r/Fantasy vs r/worldbuilding

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/Fantasy Related to r/worldbuilding

Fantasy reading room vs worldbuilding craft room

r/Fantasy’s public description is a large discussion forum for speculative fiction — fantasy, science fiction, horror, alt history and more. r/worldbuilding describes a DIY room for creating new worlds and universes across art, writing, games and science.

In our directory, Fantasy is larger (about 4.0M, rank #240) than worldbuilding (about 1.9M, rank #571). Activity samples show worldbuilding posting more often (~95 posts/day vs ~54). Fantasy’s sample is text-forward with review, bingo and book-club flairs; worldbuilding’s sample mixes text with images/galleries and uses lore, question, discussion, visual and map flairs. Our directory lists each name among the other’s related communities.

Rule titles: Fantasy emphasizes kindness, limits promotional/karma farming, spoilers and piracy, and steers writing/publishing discussion; worldbuilding requires worldbuilding context, effort, DIY ethos and careful NSFW handling. SubMouse already compares worldbuilding with writing; this pair is fandom reading versus world creation. Note: a Fantasy-vs-scifi curated page is intentionally not offered here because r/scifi’s public blurb currently trips a safe-directory token filter.

Choose r/Fantasy for speculative-fiction reading and fandom talk under its kindness and anti-promo rules.
Choose r/worldbuilding to invent settings, maps and lore under its context-and-effort rules.
Both sit outside the current Top 100 cut. worldbuilding-vs-writing is a separate curated page.

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

r/Fantasy

Reddit Fantasy

r/Fantasy is the internet's largest discussion forum for the greater Speculative Fiction genre. Fans of fantasy, science fiction, horror, alt history, and more can all find a home with us. We welcome respectful dialogue…

Members: 4M
7-day growth: +1.6K
Posts/day: 53.8
Directory rank: #240
Created: Jul 29, 2008
Submissions: Text or links

Sample mix: text posts 72%, links 13%, images 10%

Topics: Fantasy & Sci-Fi Books

Rule titles (short names we collected)

Be Kind
Promotional Content & Karma Farming
Posting Etiquette
Hide Spoilers
No Pirated Content
Audio/Visual Media & Other Content
Articles, Blogs, & Reviews
Writing & Publishing Discussion
Placeholder Rule for Reporting Purposes

Open r/Fantasy on SubMouse

r/worldbuilding

Worldbuilding - Explore Every Impossibility

For artists, writers, gamemasters, musicians, programmers, philosophers and scientists alike! The creation of new worlds and new universes has long been a key element of speculative fiction, from the fantasy works of To…

Members: 1.9M
7-day growth: +1.8K
Posts/day: 94.9
Directory rank: #571
Created: Nov 23, 2009
Submissions: Text or links

Sample mix: text posts 52%, images 21%, galleries 18%

Rule titles (short names we collected)

Be kind to others and respect our purpose.
All posts should include worldbuilding context.
Put in some effort.
This is a DIY community.
We allow non-disruptive advertising.
The Full and Comprehensive List of Rules

Open r/worldbuilding on SubMouse

Supported differences

Aspect	r/Fantasy	r/worldbuilding
Public focus (from each community’s public description)	r/Fantasy is the internet's largest discussion forum for the greater Speculative Fiction genre. Fans of fantasy, science fiction, horror, alt history, and more can all find a home with us. We welcome respectful dialogue…	For artists, writers, gamemasters, musicians, programmers, philosophers and scientists alike! The creation of new worlds and new universes has long been a key element of speculative fiction, from the fantasy works of To…
Size r/Fantasy is larger in our directory (about 2×).	4M members	1.9M members
Posting activity (our sample)	53.8/day	94.9/day
Common post types in our sample	text posts 72%, links 13%, images 10%	text posts 52%, images 21%, galleries 18%
Topic tags on SubMouse	Fantasy & Sci-Fi Books	n/a
Selected rule titles (short names we collected)	Be Kind; Promotional Content & Karma Farming; Posting Etiquette; Hide Spoilers; No Pirated Content	Be kind to others and respect our purpose.; All posts should include worldbuilding context.; Put in some effort.; This is a DIY community.; We allow non-disruptive advertising.

What they share

Our directory lists each of these communities on the other’s related list.

Rules and posting patterns we can verify

Fantasy short titles include: be kind; promotional content and karma farming; posting etiquette; hide spoilers; no pirated content; audio/visual media and other content; articles/blogs/reviews; writing and publishing discussion. Our sample flairs include review, bingo and book club.

worldbuilding: be kind and respect our purpose; all posts should include worldbuilding context; put in some effort; this is a DIY community; NSFW content requires special care; non-disruptive advertising allowed. Our sample flairs include lore, question, discussion, visual and map.

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. Mutual related-list links. Short titles only. Related curated page: worldbuilding-vs-writing.

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.