Google AI Mode Citation Share - May 2026
Klaas FoppenThe Most Cited Domains on
AI Mode in May 2026
Based on Promptwatch data from May 1 - May 31, 2026. Citations tracked from real prompt responses using Google AI Mode.
What this means for you
May is a regime change: google.com itself becomes the most-cited domain at 4.24%, overtaking YouTube (3.42%) for the first time in this series. Add YouTube, and Google-owned properties account for roughly 7.7% of all citations we tracked. AI Mode increasingly answers with Google's own surfaces, from Maps and Business Profiles to support pages.
Reddit also had a strong month at 2.36%, which keeps community content firmly in the top three, while no other domain in the list clears 1%. Compared with ChatGPT's citation mix (where Reddit leads and google.com barely appears), AI Mode's self-referential tilt is its most distinctive trait.
How to act on it
- Treat your Google surfaces as citation assets: complete and actively maintained Business Profiles, Maps listings, and Merchant Center data are exactly the kind of google.com content AI Mode now cites at 4.24%.
- Reddit's 2.36%, the largest non-Google share after YouTube, makes genuine participation in your niche's subreddits one of the highest-leverage GEO moves this month.
- Everything below the top three sits under 1%, so pick the handful of high-intent questions in your category and build the single best crawlable answer for each. That is how long-tail domains get pulled into AI Mode's fan-out.
AI Mode Citation Share
April vs May 2026
Side-by-side comparison of citation share for the top domains on Google AI Mode between April and May 2026.
What this means for you
The April-to-May comparison shows the sharpest single move in this dataset: google.com exploded from 0.71% to 4.24%, a roughly sixfold increase that took it straight to #1. Reddit jumped 44% as well, from 1.64% to 2.36%, while YouTube held essentially flat (3.34% to 3.42%). The gains came at the expense of professional and editorial platforms: LinkedIn fell from 0.84% to 0.63% and Medium from 0.39% to 0.28%. In one month, AI Mode's citation mix pivoted toward Google's own properties and community content.
How to act on it
- Build monthly citation tracking into your reporting: a 6x move like google.com's means the channel mix you optimized for in April was already outdated by May.
- Respond to the Reddit surge (+44%): audit which threads AI Mode-style questions about your category appear in, and make sure your brand has a credible, helpful presence there before competitors do.
- If Medium or LinkedIn posts were part of your distribution strategy, note both lost a quarter of their share this month. Republishing that content on your own domain keeps the citation if the platform keeps fading.
How we collect this data
We collect millions of prompt responses, citations, and click data from the actual user interfaces of major AI platforms: over 26 billion data points and growing. This gives us one of the largest datasets on how AI search engines cite sources and recommend brands.
Real UI monitoring
Data straight from the interfaces of ChatGPT, Gemini, Perplexity, Claude, AI Overviews, and more.
26B+ data points
Over 26 billion analyzed citations, prompts, and responses, one of the largest AI search datasets available.
Continuously updated
Refreshed constantly so the trends you see reflect the latest behavior of AI search engines.
Aggregated & public
Published freely for the GEO community, based on aggregated, non-identifiable trends.
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