Tools›Reddit›Find Subreddit Overlap
Find Subreddit Overlap
Understand where the same users actively participate to map broader audience interests beyond a single subreddit.
How it works
Subreddit Selection
Enter one or two subreddit names to analyze shared audience behavior across multiple communities using public participation signals.
User Activity Collection
The tool collects active users from recent posts and comments within each subreddit for overlap comparison.
Overlap Detection
Shared users appearing across both subreddits are identified to determine audience intersection strength between communities.
Ranking Logic
Overlapping subreddits are ranked based on shared user frequency and participation intensity across analyzed communities.
Paid Analysis Layer
Advanced processing calculates overlap percentage and derives deeper insights into shared audience concentration.
Result Presentation
Overlap results are displayed as ranked lists and visual summaries for quick interpretation and decision making.
Expected Results
Overlapping Communities
A list of subreddits sharing common active users with the selected subreddit based on participation overlap signals.
Shared Audience Signals
Indicators showing how frequently users participate across multiple subreddits within the same interest space.
Overlap Percentage
Calculated percentage representing how much of the audience is shared between compared subreddit communities.
Visual Overlap Graph
Graphical visualization illustrating the relationship and audience intersection between selected subreddits.
Crossposting Targets
Suggested subreddits where shared audience presence indicates higher potential success for crossposting content.
Public Data Only
All overlap calculations rely exclusively on publicly visible posts and comments without accessing private user information.
Use Cases
Audience Research
Understand where the same users actively participate to map broader audience interests beyond a single subreddit.
Crossposting Strategy
Identify optimal subreddits for crossposting content based on shared audience behavior patterns.
Community Expansion
Discover adjacent communities with overlapping audiences to expand reach without targeting unrelated subreddits.
Niche Mapping
Map clusters of related subreddits connected through shared user participation and topic alignment.
Marketing Planning
Plan outreach campaigns using overlap insights to focus efforts on communities with demonstrated audience crossover.
Competitive Discovery
Identify competing or adjacent communities attracting similar audiences for comparative analysis.
Frequently Asked Questions
What subreddit information do I need to provide to calculate audience overlap using this tool?
You provide the names of two or more subreddits. The tool uses public participation data to estimate how much their audiences overlap.
Does the tool expose individual Reddit user identities during overlap analysis or only aggregated audience data?
Only aggregated audience data is used and shown. Individual usernames or identities are not exposed in overlap results.
Can I compare more than two subreddits simultaneously to analyze audience overlap across multiple communities?
Depending on the tool, you may be able to compare multiple subreddits. Check the input options on the page for supported comparisons.
Which overlap insights are included for free and which require a paid subscription plan?
Basic overlap metrics are typically free. Deeper insights or higher limits may require a paid plan; the tool or pricing page will specify.
How recent is the user participation data used to calculate subreddit overlap results?
Data is based on recent public Reddit activity. Each run uses the latest available participation data at the time of the request.
Related Tools
Curated Subreddits
Browse curated Reddit communities by niche with subscriber counts and descriptions.