Three communities done properly beats thirty done thinly
Most advice for founders who want customers from communities is “provide value.” True and useless. Value in a Slack workspace of demand-gen leaders looks nothing like value in a subreddit of solo builders, and what gets you quietly muted in one room gets you upvoted in the other.
Start with the decision that compounds: where you show up. We check 200 communities by hand and record platform, member count, activity level, pricing and joining rules, and the pattern is that reach and fit rarely point the same way. r/SaaS (Reddit, ~755K) and r/SideProject (Reddit, ~778K) are enormous, so your comment competes with hundreds and most readers are builders, not buyers. r/micro_saas (Reddit, ~92K) is far smaller and closer to one kind of operator; RevGenius (Slack, 50K+) is revenue teams; Online Geniuses (Slack, 53K+) is marketers and agency owners. None is “better” — different rooms, different people.
We’d suggest picking three and committing to six months. Three isn’t magic, it’s a workload number: being useful means reading a community most days and knowing what’s already been asked to death. You can’t do that in thirty places, and the failure mode of thirty is always the same — you stop reading and start broadcasting.
Choose from the categories your buyers sit in: SaaS communities, growth and marketing communities if your buyer owns pipeline, startup communities if your buyer is a founder spending their own money.
Read the self-promotion rules before you write anything
Positions on promotion vary more than people assume. Some communities ban links outright, some allow them only in a weekly thread, some are relaxed in channels but treat an unsolicited DM as a bannable offense, some have no written rule and a very strong unwritten one.
That’s why we record joining and self-promotion rules for every listing in the 200 communities we track. Before your first post, read the rules page or pinned message in full, then scroll a month of history to see how they’re enforced. Written rules tell you the ceiling; moderator behavior tells you the real line.
Platform shapes enforcement too. Reddit communities sit under subreddit rules and Reddit’s site-wide policy, and Reddit’s own self-promotion guidance asks people whose posts are mostly links to their own work to be thoughtful about frequency and to contribute far more than they promote. Slack growth communities work differently: a designated promo channel, an intro channel, and an unspoken rule that the member directory is not a lead list.
Demand capture is where the customers are
Demand capture is answering someone who already described your problem in their own words — somebody posts “our onboarding emails are a mess and I can’t tell which ones convert” and you sell onboarding analytics. It’s the highest-yield thing you can do in someone else’s community, and it’s almost never against the rules, because you’re responding to a request rather than originating a pitch.
Demand creation is telling people they have a problem they haven’t named. Legitimate work, but in a community it reads as marketing, because it is. It belongs in the formats a community has sanctioned — launch threads, promo channels, AMA slots — and nowhere else.
The practical version is unglamorous: set up searches for the three or four phrases your buyers use when they’re stuck, check them daily, answer. Most founders skip it because it yields one or two openings a week rather than a campaign.
Write the answer so the link is optional
The test we’d apply to any reply: if you deleted the link, would the comment still be worth reading? If yes, post it. If no, you’ve written an ad with a paragraph attached.
So answer the question completely — including the part your product doesn’t solve, and the free or manual way to do it. Then, if links are allowed, one mention, disclosed as yours: “I build X, so take that into account.” Disclosure isn’t modesty; it stops a reader discovering your bias later and re-reading everything you’ve posted as a pitch.
The spammy move and the non-spammy version of the same intent
| What you want | The spammy version | The version that works |
|---|---|---|
| People to know your product exists | “Just launched, check it out” in the main channel | The promo thread the rules designate, leading with the problem and who it’s for |
| To reply to a relevant question | “We built a tool for exactly this — DM me” | Answer fully, then one disclosed mention of your tool as one option among several |
| To reach someone who commented | Cold DM with a demo link | Reply in the thread; DM only if invited or clearly permitted |
| Feedback on your product | “Roast my landing page” in five communities the same day | One post, in the feedback thread, asking one question you can’t answer yourself |
| Attention for a blog post | Title plus link, no context | Write the argument in the post; link as a source, where links are allowed |
When “build in public” is welcome and when it’s noise
These posts earn their place when they hand the reader something transferable: the pricing change and what it did to churn, the architecture you abandoned and why, the channel that failed. The lesson travels whether or not the reader ever buys from you.
They’re noise when the content is a number and a feeling — revenue screenshots, “day 47 of building,” milestone celebrations. Those work in communities built for them and grate everywhere else. In a room of buyers rather than builders, a progress update is a status post, and status posts spend goodwill without producing anything.
Our test: if the post is interesting to someone who will never buy from you, it belongs there.
The research value is larger than the leads
Treat communities as a listening post first. The words people use for their problem, the tools they compare, the objections they raise about your category — that’s positioning research you can’t buy, sitting in public threads.
Read a few months of somewhere like SaaS Growth Hacks (Facebook, ~28K) or Product School Slack (Slack, 100K+) with a document open and you’ll rewrite your homepage before you write a single promotional post. A founder who describes the problem the way the room describes it converts better everywhere — see our guide to your first 30 days as a member.
What gets you banned — and why that’s the smaller cost
Bluntly, the recurring offenses: link-dropping with no context; the same message across several channels or communities; DMing members you met in a thread; only answering questions where your product is the answer; a second account asking a question you then answer; ignoring a moderator’s first correction.
But ban risk isn’t the real cost, and treating it as the main risk leads people to optimize for not getting caught. The real cost is reputation, and it’s asymmetric. A ban removes you from a room. A reputation as the person who pitches removes your ability to sell to everyone still in it — including people who never commented and will simply never reply to your email a year from now. The room you burned is, by construction, full of your buyers.
Measuring this without lying to yourself
Community-sourced revenue doesn’t attribute cleanly. Someone reads your comment, doesn’t click, searches your brand three weeks later, arrives via organic — your analytics calls that SEO. Anything promising clean community attribution is modeling, not measuring. Instead:
- Ask. A free-text “how did you hear about us?” on signup, read manually. Imperfect, still the best signal available.
- Tag the links you do post with UTMs, accepting they catch only those who click immediately.
- Watch direct and branded search after sustained participation. A rise you can’t attribute elsewhere is weak evidence — which is what this channel produces.
- Count inputs. Threads answered, conversations started, calls booked from a thread.
- Judge on a quarter. Three months of honest participation with no conversations means the wrong room — change the room, not the tactics.
This isn’t community-led growth
Everything above is acquisition through other people’s communities: you’re a guest, the rules are theirs, and your leverage comes from being useful inside constraints you didn’t set. Building your own community is a different motion — slow, owned, closer to a product than a channel. If that’s what you’re weighing, start with growing a community from 0 to 1,000 members instead, and don’t run one you own on tactics meant for rooms you’re visiting.
