Guides to AI visibility
These guides explain how AI assistants such as ChatGPT, Claude, Gemini and Perplexity decide what to say about a brand, which pages they rely on, and how to measure and correct what they say. They are written to be useful on their own, whether or not you use Tonecast, and each one starts with the short answer.
All guides
- What is Generative Engine Optimization (GEO)?What GEO is, how it differs from SEO, what AI engines draw on, and what a brand can do first.
- How to check what ChatGPT says about your brandA step-by-step method: real prompts, clean sessions, repeated runs, and results read as rates.
- Why do AI assistants cite some sources and not others?How retrieval works, which pages get cited, and why citations are not the whole story.
- How to fix wrong information about your brand in AI answersFrom the wrong claim to the pages that carry it, and how long corrections take.
- Measuring AI visibility: a methodology guideMetric definitions, prompt design, sample sizes, confidence intervals and pitfalls.
- How to choose an AI visibility tool in 2026Six questions that separate measuring from counting, and nine tools with prices verified on 10 November 2026.
- Free AI visibility checkThree questions on ChatGPT, Claude and Perplexity about your brand, product or topic, in about two minutes. No account.
- Research: what do AI assistants cite?1,730 answers, 19,713 citations, four engines compared. Open dataset, CC BY 4.0.
Where should I start?
If AI visibility is new to you, start with what GEO is. If you want to see where your brand stands today, run the free AI visibility check for a first look, then follow the step-by-step check. If you already found an error, go to fixing wrong information. If you need to report numbers others will scrutinise, read the methodology guide. If you are comparing tools, start from how to choose an AI visibility tool.