r/scifi is a subreddit with 4.5M members. The most common kinds of discussions are self-promotion, and the community frequently discusses scifi, sci fi, books, book, and worst, 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
Self-Promotion
: "My novel is on sale on Kindle for 0.99"
3 posts
Popular Topics in r/scifi
#1
Scifi
31 posts
#2
Sci Fi
24 posts
#3
Books
20 posts
#4
Book
15 posts
#5
Worst
14 posts
#6
Struggling
13 posts
#7
Hate
13 posts
#8
Movies
12 posts
#9
Annoying
10 posts
#10
Space
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
Original Content
: "My sci-fi novel flew off the shelves of my local bookstore!"
58 posts
#2
Recommendations
: "One of the best sci-fi books I’ve ever read"
41 posts
#3
General
: "I wish we had a space opera on TV that was of HBO level quality and was just a big pop cultural phenomenon as GOT"
22 posts
#4
Print
: "Just finished reading Artemis by Andy Weir and ooof. It was rough."
14 posts
#5
TV
: "Happy 60th birthday to Star Trek, George! We love you."
9 posts
#6
Films
: "Quentin Tarantino wanted to remake Invasion of the Body Snatchers from the perspective of the aliens"
8 posts
#7
ID This
: "Short Story About the Last Homo Sapiens in a World of Homo Superior (Kindness)"
5 posts
#8
Games
: "StarCraft II: Heart of the Swarm Opening Cinematic"
3 posts
#9
Community
: "Some fun things from MoPop today"
2 posts
#10
Art
: "Hello fellow Sci-fi fanatics, I upcycled this today, what do you think?"
2 posts
Member Growth in r/scifi
Yearly
+74k members(1.7%)
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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: September 13, 2026