Observed Signal · Jul 7, 2026 · Report Release · Source: https://martechseries.com/feed/ · Impact: 3/5 · Sentiment: Positive
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.
The study quantifies where AI-driven discovery traffic originates (Google vs standalone LLMs) and provides measurable model-level referral shares (e.g., ChatGPT 92.4%), which informs SEO/GEO and content strategies for marketers and publishers.
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Key Takeaways & Evidence Grounding
- Previsible released the third edition of its AI Traffic Study covering November 2024 to May 2026.
- The report analyzed 6.77 million AI-driven sessions across 166 websites spanning SaaS, e-commerce, finance, legal, health, insurance, education, and publishing.
- Previsible found AI discovery inside Google (AI Overviews and AI Mode) represents more AI-influenced traffic than all standalone LLM assistants combined.
- ChatGPT carried 92.4% of trackable standalone LLM referral traffic during the tracked period.
- Gemini grew 3.2x and is now the second-most visible model; Claude grew 64x and moved past Perplexity in March 2026; e-commerce content saw AI referral traffic rise 37x.
Connected Companies & Entities
6 Entities mapped“The study highlights where brands should focus for the second half of 2026 and found that AI discovery happening inside Google, through its ...”
“Among the destinations where people query AI LLMs directly, Previsible’s study found ChatGPT leads by a wide margin, carrying 92.4% of track...”
“Claude grew 64x over the tracked period and moved past Perplexity in March 2026, with particular strength among developers, technical buyers...”
“Claude grew 64x over the tracked period and moved past Perplexity in March 2026, with particular strength among developers, technical buyers...”
“MarTech Series is a leading publishing platform that provides daily updates on marketing technology news, in-depth interviews with industry ...”
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
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.
Gen AI Tools Traffic Share: Who Trails ChatGPT?
Similarweb’s AI Global Report shows a shifting landscape for Gen AI tool traffic. Gemini by Google has risen to 13.7% of traffic, up from 5.6% a year earlier, while ChatGPT’s share declined from 86.6% to 72.3%. Claude has surpassed Perplexity, with Grok and DeepSeek recovering ground. Elon Musk publicly questioned Grok’s data reporting. The analysis also notes Google’s broader AI strategy, including Gemini’s integration into Drive and Maps and adoption by Apple’s Siri. Separately, Google launched an affordable AI Plus subscription in Germany, offering higher usage limits for Nano Banana and expanded access to Veo 3 Fast, Flow by Google, and Whisk. The article highlights ongoing intensity among leading Gen AI players and potential implications for search, design tools, and other AI-enabled services, while acknowledging data-reporting scrutiny and governance concerns around new tools.
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.
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