Total Search Dominance Index
Google maintains above 90% market share for 16 consecutive months while AI engines account for roughly 0.3% of total referrals. In traditional search, dominance is structural. In AI search, the market is still sorting.
AI-Specific Search Index
ChatGPT remains 6X the size of Gemini and continues to dominate AI referrals. However, April showed ChatGPT gaining back 5.2% after Q1 declines, mostly at the expense of Perplexity (down 4.3%), Gemini (down 0.2%), and Claude (down 2.6%). This volatility would never happen in traditional search.
Monthly Market Trends By AI Engine
ChatGPT contracted through Q1 as Gemini and Claude surged, then reversed in April as users responded to model improvements. Perplexity continues its decline. The pattern is clear: AI search users have no loyalty and switch immediately based on perceived model quality.
E-Commerce Category Presence in Google AI Overviews
Shows year-over-year growth in Google AI Overview presence across e-commerce categories from Nov 2024 to Nov 2025.
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