Reddit has become the most-cited domain by leading AI chatbots, according to new data from Semrush, and that status is attracting a wave of brand manipulation that subreddit moderators are scrambling to contain.
Semrush, the SEO analytics firm now owned by Adobe, compiled data for The Verge showing that Reddit was the most-cited domain in May 2026 by ChatGPT, Perplexity, Google Gemini, and Google AI Mode combined. It outranked every news publisher, every scholarly article repository, and Wikipedia.
The numbers explain why. When users ask chatbots for product recommendations, technical advice, or subjective assessments, models draw heavily from Reddit threads, which offer the kind of conversational, opinion-rich text that LLMs are trained to reproduce. Semrush also found that Google is inserting AI Overviews into commercial-intent searches significantly more often than a year ago, meaning AI-generated answers are increasingly mediating what was once a straightforward search-and-click shopping journey.
That shift has not gone unnoticed by the marketing industry. A growing ecosystem of agencies and tools now promises to get brands cited by AI models, and Reddit is their primary battlefield. The platform's reputation for authentic, unfiltered user opinions makes it attractive both to models seeking credible-sounding sources and to marketers seeking to launder promotional content through that credibility.
One brand, many accounts
The Verge documented one case involving a skincare brand called Honeydew Labs. A Reddit account named Primary-Taro4254 posted near-identical praise for the company's hypochlorous acid spray across multiple unrelated threads and subreddits, each time citing the product's 0.02 percent concentration and its acceptance by the National Eczema Association. Users in the r/SkincareAddiction community, which draws more than a million weekly visitors, flagged the pattern within days. Moderators removed the posts and added Honeydew Labs to an automatic filter for manual review. The company did not respond to a request for comment.
The feedback loop
Reddit's centrality to AI search is not accidental. The company struck content licensing deals with Google and other AI firms, granting access to its data for model training and retrieval. Those deals have been financially significant for Reddit, but they have also made its content a primary source for AI-generated answers. That creates a feedback loop: the more valuable Reddit becomes to AI, the more incentive there is to manipulate it.
Subreddit moderators interviewed by The Verge described a growing volume of AI-generated or AI-assisted promotional posts, many designed to surface in response to specific product queries that chatbots are likely to pick up. Some moderators said they now review new accounts and posts with elevated scrutiny, looking for the generic, keyword-stuffed cadence that LLM-generated text often exhibits.
The problem echoes the SEO spam cycle that degraded traditional web search results a decade ago, a cycle that initially drove users to append "reddit" to their queries for cleaner answers. Whether moderators can prevent the same cycle from degrading Reddit's value to AI models remains an open question.
Sources
Can Reddit fend off a new wave of AI SEO spam? - The Verge, August 4, 2026: https://www.theverge.com/ai-artificial-intelligence/973098/reddit-ai-search-seo-marketing-brands-spam
