Subscriber counts, exact promotion rules, and what kind of post actually drives signups. Bookmark this list.
Start with 2 or 3 subreddits, not all 20. The list below is ranked so you can pick the ones that actually fit your startup type.
Every subreddit has different rules. Some ban self promotion outright, others require it. The promotion rule column tells you which is which.
Format beats reach. A well written post in a 5K subreddit routinely outperforms a pitchy one in a 5M subreddit.
Pure promo gets removed. Frame as a question or learning to get traction.
Largest founder community. High noise but huge upside if your post stands out.
Tight knit SaaS founder hub. Launches and revenue updates resonate.
Showcase your project. The point of the subreddit is mutual project feedback.
High signal community of bootstrappers. Share metrics, get traction.
Founders share entire journeys. Great for case study posts.
Massive but treated more like a help forum. Mention via comments.
Useful for getting reactions on your concept early.
Niche but engaged. Great for sharing growth experiments.
If your startup is marketing related, post insights, not pitches.
Smaller but targeted to marketing folks.
Pure beta tester community. Get real users for free.
Post your startup, get harsh useful feedback. Brutal but eye opening.
If you build for freelancers, mention naturally in answers.
Smaller version of r/smallbusiness. More approachable.
Specifically for solo SaaS builders. Niche but very welcoming.
Best place for offline service startups.
If you have an ecommerce startup, here is a deal forum.
Highly specific. If your tool is built in Python, use the niche.
Use your data as the post. Mention your tool only as the source.
Same data as the cards above, laid out as a table so you can scan promotion rules and conversion notes side by side.
Every member count on this page was checked against the live Reddit API on July 23, 2026. Subreddit populations move constantly, so treat the numbers as a snapshot, not a permanent ranking, and expect the smaller niche communities in particular to shift faster than the large ones.
| Subreddit | Members | Promotion Rule | What Converts |
|---|---|---|---|
| r/startups | 2M | Limited, value first | Pure promo gets removed. Frame as a question or learning to get traction. |
| r/Entrepreneur | 5.2M | Strict, story format | Largest founder community. High noise but huge upside if your post stands out. |
| r/SaaS | 750K | Allowed for SaaS specifically | Tight knit SaaS founder hub. Launches and revenue updates resonate. |
| r/SideProject | 780K | Yes, encouraged | Showcase your project. The point of the subreddit is mutual project feedback. |
| r/IndieHackers | 183K | Yes, build in public | High signal community of bootstrappers. Share metrics, get traction. |
| r/EntrepreneurRideAlong | 710K | Yes for full transparency | Founders share entire journeys. Great for case study posts. |
| r/smallbusiness | 2.5M | Mostly value posts | Massive but treated more like a help forum. Mention via comments. |
| r/Business_Ideas | 460K | Allowed for new launches | Useful for getting reactions on your concept early. |
| r/SaaSGrowthHacks | 5K | Yes for SaaS only | Niche but engaged. Great for sharing growth experiments. |
| r/marketing | 1.9M | Strict, educational only | If your startup is marketing related, post insights, not pitches. |
| r/Marketingmentor | 20K | Yes for marketing tools | Smaller but targeted to marketing folks. |
| r/AlphaandBetausers | 39K | Yes for new launches | Pure beta tester community. Get real users for free. |
| r/Roastmystartup | 33K | Yes, mandatory | Post your startup, get harsh useful feedback. Brutal but eye opening. |
| r/freelance | 687K | Tools allowed if relevant | If you build for freelancers, mention naturally in answers. |
| r/SmallBusinessOwners | 75K | Limited, contextual | Smaller version of r/smallbusiness. More approachable. |
| r/microsaas | 205K | Yes, encouraged | Specifically for solo SaaS builders. Niche but very welcoming. |
| r/sweatystartup | 207K | For service businesses | Best place for offline service startups. |
| r/EcomDeals | 20K | Yes for ecommerce | If you have an ecommerce startup, here is a deal forum. |
| r/madeinpython | 20K | Yes for Python projects | Highly specific. If your tool is built in Python, use the niche. |
| r/dataisbeautiful | 20M | Indirect, via insights | Use your data as the post. Mention your tool only as the source. |
These figures come directly from Reddit's own investor and company page, not a third party estimate.
That is the total reachable audience across every subreddit combined, and Reddit reports it growing every quarter.
View the reportPeople are on Reddit every single day, not just once a month, so a well timed post gets seen fast.
View the reportMost startups only need 5 to 8 of them. Picking the wrong ones out of 100K+ is the single most common founder mistake.
View the reportA short walkthrough from HubSpot Marketing on running Reddit campaigns the platform rewards instead of flags.
Posting in 20 subreddits is a quick way to get shadowbanned. MediaFast picks the 5 to 8 best subreddits for your specific startup and tells you what kind of post each one converts on.
Match your product type to the subreddits most likely to tolerate, or even welcome, your post.
r/SaaS, r/microsaas, r/SaaSGrowthHacks
These are the only three subreddits on this list where a SaaS pitch is explicitly welcome, not just tolerated.
r/SideProject, r/IndieHackers, r/AlphaandBetausers
Built for showcasing and getting your first real users, not for closing enterprise deals.
r/sweatystartup, r/SmallBusinessOwners, r/smallbusiness
Offline and service businesses get taken far more seriously here than in tech-heavy subs.
r/EcomDeals, r/Business_Ideas
r/EcomDeals is built around deals and launches, r/Business_Ideas is where people react honestly to new concepts.
r/madeinpython, r/IndieHackers
Niche subreddits convert far better than general ones once your audience is technical.
r/dataisbeautiful, r/SaaS
Lead with the data your product produces, not the product itself, and let the tool be the footnote.
r/freelance, r/Marketingmentor
Answer real questions freelancers ask and mention your tool only when it is genuinely the answer.
r/Roastmystartup, r/Entrepreneur
Get the brutal feedback before you spend budget driving traffic to a page that might not convert.
r/marketing, r/SaaSGrowthHacks, r/Marketingmentor
Marketers on Reddit are skeptical of tool pitches, so lead with a tactic or result and mention the tool as how you achieved it.
r/Business_Ideas, r/smallbusiness
These communities are built for reacting to unproven ideas honestly, use them before you build rather than after.
The same seven steps work whether you're posting in a 5K niche sub or a 5.2M general one.
Spend seven days commenting in the subreddit before you post anything of your own. This is the single biggest predictor of whether a post survives.
Every subreddit in the table below has different self promotion rules. Some require a specific day, some ban links outright, some want full disclosure.
Cross posting identical content the same day is the fastest route to a shadowban. One subreddit, one week, then move to the next.
Lead with a lesson, a number, or a story. The product mention should feel like a footnote, not the headline.
Say plainly that it's your product. Redditors forgive self promotion far more easily when it's upfront instead of hidden.
Comments in the first two hours are what push a post up the feed. A post with zero founder replies reads as a drive-by pitch.
Spacing posts out avoids the pattern that triggers Reddit's spam and vote manipulation filters.
Exact thresholds are set per subreddit and change without notice. These are the general ranges moderators reference most often across the list above.
| Account Status | Removal Risk | What To Do |
|---|---|---|
| New account, 0 karma | High | AutoModerator filters or removes almost every post automatically. Comment for at least a week first. |
| Account under 30 days old | High | Several subreddits on this list auto-remove posts from accounts newer than 30 days, no exceptions. |
| 50 to 100 comment karma | Medium | This is the informal threshold moderators reference most often. Build it through genuine comments, not karma farming tricks. |
| Prior activity in the niche | Low | An account that already commented in r/startups or r/SaaS before posting reads as a real member, not a drive-by marketer. |
The difference between a post that converts and one that gets removed usually comes down to these five habits.
Copy the structure, fill in your own details. These are the formats that consistently survive moderation and drive replies.
Best for r/IndieHackers, r/SideProject, r/microsaas
Title: [Metric] in [timeframe] building [what it is] Body: Started [product] [timeframe] ago because [problem you had]. Here's what happened: [1-2 real numbers or a specific result]. What worked: [one tactic]. What didn't: [one honest failure]. Happy to answer anything about the [stack/pricing/growth] side.
Best for r/Entrepreneur, r/startups, r/EntrepreneurRideAlong
Title: I built [product] because [specific frustrating moment] Body: [2-3 sentences on the exact problem, told as a story, not a pitch]. So I built [product]. Full disclosure, it's mine. Here's the part that actually worked: [insight]. Curious how others have handled [related problem].
Best for r/dataisbeautiful, r/SaaS, r/marketing
Title: [Number] things I learned from [specific data or campaign] Body: Ran [campaign/analysis] over [timeframe]. Sharing the raw takeaways. 1. [Insight backed by a number] 2. [Insight backed by a number] 3. [Insight backed by a number] Built [product] to track this if anyone wants to dig into the data themselves.
Best for r/Roastmystartup, r/Business_Ideas, r/AlphaandBetausers
Title: Be honest, does [product] actually solve [problem]? Body: Full disclosure, I built this. Not looking for compliments. Here's what it does: [1-2 sentence description]. Here's what I'm unsure about: [specific weak point you genuinely want feedback on]. Link in comments if anyone wants to try it, don't want this flagged as spam.
Both belong in your strategy, but they play different roles. Here is how the two ends of this list actually compare.
r/Entrepreneur, r/startups, r/smallbusiness, r/marketing, r/dataisbeautiful
r/SaaSGrowthHacks, r/microsaas, r/AlphaandBetausers, r/Roastmystartup, r/madeinpython
Upvotes feel good but rarely pay the bills. These four signals tell you whether a subreddit is actually worth returning to.
Comments are a far better signal than upvotes. A post with real discussion is what Reddit's own ranking rewards with more visibility.
If you share a link, track clicks separately from upvotes. A high upvote, low click post usually means the headline promised something the link didn't deliver.
Use a unique UTM link or a dedicated landing page per subreddit so you know which community is actually converting, not just upvoting.
Posts that get a genuine reply within the first 30 minutes are far more likely to keep climbing. If nothing happens in an hour, engage in the comments yourself to restart momentum.
A few names on this list sound interchangeable but have meaningfully different audiences. Picking the wrong twin wastes a post.
r/startups skews toward venture backed, product and growth stage discussion. r/Entrepreneur is broader and includes solo operators, side hustles, and general small business talk alongside tech founders.
r/SideProject is explicitly for showing off what you built, even unfinished. r/IndieHackers leans toward revenue and build in public updates from people already treating the project as a real business.
r/smallbusiness is much larger and functions more like a help forum, heavy on questions about taxes, hiring, and operations. r/SmallBusinessOwners is smaller and more conversational, better for softer mentions.
r/SaaS covers SaaS at any size, including funded companies. r/microsaas is specifically for solo or small team builders running lean, bootstrapped SaaS products, and tends to be friendlier to first time posters.
MediaFast auto generates a curated subreddit list from your product description.
What founders ask before launching.
Different audiences. r/Entrepreneur leans general business and operators. r/startups is more tech and venture focused. Test both with different framings.
Read each subreddit's wiki and rules before posting. Build at least 50 comment karma in the community first. Always frame promotional content as story or value, never as pure pitch.
No. Cross posting identical content is the fastest way to get shadowbanned. Wait 7 days between subreddits and rewrite each post for the audience.
Most founders blame the subreddit when the actual issue is the post format. A great post in r/SaaS converts. A pitchy post in r/SaaS gets removed. Format matters more than reach.
There is no universal number, but 50 to 100 comment karma from genuine participation is the informal threshold most moderators reference. Account age matters too, many subreddits auto-remove posts from accounts under 30 days old.
Posts framed as a story, a lesson, or a data point outperform anything that reads like an ad. Reply to every comment in the first two hours, that engagement is what pushes a post up the feed and drives real signups.
Start niche. A 5K member subreddit like r/SaaSGrowthHacks converts better per post than r/Entrepreneur at 5.2M because the audience is self selected and the noise is lower. Save the big general subreddits for once you have a post format that already works.
Upvote count is the vanity metric. Track comment replies, click throughs on any link you share, and signups attributed to that specific post. A post with 40 upvotes and 20 real comments usually outperforms one with 400 upvotes and no discussion.
It depends on the subreddit. Larger ones like r/Entrepreneur rely mostly on AutoModerator rules plus reports from members. Smaller ones like r/Roastmystartup or r/madeinpython often have a human moderator reviewing new posts directly.
