Find the Reddit subs where your topic actually lives

How founders use this

• Find where your future users are. Search the topic your product solves. The top 2-3 subs are where the high-intent questions live.
• Validate a niche. Compare the post count and engagement across related subs. Bigger sub + low competition topic = real distribution.
• See what people actually post. Each entry shows the top post from that sub, so you read real-threads-not-marketing, not just sub stats.

Questions

Is this tool really free?

Yes. No login, no account, no API key. We hit the public Reddit search endpoint and cache results at the edge for ten minutes.

How are the subreddits ranked?

By signal — a blend of post count, total score, and total comments from the last year. The most-active subs for your topic rise to the top.

Why not just use Reddit's subreddit search?

Reddit's native search shows results one post at a time. This tool groups posts by subreddit, ranks the subs, and shows you the top post from each, so you can spot the right home for your topic in seconds.

What can I do with the results?

Pick the top 2-3 subs, then run the full OpenCorp research on your product to surface the exact threads in those subs where your future users are most active.