Some communities have thousands of members and barely any activity. Others have a fraction of that number and feel genuinely alive every day.
The difference is rarely the platform or the topic. It is almost always what the community does, how it is structured, how it is moderated, and what keeps members coming back.
These12 online community examples in this guide span every type of online community, from massive public platforms to small private membership groups. Each one has figured out something specific worth borrowing. Here is what that looks like in practice and what you can take from each.
If you want the full framework for understanding the different types of online communities before diving into examples, our guide covers each model in depth.
12 Communities Worth Studying and Why
These are not the biggest communities on the internet. Some of them are. But the reason they are on this list is not size, it is that each one has figured out something specific that makes it work, and that thing is worth borrowing regardless of what you are building or how many members you have right now.
Interest-Based Community Examples
Interest-based communities gather people around a shared passion. They are the most common type of online community and often the easiest to grow because people are already searching for the topic.
1. Reddit (r/Entrepreneur)
Reddit's structure is its superpower. Each subreddit operates as its own community with its own rules, moderators, and culture. r/Entrepreneur manages an enormous volume of posts and keeps quality relatively consistent through one mechanism: the upvote and downvote system acts as a crowd-sourced quality filter. Posts with useful, actionable content rise. Vague complaints or self-promotion sink. The community itself does most of the moderation work.
The sidebar rules are specific. Not “be nice” but the actual guidelines about what is allowed, what is not, and why. That specificity sets expectations before someone posts their first comment.
What to take from this: Use upvoting or “helpful” reactions to surface quality content organically. Write specific rules, not vague ones.
2. Bogleheads
Bogleheads is an investment forum built around the philosophy of John Bogle, focused on low-cost, evidence-based, long-term investing. The community has been running for decades and has developed an unusually strong culture.
The forum norms are explicit. Speculation is discouraged. Anecdote without evidence gets gently challenged. Members cite studies, books, and data. The community has collectively decided what good financial discussion looks like and they enforce it socially rather than through heavy-handed moderation.
What to take from this: Culture can be encoded in behaviour, not just rules. Model the discussion style you want, explicitly and repeatedly, and members will follow.
Learning Community Examples
Learning communities are built around education. The community exists to make learning better: more accountable, more social, and more applied. The social layer is the product, not just the content.
3. Write of Passage
Write of Passage is David Perell's cohort-based writing community, widely cited as one of the strongest examples of how structured learning creates lasting community bonds. Each cohort starts together, progresses through the same curriculum on the same timeline, and finishes with a shared body of published work. Discussion is anchored to specific assignments and lessons. Students do not just consume content in isolation. They share drafts, give feedback, and build relationships through the process of learning together. Many cohort alumni remain active in the community years after completing the programme.
What to take from this: Cohort structures create belonging fast because shared struggle and shared milestones build real relationships. The community does not end when the course ends if the bonds formed during it are strong enough.
4. Maven
Maven is a marketplace for cohort-based courses with over 500,000 learners where instructors keep 90% of revenue. What makes Maven work as a community is its emphasis on peer interaction and accountability. Every course is structured around group timelines, live sessions, and collaborative assignments that keep participants connected throughout the learning experience.
What to take from this: Accountability structures; shared deadlines, group check-ins, peer review to keep learning communities active in ways that self-paced content cannot replicate.
Brand and Product Community Examples
Brand and product communities are built around a specific product or platform. Members are customers or users who gather to share tips, ask for help, and connect with others who use the same thing.
5. Sephora Beauty Insider Community
Sephora's community forum connected millions of beauty enthusiasts to share tips, ask questions, post photos, and discuss products. At its peak it was a strong example of using community to build brand loyalty and gather authentic user-generated content. Members did not just talk about products, they showed their work, shared tutorials, and celebrated each other's looks.
The community created social proof that no marketing campaign could manufacture. And it is worth noting that Sephora made the decision to retire the forum in mid-2026. A reminder that even well-resourced brand communities face platform decisions. The lesson from Sephora's model remains valid even as the forum winds down: when members can share their own work, discussion and creation reinforce each other in ways that purely text-based communities cannot match.
What to take from this: Integrate user-generated content directly into the community experience. When members can show their work, discussion and creation reinforce each other.
6. WordPress.org Support Forums
The WordPress.org support forums have been running for decades and handle an enormous volume of support questions almost entirely through volunteers. The “resolved” thread marking is critical. When a support question gets answered, it gets tagged as resolved. That tag makes it findable. Thousands of future users with the same problem find the answer without ever posting a new question.
What to take from this: Encourage thread resolution. It is a gift to every future member with the same question and it turns your community into a self-serve knowledge base.
Membership and Subscription Community Examples
Membership communities are gated behind a fee. The access itself; to content, people, and discussion, is the product and exclusivity is part of the value.
7. Exit Five
Exit Five is a community for B2B marketers built by Dave Gerhardt. It runs on Circle and has grown into one of the most respected professional communities in the marketing world. The community is tightly focused on a specific professional identity: people who work in B2B marketing. That specificity means every thread, every resource, and every job posting is directly relevant to every member. Exit Five also blends community with content where members get access to a newsletter, a podcast, and live events alongside the forum discussions.
What to take from this: Tight topic focus makes every conversation feel relevant. Combining community with content (newsletter, podcast, events) gives members more reasons to stay engaged.
8. Superpath
Superpath is a community for content marketing professionals that started as a Slack workspace and has since moved to its own dedicated platform. The channel structure is tight and deliberate. There are spaces for job postings, freelance leads, tools, strategy questions, and career advice. Every space has a clear purpose. Members know exactly where to post and exactly where to look for what they need.
What to take from this: Structured channels or forum categories prevent the “where do I post this?” confusion that kills engagement. Give members something tangible beyond conversation: job boards, resource libraries, curated content.
Support and Peer Community Examples
Support communities exist to help members navigate something hard. These communities often fill a gap that professional services cannot: the lived experience of someone who has been through the same thing.
9. HealthUnlocked
HealthUnlocked is a network of peer support communities for people managing health conditions. Each condition has its own community covering heart disease, diabetes, mental health, and hundreds more. The platform handles a uniquely sensitive type of discussion. Moderation here is not about keeping things on topic but it is about keeping people safe. Community managers and volunteer moderators work together. Guidelines about what can and cannot be shared are clear and consistently enforced.
What to take from this: In sensitive communities, moderation guidelines need to go beyond “be respectful.” Get specific about what help looks like and what is not appropriate to share.
10. Indie Hackers
Indie Hackers is a community for founders building bootstrapped businesses that sits somewhere between a forum and a media publication. Milestone posts are a core feature. Founders share revenue milestones publicly: first $1K MRR, first $10K month, first profitable quarter. Accountability threads are another staple. Members post their weekly or monthly goals publicly and check back in to report progress.
What to take from this: Build rituals around progress and accountability. They drive consistent return visits and turn a collection of members into a community.
Professional and Networking Community Examples
Professional communities exist for career development, industry connections, and professional advancement. The member directory and the ability to find and message specific people are the backbone of these communities.
11. LinkedIn Groups
LinkedIn Groups give professionals a structured space to discuss industry topics, share resources, and find collaborators within a professional network they already use. The best LinkedIn Groups are tightly managed around a specific professional niche and have active moderators who seed discussion and surface quality content. The integration with professional profiles means every contributor brings context: their role, their company, their experience.
What to take from this: Surface member credentials and roles. Let your community know who the experts are. Context shapes how members receive contributions.
12. Stack Overflow
Stack Overflow is the gold standard for Q&A-format professional community design. The accepted answer mechanic changes everything. When a question gets marked solved, that thread becomes a permanent resource. Future searchers land on it, get their answer, and leave satisfied. The reputation system rewards contribution. Users earn points for helpful answers. Those points unlock new abilities: editing posts, voting, closing questions.
What to take from this: Add a “resolved” or “accepted answer” mechanic to your community. It creates lasting value from every solved thread and ties reputation to contribution, not just seniority.
How to Choose Your Community Type
The right model depends on three questions.
What are your members coming for?
If they want to learn something together, a learning community with cohort structures and lesson-anchored discussions works best. If they want career connections and professional advancement, a professional or membership model with credential visibility and member directories is the right foundation. Match the structure to the member's primary motivation.
What are you building the community around?
A product or brand? A shared identity or profession? An outcome:- course completion, business growth, a health goal? Interest-based and support communities work well around topics and shared experiences. Learning, membership, and professional communities work best when anchored to a clear identity or outcome.
Do you need revenue directly from the community?
Free, public communities (interest-based, support, professional) work well when the community serves an adjacent goal with product support, brand loyalty, or organic growth. If the community is the product, a gated membership or subscription model is almost always the right structure. That gate funds the moderation, content, and events that make the community worth paying for.
5 Lessons Every Community Builder Can Apply
You do not need millions of members to apply what these 12 communities have figured out. Here are the five patterns that show up consistently across every example above.
1. Structure prevents confusion: Every thriving community on this list has a clear structure: categories, channels, or topic tags that tell members where to post and where to look. When members do not know where to post, they do not post.
2. Moderation is communication: Good moderation is not just enforcement, it is the visible signal that someone is maintaining this space. Pin your rules. Welcome newcomers publicly. Mark resolved threads. Members trust communities where moderation is visible.
3. Rituals create return visits: Milestone posts on Indie Hackers, accountability threads, weekly discussions on Reddit. These recurring events give members something to look forward to and a reason to come back on a schedule. Rituals turn a collection of members into a community.
4. Recognition reinforces the right behaviour: Stack Overflow's reputation system, Reddit's karma. Recognition makes contribution visible and valued. People contribute more when they know it is noticed.
5. Owned infrastructure builds trust: Several of the communities on this list have moved or been threatened by platform changes. The ones that built on infrastructure they own are not subject to algorithm changes, policy shifts, or acquisition decisions.
Build Your Own Community on Solid Foundations
The communities in this guide are different in size, topic, and platform. But the patterns that make them work are consistent: clear structure, active moderation, rituals that create return visits, and recognition that makes contribution feel worthwhile.
If you are ready to build a community that works the way the best examples on this list do, the right foundation matters. BuddyBoss gives you forums for structured searchable discussion, an activity feed for casual social interaction, groups for sub-communities, member profiles with social connections, and private messaging, all on infrastructure you own, with no algorithm deciding who sees what.
See how BuddyBoss supports every community type | View BuddyBoss plans and pricing
Frequently Asked Questions
What are some examples of online communities?
Online communities span every topic and format. Large public examples include Reddit, Stack Overflow, and LinkedIn Groups. Niche examples include Bogleheads (investing), HealthUnlocked (peer health support), and Superpath (content marketing professionals). Membership communities like Exit Five and Ali Abdaal's Part-Time YouTuber Academy show what paid community models look like in practice. The format (public or private, broad or niche) matters less than the structure and culture behind it.
What makes a successful online community?
Five traits show up consistently across successful communities: a clear purpose that members understand, active moderation that keeps discussions on track and safe, a culture of mutual help where members contribute rather than only consume, consistent activity that signals the community is alive, and a reason to return, whether that is rituals, reputation, recognition, or new content.
What type of online community is most common?
Interest-based communities are the most common. They have the lowest barrier to entry, anyone can join, and growth happens naturally as people search for topics they care about. Reddit is the most well-known example at scale, but the model applies to everything from small hobby forums to large fan communities.
