Reddit stats
r/selfdrivingcars subreddit stats
Posts, comments, unique posters, link rates, and activity patterns from the last month, updated daily.
Updated . Reporting period: Sep 28, 2026–Oct 28, 2026 (UTC).
From September 28, 2026 to October 28, 2026, 1,838 users on r/selfdrivingcars made 200 posts and 8,794 comments, or about 7 posts/day and 288 comments/day. The subreddit averaged 44.0 comments per post; 72.5% of posts and 3.1% of comments contained links. Its Health Score was 20.4/100, meaning unique posters divided by total posts and comments. The top 1% of users produced 7.5% of posts and 26.1% of comments. Activity is measured in UTC: the most active hour was 20:00 (2.0x avg), the most active day was Thursday (1.6x avg), and normalized weekend volume was 0.77x weekday volume.
Daily activity in r/selfdrivingcars
Daily totals combine posts and comments, grouped by UTC date. The lighter final bar shows a partial day through Oct 28 at 12:32 UTC.
Activity by day and hour
Each square is one hour, shown in UTC.
The heatmap shows when people post and comment, not when a post is most likely to get clicks or upvotes. Our Reddit posting-time analysis explains how to use activity patterns when planning a post.
Subreddits similar to r/selfdrivingcars
Discover related Reddit communities by the people who comment in both. These recommendations compare seven days of public comment activity, using a random sample of up to 50,000 commenters for large communities.
| Subreddit | Audience similarity | Shared commenters (est.) |
|---|---|---|
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| r/a_premium_auto_parts | 2.1% | 45 |
| r/spcxinvestors | 2.0% | 34 |
Audience similarity is the estimated share of commenters active in both subreddits out of those active in either one. Higher scores mean more audience overlap; they don't measure community quality or subscriber counts.
Calculated . Based on comments from Oct 19 through Oct 25, 2026 (UTC). Results are refreshed after one month.
Last month on Syften
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