Subreddit Finder: How to Find the Right Subreddits for Your Niche
Compare seven tools to find relevant subreddits and Reddit threads. Learn how to check audience fit, recent activity, community rules, and useful results.
Finding a subreddit is easy; deciding whether it contains the audience you want to understand takes more work. A useful finder should help you reach actual communities and discussions that you can inspect.
This comparison covers six options: Reddit's own community search, Okara, Redreach, Scaloom, LLMrefs, and Mangools. Some suggest communities directly. Others find individual threads, which you can use to discover the communities behind them.
Comparison method: Product descriptions are based on official pages reviewed on September 24, 2026. We have not run a comparative accuracy test. Okara publishes this guide and is included below. The worked exercise is illustrative, not a report of tool-generated results.
Compare community finders and thread finders
| Tool | What to use it for | Output to inspect | Important distinction |
|---|---|---|---|
| Reddit community search | A free first pass at candidate communities | Member counts, descriptions and recent posts | No intent signal; you judge fit yourself |
| Okara | Ongoing discussion discovery and reply preparation | Threads, rule summaries, and reply drafts | Broader marketing workflow |
| Redreach | Product-relevant discussion discovery | Matching posts and suggested replies | Lead-discovery focus |
| Scaloom | Community research within a Reddit marketing workflow | Discovery and community-checking outputs | Review the specific workflow before enabling actions |
| LLMrefs | Keyword-based thread discovery | Relevant, unlocked posts | Thread finder rather than a complete community audit |
| Mangools | Find threads appearing in Google results | Keywords and associated Reddit discussions | Search visibility does not prove audience fit |
Official sources and selection advice follow in each section.
1. Reddit's own community search: the free starting point
Search your topic on Reddit and switch the results to Communities. You'll see member counts and a short description for each subreddit. Open the top 5 and check three things before you add them to your list: posts in the last 24 hours (is it active?), the rules in the sidebar (is self-promotion allowed, and how?), and whether the top posts are questions you could genuinely answer.
2. Okara: ongoing discovery and reply preparation
Okara's Reddit Agent surfaces discussions relevant to your product, summarizes community rules, and prepares replies for review. Inspecting the subreddits behind those discussions can help you decide where to spend time.
Consider it when: You want discovery to become a regular marketing workflow, rather than collecting a one-off list.
Cost: The Reddit Agent is on the Pro plan, $249/month ($208 billed annually). The free plan includes the website analysis and marketing strategy.
Check: Whether the discussions reflect your actual buyer and whether the proposed reply contributes something useful. A rule summary is a starting point; read the current rules yourself.
3. Redreach: discussions related to your product
Redreach uses your website and competitor context to find relevant Reddit discussions. Its documented features include monitoring and AI-guided replies.
Consider it when: Your research starts with a product category or competitor, and individual discussions are more useful than a directory of subreddit names.
Check: The reason each thread matches, its date, and whether the person is asking a question your team can answer. Review the pricing and allowances for the exact features you need on the vendor's site.
Treat discovery separately from outreach. A relevant discussion is not an invitation to send someone a sales message.
4. Scaloom: community research within a marketing platform
Scaloom lists subreddit discovery and tools for reviewing community rules and recent posting patterns as part of its Reddit marketing offering.
Consider it when: You want to evaluate discovery together with preparation for a specific community.
Check: Which features are included in the plan and whether the output links to evidence you can inspect. If a checker flags a restriction, read the original rule and relevant pinned post.
Keep research and publication decisions separate. An automated eligibility assessment cannot guarantee that moderators will accept a post.
5. LLMrefs: discover individual discussions
LLMrefs' Reddit Threads Finder is a free keyword-based tool for finding relevant, unlocked Reddit posts.
Consider it when: You want discussions to investigate and are willing to assess the communities behind them yourself.
Check: Whether the post is current enough for your purpose and whether the subreddit regularly discusses the same topic. One matching thread does not establish an ongoing audience.
Do not infer that every result has been cited by an AI engine merely because the tool is offered by an AI-visibility company.
6. Mangools: discover communities through Google-visible threads
Mangools' Reddit Threads Finder helps find discussions associated with Google search results for relevant keywords. The free finder can support topic research; the broader SEO toolkit is a separate offering.
Consider it when: You want to understand the questions people encounter through search.
Check: Whether several relevant threads point to the same community. Then inspect that community directly. Search visibility and membership size do not tell you whether its readers match your customers.
Find subreddits with Google (free)
Google often finds better communities than Reddit's own search, because it ranks threads by how useful they were:
site:reddit.com/r/ "your keyword"finds threads about your topic. Look at which subreddits keep appearing.site:reddit.com/r/ "alternative to [competitor]"finds communities where people compare tools in your category.site:reddit.com/r/ "recommend" "[your category]"finds communities where people ask for recommendations.
Use Tools → Past year in Google to skip dead threads.
A practical way to build your shortlist
The following example shows how to evaluate results. It is not an actual run of any tool above.
Suppose you sell scheduling software to independent consultants. “Find business subreddits” is too broad. Instead, describe the buyer and the problem:
Find communities where independent consultants discuss appointment scheduling, missed meetings, and managing client bookings. Separate communities for practitioners from communities mainly used for product promotion. Provide source links and mark anything you cannot verify.
Search the same problem phrases directly on Reddit as a baseline. Its search supports community filters and Boolean operators, and Reddit also documents an AI-powered option. There is no basis here for claiming that every third-party AI finder is better than native search. Reddit search features.
For each result, fill in this record:
| Field | What to record |
|---|---|
| Community | Name and working URL |
| Audience evidence | Links to discussions showing the people you want to understand |
| Problem evidence | Examples of the problem they describe in their own words |
| Activity | Date of the recent relevant discussions you inspected |
| Participation rules | Applicable rule and pinned-thread links |
| Decision | Research only, participate where permitted, or reject |
| Reason | One sentence explaining that decision |
An illustrative decision: a large business community might be useful for learning about scheduling problems but prohibit product promotion. Keep it as a research source. A smaller community might be more relevant to the buyer but have little recent discussion; monitor it without making it your main channel.
Do not force every result into a publishing plan. “Useful for research only” is a valid outcome.
How to compare the quality of two finders
Use the same description in both tools and inspect the same number of suggestions. Count working links, genuine audience matches, and results that add something beyond your manual search. Record the review time.
This tells you whether a tool improves your process. The number of subreddits returned, an unexplained relevance score, or an AI label does not establish that on its own.
For every tool mapped to the job it does, from finding subreddits to scheduling posts, see our guide to the best Reddit marketing tools. For the full plan, including a 30-day schedule, read our Reddit marketing strategy guide. GummySearch shuts down and deletes all user data on December 1, 2026. We mapped each of its features to a replacement in GummySearch alternatives.
Common questions
How do I find subreddits for my niche?
Describe the audience, problem, and purpose of your research. Generate candidates with a finder or native search, then verify them using real discussions and current community information.
Is the biggest subreddit the best place to start?
Not necessarily. Evaluate how often the relevant audience discusses your problem and whether you can contribute appropriately. Membership size alone is a weak selection criterion.
How do I know whether promotion is allowed?
Read the community rules and pinned posts. Check whether product mentions belong only in a designated thread. When unclear, ask moderators before posting. A tool's recommendation does not override community rules.
What should I do after choosing communities?
Set up a small monitoring routine and learn from the discussions before deciding when to respond. Our Reddit keyword monitoring guide covers alerts; our reply automation comparison explains the next step.
If you want to publish an original contribution, use the Reddit post automation guide to distinguish drafting from scheduling and submission.