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 sci fi, scifi, books, book, and movies, and they frequently recommend/review sci-fi books, sci-fi literature, and space opera book.
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
: "Looking for book recommendations similar / along the same line as the movie Sunshine(2007)"
23 posts
#2
Self-Promotion
: "My new book's a commercial failure, as usual, but this review cheered me up."
5 posts
#3
Ideas
: "If you could decide the next major production sci-fi movie, what would it be?"
2 posts
#4
Solution Requests
: "Trying to find a sci-fi series about the first jump drive ship gets lost"
1 post
#5
News
: "An Inside Look at 'Star Trek IV: The Voyage Home' As It Celebrates 40 Years"
1 post
Popular Topics in r/scifi
#1
Sci Fi
: "Top 5-10 Most powerful Vessels/Vehicles in Sci Fi, Greenships from Xeelee Sequence"
144 posts
#2
Scifi
: "What are your favorite armor/suits in all of Scifi?"
98 posts
#3
Books
: "What are your Top 10 SciFi Books?"
45 posts
#4
Book
: "You’re in a Book club where no one has read sci-fi. What’s your Book selection?"
41 posts
#5
Movies
: "Looking for some lesser known sci-fi Movies outside of Netflix’s usual catalog hidden gems, cult favorites, or underrated films with unique concepts and a good atmosphere"
31 posts
#6
Space
: "Graviton Nomad (original Spaceship) & Artwork"
31 posts
#7
Movie
: "I decided to watch Evolution for the first in years because I needed a laugh and it's still funny. It is a great Movie if you want a lighthearted but funny scifi film to watch."
26 posts
#8
Hate
21 posts
#9
Worst
20 posts
#10
Series
: "Any Series Where Humans Move to Another Planet for Survival?"
15 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
Space Opera Book
88 reviews
#1
Peter F. Hamilton
4.9★ from 8 reviews
#2
Alastair Reynolds
4.7★ from 6 reviews
#3
Lois McMaster Bujold
5.0★ from 4 reviews
Flair Used in r/scifi
#1
Recommendations
: "No one told me about Farscape!"
57 posts
#2
Films
: "I decided to watch Evolution for the first in years because I needed a laugh and it's still funny. It is a great movie if you want a lighthearted but funny scifi film to watch."
29 posts
#3
General
: "Why isn’t Planetes discussed more in sci-fi circles?"
27 posts
#4
Original Content
: "The 'Big Bang' Goes Sci-Fi with 'Stuart Fails to Save the Universe' (Exclusive)"
26 posts
#5
TV
: "Amazon has canceled their planned Stargate rebot"
23 posts
#6
Print
: "Every book my friends and I read over a year of sci-fi book club"
20 posts
#7
ID This
: "Trying to find a sci-fi series about the first jump drive ship gets lost"
6 posts
#8
Games
: "Is War Hammer 40k the worst sci-fi universe to be a part of?"
5 posts
#9
Community
: "Most iconic sound in sci fi history?"
3 posts
#10
Art
: "Picked this up for $30, did i get lucky? Syd Mead's Kronoteko"
3 posts
Member Growth in r/scifi
Yearly
+53k members(1.2%)
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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: June 11, 2026