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Pangram Study Finds Reddit Has Lowest Share of AI-Generated Content at 4.4%, While LinkedIn Leads

July 16, 2026 at 09:13 EDT

Research & Papers
Security

A new analysis from AI-detection firm Pangram Labs found that just 4.4% of content on Reddit is fully AI-generated—one of the lowest rates among major social platforms—while LinkedIn stood out as by far the heaviest source of machine-written posts. The findings, published July 9, 2026, are based on more than one million real feed posts scanned through the company's Chrome extension.

July 9, 2026 · AI Content Study

LinkedIn Floods Feeds With AI — Reddit Stays Human

An analysis of 1,002,627 real feed posts across five platforms found LinkedIn to be by far the heaviest source of machine-written content, while just 4.4% of Reddit content was fully AI-generated.

13.8%

of all posts flagged as fully AI-generated

25.72%

of longer posts (250+ words) flagged as AI

1M+

feed posts (50+ words) scanned across 5 platforms

AI-flagged rate on longer posts

Share of posts over 250 words judged fully machine-written

40%+

25.7%

All platforms
(avg)

11.6%

Reddit
(top posts)

Why Reddit reads so human

Reddit was the largest slice of scanned volume (36.7%), yet the lowest AI rate — because reply-heavy, human-written comments dominate its mix.

72%

of Reddit's scanned items were comments

98.1%

of those replies judged human-written

4.4%

overall Reddit AI rate — among the lowest

LinkedIn dominates the AI flags

62%

of all AI flags in the dataset came from LinkedIn alone…

~33%

…despite being only about a third of scanned volume

Read with caution

Data is volunteered by the firm's own extension users — not a representative platform sample.
A separate 2025 study estimated ~15% of Reddit posts as AI — far above the 4.4% here.
Detection accuracy is contested, with false-positive risk and possible bias against non-native English writers.

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