Knowing where a rival ranks on Google tells you almost nothing about whether ChatGPT recommends them. When a shopper asks "what's the best cordless vacuum for pet hair," the AI names two or three brands and moves on. If your competitor is in that shortlist and you aren't, you lost the sale before the click existed. This guide shows you how to measure a competitor's AI visibility, find out why the model trusts them, and turn the gaps into a plan.
By the end you'll be able to build a question set, read Share of Model and citation data across ChatGPT, Gemini and Perplexity, and rank your real AI competitors — often not the brands you fight on the SERP.
Key takeaways
- AI competition is measured in citations and mentions, not blue-link rankings. Track how often each brand is named and cited as a source, not where it sits on a results page. - Your AI competitors are the brands the model actually names in answers — that shortlist rarely matches your SEO competitor set. - Share of Model (SoM) is the headline metric: the percentage of visibility a brand holds inside the "you + rivals" set for a given category. - Citation-source analysis reveals the "why" behind a rival's lead — which Reddit threads, review sites and media pieces the AI leans on. - GEOly's industry-intelligence layer lets you query any brand or entire category without configuring your own prompts, so you see the whole field, not just your own dashboard.
Step 1: Reframe competitor analysis for AI search
Traditional competitor analysis tracks keyword positions, backlinks and domain authority. Generative engines don't rank a list of ten links; they synthesize an answer and cite a handful of sources. Four shifts matter.
- From rankings to citations: instead of "position 1–10," you measure how often a competitor is named and cited inside the answer. - From keywords to entities: the model understands a brand as an entity. The question becomes how well the AI "knows" that brand versus yours. - From traffic to Share of Model: the KPI is the share of AI conversations where the competitor appears, not raw organic sessions. - From links to semantic authority: it's the context in which trusted sources discuss a brand, not just link volume.
If you're new to the discipline, the primer on [generative engine optimization](/blog/what-is-generative-engine-optimization-geo) sets up the vocabulary used below.
Step 2: Identify who your AI competitors actually are
Your SEO rival list is a poor proxy. The models name whoever they trust for a topic — sometimes a niche brand, a marketplace listing or a media property you never benchmarked against.
Find the real set by asking the engines directly. Open ChatGPT, Gemini and Perplexity and run open-ended category prompts:
- "What are the best [category] brands in 2026?" - "Which [product] should I buy for [use case]?" - "Compare the top [category] companies."
