Dr Hesham Mashhour

(he/him)

Founder of HarperFlow | AI Search & GEO Researcher — original data on what ChatGPT, Perplexity & Gemini actually cite

About

I'm the founder of HarperFlow, a content engine that runs company blogs on autopilot — engineered to get businesses cited by AI assistants like ChatGPT and Perplexity, not just ranked on Google. I built its 100+ node research-and-verification pipeline myself, and I run it on my own business in public. I comment from data, not takes. I recently completed an original study of AI recommendations — 39 real buyer questions across ChatGPT, Perplexity, and Gemini, 117 answers analyzed. A few findings reporters have found useful: AI names specific companies in ~98% of commercial answers; the three engines agree on their picks only ~56% of the time; Perplexity's most-cited source is Reddit; and only ~31% of the pages AI cites contain any original data. I'm glad to comment on AI search and GEO,...

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Dr Hesham Mashhour

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Do Durable Market Power Characteristics Predict Future Fundamentals and Stock Returns? — Preregistered Working Paper

A series of head-to-head breakdowns of AI content platforms, judged on the only question that matters now.

HarperFlow GEO Research — six original reports on what AI actually cites, with the public dataset

Market Concentration (HHI) Calculator — Is This Market Dominated by a Few Companies?

The 2026 State of AI Citations — 39 buyer questions, 3 engines, 117 answers, every number measured

The Reddit Collapse — Reddit fell from 87% to 18% of Perplexity's citations in 15 days

Can Your Own Site Get Cited by AI? — 31%, and page structure (FAQ blocks + tables) is why

MPLY vs MOAT: Permanent Head-to-Head Comparison of Monopoly & Moat ETFs

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Featured

Do Durable Market Power Characteristics Predict Future Fundamentals and Stock Returns? — Preregistered Working Paper

A series of head-to-head breakdowns of AI content platforms, judged on the only question that matters now.

HarperFlow GEO Research — six original reports on what AI actually cites, with the public dataset

Market Concentration (HHI) Calculator — Is This Market Dominated by a Few Companies?

The 2026 State of AI Citations — 39 buyer questions, 3 engines, 117 answers, every number measured

The Reddit Collapse — Reddit fell from 87% to 18% of Perplexity's citations in 15 days

Can Your Own Site Get Cited by AI? — 31%, and page structure (FAQ blocks + tables) is why

MPLY vs MOAT: Permanent Head-to-Head Comparison of Monopoly & Moat ETFs

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Education

Location

Expertise

Contact Information

Websites

Verification Signals