Free tool
Subreddit Finder for Idea Validation
Enter a product idea or niche and see which public subreddits already talk about the problem — so you validate demand before you build.
Paste a product idea and get public subreddits where people already discuss the problem — sized for idea validation, not spam.
- Product idea or niche
Find subreddits
Example
Relevance · members · public communities
12
Subreddits matched
Best for Validation
How it works
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1
Describe the idea
Enter the product or the problem it solves. Example niches sit under the search box.
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2
Press find subreddits
We search public Reddit communities and rank them for relevance and size.
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3
Read the result
You get subreddits matched, plus member counts, community descriptions.
How it works
Enter a product idea or niche. We match it against a curated catalog of public communities and rank by relevance and size so you can validate demand before you build.
What this finds
Public communities sized for idea validation: keyword fit plus enough members to matter, without dumping you into megasubreddits that bury niche posts.
How to use it for idea validation
Name the problem, not your brand. “AI note-taking for students” beats “NotaAI” every time.
Open the top matches and scan the last week of posts. Complaints, workaround threads and “is there a tool for…” questions are demand signals. Silence is a signal too.
What this does not do
- Matches against a curated catalog of public founder-relevant subreddits. It will not surface every community on Reddit.
- Member counts are approximate snapshots used for ranking, not live Reddit stats.
- Always read recent posts and subreddit rules before you participate — size is not the same as engagement.