Top subreddits, ranked from a live crawl
The largest, busiest and fastest-growing communities in the Prowlo catalog. These are the subreddits we track — not a map of all of Reddit — and every number carries the date we captured it.
Largest
Updated Sep 25
r/AskReddit is the place to ask and answer thought-provoking questions.
A place for major news from around the world, excluding US-internal news.
You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.
Things that make you go AWW! -- like puppies, bunnies, babies, and so on... Feel free to post original pictures and videos of cute things.
/r/movies is the world's largest online film community, with over 37,000,000 members. Come on in and talk about movies with us!
Memes! A way of describing cultural information being shared. An element of a culture or system of behavior that may be considered to be passed from one individual to another by nongenetic means, especially imitation.
This community is a place to share and discuss new scientific research. Read about the latest advances in astronomy, biology, medicine, physics, social science, and more. Find and submit new publications and popular science coverage of current research.
A subreddit for sharing those miniature epiphanies that make the mundane more amazing.
The place for news articles about current events in the United States and the rest of the world. Discuss it all here.
This is a moderated subreddit. It is our intent and purpose to foster and encourage in-depth discussion about all things related to books, authors, genres, or publishing in a safe, supportive environment. If you're looking for help with a personal book recommendation, consult our Weekly Recommendation Thread, Suggested Reading page, or ask in r/suggestmeabook.
Reddit's main subreddit for videos. Please read the sidebar below for our rules.
Aww, cripes. I didn't know I'd have to write a description. How many words is that so far, like a hundred? Soooo, yeah. Mildly interesting stuff. Stuff that interests you. Mildly. It's in the name, ffs.
Welcome to /r/GetMotivated! We're glad you made it. This is the subreddit that will help you finally get up and do what you know you need to do. It's the subreddit to give and receive motivation through pictures, videos, text, music, AMA's personal stories, and anything and everything that you find particularly motivating and/or inspiring. So browse around, ask questions, give advice, form/join a support group. But don't spend too much time here; you've got better things to do.
Explain Like I'm Five is the best forum and archive on the internet for layperson-friendly explanations. Don't Panic!
Welcome to r/Art, a subreddit for artists and art lovers alike! We hope to create a welcoming environment for those passionate about art and hope you can find a place here! Have an issue? Please reach out to us via the ModMail where we can assist you.
I Am A, where the mundane becomes fascinating and the outrageous suddenly seems normal.
Sports News and Highlights from the NFL, NBA, NHL, MLB, MLS, NCAA, F1, and other leagues around the world.
Learn about budgeting, saving, getting out of debt, credit, investing, and retirement planning. Join our community, read the PF Wiki, and get on top of your finances!
DataIsBeautiful is for visualizations that effectively convey information. Aesthetics are an important part of information visualization, but pretty pictures are not the sole aim of this subreddit.
A subreddit devoted to the field of Future(s) Studies and evidence-based speculation about the development of humanity, technology, and civilization. -------- You can also find us in the fediverse at - https://futurology.today
Subreddit dedicated to the news and discussions about the creation and use of technology and its surrounding issues.
Photoshop contests on reddit. A place to battle using image manipulation software, play photoshop tennis, create new images from old photos, or even win reddit gold.
/r/OldSchoolCool History's cool kids, looking fantastic! A pictorial and video celebration of history's coolest kids, everything from beatniks to bikers, mods to rude boys, hippies to ravers. And everything in between. If you've found a photo, or a photo essay, of people from the past looking fantastic, here's the place to share it.
PLEASE READ OUR GUIDELINES FIRST. Nosleep is a place for redditors to share their scary personal experiences.
We are here to appreciate the awesome majesty and incredibly cool aspects of nature. 🔥 Banner done by u/esoterix_luke
New to reddit? Click here! What to post: Single purpose websites. Top-level domains. Web Tools. Minimal or beautifully designed websites. Awesome websites that offer a unique service. Rules: Aggregators/Collections - Websites that are aggregates for other content are not allowed. Sites That Are Not Unique - Not unique submissions could be websites everyone on the internet already knows about, websites that do very similar thin
Welcome to the official subreddit of the PC Master Race / PCMR! All PC-related content is welcome, including build help, tech support, and any doubt one might have about PC ownership. You don't necessarily need a PC to be a member of the PCMR. You just have to love PCs. It's not about the hardware in your rig, but the software in your heart! Join us in celebrating and promoting tech, knowledge, and the best gaming, study, and work platform there exists. The Personal Computer.
Need help with your relationship? Whether it's romance, friendship, family, co-workers, or basic human interaction: we're here to help!
r/travel is a community about exploring the world. Your pictures, questions, stories, or any good content is welcome. Please read the rules, pinned announcements and the wiki/FAQ before posting. Failure to do so may result in a removal or ban. Given the high volume of posts, there are no warnings given out. If you've never contributed positively to this subreddit (or travel-adjacent subreddits) before being banned, your chance of a successful appeal to any ban is nearly zero. Happy travels!
jugkfmghgug a comedi subreddit about mild inconveiences where every thing is perfectly spelled correctely
/r/Confession is a place to admit your wrongdoings, acknowledge your guilt, and alleviate your conscience.
Europe: 50 (+6) countries, 230 languages, 746M people… 1 subreddit.
Subreddit to discuss ChatGPT and AI. Not affiliated with OpenAI. Thanks, Nat!
A subreddit for gifs and videos that are on another level. The Next Fucking Level Please read the wiki before posting Rules: Post Appropriate Content Content posted to /r/nextfuckinglevel should represent something impressive, be it an action, an object, a skill, a moment, a fact that is above all others. Posts should be able to elicit a reaction of "that is next level" from viewers. Political content is absolutely forbidden and will result in a ban if posted. Use A Descripti
The leading community for cryptocurrency news, discussion, and analysis.
The most serious place on Reddit for Stock related discussions! Don't hesitate to tell us about a ticker we should know about, market news, or financial education. Check out our WIKI that has beginner & advanced topics on both investing & trading.
A place for the best guides, pictures, and discussions of all things related to plants and their care.
The football subreddit. For news, results, and discussion about the beautiful game.
Showing 50 of the 4,011 communities Prowlo tracks — the catalog grows daily.
Read-only · Human-in-the-loop
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What this list is, and what it isn’t
There are over a hundred thousand active subreddits. This page ranks the ones in the Prowlo catalog — currently 4,011 communities, growing every day as users add Watchers and our discovery pass finds new ones. It is not a complete census of Reddit and we are not going to pretend otherwise, because a ranking is only as good as the freshness of what sits behind it.
What you do get is numbers with a date on them. Every community here is re-checked on a rolling schedule through our own data pipeline, and every ranking states when it was captured. That matters more than it sounds: most “top subreddits” lists on the web are copies of a scrape that stopped running years ago, and several of the tools that produced them broke for good in May 2026 when Reddit started returning 403 to unauthenticated requests.
Largest, most active, fastest growing
Largest sorts by subscriber count. It is the ranking everyone asks for and the least useful one for deciding where to spend your time — subscriptions accumulate forever and never expire, so the number measures history rather than activity.
Most active sorts by posts per day sampled from each community’s newest posts on Reddit — the real span those posts cover, not a rounded window. This is the ranking to look at if you are choosing communities to participate in: it tells you where conversation is actually happening, and how fast the front page turns over.
Fastest growing compares each community’s current subscriber count against the nearest snapshot around 30 days back. It needs real history to exist, so it stays gated until we have it rather than extrapolating from a few days of data.
The size filters exist because ranking a 5,000-member community against r/AskReddit is meaningless. Filtering to 10K–100K is where most of the genuinely useful communities for founders and marketers live — big enough that people are reading, small enough that a good answer stays on the page for more than an hour.
Don’t pick your subreddits from a top-N list
This page is useful for orientation and for settling arguments about which community is bigger. It is a bad way to choose where to post. The largest communities are also the most saturated, the most heavily moderated, and the ones where every competitor in your category has already tried the same thing. A comment in a subreddit posting a thousand times a day is visible for minutes.
Start from your niche instead. Describe your product in the subreddit finder, check each match’s activity and promo tolerance, then expand the shortlist with shared-audience neighbors. Watch the ones that survive that filter and let your agent monitor them over MCP — where these rankings are a tool call away too: catalog_top_subreddits, free.
Frequently asked questions
What is the biggest subreddit?
Across Reddit as a whole, r/funny, r/AskReddit and r/gaming have traded the top spot for years, each with tens of millions of subscribers. The ranking on this page is narrower and more honest about it: it covers the communities in the Prowlo catalog, ordered by the member counts from our own crawl, so the numbers carry a capture date instead of being copied from a years-old scrape.
How many subscribers does r/AskReddit have?
It is one of the handful of default-tier communities in the tens of millions, and we are not going to quote you a precise figure we have not measured. If r/AskReddit appears in the list above, the number shown is what our own crawl recorded, with the capture date next to it. Raw size is also the least useful thing about it: a comment in a subreddit that posts thousands of times a day stays visible for minutes.
What does "most active" rank by?
Posts per day, sampled from each community's own newest posts on Reddit — the real span those posts cover, not a rounded window — with subscriber count as the tiebreaker. Samples older than two weeks are treated as unmeasured, and unsampled communities sort last. It is a much better guide than subscriber count to whether a community is alive — plenty of million-member subreddits post less than a hundred-thousand-member one.
Why is fastest-growing sometimes unavailable?
Growth rankings need at least 30 days of our own snapshot history for a meaningful number of communities. Rather than compute a growth rate from two points a few days apart and present it as a monthly trend, we show you the date tracking started and ask you to come back. It is the same reason every growth figure on the site is labelled with its real day-span.
How many subreddits does Prowlo track?
4,011 active communities, and the catalog grows daily as users add Watchers and our discovery pass finds new ones. NSFW, private, banned and unreachable subreddits are excluded by design, so this is not a complete map of Reddit — it is the slice we can crawl reliably and keep current.
Can my AI agent read these rankings?
Yes. The same rankings are exposed through Prowlo's MCP server as catalog_top_subreddits — largest, most active, or fastest growing, filterable by size band, free and unmetered. Connect your agent to api.prowlo.com/mcp and it can browse the field, vet a candidate with catalog_get_subreddit, and start watching it in one conversation.
How do I find subreddits for my own niche?
A top-N list is a poor targeting tool — the biggest communities are the most saturated and the hardest to be useful in. Use the subreddit finder instead: describe your product or audience and get matched to the communities that discuss it, then filter by posting activity and promo tolerance.
More free Prowlo tools
Subreddit Finder
Find subreddits by describing your product
Similar Subreddits
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Subreddit Stats
Live stats for any subreddit
Reddit Search Builder
Operators, users, flair and dates
AI Writing Checker
Spot the tells before you post
Comment Humanizer
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Reddit MCP Server
Give your AI agent Reddit access