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r/AMA vs r/IAmA

Side-by-side using public descriptions, members, growth and rule titles from SubMouse. Missing fields show as n/a. Adult communities are excluded.

Swap sides New comparison Related to r/AMA Related to r/IAmA

IAmA room vs AMA room

r/IAmA hosts large Ask Me Anything interviews. r/AMA is a smaller general AMA community.

In our directory, IAmA is larger (about 22.5M, rank #30) than AMA (about 1.9M, rank #589). Activity samples show AMA posting more often (~80 posts/day vs ~3.3). Both samples are mostly text. IAmA flairs include Crosspost; AMA shows Restricted Post, *VERIFIED*.

Rule titles: IAmA: All posts must contain proof; Topics must follow IAmA guidelines; Requests belong in /r/IAmARequests; Top-level comments must ask a question; Do not ask for personal favors from an OP; No abusive or harassing comments; Please See Our FAQ. AMA: Harassment/Hate/Bigotry not allowed; Posts must be AMAs; AMA commenters must ask questions; AMA posters must answer questions in their threads; Post Quality; NSFW content is prohibited unless prior approval is obtained; Long and Controversial Opinions; No fake stories.

Choose r/IAmA for high-visibility AMAs under its proof and hosting rules.
Choose r/AMA for smaller or niche AMAs under its community rules.
IAmA is far larger in our directory.

Written comparison based on public descriptions and rule titles · updated 2026-11-07.

r/AMA

Ask Me Anything

Have anything interesting or unique to share about yourself? Let people ask you anything.

Members: 1.9M
7-day growth: +3.6K
Posts/day: 80
Directory rank: #589
Created: Aug 10, 2009
Submissions: Text posts

Sample mix: text posts 97%, links 3%

Topics: Explanations & Q&A

Rule titles (short names we collected)

Harassment/Hate/Bigotry not allowed
Posts must be AMAs
AMA commenters must ask questions
AMA posters must answer questions in their threads
Post Quality
Long and Controversial Opinions
No fake stories

Open r/AMA on SubMouse

r/IAmA

IAmA

I Am A, where the mundane becomes fascinating and the outrageous suddenly seems normal.

Members: 22.5M
7-day growth: +806
Posts/day: 3.3
Directory rank: #30
Created: May 27, 2009
Submissions: Text or links

Sample mix: text posts 100%

Rule titles (short names we collected)

All posts must contain proof
Topics must follow IAmA guidelines
Requests belong in /r/IAmARequests
Top-level comments must ask a question
Do not ask for personal favors from an OP
No abusive or harassing comments
Please See Our FAQ

Open r/IAmA on SubMouse

About this community: r/IAmA (#30, about 22.5 million) hosts AMAs—every post needs proof, topics must follow IAmA guidelines, and top-level comments must ask questions. Requests belong in r/IAmARequests. Low volume (~3.3 ppd).

Supported differences

Aspect	r/AMA	r/IAmA
Public focus (from each community’s public description)	Have anything interesting or unique to share about yourself? Let people ask you anything.	I Am A, where the mundane becomes fascinating and the outrageous suddenly seems normal.
Size r/IAmA is larger in our directory (about 11.9×).	1.9M members	22.5M members
Posting activity (our sample)	80/day	3.3/day
Common post types in our sample	text posts 97%, links 3%	text posts 100%
Allowed submission type (meta)	Text posts	Text or links
Topic tags on SubMouse	Explanations & Q&A	n/a
Selected rule titles (short names we collected)	Harassment/Hate/Bigotry not allowed; Posts must be AMAs; AMA commenters must ask questions; AMA posters must answer questions in their threads; Post Quality	All posts must contain proof; Topics must follow IAmA guidelines; Requests belong in /r/IAmARequests; Top-level comments must ask a question; Do not ask for personal favors from an OP

Rules and posting patterns we can verify

IAmA short titles include: All posts must contain proof; Topics must follow IAmA guidelines; Requests belong in /r/IAmARequests; Top-level comments must ask a question; Do not ask for personal favors from an OP; No abusive or harassing comments; Please See Our FAQ.

AMA: Harassment/Hate/Bigotry not allowed; Posts must be AMAs; AMA commenters must ask questions; AMA posters must answer questions in their threads; Post Quality; NSFW content is prohibited unless prior approval is obtained; Long and Controversial Opinions; No fake stories.

Where this comparison comes from

Public descriptions and member counts from SubMouse’s safe-for-work directory. Short rule titles and activity samples SubMouse collected. Short titles only.

Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and post-type mixes appear when we have an activity sample. Rule lines are short titles, not the full sidebar. Directory rank is listing order — communities outside the current Top 100 open in the info tool instead of a full community page.

Comparisons we prepared

Hand-written explanations for pairs where the public descriptions and rules support a real distinction:

r/gardening vs r/houseplants — Outdoor plots and broad plant care versus indoor houseplant focus.
r/programming vs r/learnprogramming — Link-heavy programming news vs beginner question threads.
r/AskReddit vs r/NoStupidQuestions — Open-ended discussion prompts versus straightforward factual questions.
r/Cooking vs r/Baking — Stovetop technique discussion versus bake-share recipes and photos.
r/personalfinance vs r/Frugal — Budgeting and long-term money planning versus everyday frugality habits.
r/travel vs r/solotravel — General trip planning and photos versus solo-travel experiences and advice.
r/books vs r/suggestmeabook — In-depth book discussion versus dedicated recommendation requests.
r/suggestmeabook vs r/booksuggestions — Two recommendation rooms—similar job, different size and house rules.
r/pcmasterrace vs r/buildapc — PC culture, news and flex photos versus structured custom-build advice.
r/Art vs r/drawing — Serious art showcase with strict presentation rules versus a broader drawing practice room.
r/science vs r/askscience — Sharing new peer-reviewed research versus asking experts science questions.
r/explainlikeimfive vs r/NoStupidQuestions — Layperson explanations with strict answer rules versus a wider anonymous Q&A net.
r/personalfinance vs r/povertyfinance — Mainstream budgeting and investing help versus guidance aimed at financial hardship.
r/Games vs r/gaming — Newsy, informative games coverage versus a huge general gaming feed.
r/Coffee vs r/espresso — Wide coffee talk versus espresso-machine technique and gear.
r/photography vs r/itookapicture — Gear and technique discussion versus posting your own photos for critique.
r/dating_advice vs r/relationship_advice — Early dating situations versus advice on ongoing relationships between people.
r/hiking vs r/CampingandHiking — Day-hike photos and talk versus backpacking with overnight gear.
r/malefashionadvice vs r/femalefashionadvice — Parallel fashion-advice communities split by audience focus—not identical twins.
r/SkincareAddiction vs r/AsianBeauty — Science-leaning general skincare versus Asian beauty brands and routines.
r/Fitness vs r/bodyweightfitness — General gym-and-goals fitness discussion versus training with bodyweight progressions.
r/loseit vs r/Fitness — Sustainable weight-loss support versus general physical fitness goals and training.
r/DIY vs r/HomeImprovement — Show-your-work DIY projects versus text-only home improvement questions.
r/history vs r/AskHistorians — Casual history discussion and articles versus strictly moderated historical Q&A.
r/news vs r/worldnews — US-and-world news articles versus major world news that excludes US-internal stories.
r/Music vs r/listentothis — Broad music community posts versus discovery posts that stay under a popularity threshold.
r/writing vs r/WritingPrompts — Craft-of-writing discussion versus prompt-driven short stories and poems.
r/tipofmytongue vs r/whatisthisthing — Naming a half-remembered title or phrase versus identifying a mysterious physical object.
r/BuyItForLife vs r/Frugal — Durable long-life products versus everyday frugality and resourcefulness.
r/Parenting vs r/Mommit — All-parents child-rearing discussion versus a moms-only support room for the messier details.
r/LifeProTips vs r/YouShouldKnow — Actionable life tips versus facts framed as things you should know.
r/camping vs r/backpacking — Tent and campsite camping versus wilderness or travel backpacking with trip write-ups.
r/cscareerquestions vs r/learnprogramming — Tech career navigation versus learning to program in any language.
r/technology vs r/gadgets — Technology news and surrounding issues versus posts about a single gadget.
r/food vs r/EatCheapAndHealthy — Original food photography versus budget-friendly healthy recipes with text.
r/running vs r/AdvancedRunning — All-levels running discussion versus advanced training mindset and race tactics.
r/slowcooking vs r/Cooking — Crock-Pot style slow-cooker recipes versus general cooking discussion and recipes.
r/nba vs r/Basketball — NBA league news and discussion versus playing and watching basketball across leagues.
r/buildapc vs r/buildapcsales — Custom PC build planning advice versus PC-part deal links.
r/Breadit vs r/Baking — Homemade bread baking versus cakes, cookies, pies and general baking.
r/dogs vs r/Dogtraining — Responsible dog ownership discussion versus dedicated training and behavior help.
r/malefashionadvice vs r/frugalmalefashion — Men’s style advice and outfits versus male-fashion deals and coupons.
r/SkincareAddiction vs r/30PlusSkinCare — General science-leaning skincare versus skincare discussion aimed at people over 30.
r/OutOfTheLoop vs r/NoStupidQuestions — Catching up on a current meme or news loop versus asking any straightforward question.
r/space vs r/Astronomy — Space science and exploration news versus amateur astronomy observing and gear.
r/relationships vs r/relationship_advice — Structured interpersonal advice with question-type rules versus a high-volume room for specific situations.
r/gaming vs r/pcgaming — Broad gaming posts and memes-with-limits versus PC gaming news and discussion.
r/Europetravel vs r/travel — Europe-specific trip questions and stories versus worldwide travel discussion.
r/webdev vs r/javascript — Front- and back-end web development discussion versus JavaScript language and project talk.
r/Frugal vs r/povertyfinance — Waste-less frugal living habits versus money help for people struggling financially.
r/homestead vs r/gardening — Self-sufficiency, livestock and country life versus plant growing and care.
r/woodworking vs r/DIY — Woodworking and furniture making versus all kinds of DIY projects and repairs.
r/boardgames vs r/rpg — Modern board games news and discussion versus tabletop roleplaying games.
r/keto vs r/loseit — Ketogenic low-carb eating versus weight loss through any sustainable method.
r/changemyview vs r/unpopularopinion — Willingness-to-revise debate versus broadcasting an unpopular take.
r/Android vs r/iphone — Android platform news/tips versus iPhone enthusiast discussion.
r/cars vs r/MechanicAdvice — Enthusiast news and projects versus repair troubleshooting help.
r/Python vs r/learnpython — Python language hub versus learner Q&A helpdesk.
r/Jokes vs r/dadjokes — General joke threads versus dad-joke puns and groaners.
r/mildlyinteresting vs r/interestingasfuck — Quietly notable original photos versus content that aims to be truly striking.
r/Futurology vs r/technology — Evidence-leaning futures discussion versus technology news and surrounding issues.
r/movies vs r/television — Film news and discussion versus scripted television programming talk.
r/LifeProTips vs r/lifehacks — Actionable LPT-format advice versus uncommon physical-style life hacks.
r/AmItheAsshole vs r/relationship_advice — Moral-judgment verdicts on a conflict versus specific advice for a real relationship situation.
r/anime vs r/manga — Animated anime discussion versus manga (and manhwa/manhua) reading talk.
r/dating vs r/dating_advice — General dating discussion and venting versus situation-specific dating advice.
r/investing vs r/stocks — Broader investing discussion versus ticker- and market-focused stock talk.
r/AskMen vs r/AskWomen — Questions aimed at men’s experiences versus questions aimed at women’s perspectives.
r/MakeupAddiction vs r/SkincareAddiction — Makeup looks, products and questions versus science-leaning skincare routines.
r/streetwear vs r/malefashionadvice — Streetwear fit photos and discussion versus broader men’s fashion advice.
r/offmychest vs r/TrueOffMyChest — Supportive emotional sharing versus a stricter personal off-my-chest format.
r/hockey vs r/nhl — All-hockey discussion including leagues beyond the NHL versus NHL-focused news and talk.
r/astrophotography vs r/Astronomy — Amateur sky photos with gear notes versus broader astronomy discussion and learning.
r/CryptoCurrency vs r/Bitcoin — Multi-coin crypto news and discussion versus Bitcoin-only focus.
r/MadeMeSmile vs r/UpliftingNews — Feel-good images and videos versus positive news article links.
r/xxfitness vs r/Fitness — Fitness discussion centered on women and gender-diverse lifters versus the general Fitness wiki room.
r/smallbusiness vs r/Entrepreneur — Q&A for owning a small business versus broader entrepreneurship discussion.
r/Mommit vs r/daddit — Moms’ parenting support versus dads’ parenting support.
r/Damnthatsinteresting vs r/interestingasfuck — High-interest media shares versus “interesting as fuck” media shares—overlapping curiosity feeds with different rule bars.
r/getdisciplined vs r/productivity — Self-discipline accountability and methods versus productivity tips and tools.
r/financialindependence vs r/personalfinance — FIRE and financial independence goals versus everyday personal-finance budgeting and debt help.
r/learnart vs r/Art — Practice, feedback and learning resources versus a serious gallery of finished art.
r/soccer vs r/PremierLeague — Global football news and discussion versus English Premier League focus.
r/nfl vs r/fantasyfootball — NFL news and game talk versus fantasy-football strategy and roster advice.
r/sidehustle vs r/Entrepreneur — Extra income beside a full-time job versus broader entrepreneurship and startup talk.
r/careerguidance vs r/jobs — Career-path questions and advice versus job-search, interview and workplace threads.
r/legaladvice vs r/law — Personal legal questions versus news and discussion of the legal profession.
r/homeowners vs r/RealEstate — Living-in-the-house problems and vents versus buying, selling and investing talk.
r/EDM vs r/electronicmusic — Electronic dance music discovery and discussion versus a broader electronic-music room.
r/headphones vs r/audiophile — Portable cans, DACs and headphone amps versus home stereo and speaker-focused audiophile talk.
r/anime vs r/Animesuggest — General anime news and discussion versus dedicated what-to-watch suggestion requests.
r/whatsthisplant vs r/gardening — Plant identification photo requests versus growing, care and garden discussion.
r/MakeupAddiction vs r/Makeup — Makeup looks, hauls and product showcases versus a text-first tips-and-questions room.
r/selfimprovement vs r/getdisciplined — Broad self-improvement questions versus methods and plans for building discipline.
r/writing vs r/Screenwriting — General writing-craft discussion versus film and TV screenwriting craft and feedback.
r/Meditation vs r/yoga — Sitting meditation practice and insight versus yoga asana, lifestyle and community discussion.
r/cats vs r/dogs — Cat pictures, videos and light advice versus text-first responsible dog ownership discussion.
r/tea vs r/Coffee — Camellia sinensis and tea culture discussion versus coffee brewing, gear and community talk.
r/Guitar vs r/piano — Guitar gear, lessons and play videos versus piano practice, digital-piano help and performances.
r/analog vs r/photography — Film-photography shares with camera/film metadata versus digital-era photography discussion and technique.
r/MachineLearning vs r/datascience — Research-leaning machine-learning discussion versus professional data-science career and practice talk.
r/MealPrepSunday vs r/EatCheapAndHealthy — Batch meal-prep photos and planning versus eating healthy food on a tight budget.
r/femalelivingspace vs r/malelivingspace — Living-space tours and décor help framed for women versus living-space tours and advice framed for men.
r/worldbuilding vs r/writing — Invented worlds, lore and maps versus prose craft discussion for writers.
r/whatsthisbug vs r/whatisthisthing — Insect and spider identification versus general mysterious-object identification.
r/UKPersonalFinance vs r/personalfinance — UK pounds-and-pence personal finance versus the large US-leaning personal-finance wiki room.
r/crossfit vs r/Fitness — CrossFit methodology and sport discussion versus the broad Fitness wiki and programming room.
r/Justrolledintotheshop vs r/MechanicAdvice — Shop-floor “look what rolled in” war stories versus practical troubleshooting advice from mechanics.
r/Physics vs r/AskPhysics — Physics community for physicists and students versus a dedicated ask-a-physics-question room.
r/InteriorDesign vs r/architecture — Interior design and interior architecture of spaces versus architecture of buildings and practice.
r/beermoney vs r/sidehustle — Microtask and online beer-money sites versus broader side-hustle income beside a full-time job.
r/AskCulinary vs r/Cooking — Single-answer culinary technique questions versus broader cooking discussion and recipes.
r/DIY vs r/somethingimade — How-to DIY help and home projects versus showcasing finished handmade crafts you made.
r/homeautomation vs r/smarthome — DIY home-automation projects and setups versus smart-home product and platform help.
r/TrueCrime vs r/UnresolvedMysteries — True-crime discussion and media versus unresolved cases, disappearances and open mysteries.
r/comics vs r/comicbooks — Print comics, strips and webcomics (including OC) versus comic-book fandom discussion.
r/ZeroWaste vs r/Anticonsumption — Practical zero-waste living tips versus critique of consumerism and overconsumption.
r/Documentaries vs r/movies — Free documentary links and discussion versus general film news and movie talk.
r/nutrition vs r/loseit — Nutrition science discussion versus sustainable weight-loss community support.
r/graphic_design vs r/Design — Graphic-design education and critique versus broader design discussion and work shares.
r/blender vs r/3Dmodeling — Blender-specific showcase and help versus general 3D modeling across tools.
r/Jazz vs r/classicalmusic — Jazz listening and discussion versus classical music discussion and recommendations.
r/PersonalFinanceCanada vs r/personalfinance — Canada-specific personal finance versus the large US-leaning personal finance community.
r/Watercolor vs r/painting — Watercolor-specific painting and critique versus general painting gallery discussion.
r/simpleliving vs r/minimalism — Simple-living lifestyle discussion versus minimalism as intentional simplicity.
r/flexibility vs r/yoga — Stretching and mobility progress versus yoga practice and lifestyle discussion.
r/ThriftStoreHauls vs r/Frugal — Showing thrift and secondhand finds versus frugal living strategy discussion.
r/FrugalFemaleFashion vs r/femalefashionadvice — Budget women’s fashion deals and discussion versus broader female fashion advice.
r/Fantasy vs r/worldbuilding — Speculative-fiction reading and fandom discussion versus creating fictional worlds.
r/DigitalPainting vs r/drawing — Critique-focused digital painting versus general drawing shares across media.
r/oilpainting vs r/painting — Real oil-paint shares and technique versus general painting gallery discussion.
r/skiing vs r/snowboarding — Alpine skiing discussion versus snowboarding (Shreddit) gear, riding and travel questions.
r/startrek vs r/StarWars — Welcoming Star Trek discussion versus the large unofficial Star Wars franchise community.
r/formula1 vs r/NASCAR — Independent Formula 1 race discussion versus NASCAR news and race-day threads.
r/Meditation vs r/Mindfulness — Meditation practice experiences versus mindfulness as everyday awareness.
r/travel vs r/TravelHacks — General travel questions and trip reports versus cheap-travel tips and logistics hacks.
r/grilling vs r/smoking — Cooking over direct fire versus low-and-slow wood-smoke flavor techniques.
r/mlb vs r/baseball — Major League Baseball–only news and discussion versus broader baseball covering other leagues too.
r/Bitcoin vs r/BitcoinBeginners — Main Bitcoin discussion versus a beginners-only questions room with strict anti-scam norms.
r/todayilearned vs r/explainlikeimfive — Sourced “today I learned” fact posts versus simplified how-it-works explanations.
r/IAmA vs r/AMA — Large Ask Me Anything interview community versus a smaller general AMA room.
r/politics vs r/PoliticalDiscussion — High-volume political news links versus civility-focused political discussion threads.
r/DnD vs r/rpg — Dungeons & Dragons–specific posts versus broader tabletop RPG discussion across systems.
r/truegaming vs r/ShouldIbuythisgame — In-depth game discussion versus platform-tagged “should I buy this?” purchase advice.
r/TooAfraidToAsk vs r/NoStupidQuestions — Sensitive questions people hesitate to ask versus a huge anonymous general Q&A room.
r/options vs r/investing — Exchange-traded options strategies versus broader investing discussion (not personal-finance advice).
r/CreditCards vs r/personalfinance — Credit-card product discussion versus broad personal-finance budgeting and planning.
r/crochet vs r/sewing — Crochet finished objects and WIPs versus sewing projects, alterations and machine questions.
r/NintendoSwitch vs r/nintendo — Nintendo Switch (and Switch 2) news and questions versus broader Nintendo past-present-future discussion.
r/cycling vs r/bicycling — Text-only bike discussion versus a photo-friendly community for riders of every level.
r/PS5 vs r/playstation — PS5 news and discussion hub versus the casual PlayStation community for images, trophies and chat.
r/europe vs r/AskEurope — Link-based European news and data versus text questions to Europeans about their countries.
r/Cooking vs r/recipes — Text cooking discussion and questions versus a recipe-sharing feed with a required post format.
r/Cooking vs r/cookingforbeginners — General cooking discussion versus a no-gatekeeping room for people learning to cook.
r/Entrepreneur vs r/startups — Business-building discussion of every size versus companies designed to scale rapidly.
r/japan vs r/JapanTravel — General Japan news and discussion (no tourist posts) versus trip planning and travel tips for Japan.
r/marvelstudios vs r/Marvel — Marvel Studios films, series and the MCU versus Marvel Comics and its characters.
r/apple vs r/mac — Discussion of Apple as a whole (no tech support) versus a Mac-only community that takes questions.
r/legaladvice vs r/LegalAdviceUK — Simple legal questions (location required) versus UK-only legal triage for England, Wales, Scotland and Northern Ireland.
r/travel vs r/Shoestring — General travel questions and trip reports versus budget travel, cheap destinations and deals.
r/AskUK vs r/unitedkingdom — Questions about UK life and culture versus UK news, politics and society links.
r/stocks vs r/StockMarket — Serious stock and company discussion with position disclosure versus short- and mid-term trade ideas and market commentary.
r/pokemon vs r/pokemongo — Pokémon across games, shows, cards and art versus Pokémon GO, Niantic’s mobile game.
r/Minecraft vs r/Minecraftbuilds — The main Minecraft community for help, discussion and news versus a showcase for completed builds.
r/movies vs r/MovieSuggestions — Film news and discussion versus a room for requesting and giving movie recommendations.
r/college vs r/ApplyingToCollege — College life once you’re there versus admissions questions before you get in.

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