AI Now Accounts for 56% of Global Search Volume, Study Finds
A new study by Graphite.io finds AI tools generate 45 billion monthly sessions worldwide, representing 56% of global search engine volume. Google's market share has dropped from 89% in 2023 to 71% in Q4 2025, while U.S. AI usage grew approximately 300% year-over-year.
Our Take
This is the data point that should end every "should we invest in AEO?" conversation. AI isn't a niche channel anymore. It's 56% of global search volume.
Let that sink in. More than half of all search-like activity globally is now happening through AI tools like ChatGPT, Gemini, Perplexity, and Claude. In the U.S., AI represents 34% of search activity, with 300% year-over-year growth.
What This Means for B2B
Google's market share dropped from 89% to 71% in two years. That's not a blip. That's a structural shift in how buyers find information. And for B2B companies, the implications are massive:
Your buyers are increasingly getting their first answers from AI, not Google. If your brand isn't being cited in those AI-generated answers, you're invisible for a growing share of the buyer journey.
The study also found that 83% of global AI usage happens inside mobile apps. This isn't people going to a website and typing a query. It's people asking their AI assistant a question and getting an answer. Your content either shows up in that answer or it doesn't.
The AEO Imperative
When we isolate search-like prompts specifically, AI equals 28% of search worldwide and 17% in the U.S. Those numbers are only going up. The companies building structured, cite-ready content today are the ones AI systems will reference tomorrow. The ones still focused exclusively on traditional SEO are optimizing for a channel that's losing share every quarter.
This isn't about abandoning SEO. It's about recognizing that search has split into two channels, and you need to show up in both. That's exactly what Answer Engine Optimization is built for.
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