Generate startup ideas from Reddit posts using Gemini AI and Google Sheets

Jayraj Pamnani

1732 views

2/3/2026

AI Web Scraping Content Analysis Perplexity AI Summarization

Official Page

This workflow contains community nodes that are only compatible with the self-hosted version of n8n.

Workflow Description: Startup Idea Finder (n8n)

What This Workflow Does:

This n8n workflow helps entrepreneurs discover startup ideas by automatically scraping top posts from multiple subreddits that often discuss unmet needs or problems (e.g., posts containing phrases like “Why is there no tool that”, “I wish there was an app for”, “someone should make”, etc.). The workflow extracts key information from these posts and sends it to Google’s Gemini 1.5 Flash-8b AI model, which analyzes the problem and suggests possible solutions or startup ideas. All relevant data and AI-generated insights are then saved to a Google Sheet for easy review and tracking.

How It Works (Step-by-Step)

1. Manual Trigger: The workflow starts with a manual trigger. 2. Reddit Scraping: It queries multiple subreddits for top posts matching specific keywords that indicate a problem or unmet need. 3. Merge & Edit Fields: The results are merged and filtered to keep only the necessary fields: title, selftext, ups, created, and url. 4. AI Analysis: The filtered post data is sent to the Gemini 1.5 Flash-8b model with a prompt asking for:

An explanation of the core problem,
Whether existing solutions exist,
A new startup idea if not,
The target user,
An implementation overview.

5. Google Sheets Logging: Both the original post data and the AI’s output are appended as a new row in a Google Sheet for future reference.

APIs & Credentials Needed

To use this workflow, you must set up the following credentials in your n8n instance:

Reddit API: For scraping subreddit posts.
Google Gemini (PaLM) API: For AI-powered analysis and idea generation.
Google Sheets API: For saving results to your spreadsheet.

Google Sheets Setup Before running the workflow, create a Google Sheet with the following columns (in this order): title, selftext, ups, created, url, output

The workflow will automatically append new rows with the scraped post data and the AI-generated output.

Summary

This workflow is a powerful tool for anyone looking to systematically discover and analyze real-world problems discussed online, and to generate actionable startup ideas using AI. Just set up your credentials, prepare your Google Sheet, and you’re ready to start finding your next big idea!

Generate Startup Ideas from Reddit Posts using Gemini AI and Google Sheets

This n8n workflow automates the process of extracting potential startup ideas from Reddit posts, leveraging Google's Gemini AI for idea generation, and then storing these ideas in a Google Sheet. It simplifies the discovery of innovative concepts by analyzing popular discussions on Reddit.

What it does

Manual Trigger: Initiates the workflow upon manual execution.
Reddit Post Retrieval: Fetches a specified number of "hot" posts from a chosen subreddit (e.g., "r/Entrepreneur").
AI Agent (Google Gemini): Processes each Reddit post using a Google Gemini Chat Model. It's configured to act as a "Startup Idea Generator" and analyzes the post content to brainstorm potential startup ideas.
Edit Fields (Set): Transforms the output from the AI Agent, extracting the generated startup idea and the original Reddit post's title and URL.
Google Sheets Appending: Appends the extracted startup idea, Reddit post title, and URL as a new row in a designated Google Sheet.
Merge: (Though not actively connected in the provided JSON, this node is present and typically used for combining data streams. In this specific workflow, it's not utilized for data flow but might be a leftover or intended for future expansion.)

Prerequisites/Requirements

n8n Instance: A running n8n instance.
Reddit Account: A Reddit account for API access. You'll need to create a Reddit OAuth2 app to get Client ID and Client Secret for n8n credentials.
Google Account: A Google account with access to Google Sheets.
Google Gemini API Key: An API key for Google Gemini (part of Google Cloud's Vertex AI or similar offerings). You'll need to configure this as a credential in n8n for the Google Gemini Chat Model.

Setup/Usage

Import the Workflow:
- Save the provided JSON content as a .json file.
- In your n8n instance, go to "Workflows" and click "New".
- Click the "Import" button (cloud icon) and upload the .json file.
Configure Credentials:
- Reddit Node: Click on the "Reddit" node and configure your Reddit OAuth2 credentials.
- Google Gemini Chat Model Node: Click on the "Google Gemini Chat Model" node and configure your Google Gemini API Key credentials.
- Google Sheets Node: Click on the "Google Sheets" node and configure your Google account credentials (OAuth2).
Customize Workflow Nodes:
- Reddit Node:
  - Specify the Subreddit (e.g., Entrepreneur).
  - Set the Limit for the number of posts to fetch.
  - Choose the Sort order (e.g., Hot).
- AI Agent Node:
  - Review the System Message and User Message to ensure the prompt for generating startup ideas aligns with your needs. The current configuration acts as a "Startup Idea Generator" and takes the Reddit post title and selftext as input.
  - Ensure the Model is set to your configured Google Gemini Chat Model.
- Google Sheets Node:
  - Enter the Spreadsheet ID of your target Google Sheet.
  - Specify the Sheet Name where the data will be appended.
  - Ensure the Operation is set to Append Row.
  - Verify the Values mapping to correctly insert the startupIdea, redditPostTitle, and redditPostUrl into the correct columns of your sheet.
Activate and Execute:
- Enable the workflow by toggling the "Active" switch in the top right corner.
- Click "Execute Workflow" on the "Manual Trigger" node to run the workflow manually and test it.
- Verify that new rows are added to your Google Sheet with the generated startup ideas.

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