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r/ProjectHailMary

Andy Weir. Founded 2020 · 124K members

126.4K members. The best post we have captured here reached 22.8K upvotes, which works out to 180 per 1,000 members.

180peak upvotes per 1,000 members
126.4Kmembers
22.8Kbest post
1Kmost comments
870posts we track

Open r/ProjectHailMary on Reddit ↗

What actually lands here

The mix of post types among everything we have captured. Posting a link where almost nothing but images lands is wasted effort, and this is the fastest way to see it.

41% 19% 17% 13%
Image 41% Text 19% Gallery 17% Question 13% Video 7% Link 3%

The topics it labels

Flairs are the community's own categories, and the closest thing a subreddit has to telling you what it wants.

Fist My Bump 176 Fan Art - No selling 114 Question? 79 Book Discussion 28 Movie Discussion - Movie Spoilers Inside! 26 Movie Discussion - Theory 11 You Are Here, Question? 6 Audiobook Discussion 3

What the ceiling looks like

The biggest posts we have captured here. Links go to the original on Reddit.

Just finished my Project Hail Mary cosplay for SDCC! Not half bad?

↑ 22.8K 💬 1K video 2026

I made Rocky in Stained Glass!

↑ 13.6K 💬 364 gallery 2026

BookCon Grace and Rocky!

↑ 12.9K 💬 120 image 2026

A Box Office Smash! Project Hail Mary is on pace to be one of the most successful hard sci-films ever.

↑ 12.1K 💬 626 image 2026

My PHM booknook. I spent waaaay too much time on this.

↑ 11.4K 💬 289 gallery 2026

Rocky in the wild!

↑ 10.6K 💬 84 image 2026

LETS GOOOO

↑ 9.6K 💬 142 image 2026

Carl appreciation post

↑ 9.4K 💬 263 gallery 2026

Ryan Gosling the Superstar

↑ 9.3K 💬 76 image 2026

“Uhh, mission control, we’re just gonna take another lap before re-entry… I’m on the last chapter of PHM.” </3

↑ 8.7K 💬 116 image 2026

Communities its size

Within four times the member count either way, so the comparison is fair. Sorted by upside.

r/ProjectHailMary, in numbers

Answered from the posts ViralHunt holds from this community, not from Reddit's own about page.

What is r/ProjectHailMary?
r/ProjectHailMary ("Andy Weir") is a Reddit community. It was founded in 2020 and has 124K members.
How many members does r/ProjectHailMary have?
r/ProjectHailMary has about 126.4K members. ViralHunt has tracked 870 of its posts; the biggest reached 22.8K upvotes, which is 180 per 1,000 members.
What is the most viral post on r/ProjectHailMary?
"Just finished my Project Hail Mary cosplay for SDCC! Not half bad?" reached 22.8K upvotes and 1K comments in 2026, the highest score among the posts we hold from r/ProjectHailMary.
What subreddits are similar to r/ProjectHailMary?
Communities of a comparable size we track: r/Trumpvirus, r/alaska, r/Louisiana, r/popculture, r/Antimoneymemes, r/BlueskySkeets.
What kind of posts do best on r/ProjectHailMary?
Of the posts we hold, 41% are image posts and 19% are text posts.
When is the best time to post on r/ProjectHailMary?
Across 870 timestamped posts we hold, the slots whose posts averaged the highest score are Friday at 22:00 UTC (4.9K avg upvotes), Monday at 18:00 UTC (3.3K avg upvotes), Friday at 17:00 UTC (3K avg upvotes). The busiest day is Monday. For Reddit as a whole, see the best time to post on Reddit page.
How many upvotes does a post need to reach the top of r/ProjectHailMary?
The 20th-best post we hold from r/ProjectHailMary has 7K upvotes, so that is roughly the bar for the top twenty. We captured 310 posts from it in the last 30 days.

See what is climbing here before you write

ViralHunt tracks Reddit and eight other networks, records how every post grows, and puts what is taking off in front of your team in one list.

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Every figure here is what ViralHunt has captured from r/ProjectHailMary, not everything the community has ever posted. We deliberately do not publish an average score: our sample is weighted toward a community's best posts, so an average would be flattering and wrong. Peak per 1,000 members is computed the same way for every community listed. See how we measure.