Find the subreddits where a topic is discussed: enter a keyword to see which communities Google surfaces for it, with their ranking threads and estimated traffic, or name a subreddit to find the communities that show up for the same searches. Google's view of Reddit; nothing connects to your account.
Debug: upstream API calls (click to expand)
How it works
Reddit has more than 100,000 active communities and no public directory that says where a topic lives. Google does. For most product, hobby, and how-to searches it now ranks Reddit threads, and the communities those threads belong to are, in practice, the subreddits for that topic. The Subreddit Finder reads that signal.
- By topic: a live Google search limited to reddit.com for your keyword and country, grouped by community. Each subreddit shows how many of its threads rank, their combined estimated monthly Google traffic, the best rank any of them holds, and the best-ranked thread as a sample. The full thread list, with per-thread traffic and keywords, is one click away in the Reddit Thread Finder. It is the same search, so there is no extra lookup.
- Similar to a subreddit: we take the seed community's top Google keywords and run a Reddit-only search for up to four of them. The other communities that appear are ranked by how many of those keywords they share ("Keywords matched"), then by ranking threads and traffic. It measures shared search results, not shared members.
- Traffic is estimated from each thread's ranking keywords, positions, and Google's search volumes. It counts organic Google visits only. Member counts and activity are not available from Google data.
A topic search uses one SERP lookup and a similarity search up to four, from a daily allowance shared with our other SERP tools. Every plan has a cap, and paid plans get higher ones. Results can be shared, exported, or copied, and stay in Recent searches for 30 days. Nothing connects to Reddit or your account.
What the columns mean
- Subreddit
- The community, linked to reddit.com. In similarity mode the seed community itself is left out.
- Threads ranking
- How many of the community's threads appear in the Google results for the search, or across the seed keywords in similarity mode.
- Est. traffic
- The combined estimated monthly Google visits to those threads. Organic Google visits only.
- Best rank
- The highest Google position any of the community's threads holds for the search. Rank 1 is the first Reddit result.
- Keywords matched (similarity mode)
- How many of the seed subreddit's top keywords this community appeared for. 4 of 4 means it shows up for every one.
- Sample thread
- The community's best-ranked thread for the search, with a link, so you can read how the community talks about the topic.
Frequently asked questions
How does the subreddit finder work?
In "By topic" mode it runs a Google search for your keyword limited to reddit.com and groups the Reddit results by community. You see which subreddits Google surfaces for the topic, how many of their threads rank, the estimated Google traffic those threads get, and the best rank any of them holds. In "Similar to a subreddit" mode it takes the subreddit's own top Google keywords and runs the same search for each. It then lists the other communities that appear, ranked by how many of the keywords they share. It is Google's view of Reddit. Nothing connects to Reddit itself.
Why are these the "right" subreddits for a topic?
Because they are the communities Google already sends people to for that topic. A subreddit whose threads rank for it is active on it, is read by outsiders, and is where a competitor's customers land. Member counts and posting activity are not available from Google data, so the tool ranks communities by ranking threads and estimated traffic instead. Open the sample thread to get a feel for the community before posting.
What does "similar to a subreddit" measure?
Whether two communities show up for the same searches. The tool reads the top Google keywords the seed subreddit's front page ranks for, skipping queries that just name Reddit. It runs a Reddit-only Google search for up to four of them and counts which other communities appear. A community matched on all four keywords is discussed alongside the seed for the same searches. One matched once may be a niche neighbour. It is not member overlap, which no public data provides any more.
What do the traffic numbers mean?
The estimated monthly Google visits to that community's ranking threads for this search. It is computed from each thread's ranking keywords, positions, and search volumes. It counts organic Google visits only, so real readership through Reddit's feed, app, and search is higher. The Reddit Thread Finder shows the per-thread figures and the keywords behind them.
Can I see the threads themselves?
Yes. Each row shows the best-ranked thread as a sample. The "See all threads" link opens the same search in the Reddit Thread Finder, where every thread is listed with its traffic and a Keywords button. Both tools share the search, so it costs nothing extra.
Which country should I pick?
The country of the searchers you care about. Google's Reddit results differ by country, above all for shopping and local topics, and the traffic estimates follow the country. The tool supports the United States, United Kingdom, Canada, Australia, India, New Zealand, and South Africa, and remembers your pick.
Does a subreddit that ranks on Google welcome new posters?
Not always. Ranking on Google means the community is read, not that it allows self-promotion or link posts. Many of the most-read subreddits are the strictest. Read the community rules and its recent posts before posting, and expect to take part before you share anything of your own.
Is the subreddit finder free, and how many searches do I get?
It is free with no signup. A topic search uses one SERP lookup. A similarity search uses up to four, one per seed keyword. Both come from a daily allowance shared with our other SERP tools. Every plan has a cap, and paid plans get higher caps and deeper results. Results are kept for 30 days so you can share the link.