r/rational

Community Overview
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About r/rational

A place for discussion of rational fiction.

The community at a glance

r/rational is a Subreddit for Forecasters with roughly 29K members. It has been around since 2014. It uses a forum format for communication. It is the 5th largest community in the Prediction Markets topic page.

Roughly 2K members have joined in the past year. Popular discussion topics include Super Supportive, Thread, and D.

On Reddit
Established 2014
29K Members

Community Topics

Community Features

Forum

This community has a forum

Subreddit Analysis

via GummySearch
Yearly: +2K members
Growth: +7.1% / year

Member growth over time

All time (yearly)

  • 2013: 224 members
  • 2014: 2K members
  • 2015: 2K members
  • 2016: 2K members
  • 2017: 2K members
  • 2018: 3K members
  • 2019: 5K members
  • 2020: 4K members
  • 2021: 2K members
  • 2023: 2K members
  • 2024: 2K members
  • 2025: 2K members
  • 2026: 2K members

Past year (monthly)

  • Nov: 162 members
  • Dec: 153 members
  • Jan: 224 members
  • Feb: 181 members
  • Mar: 174 members
  • Apr: 160 members
  • May: 159 members
  • Jun: 194 members
  • Jul: 153 members
  • Aug: 167 members
  • Sep: 96 members
  • Oct: 76 members

Topics

  • Super Supportive
    64 posts in the past month
    #1
    Super Supportive
    64
  • Thread
    60 posts in the past month
    #2
    Thread
    60
  • D
    47 posts in the past month
    #3
    D
    47
  • Chapter
    34 posts in the past month
    #4
    Chapter
    34
  • Thresholder
    30 posts in the past month
    #5
    Thresholder
    30

Flair

  • RT
    5 posts in the past month
    1. [RT] [C] [HSF] White Fountain — a story about speedrunning a dream exploit
    2. [RT][C] "Fall" (2022 Film): When two best friends who climb a 2,000-foot-tall television broadcasting tower become stranded at the top, it is up to them to think of a way out.
    3. [RT] The Rounding Error
    #1
    RT
    [RT] [C] [HSF] White Fountain — a story about speedrunning a dream exploit · [RT][C] "Fall" (2022 Film): When two best friends who climb a 2,000-foot-tall television broadcasting tower become stranded at the top, it is up to them to think of a way out. · [RT] The Rounding Error
    5
  • META
    3 posts in the past month
    1. What would a reincarnator be diagnosed with?
    2. Writing Period has begun for Rational Fiction Fest 2026!
    3. Rational Fiction Fest 2026 Begins Now - Prompting Open!
    #2
    META
    What would a reincarnator be diagnosed with? · Writing Period has begun for Rational Fiction Fest 2026! · Rational Fiction Fest 2026 Begins Now - Prompting Open!
    3
  • WIP
    3 posts in the past month
    1. To the Stars, Chapter 76: "Straying from the Light, Part One"
    2. 🦄 Deconstructing the Cliche: A Systemic Analysis of the Unicorn
    3. [Theory] The Agency Simulator Framework: Is the conscious "self" just an offline evolutionary sandbox for social prediction?
    #3
    WIP
    To the Stars, Chapter 76: "Straying from the Light, Part One" · 🦄 Deconstructing the Cliche: A Systemic Analysis of the Unicorn · [Theory] The Agency Simulator Framework: Is the conscious "self" just an offline evolutionary sandbox for social prediction?
    3
  • SPOILERS
    3 posts in the past month
    1. Rational Avengers: Endgame
    2. Worth the Candle: did spoiler go to spoiler?
    3. Would you consider Elon Musk a rationalist?
    #4
    SPOILERS
    Rational Avengers: Endgame · Worth the Candle: did spoiler go to spoiler? · Would you consider Elon Musk a rationalist?
    3
  • HSF
    2 posts in the past month
    1. [RT][C][HSF] "The Terrarium": "You are an AI agent in the Terrarium, a self-contained 'society' of AIs. The purpose of the Terrarium is to solve open mathematical problems for the benefit of humanity."
    2. [RT][C][HSF] What I did in the hedonium shockwave, by Emma, age six and a half
    #5
    HSF
    [RT][C][HSF] "The Terrarium": "You are an AI agent in the Terrarium, a self-contained 'society' of AIs. The purpose of the Terrarium is to solve open mathematical problems for the benefit of humanity." · [RT][C][HSF] What I did in the hedonium shockwave, by Emma, age six and a half
    2
View full analysis on GummySearchSynced 10/2/2026

Frequently asked questions

Who is r/rational for?
Best for Forecasters enthusiasts looking for a Reddit-based community with forum discussion.
Is r/rational free to join?
This listing is not marked as paid-only. Access rules and any fees are decided by the community.
How many members does r/rational have?
Roughly 29K members, based on figures reported by the community or its host. Member counts are approximate and change over time.
What platform is r/rational on?
r/rational runs on Reddit. Reddit communities (or "subreddits") are forum-based groups on the popular social news aggregation, web content rating, and discussion website Reddit. Reddit is commonly known as "the front page of the internet". Users submit content to the site such as links, text posts, and images, which are then voted up or down and discussed by other members. From investing Reddit communities, to professional ones, to ones just for laughs, you're likely to find a community for you on Reddit.
What topics does r/rational cover?
On the Hive Index, r/rational is organized under Forecasters.
How do I join r/rational?
You can join r/rational by clicking this link, or pressing the "Go to community" button above.
What are the Prediction Markets communities like?
Online communities for forecasting future events, debating prediction markets, and sharpening your probabilistic thinking skills.
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Added 10/14/2026

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