Why are some subreddits with my keyword not listed?

Reddit's search ranks results by relevance + size. Tiny or dormant subreddits may not appear in the top 20 even if their name matches.

What does "active recently" mean?

There was at least one post in the subreddit in the last 24 hours.

Last updated: May 2026

Subreddit finder — discover communities for any topic

Enter any keyword and we'll surface the top-matching subreddits, sorted by subscriber count. Useful for content placement, audience research, and finding where your category gets discussed.

How this works

We query Reddit's subreddit search index for your keyword and return the top 20 matches by subscriber count. For the top 5, we check whether they had a post in the last 24 hours and flag them as "active".

When to use it

Use this before adding a new keyword to RedNudge, when expanding into a new vertical, or when you're looking for where your competitors are being discussed.

FAQ

Why are some subreddits with my keyword not listed?
Reddit's search ranks results by relevance + size. Tiny or dormant subreddits may not appear in the top 20 even if their name matches.
What does "active recently" mean?
There was at least one post in the subreddit in the last 24 hours.