Observed Signal · Jul 9, 2026 · Research Report · Source: https://marketingtechnews.net/feed/ · Impact: 3/5 · Sentiment: Positive
Google Leads AI Discovery; ChatGPT Dominates Referrals
Previsible released the third edition of its AI Traffic Study, analysing 6.77 million LLM-driven sessions across 166 websites from November 2024 to May 2026. The study finds Google’s AI surfaces (AI Overviews and AI Mode) generate a larger volume of AI-influenced discovery than standalone LLM assistants. Among standalone assistants, ChatGPT accounted for the vast majority (92.4%) of measurable referral traffic and saw sessions grow from 47,606 in November 2024 to 610,910 in May 2026. Total monthly standalone LLM-referred sessions grew 9.9x over the study period to 644,478 in May 2026. The report highlights industry and page-type differences in LLM referral behaviour, significant growth in e-commerce LLM traffic, and recommends that marketers prioritise Google AI surfaces and measure AI traffic by page type.
Study quantifies rapid growth and platform distribution of AI-driven referral traffic (Google AI surfaces vs standalone LLMs), providing actionable visibility for marketers and publishers but is not a direct platform policy or major platform product change.
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Key Takeaways & Evidence Grounding
- Previsible published the third edition of its AI Traffic Study covering November 2024–May 2026 and analysing 6.77 million LLM-driven sessions across 166 websites.
- The study found Google AI surfaces (AI Overviews and AI Mode) represent a larger volume of AI-influenced traffic than standalone LLM platforms combined.
- Monthly LLM-driven sessions grew 9.9 times between November 2024 and May 2026, reaching 644,478 sessions in May 2026.
- ChatGPT accounted for 92.4% of standalone AI referral traffic across the analysed sites and grew from 47,606 sessions (Nov 2024) to 610,910 (May 2026).
- Other assistants: Gemini grew ~3.2x (5,598 → 18,119), Claude grew ~64x (133 → 8,528) and Perplexity and Copilot recorded declines over parts of the period.
Connected Companies & Entities
5 Entities mapped“Previsible said Google remains the main surface for AI-influenced brand discovery, even as ChatGPT dominates measurable referrals from stand...”
“The study separately measured referral traffic from standalone AI assistants. ChatGPT accounted for most measurable LLM referral traffic in ...”
“At the time, Perplexity held 8.9%, Gemini 4.5%, Copilot 2.1%, and Claude 0.6%....”
“At the time, Perplexity held 8.9%, Gemini 4.5%, Copilot 2.1%, and Claude 0.6%....”
“At the time, Perplexity held 8.9%, Gemini 4.5%, Copilot 2.1%, and Claude 0.6%....”
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Related Market Signals & Shifts
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Previsible Report: Google Central; ChatGPT Leads LLM Referrals
Previsible released the third edition of its AI Traffic Study (Nov 2024–May 2026), analyzing 6.77 million AI-driven search sessions across 166 websites. The report finds AI discovery inside Google (via AI Overviews and AI Mode) drives more AI-influenced traffic than all standalone LLM assistants combined. Among standalone LLMs, ChatGPT accounted for 92.4% of trackable referral traffic. Gemini grew 3.2x to become the second-most visible model, while Claude grew 64x and overtook Perplexity in March 2026. The study also found e-commerce content saw AI referral traffic increase 37x. Previsible’s authors recommend citation-worthy content, authority-building, AI accessibility, answer-journey optimization, and measuring business impact to win AI-driven discovery.
AI Chatbots Beat Google in Referrals
A developer tracked referral sources to a new web tool for 30 days and found AI chatbots — led by ChatGPT — became the largest single referrer. Using a 30-day snapshot dated 2026-04-25, chatgpt.com accounted for 32% of referrals versus google.com at 21% and bing.com at 18%. The author built markdown.free (a privacy-focused Markdown → PDF/DOCX/EPUB converter) and performed standard SEO, but did not optimise for chatbots; yet ChatGPT began recommending the tool organically. Aggregate metrics reported: AI referrals (ChatGPT + Perplexity + others) = 35%, search engines = 58%, upload-start rate = 87%, and conversion (uploads → success) = 86%. The post raises questions about whether AI chatbots represent a durable new discovery channel distinct from traditional search.
ChatGPT Referrals to B2B Sites Quadrupled
Demandbase’s Labs data shows ChatGPT-driven referrals to tracked B2B websites rose from about 645,000 in June 2025 to 2.6 million in June 2026 (a 303% increase), with a sharp inflection in May 2026 when volume more than doubled. The Labs dataset covers more than 11 billion visits across 1,584 platform instances, but Demandbase warns the data is proprietary and not independently verified; attribution is further complicated because many AI-influenced sessions appear later via brand searches. Growth was concentrated in OpenAI’s ChatGPT while Perplexity referrals declined and Gemini and Claude remained largely flat. Demandbase also reports rising ad spend on its platform—CTV up 112% and display up 55% year over year, with CTV’s share rising modestly—and says AI-generated referrals may become an increasingly important buyer-intent signal. Independent evidence on conversion value is mixed.
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