Source Gap is a measurable AI search signal that captures how your brand appears inside answers generated by large language models.

Why is Source Gap different from SEO?

Classic SEO ranks pages in a results list. Source Gap measures how an AI assistant talks about your brand inside a generated answer, including mentions, citations, and recommendations.

How is Source Gap measured?

Findable runs real buyer prompts across multiple AI models on a recurring schedule, then aggregates mentions, citations, recommendations, and sources into trackable scores.

How can a brand improve Source Gap?

Improving Source Gap requires three things: authoritative sources that AI models retrieve, content that answers the buyer's actual question, and an entity profile the model recognises consistently across prompts.

Glossary/AI Search Glossary

ai-search

Source Gap

Source Gap is an AI-search concept describing how brands, sources, and topics appear inside large language models such as ChatGPT, Perplexity, Gemini, and Claude.

What is Source Gap?

Source Gap refers to a measurable dimension of how a brand shows up in AI-generated answers. Unlike classic SEO rankings on a results page, Source Gap describes signals captured directly from large language model responses — including whether the brand is named, how it is described, which sources support the answer, and how it compares to competitors in the same buyer questions.

Why it matters for AI search

Buyers increasingly start their research inside AI assistants. Source Gap matters because it determines whether your brand is part of the recommended set when an AI assistant answers a buyer question. Brands that ignore Source Gap lose share of recommendation, citation, and trust in markets where the AI answer is now the first impression.

How Findable approaches this concept

Findable measures Source Gap by running real buyer prompts across multiple AI models on a recurring schedule. The platform captures every mention, citation, recommendation, and source, then aggregates them into the Visibility, Citation, and Recommendation scores so teams can see exactly where they appear, where competitors win, and which prompts are still open.

Example

If a buyer asks ChatGPT "best CRM for a small healthcare clinic", the answer typically names 3–5 brands, links 2–6 sources, and recommends a top pick. Source Gap captures the position of your brand inside that answer, how often it appears across thousands of similar prompts, and which competitors take the recommendation when you do not.