structured, client-ready proposal tailored to the project requirements.

πŸ“„ HTML Proposal Formatting – The proposal content is converted into a clean, professional HTML layout.

πŸ“‘ PDF Generation – The HTML proposal is automatically converted into a downloadable PDF.

πŸ“§ Email Delivery – The proposal PDF is emailed directly to the client.

☁️ Google Drive Storage – A copy of the proposal is saved for record-keeping and reuse.

πŸ’¬ Slack Notification – Your team is notified when a proposal is generated and sent.

πŸ” Webhook Response – Returns a confirmation response for frontend or system integrations.


Key Features

πŸ€– AI Proposal Generation – Automatically creates professional proposals based on project inputs.

βš™οΈ End-to-End Automation – From input submission to PDF delivery, everything runs automatically.

πŸ“„ Professional PDF Output – Client-ready proposals with clean formatting.

πŸ“§ Automated Email Sending – No manual follow-ups required.

☁️ Centralized Storage – All proposals stored securely in Google Drive.

πŸ’¬ Team Notifications – Instant Slack alerts for visibility and tracking.

πŸ”€ Flexible Integration – Can be triggered from forms, CRMs, or web apps.


Perfect For

πŸš€ Freelancers & Consultants – Send proposals faster without writing from scratch.

🏒 Agencies & Service Providers – Standardize proposal quality across teams.

πŸ“ˆ Sales & Operations Teams – Reduce manual work and response time.

πŸ’» Startups & Small Businesses – Look professional without extra overhead.

🧠 Remote Teams – Keep everyone aligned with automated notifications.


What You’ll Need

Required Integrations

🌐 Webhook Trigger – Receives client and project details.

πŸ€– OpenAI – Generates proposal content.

πŸ“„ HTMLCSS to PDF – Converts HTML proposals into PDFs.

πŸ“§ Gmail – Sends proposal emails to clients.

☁️ Google Drive – Stores generated proposal files.

πŸ’¬ Slack – Sends internal notifications.


Optional Enhancements

πŸ“Š CRM Integration – Save proposal data to HubSpot, Airtable, or Salesforce.

🎨 Brand Customization – Add logos, brand colors, and styling to proposals.

🌍 Multilingual Proposals – Generate proposals in different languages.

πŸ” Approval Step – Add internal approval before sending proposals.

πŸ“ˆ Analytics Dashboard – Track proposal volume and turnaround time.

πŸ“Ž File Attachments – Include additional documents with the proposal email.


Quick Start

1️⃣ Import the workflow template into your n8n workspace 2️⃣ Connect credentials for OpenAI, Gmail, Google Drive, Slack, and HTMLCSS to PDF 3️⃣ Send test data to the webhook with client and project details 4️⃣ Review the generated proposal PDF 5️⃣ Activate the workflow and start sending proposals automatically


Customization Options

1️⃣ Proposal Branding – Update HTML layout, fonts, and colors. 2️⃣ AI Prompt Tuning – Adjust tone, length, or structure of proposals. 3️⃣ Email Messaging – Customize email subject and content. 4️⃣ Slack Messages – Modify notification text or channels. 5️⃣ Drive Organization – Change folder structure for stored proposals. 6️⃣ Pricing Logic – Adjust calculations for budget or timeline.


Expected Results

⚑ Faster Proposal Turnaround – Generate proposals in minutes instead of hours.

πŸ€– Consistent Quality – Every proposal follows a structured format.

πŸ“§ Instant Delivery – Clients receive proposals immediately.

πŸ—‚οΈ Organized Records – All proposals stored automatically.

πŸ’¬ Better Team Visibility – Everyone stays informed with Slack alerts.


Workflow Structure Visualization

πŸ“ Webhook Input ↓ 🧠 AI Proposal Generation ↓ πŸ“„ HTML Formatting ↓ πŸ“‘ PDF Conversion ↓ πŸ“§ Email Delivery ↓ ☁️ Google Drive Storage ↓ πŸ’¬ Slack Notification ↓ πŸ” Webhook Response


πŸš€ Ready to Automate Proposal Creation?

Import this template and let AI handle proposal writing, formatting, delivery, and tracking β€” so you can focus on closing deals faster. ✨

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 - Webhook

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

Block 2 - HTML to PDF

Type / Role
n8n-nodes-htmlcsstopdf.htmlcsstopdf - htmlcsstopdf
Config choices
Version 1

Block 3 - Send Email with PDF Attachment

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

Block 4 - Upload file

Type / Role
n8n-nodes-base.googleDrive - googleDrive
Config choices
Version 3

Block 5 - Merge

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

Block 6 - Define Pricing & Timeline Logic

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

Block 7 - Generate Proposal Content

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

Block 8 - Extract AI Content

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

Block 9 - Generates HTML

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

Block 10 - Send a message

Type / Role
n8n-nodes-base.slack - slack
Config choices
Version 2.4

Block 11 - Respond to Webhook

Type / Role
n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices
Version 1.5

Block 12 - Sticky Note

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

Block 13 - Sticky Note2

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

Block 14 - Sticky Note4

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

Block 15 - Sticky Note6

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

Block 16 - Sticky Note7

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

3. Summary Table

Workflow Generate AI proposals as PDFs with GPT-4, Gmail, Google Drive and Slack
Complexity advanced
Nodes 16
Categories Document Extraction, Multimodal AI
Author Jitesh Dugar
Published 12 Dec 2025

4. Reproducing the Workflow from Scratch

  1. 1. Download the workflow JSON

    Use the JSON export at /data/workflows/11731/11731.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 Generate AI proposals as PDFs with GPT-4, Gmail, Google Drive and Slack do?

AI Proposal Generator with PDF Delivery & Team Notifications Description Creating client proposals manually is slow, repetitive, and often inconsistent. This AI powered workflow transforms propo...

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 Document Extraction, Multimodal AI use case.