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, book, books, and series, 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
: "Posting again since my last post was deleted. I’m almost done with Devs, any recommendations on what to watch next?"
9 posts
#2
Self-Promotion
: "We Interrupt This Subreddit... to promote this Space Opera Adventure! (Lost Souls)"
5 posts
#3
Solution Requests
: "Sci-fi writer H P Lovecraft signed book need help on rarity or historical value , tell me I’m not crazy that this is as low valued as people say. Any insight would be helpful"
1 post
#4
Pain & Anger
: "Comet is the absolute BEST channel"
1 post
#5
Ideas
: "What if consciousness is not a gift, but a burden? We’re exploring that idea in our sci-fi game"
1 post
Popular Topics in r/scifi
#1
Scifi
: "What Scifi books are you baffled haven't been made into TV shows?"
46 posts
#2
Sci Fi
25 posts
#3
Book
: "My Review about Death's end Book"
24 posts
#4
Books
: "Need 6 scifi book on audible by end of month, please."
22 posts
#5
Series
: "What Scifi books are you baffled haven't been made into TV shows?"
17 posts
#6
Worst
14 posts
#7
Movies
: "Upstream Color (2013) - A look back"
14 posts
#8
Struggling
13 posts
#9
Hate
13 posts
#10
Looking For A Book
11 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
: "Just finished Project Hail Mary and I am completely blown away."
47 posts
#2
Films
: "Contact Turns 29 Today: Does it still hold up?"
31 posts
#3
Original Content
: "Just sharing some of my scifi inspired artwork"
30 posts
#4
General
: "Is there a pattern that determines military spaceship doctrine in real life and sci-fi?"
29 posts
#5
TV
: "The Buzz Lightyear cartoon Disney wants you to forget."
28 posts
#6
Print
: "I just finished All Tomorrows a few days ago and boy is it grim."
21 posts
#7
Community
: "In his book "Asimov's Guide to Shakespeare" (1970), he wrote "When stupidity is considered patriotism, it is unsafe to be intelligent.""
5 posts
#8
Art
: "For All Mankind in LEGO: Moon, Mars & Titan"
5 posts
#9
ID This
: "Question about This Sci Fi Mount Rushmore"
3 posts
Member Growth in r/scifi
Yearly
+60k members(1.4%)
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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: July 13, 2026