r/scifi is a subreddit with 4.5M members. The most common kinds of discussions are advice requests and self-promotion, and the community frequently discusses scifi, sci fi, books, worst, and book, and they frequently recommend/review sci-fi books, sci-fi literature, and sci-fi novels.
Welcome to r/scifi, a home for all things science fiction, the heart of speculative fiction.
Join the discussion about your favorite books, authors, movies, shows, comics, and games — anything with a touch of science and imagination.
Popular Themes in r/scifi
#1
Advice Requests
: "Best Sci Fi Novel in the last 20 years."
16 posts
#2
Self-Promotion
: "Since the “Occupy Earth Trilogy” begins on July 4-5, it seems only fitting to put the entire trilogy out there for FREE on Amazon for the next four days (July 4-7). Enjoy!"
4 posts
#3
Ideas
: "I've always loved the idea that somewhere out there in the galaxy, there's someone whose job is checking aliens' passports before they travel. So a small team and I are making a game about exactly that."
2 posts
#4
Solution Requests
: "Help me find a time travel story I once read"
1 post
Popular Topics in r/scifi
#1
Scifi
32 posts
#2
Sci Fi
28 posts
#3
Books
20 posts
#4
Worst
15 posts
#5
Book
14 posts
#6
Struggling
13 posts
#7
Hate
13 posts
#8
Movies
12 posts
#9
Series
10 posts
#10
Annoying
10 posts
Products Discussed in r/scifi
Sci-fi Books
588 reviews
#1
Adrian Tchaikovsky
4.7★ from 14 reviews
#2
Iain M. Banks
4.9★ from 11 reviews
#3
Andy Weir
4.8★ from 11 reviews
Sci-fi Literature
142 reviews
#1
Isaac Asimov
4.8★ from 5 reviews
#2
Orson Scott Card
4.8★ from 4 reviews
#3
Frank Herbert
4.5★ from 4 reviews
Sci-fi Novels
96 reviews
#1
Alastair Reynolds
4.7★ from 7 reviews
#2
Jack McDevitt
4.7★ from 3 reviews
#3
Stephen Baxter
4.7★ from 3 reviews
Flair Used in r/scifi
#1
Recommendations
: "Pacific Rim, worth a revisit?"
43 posts
#2
General
: "Rest in peace Sam Neill"
41 posts
#3
Films
: "Contact Turns 29 Today: Does it still hold up?"
31 posts
#4
Original Content
: "Just sharing some of my scifi inspired artwork"
27 posts
#5
Print
: "“There Will Come Soft Rains” by Ray Bradbury"
25 posts
#6
TV
: "The Buzz Lightyear cartoon Disney wants you to forget."
19 posts
#7
Art
: "[SPS] I made LEGO Interstellar Bookends for LEGO Ideas!"
6 posts
#8
ID This
: "I need help identifying a SciFi book that I read over 40 years ago"
6 posts
#9
Community
: "In his book "Asimov's Guide to Shakespeare" (1970), he wrote "When stupidity is considered patriotism, it is unsafe to be intelligent.""
2 posts
Member Growth in r/scifi
Yearly
+66k members(1.5%)
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About
GummySearch helps people research Reddit communities by organizing activity, growth, themes, and post-level signals into one place.
This page gives a focused view of r/scifi, including current member size, discussion patterns, product reviews, and related communities to explore.
This data is synced periodically so insights stay current and useful for ongoing research.
Last updated: August 7, 2026