Reddit-Powered Curated Newsletters via GPT and Gmail

Reddit is a goldmine of insights, discussions, and community wisdom. But let's face it, keeping up with multiple subreddits while trying to extract meaningful content for your audience is like drinking from a fire hose. You're drowning in threads, comments, and endless scrolling while your newsletter subscribers wait for curated, valuable content.

This n8n workflow solves that exact problem by creating an intelligent automation system that monitors Reddit discussions, filters content by relevance, analyzes conversations using AI, and delivers polished newsletters straight to your inbox. Think of it as having a dedicated research assistant who never sleeps and always finds the best content.

What You'll Need to Get Started

Before diving into this workflow, make sure you have these essential components ready:

• Reddit API Access: You'll need Reddit OAuth2 credentials to fetch posts and comments
• OpenAI API Key: Required for GPT-4o-mini integration to analyze and generate content
• Gmail Account: Set up Gmail OAuth2 for sending newsletters
• n8n Instance: Either cloud or self-hosted version with access to the required nodes

Key Components of This Workflow

This automation workflow leverages several powerful n8n nodes working in perfect harmony:

• Reddit Node: Fetches posts and comments from specified subreddits
• OpenAI Node: Processes content through GPT for filtering and newsletter creation
• Code Node: Handles data transformation and ranking algorithms
• Gmail Node: Delivers the final newsletter to recipients
• Merge Node: Combines post data with comment insights
• Split in Batches Node: Manages bulk processing efficiently

Step 1: Collect and Rank Reddit Content

The workflow starts by connecting to Reddit and pulling the 20 hottest posts from your target subreddit. In this case, we're monitoring the "microsaas" community, but you can easily switch to any subreddit that matches your niche.

Here's where it gets smart: instead of processing every single post, the system ranks them based on upvotes, comment count, and recency. A custom JavaScript function selects only the top 10 performers, ensuring you're working with content that has already proven its worth to the community.

Step 2: Filter Content by Topic Relevance

Not every popular post deserves space in your newsletter. The workflow sets a topic of interest and uses GPT-4o-mini to evaluate whether each post genuinely relates to your focus area. This AI-powered filtering step is crucial because it eliminates false positives and ensures your newsletter stays on brand.

The system adds a "topic_of_interest" field to each post, marking it true or false. Only the true candidates move forward in the pipeline, saving processing time and maintaining content quality.

Step 3: Gather Community Insights

Here's where the magic happens. For each approved post, the workflow fetches up to 5 top comments and runs them through a sophisticated analysis process. The system flattens nested Reddit comment structures into a clean, readable format that preserves valuable context and user attributions.

A custom JavaScript function handles this complex data transformation, ensuring that reply chains, user information, and permalinks remain intact for proper citation in the final newsletter.

Step 4: Generate AI-Powered Summaries

The workflow combines post content with community comments and feeds everything to GPT for intelligent analysis. The AI extracts key insights, identifies valuable lessons, and creates concise summaries that capture the essence of each discussion.

This step outputs structured data including main post summaries, comment insights with proper attribution, and a list of key learnings that readers can immediately apply to their own projects.

Step 5: Create and Distribute Professional Newsletters

The final step transforms raw insights into a polished HTML newsletter. The AI newsletter generator follows specific editorial guidelines to create engaging content with catchy headlines, conversational tone, and proper formatting for email clients.

The system automatically includes Reddit usernames and links for attribution, structures content for easy skimming, and maintains consistent formatting across all newsletter sections. Once generated, Gmail integration handles delivery to your subscriber list.

Real-World Applications and Benefits

This workflow opens up numerous possibilities for content creators and marketers:

• Industry Monitoring: Stay updated on trends in your niche without manual research
• Content Curation: Transform community discussions into valuable newsletters for your audience
• Competitive Intelligence: Track conversations about competitors and industry changes
• Lead Generation: Identify potential customers discussing problems your product solves
• Community Building: Share curated insights that position you as a thought leader

Why This Workflow Works So Well

The brilliance of this automation lies in its layered intelligence. Rather than simply scraping and forwarding Reddit content, it applies multiple filters and transformations that add genuine value. The AI doesn't just summarize; it analyzes, contextualizes, and presents information in a format that busy professionals can quickly digest.

The workflow also respects Reddit's community guidelines by properly attributing content and linking back to original discussions, ensuring ethical content curation that benefits both your audience and the original creators.

Building this type of intelligent content automation used to require teams of developers and expensive infrastructure. With n8n and AI integration, you can deploy sophisticated content curation systems in hours rather than months. Your subscribers get valuable, timely insights while you reclaim countless hours previously spent on manual research and content creation.