Observed Signal · Sep 22, 2026 · Research Report · Source: Digiday · Impact: 4/5 · Sentiment: Neutral
AI Chatbot Shares Fragment Beyond ChatGPT, Comscore Data Shows
Comscore's Q2 2026 AI Intelligence Report reveals that AI chatbot usage is diversifying, with ChatGPT's share of prompts dropping from 70% to 50% between January and June 2026, while Gemini's share nearly doubled to 30% and Claude grew to 11%. Overall usage is expanding, with 35% of desktop and 29% of mobile users visiting an AI assistant in June 2026. Google AI Overviews are also more prevalent, appearing in 39.4% of desktop searches, up from 25.8% a year earlier. For publishers and marketers, this fragmentation necessitates multi-platform GEO strategies that track visibility and citations across various assistants. The report emphasizes that being sourced doesn't guarantee visibility, as Tripadvisor is sourced for 61% of travel queries but cited only 21%.
High importance for publishers and marketers as it signals a fundamental shift in AI-driven discovery, requiring multi-platform GEO strategies and new citation-based metrics, directly impacting ad tech and media monetization.
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Key Takeaways & Evidence Grounding
- ChatGPT's share of prompt volume fell from 70% to 50% between January and June 2026.
- Gemini's share nearly doubled from 17% to 30%, and Claude climbed from 2% to 11% in the same period.
- Google desktop searches with AI Overviews grew from 25.8% in July 2025 to 39.4% in June 2026.
- ChatGPT reached 168 million desktop conversations in June 2026, and multiplatform visitation grew to 99 million from 59 million a year earlier.
- Tripadvisor accounts for 61% of travel sourcing by AI platforms but only 21% of citations.
Connected Companies & Entities
6 Entities mapped“According to Comscore's Q2 2026 AI Intelligence Report, published today.”
“Tripadvisor, for example, accounts for 61% of travel sourcing by AI platforms.”
“Companies from Forbes to Time are using their prominence and citation rates across AI answer engines as a new metric.”
“Companies from Forbes to Time are using their prominence and citation rates across AI answer engines as a new metric.”
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
ChatGPT Market Share Falls Below 50%
Sensor Tower’s State of AI Report (2026) finds OpenAI’s ChatGPT remains the most-used AI assistant but its global market share dipped below 50% for the first time, falling to 46.4% by the end of May 2026 as users migrate to Google’s Gemini (27.7%), Anthropic’s Claude (10.3%) and other assistants. ChatGPT still records ~1.1 billion monthly users; Gemini has 662 million and Claude 245 million. The report notes rising monetization — nearly 2.3 billion AI app downloads and an estimated $4.2 billion spent in H1 2026 — slower growth rates indicating market maturation, and that OpenAI began testing ads in ChatGPT in February (about 17% of daily users saw ads by May). Sensor Tower also highlights increasing AI-driven retail referrals and higher conversion from AI-referred shoppers.
ChatGPT Falls Below 50% Market Share
Sensor Tower's "State of AI 2026" report shows ChatGPT's share of global chatbot usage declining: after peaking above 80% in early 2024 and holding 60.1% in January 2025, ChatGPT had 46.6% market share in May 2026. Google’s Gemini reached 27.7% in May 2026, while Anthropic’s Claude rose from under 3% in January 2025 to over 10% by May 2026. Sensor Tower attributes the shifts to users increasingly switching between AI chatbots, company decisions (including controversy around OpenAI’s government deal that coincided with a spike in ChatGPT uninstallations), and intensified marketing: global time spent with AI tools is projected to exceed 36 billion hours in H1 2026 versus 17.2 billion hours in H1 2025, and US advertising budgets for AI have roughly tripled.
Google and ChatGPT Traffic Gap: Search Still Dominates
A June 2026 analysis of 10,171 websites by OneLittleWeb reveals that search engines still dominate web traffic, with 162.19 billion visits, compared to 8.26 billion for AI chatbots. Google alone accounted for 98.19 billion visits, nearly 12 times the traffic of all chatbots combined. ChatGPT leads the chatbot category with 5.32 billion visits, followed by Gemini and Claude. However, the study only measures browser-based traffic, excluding app usage, where AI assistants are heavily used. Google's AI Overviews, which blend AI-generated answers into search results, complicate the distinction between search and chat. The data suggests search remains the primary starting point for information, but the gap may narrow as AI integration grows.
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