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Reddit lead finder: Automated prospecting with GPT-4, Supabase and Gmail alerts

BlueProBluePro
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2/3/2026
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This workflow monitors targeted subreddits for potential sales leads using Reddit’s API, AI content analysis, Supabase, and Google Sheets.

It is built specifically to discover posts from Reddit users who may benefit from a particular product or service. It can be easily customized for any market.

🔍 Features

  • Targeted Subreddit Monitoring:
    Searches multiple niche subreddits like smallbusiness, startup, sweatystartup, etc., using relevant keywords.

  • AI-Powered Relevance Scoring:
    Uses OpenAI GPT to analyze each post and determine if it’s written by someone who might benefit from your product, returning a simple “yes” or “no.”

  • Duplicate Lead Filtering with Supabase:
    Ensures you don’t email the same lead more than once by storing already-processed Reddit post IDs in a Supabase table.

  • Content Filtering:
    Filters out posts with no body text or no upvotes to ensure only high-quality content is processed.

  • Lead Storage in Google Sheets:
    Saves qualified leads into a connected Google Sheet with key data (URL, post content, subreddit, and timestamp).

  • Email Digest Alerts:
    Compiles relevant leads and sends a daily digest of matched posts to your team’s inbox for review or outreach.

  • Manual or Scheduled Trigger:
    Can be manually triggered or automatically scheduled (via the built-in Schedule Trigger node).

⚙️ Tech Stack

  • Reddit API – For post discovery
  • OpenAI Chat Model – For AI-based relevance filtering
  • Supabase – For lead de-duplication
  • Google Sheets – For storing lead details
  • Gmail API – For sending email alerts

🔧 Customization Tips

  • Adjust Audience: Modify the subreddits and keywords in the initial Code node to match your market.
  • Change the AI Prompt: Customize the prompt in the “Analysis Content by AI” node to describe your product or service.
  • Search Comments Instead: To monitor comments instead of posts, change type=link to type=comment in the Reddit Search node.
  • Change Email Recipients: Edit the Gmail node to direct leads to a different email address or format.

n8n Reddit Lead Finder: Automated Prospecting with GPT-4, Supabase, and Gmail Alerts

This n8n workflow automates the process of finding potential leads on Reddit, enriching them with AI, storing them in Supabase, and sending out email notifications. It combines a Reddit scraper, an AI agent for lead qualification, a Supabase database for storage, and Gmail for alerts.

What it does

This workflow streamlines your lead generation and qualification by:

  1. Triggering the Workflow: The workflow can be executed manually or on a scheduled basis.
  2. Fetching Reddit Posts: It connects to Reddit to retrieve posts, likely based on specific criteria (e.g., keywords, subreddits).
  3. Processing Reddit Data: A "Code" node is used to process the data retrieved from Reddit, potentially extracting relevant information or reformatting it.
  4. Looping Through Items: The "Loop Over Items" node processes each Reddit post individually.
  5. AI-Powered Lead Qualification: An "AI Agent" node, powered by an "OpenAI Chat Model", analyzes each Reddit post (and potentially its comments) to identify potential leads and qualify them based on predefined criteria. This likely involves using GPT-4 for natural language understanding and decision-making.
  6. Conditional Logic: An "If" node evaluates the output from the AI Agent. It likely checks if a post is identified as a valid lead.
  7. Storing Qualified Leads: If a post is deemed a qualified lead, it is inserted or updated in a "Supabase" database.
  8. Sending Email Alerts: For each qualified lead, a "Gmail" node sends an email notification, likely containing details about the lead.
  9. Waiting (Optional): A "Wait" node is included, which can be used to introduce a delay between processing items or sending alerts, useful for rate limiting or pacing.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Instance: A running instance of n8n.
  • Reddit Account & API Credentials: To fetch data from Reddit.
  • OpenAI API Key: For the "OpenAI Chat Model" used by the "AI Agent" node (likely GPT-4).
  • Supabase Account & Credentials: To store your leads in a Supabase database.
  • Gmail Account & Credentials: To send email notifications.

Setup/Usage

  1. Import the Workflow: Download the JSON provided and import it into your n8n instance.
  2. Configure Credentials:
    • Set up your Reddit credentials for the "Reddit" node.
    • Set up your OpenAI credentials for the "OpenAI Chat Model" node.
    • Set up your Supabase credentials for the "Supabase" node, ensuring you have a table configured to store your lead data.
    • Set up your Gmail credentials for the "Gmail" node.
  3. Customize Nodes:
    • Reddit Node: Configure the subreddits, keywords, or other parameters to fetch relevant posts.
    • Code Node: Review and adjust the JavaScript code to correctly parse and prepare the Reddit data for the AI agent.
    • AI Agent Node: Define the prompt and tools for the AI agent to accurately identify and qualify leads based on your specific criteria. This is crucial for effective lead generation.
    • If Node: Adjust the conditions to match your lead qualification logic based on the AI agent's output.
    • Supabase Node: Ensure the operation and data mapping are correct for your Supabase table schema.
    • Gmail Node: Customize the recipient, subject, and body of the email alerts to include relevant lead information.
    • Schedule Trigger: If you want the workflow to run automatically, configure the schedule (e.g., daily, hourly).
  4. Activate the Workflow: Once configured, activate the workflow to start automating your Reddit lead prospecting. You can also manually execute it for testing.

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