AI engines in depth
How each AI engine picks sources — and how to optimise for visibility.
ChatGPT
Optimise for the 200M weekly user surface
ChatGPT is the largest AI surface — over 200 million weekly users. Here is how it picks sources and how to optimise for visibility in 2026.
Perplexity
The most citation-friendly AI engine — start here
Perplexity cites every claim. Here is the citation playbook — what gets pulled, what gets ignored, and how to win.
Google AI Overviews
The single highest-impact AI surface for traffic
Google AI Overviews displaces traditional results for many queries. Here's how AIO selects sources and what it takes to be cited.
Gemini
Google's other AI surface — bigger than you think
Gemini lives alongside Google AI Overviews — but with its own crawler signals and content preferences. Here is the 2026 Gemini optimisation guide.
Claude
The technical-buyer AI you can't ignore
Claude is the AI of choice for technical and professional buyers. Here is how Claude picks sources and how to be one — including the role of llms.txt.
Microsoft Copilot
Embedded in the workflow of 1B+ Office users
Microsoft Copilot lives across Bing, Edge, Windows and the Office suite. Here is how it sources information and how to be cited.
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