About r/FanTheories
In its own words:
This is a place for fans of various creative works to share theories, interpretations and speculation related to that particular creative work.
Community guide
r/FanTheories (#365, about 3.0 million) is where fans share theories, interpretations, and speculation about creative works. Rules demand evidence, the media name in the title, spoiler tags, flairs, and a written theory—not just an external link. All-text sample (~4.1 ppd).
Evidence + media name
Name the work in the title, flair the post, tag spoilers, and back the claim with evidence—low-effort one-liners get removed.
Creative works only
Theories must be about creative works; confirmed-theory and high-volume topic standards also appear in the rule list.
Versus general fandom chatter
Show discussion subs often tolerate hot takes without sources. Here the write-up-plus-evidence bar is the differentiator.
SubMouse Editorial
The community was created on May 30, 2012, which makes it 14 years old. Since Oct 26, 2026, it has gained 314 subscribers (+0.01%). It sits just behind r/budgetfood (#364) and ahead of r/educationalgifs (#366) in our ranking.
What sets r/FanTheories apart
Compared with other large communities, r/FanTheories leans heavily on text posts (100% of recent posts; the typical Top 100 subreddit sits at 35%). Relative to its huge audience, posting is calm — around 1.4 new posts a day per million members, which puts it in the quietest fifth of the Top 100. A good post has less competition here.
Subscriber growth
Between Sep 19, 2026 and Nov 2, 2026, r/FanTheories climbed from 2,987,028 to 2,988,960 subscribers (+1.9K, +0.06%). That is about 44 new members per day. The chart uses our weekly snapshots (9 so far), so it gets longer every week.
What r/FanTheories talks about
Looking at the titles of 34 recent posts (Oct 29–Nov 4), the words that come up most are “theory”, “mass”, “devil”, “trying” and “spy”. Other frequent themes are family, forger, secretly, investigating, three and different. Recurring phrases include “spy family”, “forger family”, “secretly investigating” and “investigating three”. By format, 100% are text posts.
Popular post flairs: FanTheory (25), FanSpeculation (2), Question (1).
Activity and best time to post
r/FanTheories gets about 4.1 new posts a day. The public archive holds 80,159 posts and 1,215,945 comments in total, about 15.2 comments per post.
Rules of r/FanTheories
The moderators of r/FanTheories list 12 rules. In short:
- Don't be a jerk
- Please provide evidence
- Theories must be about creative works
- Tag all spoilers
- Add the media name to your title
- No low effort posts
- Write up your theory w/ external link
- Unapproved advertising
- Posts must be flaired
- Question and theory requests
How to join
Open reddit.com/r/FanTheories and press “Join”. Read the community rules in the sidebar before you post: every subreddit is run by its own volunteer moderators.
Frequently asked questions
How many subscribers does r/FanTheories have?
r/FanTheories has 2,988,960 subscribers (Nov 2, 2026), which makes it the #365 safe-for-work subreddit in the SubMouse ranking. It added 1,932 members between Sep 19, 2026 and Nov 2, 2026.
When was r/FanTheories created?
r/FanTheories was created on May 30, 2012, so it has been around for 14 years.
Is r/FanTheories still active?
Yes. r/FanTheories gets about 4.1 new posts a day (average of the last four weeks). Over its lifetime the archive counts 80,159 posts and 1,215,945 comments.
What kind of posts are on r/FanTheories?
The community describes itself as: “This is a place for fans of various creative works to share theories, interpretations and speculation related to that particular creative work.” Recent post titles often mention theory, mass, devil, trying and spy. Most posts are text posts (100%).
Is r/FanTheories SFW?
Yes. Reddit does not mark r/FanTheories as an 18+ (NSFW) community. SubMouse lists safe-for-work subreddits only.
What are the rules of r/FanTheories?
Join the community on Reddit first, then use “Create post”. r/FanTheories accepts text posts only, with galleries enabled. It has 12 posted rules, starting with: “Don't be a jerk”; “Please provide evidence”; “Theories must be about creative works”. Moderators remove posts that break the rules, so read them in the sidebar before posting.
What subreddits are similar to r/FanTheories?
Communities with similar topics include r/rickandmorty (2.9M), r/Futurology (21.7M), r/zelda (3.3M), r/antiwork (3M) and r/spacex (3.7M).
Stats from public data (data updated Nov 2, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026). Point and comment counts are archive snapshots and can be lower than on Reddit today. SubMouse is an independent directory and is not affiliated with Reddit or the moderators of r/FanTheories.