The Everything-PR cybersecurity reference. Citation Share Index 2026 — 25 vendors ranked across ChatGPT, Claude, Perplexity, Gemini, AI Overviews. Palo Alto Networks #1. CrowdStrike #2. Microsoft Security #3. Wiz #5 after the $32B Google exit.
The Real Estate AI Citation Share Study — 25 brands, 62 prompts, 5 engines. Zillow locks the data layer. Compass leads on tech positioning. Individual named agents consistently outperform brokerages. And the regional expert answer layer is wide open in virtually every market.
Citation Share is the metric that describes the new decision surface — the share of AI-engine answers that name a brand inside a defined query universe. Share of voice and branded search are now upstream of where the consideration set is composed. The full methodology.
Everything-PR's modeled franchise measuring which brands AI engines surface when buyers ask the question. Five indexes live: APAC, India, Water Infrastructure, Energy Transition, Indian Travel. 125 brands. Five engines.
Citation Share is a pipeline channel, not a measurement initiative. How to frame AI visibility in the financial terms a CFO uses — addressable market, revenue at risk, cost, and payback period.
The work of winning Citation Share inside AI engines is a stack. Five layers. Each layer compounds the next. Almost no law firm has built all five. The build order.
For four decades, a Chambers Band 1 ranking moved deals. In 2026, it is one signal among thirty the AI engines weight. The buyer reads the AI answer — not the directory. Citation Share is the new ranking.
The AmLaw 100 dominates the directories and runs nine-figure marketing departments. Inside ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews, the largest firms are losing the answer to specialists a tenth their size. The Citation Share gap.
PR didn't get smaller. It got a new layer above it. How earned media + AI citation now build brand authority — and the six levers brands gaining Citation Share are operating across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews in 2026.
The ten figures building the infrastructure layer where AI systems retrieve, cite, and surface information. From Cloudflare's crawler controls to Pinecone's vector databases to Profound's brand visibility platform — Lane 8 of the AI Communications 100.