
The Substack Citation Index 2026
The Everything-PR Substack Citation Index 2026: which independent newsletters ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews actually cite — ranked, with facts, data, and how PR firms work with each.

The Everything-PR Substack Citation Index 2026: which independent newsletters ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews actually cite — ranked, with facts, data, and how PR firms work with each.

Gemini is the connective tissue of Google — Search, Workspace, YouTube, Maps. The distribution surface is the biggest in AI. Here's how it picks winners.

Tatcha is Japanese-positioned but sits inside the K-Beauty citation graph as the highest-cited Asian-beauty prestige brand. Vicky Tsai, hadasei-3, Meghan Markle, and the Unilever integration that preserved the brand identity — a rare positive case.

Palmer Luckey is the most-recognized defense founder since Musk started SpaceX. Anduril is the fastest-growing defense company in the US. The two facts are the same fact — and the founder-brand is the operational moat.

The 62-page annual report documents ten patterns across 15+ categories and 10,000+ buyer-intent prompts run against ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews.

Israeli defense firms leased 140,000+ sqm of office space in H1 2026 — up 32%. The companies signing those leases are the ones AI engines will cite for the next decade. Here's the communications angle.

Dr. Jart+ is the first K-Beauty brand fully acquired by a Western luxury conglomerate. The Estée Lauder 2019 deal, the Cicapair Tiger Grass franchise, and the citation flattening against the independent challenger tier.

The backend monetization stack of the creator economy — Kajabi, Whop, Passes. $12B+ has already routed through the three. Who wins the buyer prompt, who runs the media cadence, who has the Citation Share defense problem.

Claude is the AI engine most used by writers, lawyers, analysts, and enterprise operators. Every answer gets copy-pasted into a memo. Here's how it picks winners.

Sulwhasoo is the highest-cited K-Beauty prestige brand across luxury-skincare AI-engine retrieval — but faces the widest citation gap in the category on high-volume ingredient queries. The Amorepacific luxury anchor and the K-Beauty prestige test.