Mack Grenfell
Lead Researcher

Mack Grenfell

Founder & CEO, Trakkr

Researching how AI systems discover, evaluate, and cite web content. Published original studies analyzing millions of AI-generated responses across ChatGPT, Claude, Gemini, Perplexity, and other models.

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Research Publications

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Research Focus

AI Citation Analysis

How AI models select, rank, and present source material in generated answers

Crawler Behavior

How AI training and search crawlers discover and process web content

Cross-Model Divergence

Where and why different AI models disagree on citations and recommendations

Brand Visibility

How brand presence manifests across AI-generated search results

Content Optimization

Which content structures and page types perform best in AI answers

Citation Lifecycle

How AI citations decay, refresh, and evolve over time