Free AI tool, no signup
Describe your product in one sentence, pick a category, get 12 subreddits where your buyers already hang out.
We will find the right communities
Finds the most relevant subreddits based on your specific niche and product.
Know which subreddits welcome your content and which ones will ban you.
Your results will appear here
Discover Your Audience
Describe your product and we will find the subreddits where your target users already hang out.
A shortlist, not a green light. Check each room on Reddit, then run your top picks through the Subreddits Analyzer.
Reddit in numbers, checked October 12, 2026
More rooms every year. Picking the right ten by hand is slow work.
Weekly actives
Our test
01Describe it in one sentence. Who it helps and the pain it solves.
02Let the finder match it. 12 active communities, ranked by fit.
03Confirm each one on Reddit. Rules, weekly visitors, weekly contributions, top posts.Goal: 5 to 10 focused subreddits. A clear self-promo policy beats one giant room full of passive readers. Next, analyze each subreddit's activity and use the Reddit growth strategy playbook to turn the shortlist into steady participation.
Methodology
Three steps take seconds. The fourth one is yours.
Step 01Name the user, the job and the pain, then pick a category.
10+ charactersStep 02It proposes subreddits where that user already talks about the problem.
12 matches
Step 03Relevance 1 to 10, self-promo tolerance, a posting window in ET and a tip.
Sorted by fitStep 04Open each room, read the rules, check weekly activity. Reddit has the final word.
Your callPottery enthusiasts are highly likely to appreciate handmade mugs, glazing, firing, and small-batch production.
Real output from the finder for a handmade mug shop, run October 12, 2026.
| Term | What it means |
|---|---|
| Subreddit | A topic community with the prefix r/, its own mods, rules and culture. |
| Weekly visitors | Unique visitors in the past 7 days on a 28-day rolling average. Replaces total members. |
| Weekly contributions | Posts and comments in the past 7 days, removed content not counted. |
| Karma | Grows with upvotes. Some rooms require a minimum before you can post. |
| Self-promotion rule | Limits posts you have a stake in. Some rooms use the 10% rule. |
| AutoModerator | Reddit's mod bot. Posts vanishing in seconds usually means it filtered you. |
| Niche subreddit | A narrow, pre-qualified audience with less competition. |
| Subreddit finder | A tool that turns a topic or product into matching communities. |
Worked examples, run October 12, 2026
A SaaS app, a pottery shop and a developer tool. Top six matches each, straight from the tool.
SaaS example“Invoicing app for freelance designers that sends automatic payment reminders and tracks late invoices”
Ecommerce example“Handmade ceramic mugs and small-batch pottery sold through an online shop”
Developer tool example“Open source CLI that finds unused dependencies in JavaScript and TypeScript projects”
SaaS example: Best audience fit is strictest on promo. Answer questions there, share build stories in r/SaaS and r/indiehackers.
Ecommerce example: Hobby products get the friendliest list. Maker rooms rate Medium because finished-work photos are the content.
Developer tool example: The top four all rate Low. Lead with a technical write-up, the open source angle opens r/opensource and r/npm.
Sizes and ratings are the finder's AI estimates, not Reddit statistics.
Common starting points for six niches. Read each community's rules before posting.
| Niche | Starter subreddits |
|---|---|
| SaaS | r/SaaS, r/SideProject, r/Entrepreneur, r/EntrepreneurRideAlong |
| Ecommerce | r/ecommerce, r/shopify, r/FulfillmentByAmazon, r/dropship |
| Dev tools | r/webdev, r/programming, r/devops, r/javascript |
| Marketing | r/marketing, r/digital_marketing, r/SEO, r/GrowthHacking |
| Design | r/web_design, r/graphic_design, r/UI_Design, r/userexperience |
| Fitness | r/fitness, r/running, r/loseit, r/bodyweightfitness |
Generic lists only go so far. MediaFast and the finder above match your specific product, which surfaces the smaller rooms these lists miss.
Small, growing, still active
Smaller rooms give makers a fair hearing. Growth shows in activity long before it shows in size.
100K to 500K members54%of picks rated Medium self-promo (7 of 13)
Over 1M members0%of picks rated Medium self-promo (0 of 16)| Activity signal | Growing and active | Quiet or stalled |
|---|---|---|
| Weekly contributions vs visitors | Several contributions per 100 weekly visitors | Thousands of visitors, a handful of posts |
| Newest post in New | Under a few hours old | More than 3 days old |
| Top posts, past month | Recent posts with real comment threads | Top of the month is a repost or a meme |
| Moderator activity | Pinned posts, updated rules, mods replying | No pinned post, rules unchanged for years |
| Weekly threads | A showcase or 'what are you working on' thread | No sanctioned place to share your work |
| Creation date | A young room that already has daily posts | An old room that never took off |
Looking for growing hobby subreddits under 500k members active this month? Put your hobby and “smaller, active communities” into the finder above, then keep only the rooms that pass this board.
Finder vs the alternatives
Six ways to find subreddits in 2026, and which ones tell you the promo rules.
| Option | You give it | You get back | Promo guidance | Cost | Data freshness |
|---|---|---|---|---|---|
| This subreddit finderThis page | A product description and a category | 12 ranked subreddits with fit score, posting time and a tip | Yes, High, Medium or Low per subreddit | Free, no signup | AI estimates, verify on Reddit |
| Reddit search, Communities tab | A keyword | Communities whose name or description matches | None, you read each rule list | Free | Live |
| Reddit Answers | A question in plain words | An AI summary citing posts and the communities behind them | None | Free | Live |
| Map of Reddit | A subreddit name | Neighbor subreddits that share commenters | None | Free | Built from 2020 to 2021 comments |
| r/findareddit | A post describing what you want | Suggestions from other Redditors | None | Free | Live, replies can take hours |
| Paid finder tools | Keywords or a product URL | Lists plus keyword monitoring | Varies by tool | About $29 to $49 a month | Usually live |
Swipe to compare all 6 options
Paid tool prices from Simular's 2026 subreddit finder roundup, Map of Reddit data range from its GitHub repository. Checked October 12, 2026.
The best-known subreddit finder is closing after it could not reach a commercial license agreement for Reddit's Data API.
Nov 30, 2025 ended new signups, not the service. The official closure notice gives paid customers until Nov 30, 2026. Moving off it? The finder above covers “which subreddits fit my product” for free. Checked October 12, 2026.
Reddit's own search
Use Reddit's subreddit search to double-check the finder's list, then search inside each room before you post.
| Reddit tool | What it does | Best for | Source |
|---|---|---|---|
| Reddit search, Communities tab | Switch search results to Communities to see matching subreddits instead of posts. | A fast seed list from 3 to 5 keywords | How Reddit search works |
| Reddit Answers (Ask button) | AI search that cites posts and lists the communities behind them. English, Spanish, Brazilian Portuguese, Italian, French and German. | Seeing which rooms discuss a problem in depth | Reddit's AI search |
| Reddit Pro Trends | Track keywords and see where people talk about them, with volume and an AI summary. | Monitoring your brand, competitors and category | Reddit Pro Trends |
| Reddit Pro Links | Verified publishers see how their links spread and get community recommendations. Desktop only. | Publishers with existing links on Reddit | Reddit Pro Links |
Reddit Pro is open to eligible businesses in English-speaking countries.
Manual method
The manual version of what the finder does, plus the checks it cannot do for you.
Counts after the start are a typical example, not Reddit data. Your numbers depend on the niche.
Step 01Job title or hobby, main pain point, and the words they search for.
1 sharp sentence
Step 02Search 3 to 5 keywords and switch results to Communities.
Rooms that show up for several keywords
Step 03Many ban self-promotion, affiliate links or launch posts outright.
Rule-breakers crossed off
Step 04Sort by New. Posts every few hours is alive, days old is dead.
Dormant rooms removed
Step 05Look for a weekly showcase thread or check how past product posts fared.
Where you may share your work
Step 06Sort by Top, All Time. The top 20 show the format the room rewards.
Your post format
Step 07A small room of exact customers beats a giant room of passive readers.
5 to 10 focused rooms
Step 08Leave one helpful, non-promotional comment in your top 3 and watch the response.
Rooms for your rotationReddit's own search and community signals (The School of Digital Marketing, 4 min).
Expand your list
Once one community works, its neighbors usually work too.
Founders who found their subreddits
Real posts from founders using MediaFast to plan where and what to post on Reddit.
"Reddit has insane potential for founders. But most posts get removed. Most accounts get banned. Most strategies are guesswork. I've been using @mediafa_st to plan posts, find the right communities, and avoid bans."
"Should be $25k + $94 now. Just bought lifetime access"
"Things are going well mate thanks for you product. It helps me to step into reddit very intuitively!"
Reddit changed its stats
Reddit replaced total members and 'online now' with two weekly numbers. Use them to cut 12 results to 5.
Numbers are illustrative, check the real header on new Reddit or the app
Tools like MediaFast keep this scorecard for you across all your communities, so you are not re-checking rules and stats by hand every week.
| Check | Where to find it | Keep it if |
|---|---|---|
| Relevance (finder) | Relevance score in your results | 7 or higher out of 10 |
| Self-promo tolerance (finder) | Badge on each result | High or Medium, and the written rules agree |
| Weekly visitors | Community header, new Reddit or app | Big enough to be seen, focused enough to fit |
| Weekly contributions | Community header, new Reddit or app | People post and comment every day |
| Karma or age gate | Rules, or a removal after a test comment | Your account already clears it |
| Recent top posts | Sort by Top, past month | A few posts solve the problem you solve |
Decision framework
Run each result from the finder through these branches before it goes on your list.
Once a room clears the framework, a Reddit opportunity finder can surface live threads inside it worth joining now.
Promotion is allowed on Reddit. Spam is not. Here is where Reddit's help center draws the line.
Mostly links to your own business? Reddit says to think about how often you do it, or consider its self-serve ads.
The patterns behind most removed posts and zero-engagement launches.
| Mistake | What goes wrong | The fix |
|---|---|---|
| Targeting the biggest subreddit in the category | Going straight for the largest room in your niche | Start with focused rooms under 1M members0 of 16 over 1M rated better than Low |
| Skimming the self-promo rule | Only checking whether links are banned | Read every rule: links in comments only, weekly threads, karma minimums |
| Posting to 20 subreddits on day one | Mass-posting the same content for exposure, which Reddit names as spam | Start with 2 or 3 rooms, build a history, then expand |
| Following a competitor into a subreddit blindly | Copying a competitor because they posted there once | Check if they were welcomed, ignored or downvoted |
| Picking subreddits by size alone | Ranking rooms by total members | Compare weekly contributions, which Reddit now shows instead |
| Never revisiting your list | Trusting last year's rules and mod team | Re-check your shortlist every few months |
The live demo reads your website and builds a sample Reddit roadmap with subreddit picks, rule-aware drafts and a daily plan you post yourself.
Free live demo with your own website, no signup.
After the finder
The finder answers where. These free tools answer whether, what and when.
The Subreddits Analyzer shows activity patterns and the best posting windows. Take your top 3 results there.
Check the rules Spot AutoModerator triggers and self-promo limits before you write.Draft the post Write a post that matches the format the community rewards.Check your account Make sure your posts are visible before you start.Test your title Score a headline against what tends to get clicks on Reddit.Straight answers on how to find subreddits, search them and pick the ones worth your time.
A subreddit finder is a tool that turns a topic or product description into a list of matching Reddit communities. This one is free, needs no login, and returns 12 subreddits with an estimated size, a self-promotion tolerance rating, a relevance score out of 10, why each fits, a typical posting time and a posting tip.
You describe your product in one sentence and pick a category. An AI model matches that description to subreddits where your users already talk about the problem you solve, scores each one and sorts the 12 results by relevance. It does not pull live Reddit data, so member counts are estimates and you should open each community to confirm its rules and weekly activity.
One sentence that names who the product is for and the problem it solves, not a single keyword. 'AI tool that helps SaaS founders write Reddit posts that drive traffic' gives the finder an audience and a problem to match, while 'Reddit tool' only gives it a topic. Pick the closest category, then run a second search from another angle, such as the audience or the outcome, to surface rooms the first one missed.
Yes. It is free with no login required. A light limit of a few searches per minute stops abuse, so if you hit it, wait a minute and run the search again.
Three quick ways to find a subreddit: describe your topic in the finder above, search 3 to 5 keywords on Reddit and switch results to Communities, or post in r/findareddit and let other Redditors suggest rooms. Communities that come up in more than one method are your strongest picks.
Check the sidebar, About tab and wiki of a subreddit you like, because moderators often list sister communities there. Then look at the profiles of its most active commenters, try Map of Reddit (which links subreddits that share commenters), or type 'communities like r/name for [your audience]' into the finder above.
Search your hobby on Reddit, switch to Communities and open the smaller results. Keep a room if its newest post is only hours old, it shows several weekly contributions per 100 weekly visitors, and the top posts of the past month have real comment threads. In our test, rooms between 100K and 500K members were the most open to makers sharing their work.
Start niche. Large general subreddits have the biggest audiences, but most of them restrict direct promotion, while niche communities where your users already discuss the problem you solve are smaller and far more relevant. In our test, rooms between 100K and 500K members were the most open to makers sharing their work. Check each one's rules and weekly activity before you post, then expand to bigger rooms once you have a track record.
Open the subreddit, then use the search bar at the top: on desktop it is scoped to the current subreddit until you clear the r/name chip, and in the apps you tap the search icon inside the community. To search a specific subreddit from Google, type site:reddit.com/r/name followed by your keyword.
On desktop, open the left sidebar and expand Communities, which lists every subreddit you joined plus a Manage communities link. In the Reddit app, open the menu on the left to see your communities. On old Reddit, the page old.reddit.com/subreddits/mine shows the same list.
Self-promo tolerance rates how welcoming each subreddit is to promotional content. High means the community is generally open to product mentions, Medium means you need to lead with value first, and Low means direct promotion will likely get removed or get you banned. Always confirm it against the subreddit's own rules, because moderators decide what counts as spam in their community.
Member counts in the results are AI estimates meant to show rough community size. Reddit itself has moved away from showing total members publicly: communities now display weekly visitors and weekly contributions on new reddit.com and the apps. Open each subreddit to check its current weekly numbers before you commit.
GummySearch stopped new signups on November 30, 2025 after failing to reach a commercial license agreement for Reddit's Data API. Existing paid customers keep access until November 30, 2026, and the service shuts down with data deleted on December 1, 2026, according to its official closure notice.
Yes. The subreddit for finding subreddits is r/findareddit: you describe what you are looking for and other Redditors reply with communities. It works well for hobbies and niche questions, while a subreddit finder is faster when you need a ranked list with promo rules for a product.
Communities built for sharing projects, such as r/SideProject and r/IMadeThis, are the usual starting points because sharing your own work is their purpose. r/SaaS, r/Entrepreneur, r/startups and r/EntrepreneurRideAlong suit discussion and lessons learned, but most of them restrict direct promotion, so read each rule list first. The strongest picks are usually niche communities where your target users talk about the problem you solve, which is what the finder above surfaces.
The finder answers 'which subreddits should I post in for my product' by generating a matched shortlist. The Subreddits Analyzer answers 'is this particular subreddit worth posting in' by showing activity patterns and the best posting windows for communities you pick. Use the finder first, then the analyzer on your top candidates.
