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Describe your product in one sentence, pick a category, and the finder returns 12 subreddits where your buyers already hang out, each with a self-promo tolerance rating, a relevance score, a good posting time and a tip for that community.
Treat the list as a shortlist, not a green light. Before you post, open each subreddit, read its rules and check its weekly visitors and contributions. Then run your top picks through the Subreddits Analyzer to see whether each one is worth your time.
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.
After you find the subreddits
A list of subs is step one. MediaFast turns it into a daily plan: which sub, which post, which thread to comment in, all checked against each community's rules.
Not sure which one fits? Compare every plan side by side further down this page.
Step-by-step method
Picking subreddits at random is the fastest way to get removed or ignored. This is the manual version of what the finder does, plus the checks it cannot do for you.
Describe the product in one sentence, let a matching tool cross-reference it against active communities, then confirm each suggestion on Reddit: read the rules, check weekly visitors and weekly contributions, and look at what the top posts are about. Aim for 5 to 10 focused subreddits with a clear self-promo policy rather than one giant subreddit full of passive readers. When you have candidates, analyze each subreddit's activity and then use the Reddit growth strategy playbook to turn the shortlist into steady participation.
Before you open Reddit, write down who you are trying to reach: job title or hobby, main pain point, and the words they would search for. Vague targeting leads to vague subreddit choices. The sharper this sentence, the better the finder above matches communities.
Go to Reddit search, type 3 to 5 keywords that describe your product or the problem it solves, and switch the results to Communities. Subreddits that show up for several keywords are your seed communities.
Open each candidate and read the rules in full. Many subreddits ban self-promotion, affiliate links or launch posts outright. Skipping this step is the most common way marketers get their posts removed.
Sort by New and look at how recent the latest posts are. A community where new posts arrive every few hours is alive. If the newest post is days old, your post will sit unseen. If posts arrive every minute, yours will be buried fast.
Some subreddits spell it out, for example a weekly showcase thread or 'share your own project once per week'. If there is no written policy, look at whether product posts in the history were removed or welcomed.
Sort by Top and choose All Time. The top 20 posts show the format this community rewards: long write-ups, screenshots, short questions or data. Match your post format to what already performs.
A small community made of your exact target customers beats a giant general one full of passive readers. Prioritize subreddits where the top posts discuss problems your product solves.
Pick your top 3 candidates and leave one genuinely helpful, non-promotional comment in each. Watch how the community responds to your account and writing style. If the response is positive, add that subreddit to your rotation.
Why it matters
The same post can get removed in one community and welcomed in the next. The difference is almost always fit and rules, not writing skill.
Each subreddit has its own moderators, rules, culture and tolerance for promotion. Matching your product to the right ones is the first and most important step in Reddit marketing.
Reddit's spam policy says community moderators judge what counts as spammy in their own communities. The wrong subreddit turns a good post into a removal.
You do not need to be everywhere. A focused set of high-relevance, promotion-tolerant subreddits gives you a channel you can keep up with every week.
Start with high-tolerance communities
Focus first on subreddits that welcome product discussions. They are your safest entry points. Build a history there before moving to stricter communities.
Read the rules before you post
Some subreddits allow self-promotion on specific days. Others ban it entirely. Knowing the rules is not optional on Reddit.
Engage before you promote
Spend a week or two commenting helpfully in each subreddit before sharing your own content, so your post history shows a real member, not a drive-by marketer.
Reddit's own tools, 2026
Reddit ships its own discovery features now. Use them to double-check the finder's list and to keep finding new communities after launch.
| Tool | What it shows you | Best for |
|---|---|---|
| Reddit search, Communities tab | Search results can be switched between content types, one of which is Communities, so you see subreddits that match your keyword instead of single posts. How Reddit search works | Fast seed list from 3 to 5 keywords |
| Reddit Answers (Ask button) | Reddit's AI search summarizes posts and comments with citations and lists the communities those answers come from. Available in English, Spanish, Brazilian Portuguese, Italian, French and German. Reddit's AI search | Seeing which communities discuss a problem in depth |
| Reddit Pro Trends | Track keywords and see the communities where people are talking about them. Smart keywords add conversation volume and an AI summary of the top discussions. Reddit Pro Trends | Ongoing monitoring of your brand, competitors and category |
| Reddit Pro Links | Publishers who verify their domain see how their links spread (posts, communities, clicks) and get community recommendations for where to share. Desktop only. Reddit Pro Links | Publishers and blogs with existing links on Reddit |
| This subreddit finder | Turns one product sentence into 12 matched communities with self-promo tolerance, relevance, posting time and a tip, in one pass. | A ready shortlist before you open Reddit |
Reddit Pro is a free suite of organic tools for businesses, separate from Reddit Ads and Reddit Premium. It is in beta and open to eligible businesses in English-speaking countries.
Type the question your customer would ask into Reddit's AI search. The answer cites real posts and lists the communities behind them, which is a quick check of where your buyers already talk.
The finder gives you a ranked shortlist in seconds. Reddit's own tools confirm which of those communities are talking about your topic this week.
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."
"I've never really understood how the algorithms work on Reddit but after using Reddit Fast I finally get it!!"
"Things are going well mate thanks for you product. It helps me to step into reddit very intuitively!"
Reddit policy
Promotion is allowed on Reddit. Spam is not. These are the lines Reddit draws in its help center, and why subreddit choice matters so much.
Reddit's guide for moderators says promotional content is not inherently considered spam. Some communities follow the 10% rule: about 10% self-promotion and 90% helpful participation.
The sitewide spam policy covers repeated or unsolicited actions, automated or manual. Examples include mass-posting repetitive content for exposure or financial gain, and using bots or generative AI tools in ways that facilitate spam.
The same policy advises posting authentic content into communities where you have a personal interest. If most of what you post is links to your own business, Reddit says to think about how often you do it, or consider its self-serve ads.
Moderators can switch on filters such as the reputation filter (sitewide signals), Crowd Control (signals from inside the community) and a ban evasion filter, on top of AutoModerator rules. A good fit and a clean history make it far more likely your post goes live.
Reddit's karma help page notes that some communities require a certain amount of karma before you can post. New accounts should start where the bar is low.
Reddit changed its stats
Reddit replaced total members and 'online now' with two weekly numbers. Here is how to use them when you narrow the finder's 12 results down to 5.
Unique people who visited the community in the past 7 days, based on a 28-day rolling average. Per Reddit's help center, it leaves out anonymous browsing on the apps and bots.
Posts and comments made in the past 7 days, not counting removed content. A high number relative to visitors means people talk back, which is what you want before you post.
The weekly stats show on the Reddit apps and new reddit.com. The old member counts were removed from old.reddit.com and the new stats are not shown there, so check on new Reddit.
| Scorecard column | Where to find it | Keep the subreddit 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 on new Reddit or the app | Big enough that a post gets seen, focused enough that it fits |
| Weekly contributions | Community header on new Reddit or the app | People post and comment every day, not once a week |
| Karma or age gate | Rules, or a removal message after a test comment | Your account already clears it |
| Recent top posts | Sort by Top, past month | At least a few posts solve the problem your product solves |
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.
A short walkthrough of Reddit's own search and community signals (The School of Digital Marketing, 4 min)
Signal reference
Use this table on every new community. Each signal has a healthy pattern and a red flag.
| Signal | What to look for | Red flag |
|---|---|---|
| Weekly visitors | Enough weekly visitors that a good post gets seen, in a community focused on your topic. | Very low weekly visitors (too quiet), or a huge general audience with no niche focus (too competitive). |
| Weekly contributions | A steady flow of posts and comments each week, which shows people talk, not just read. | Almost no contributions for the size of the audience. Readers who never reply rarely click. |
| Self-promo rules | A written policy, such as a weekly showcase thread or 'share your projects on Saturdays'. | Rules say 'No self-promotion' or 'No links' with no exceptions. |
| Engagement quality | Top posts have multi-sentence replies, follow-up questions and shared experiences. | Top posts have many upvotes but only a few one-word comments. |
| Audience fit | The problems discussed in top posts are problems your product solves directly. | Your product is only loosely related and nothing in the top 50 posts mentions your category. |
| Moderation | Mods are active and fair. Removals come with a clear rule reference. | Posts vanish silently and often, with no visible pattern and no explanation. |
If a subreddit's self-promo rules are unclear from the rules page alone, a subreddit rules checker can flag likely AutoModerator triggers before you draft the post.
Decision framework
Run each result from the finder through these if-then branches before it goes on your posting list.
If the community is small but very active and squarely on your topic
Post. Small focused communities often convert well. Low competition, high audience fit.
If the community is huge and the topic is broad (for example r/funny or r/AskReddit)
Skip unless your post is truly shareable for everyone. Promotional content has near-zero reach here.
If the rules say no self-promotion but the history shows helpful build stories getting upvotes
Proceed with care. Frame it as a story or question, not a launch post, and never break a written rule.
If comment threads are long and lively but the rules ban direct promotion
Use it for awareness and community building only. Comment helpfully, never drop links. Long-term play.
If the community is mid-sized and directly discusses your product category
Prioritize. Enough reach to matter, specific enough to convert.
If recent posts show frequent removal notices for content like yours
Skip. Heavy moderation against your content type means any effort here is wasted.
If there is a weekly thread for sharing projects (for example a showcase or 'share your project' thread)
Add it now. Weekly threads are the safest, most predictable posting slot on Reddit.
If the newest post in New is more than 3 days old
Remove it from your list. A dormant subreddit will not surface your post to anyone.
Once a subreddit clears the framework, a Reddit opportunity finder can surface live threads inside it worth joining now, instead of waiting to post cold.
Niche examples
Not sure where to start? These are common starting points for six niches. Always read each community's rules before posting.
| Niche | Subreddits to start with |
|---|---|
| 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 get you so far. Tools like MediaFast and the finder at the top of this page match your specific product instead of your broad category, which is how you surface the smaller communities these lists miss.
Avoid these errors
These are the patterns behind most removed posts and zero-engagement launches. Check each one before you commit to a community.
Targeting the biggest subreddit in the category. The largest community in a niche usually has the strictest rules and the most skeptical audience. A smaller, practitioner-focused neighbor is often a better first home for your posts.
Skimming the self-promo rule. Many marketers only look for a ban on links. The real policy is often more nuanced: links allowed in comments but not posts, promotion allowed only in a weekly thread, or a karma minimum before you can post. Read every rule.
Posting to 20 subreddits on day one. Reddit's spam policy names mass-posting repetitive content for exposure or financial gain as spam. Start with 2 or 3 communities, build a history, then expand slowly.
Choosing a subreddit because a competitor appeared there once. One post does not prove fit. Open the competitor's comment section: were they welcomed, ignored or downvoted? Then check whether similar posts perform consistently.
Picking subreddits by size alone. Reddit itself now leads with weekly visitors and weekly contributions instead of total members, because a big number of past joiners says little about who shows up today. Compare how much people contribute, not just how many visit.
Never revisiting your list. Rules, mod teams and culture change. A subreddit that welcomed product posts last year may have new rules now. Re-check your shortlist every few months.
Glossary
Terms that come up constantly when you research and post to subreddits, updated for Reddit's 2026 community stats.
A topic-specific community on Reddit, identified by the prefix r/. Each subreddit has its own moderators, rules and culture.
The number of unique people who visited a community in the past 7 days, calculated from a 28-day rolling average. Reddit shows it in place of the old total-members count on new reddit.com and the apps.
The number of posts and comments made in a community in the past 7 days. Removed content is not counted.
A score that grows as your posts and comments get upvoted. Some communities require a minimum karma before you can post, which keeps brand-new spam accounts out.
A subreddit policy that limits posts you have a personal or commercial stake in. Some communities follow the 10% rule: roughly 10% self-promotion, 90% helpful participation.
Reddit's configurable moderation bot. Mods use it to remove or filter posts by keyword, account age, karma or link. If your post disappears seconds after posting, AutoModerator is the usual suspect.
A community focused on a narrow topic, audience or use case. The audience is pre-qualified and competition is lower, which is why most Reddit marketing wins happen here.
This finder answers where you should post. The Subreddits Analyzer answers whether a specific subreddit deserves your time, with its activity pattern and the best posting windows. Take your top 3 results there next.
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Straight answers on finding the right subreddits for your product, and what the results mean.
You describe your product in one sentence and pick a category. The AI matches that description against real, active subreddits and returns 12 communities, each with estimated members, a self-promotion tolerance rating, a relevance score out of 10, why it fits, a good posting time and a posting tip.
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.
Yes. It is free with no login required. A light per-minute limit stops abuse, so if you hit it, wait a minute and run the search again.
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.
Start with subreddits rated High for self-promo tolerance and with high relevance scores. Before posting about your product, comment helpfully in each community for a while and read its rules. Then evaluate your top picks one by one in the Subreddits Analyzer to see activity and good posting windows.
There are three reliable ways: (1) use a subreddit finder like this one and get AI-matched communities with self-promo ratings, (2) search Reddit with 3 to 5 keywords and switch the results to Communities, and (3) search your competitor's name or your problem keywords on Reddit and note which communities keep coming up. Reddit Pro Trends, a free Reddit tool for businesses, can also show communities talking about a keyword you track.
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.
Common picks for marketers include r/marketing, r/digital_marketing, r/SEO, r/PPC, r/content_marketing, r/socialmedia, r/copywriting and r/GrowthHacking. For B2B work, r/SaaS and r/Entrepreneur add useful context. Lurking and contributing in these communities teaches you what customers complain about, which is often better input than any keyword tool.
City subreddits such as r/chicago or r/AskChicago are useful for local businesses because the audience is already geo-qualified. Search 'r/yourcity' and check the sidebar for related local communities. Most city subreddits are strict about ads, so read the rules and contribute locally useful answers before mentioning a business.
Usually not for product promotion. Huge general communities are extremely strict about self-promotion and move fast, so a product post rarely survives or gets seen. For marketing, focused communities where your exact audience discusses your category tend to work far better.
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.
MediaFast turns your subreddit shortlist into rule-aware post drafts and a posting plan you edit and publish yourself.
No time to do Reddit yourself?
