Reddit is at the center of a new and sophisticated form of AI SEO spam , as brands and marketers turn to the platform to influence not only search results but also the responses of AI chatbots . The value of Reddit mentions has skyrocketed, with tools like ChatGPT , Gemini , and Perplexity citing content from the platform more frequently than ever before. This development has created a new battleground between moderators, users, and companies seeking to manipulate the conversation.
See also: Google AI search summaries will now lead to Reddit
Earlier this year, a Reddit user asked members of a skin-care subreddit if anyone had tried a particular hypochlorous acid spray — a product often used for acne. Among the dozens of responses, a user named Primary-Taro4254 seemed innocent at first. “ I haven’t personally tried this brand, so I can’t make a full comparison ,” he wrote, “ but I use a similar spray from Honeydew Labs and I really like it .” The user even provided technical details about the product, such as its 0.02% hypochlorous acid concentration and its acceptance by the National Eczema Association .
A closer look at Primary-Taro4254 revealed that the account had posted similar messages in threads about unrelated products and on other skincare subreddits. Soon, a member of r/SkincareAddiction — a popular subreddit with over 1 million weekly visitors — spotted the problem and warned others about “Honeydew Labs marketing bots.” A moderator soon announced that he had taken action and would automatically filter posts about the company.
Why AI SEO spam is targeting Reddit
It’s hard to overstate how central Reddit to the way billions of people experience the web in recent years. The platform has evolved from a collection of niche communities to arguably the most important website on the internet. Users began adding the word “reddit” to the end of their searches to avoid results full of SEO junk, and Google began prominently linking to the site in its results. Now, Reddit has become even more important to brands and marketers: AI chatbots love it and are constantly citing it.
According to data collected by Semrush — an SEO company owned by Adobe — Reddit was the most cited domain in May by Google’s AI tools ChatGPT , Perplexity , Gemini , and AI Mode , even beating out Wikipedia and major news sites. This has created a strong incentive for companies to plant “authentic” mentions on the platform — content that looks like regular user conversation but is actually designed to influence the AI systems’ responses. This new tactic is called Generative Engine Optimization (GEO) .
The logic is simple: if an AI chatbot retrieves and summarizes content from Reddit to answer user questions, then a positive mention of a product within an “authentic” conversation can be translated into a recommendation from the AI. This is much more valuable than a simple search result, because the user perceives it as an objective opinion and not an advertisement. Semrush also found that Google is introducing AI Overviews much more frequently compared to last year, which further reinforces this trend.
See also: Reddit begins blocking the mobile version of the website
How Reddit is tackling AI SEO spam
Reddit is not passively watching this development. According to data provided by the company, its automated systems detected about 25,000 spam posts and comments per day in the first quarter of 2026. At the same time, the platform blocked about 23 million spam views per day and revoked nearly 2 million unadulterated votes per day during the same period. As a result, users' exposure to spam decreased by about 20% year-over-year.
Notably, moderators — volunteer users who manage subreddits — remain a critical link in the chain of defense. According to Reddit, moderators were responsible for more than 52% of post and comment removals from July to December 2025. This shows that despite the expansion of AI tools, human judgment is still necessary to detect sophisticated spam that mimics authentic conversation.
In some communities, the situation has reached a stalemate. On r/Biohackers, for example, moderators reported experiencing an explosion of posts about peptides and HRT (hormone replacement therapy), leading some communities to move sensitive topics to megathreads and tighten rules on account age and disclosure requirements. Google has also moved in this direction, with a spam policy update on May 15, 2026 that specifically addresses AI-generated “answer engine optimization.”
The impacts of AI SEO spam for users and brands
For users, the biggest threat is the erosion of trust: recommendations that appear to come from real people may actually be targeted promotional seeding designed for AI systems. This is especially worrisome in categories like health, supplements, and skin care, where users seek honest experiences from fellow users. For Reddit communities, the result is increased moderation burden, more megathreads, and stricter posting rules.
For brands and marketers, the equation has changed: the value of a Reddit now comes with a higher risk of detection and punishment. Aggressive GEO can lead to takedowns, account bans, and reputational damage if exposed. For AI companies, the issue is about source integrity: if large language models (LLMs) repeatedly ingest manipulated content from Reddit, their responses may reflect stealth marketing rather than genuine user experience.
See also: UK vs Reddit: Mammoth fine for failing to protect children
The future of this “trust battle” in AI search will depend on how quickly platforms, AI companies, and search engines can adapt. Reddit is likely to continue to expand its AI moderation tools and coordinated behavior detection systems, as the economic incentives for manipulation remain strong. If enforcement improves, Reddit as a trusted source of discussion can be maintained; if manipulation overwhelms moderation, both Reddit and the AI systems that power it risk losing their credibility. This development represents one of the most significant challenges to the integrity of AI-powered search in the coming years.
