Reddit Brand Engagement with AI Comment Generation and Slack Notifications

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Built by Jitesh Dugar Jitesh Dugar
Created on June 05, 2026

Description

What This Does
Automatically finds relevant Reddit posts where your brand can add value, generates helpful AI comments, and sends the best opportunities to your Slack channel for review.

Setup Requirements
Reddit API credentials
OpenAI API key
Slack webhook URL

Quick Setup

Reddit API
Create app at reddit.com/prefs/apps (select "script" type)
Add client ID and secret to n8n credentials

Configure Subreddits
Edit the workflow to monitor subreddits relevant to your business:
entrepreneur, startups, smallbusiness, [your_niche]

AI Prompt Setup
Customize the OpenAI node with your brand context:
You're helping in [subreddit] discussions. When relevant, mention how [your_product] solves similar problems. Be helpful first, promotional second.

Slack Integration
Add your webhook URL to get notifications with:
Post title and link
AI-generated comment
Engagement score (1-10)

Key Features
Smart Filtering**: AI evaluates if a post is worth engaging with
Brand-Aware Comments**: Generated responses stay on-brand and helpful
Team Review**: All opportunities go to Slack before posting
Multiple Subreddits**: Monitor several communities simultaneously

Customization Tips

Adjust AI Scoring - Modify what makes a "good" opportunity:
Post engagement level
Relevance to your product
Tone of the discussion

Comment Templates - Set different styles for different subreddits:
Technical advice for developer communities
Business insights for entrepreneur groups
User experience for product discussions

Best Practices
Start with 2-3 subreddits to test effectiveness
Review and approve comments in Slack before posting
Follow Reddit's 90/10 rule (90% helpful content, 10% self-promotion)
Adjust the AI prompt based on what works in your communities

Why Use This
Saves hours of manual Reddit browsing
Maintains consistent brand voice
Never miss relevant conversations
Team can review before engaging publicly

Nodes Used (6)

AI Agent
@n8n/n8n-nodes-langchain.agent
Code
n8n-nodes-base.code
OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi
Reddit
n8n-nodes-base.reddit
Slack
n8n-nodes-base.slack
Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured