What a GEO audit really measures
A GEO audit measures your presence in answers generated by artificial intelligence. Not your Google rankings. Your citations in ChatGPT, Perplexity, Gemini and AI Overviews.
The distinction is fundamental. In SEO, you track a ranking: position 3 on a query is better than position 8. In GEO, you track an enriched binary presence: are you cited in the answer, how, and with what wording. A brand can rank first on Google and be completely absent from AI answers on the same query. The reverse also happens.
This divergence is not marginal. Only 11% of cited domains are cited by both ChatGPT and AI Overviews. In other words, dominating one channel guarantees nothing on the other. A GEO audit maps this reality platform by platform.
The signals the audit examines
Three families of signals fall outside the classic SEO framework and determine your AI citations.
First, technical accessibility. LLMs do not execute JavaScript. If your content loads client-side, it is invisible to AI crawlers. Server-side rendering or static HTML is not an optimization, it is a prerequisite.
Next, content citability. Models extract self-contained passages. An optimal citable passage runs between 134 and 167 words, answers a question directly and stands on its own, without depending on the preceding paragraph.
Finally, off-site authority. This is the most counterintuitive factor. The Ahrefs analysis of 200,000 domains (December 2025) shows that off-site brand mentions correlate more strongly with AI citations than Domain Rating does. YouTube presence shows a correlation of 0.737, Wikipedia accounts for 47.9% of ChatGPT citations, while Domain Rating tops out at 0.266.
The six deliverables of a serious audit
A credible GEO audit produces six concrete deliverables. If the quote does not mention most of them, it is not an audit, it is a superficial diagnostic.
The percentage of strategic queries where your brand is cited, platform by platform. This is the audit's reference metric. Without a starting figure, no progress can be measured.
The share of voice of your three to five direct competitors on the same queries. You will know who dominates, on which questions, and with which sources cited by the AI.
The analysis of rendering (SSR or client-side), passage structure, schema markup, accessibility to AI crawlers and the presence of an llms.txt file.
The list of pages and domains the AI actually cites in your market. It reveals the third-party content to target and the off-site platforms to invest in.
Page by page, which content is citable as is, which must be restructured, which is missing from the catalog.
An action plan ranked by impact and effort. Not a list of 80 recommendations, but the ten to fifteen workstreams that will move the needle.
AI share of voice is the heart of the system. If you want a first estimate before any commitment, our AI Visibility Score gives you a free starting point. To understand how this metric works, we detail the method in our article dedicated to AI share of voice.
The method, step by step
A GEO audit follows a reproducible protocol. The rigor of this protocol separates a real audit from a mere expert impression.
Step 1: define the query corpus
Everything starts with the list of queries to test. Not your SEO keywords, but the real questions a prospect asks an AI: comparative questions, recommendation questions, definition questions about your market. A serious audit tests between 30 and 150 queries depending on scope.
Step 2: query the platforms
Each query is submitted to ChatGPT, Perplexity, Gemini and triggered in Google's AI Overviews. You record the brand's presence, the wording, the cited sources and the mention rank. ChatGPT alone concentrates more than 900 million weekly users: ignoring it skews the audit.
Step 3: analyze the competitive gap
You repeat the operation for competitors. The goal is not to note that you are behind, but to understand why: which sources the AI favors, which formats it cites, which off-site authority feeds those citations. This is the whole point of a well-run LLM competitive benchmark.
Step 4: audit the technical layer
You verify that content is served as static HTML or via SSR, that key passages are structured and self-contained, and that FAQPage schema is present. FAQPage markup is a strong signal for AI Overviews and deserves particular attention.
Step 5: prioritize
You weigh potential impact against implementation effort. The final deliverable is not an observation, it is a sequence of actions executable as early as the following week.
Off-site authority weighs more heavily than your own site. An audit that ignores external brand mentions misses the main lever of AI citations.
Market pricing in France
Expect between 1,500 and 8,000 euros for a GEO audit in France. The range is wide because the term covers very different realities.
The price depends on four variables: the number of queries tested, the number of AI platforms covered, the depth of the competitive benchmark and whether or not an operational roadmap is included. A diagnostic on ten queries and a single platform has nothing to do with a multi-market audit on one hundred and fifty queries.
| Criterion | One-off diagnostic | Full audit |
|---|---|---|
| Indicative price | 1,500 - 2,500 EUR | 3,000 - 8,000 EUR |
| Queries tested | 10 to 30 | 50 to 150 |
| AI platforms | 1 to 2 | 4 and more |
| Competitor benchmark | Summary | 3 to 5 competitors in detail |
| Technical audit | Overview | Page by page |
| Roadmap | General recommendations | Prioritized, executable plan |
A word of caution on price. An audit billed under 1,000 euros is almost always a semi-automated report with no human analysis. Conversely, above 8,000 euros, you are often paying for a brand more than a method. The value concentrates in the middle range, provided all six deliverables are present.
The progress figures announced by a case study should always be read as illustrative: no audit guarantees a quantified result, because no one controls the AI models.
The questions to ask before you sign
Four questions are enough to separate a serious provider from an opportunist riding the GEO wave.
First question: how do you measure my AI share of voice, and on how many queries? If the answer stays vague or rests on a single prompt in ChatGPT, run. A credible audit rests on a documented, reproducible query corpus.
Second question: which platforms do you test? A provider who covers only ChatGPT ignores Perplexity, Gemini and AI Overviews. Reminder: 50% and more of Google queries already trigger an AI Overview. Ignoring them means auditing half the terrain.
Third question: does your audit include the technical layer and off-site authority? Many limit themselves to on-page content. Yet LLMs do not execute JavaScript and external authority weighs more than Domain Rating. An audit that skips these two dimensions is incomplete.
Fourth question: what exactly do you deliver, and on what timeline? Demand the list of the six deliverables and a schedule. A full audit takes two to four weeks. An instant deliverable is an automated report, not an audit.
A well-conducted GEO audit does not sell you a dream. It gives you a starting figure, a map of your competitors, a list of prioritized fixes and a timeline. The rest is a matter of execution. To understand how these audits fit into a complete strategy, discover our approach as a GEO agency.
Request your free GEO audit. We show you where you are cited, where your competitors outrank you, and what to fix first.
Questions fréquentes
What is the difference between an SEO audit and a GEO audit?+
An SEO audit measures keyword rankings on Google's results pages. A GEO audit measures citations and mentions in AI-generated answers. The first tracks a ranking, the second tracks a presence within a synthesis. The two are complementary, but the method and the deliverables differ completely.
How much does a GEO audit cost in France?+
The market ranges from 1,500 to 8,000 euros. A one-off diagnostic on a limited scope runs around 1,500 to 2,500 euros. A full audit with competitive benchmark, technical audit and roadmap sits between 3,000 and 8,000 euros depending on the number of queries and markets covered.
How long does a GEO audit take?+
Between two and four weeks for a full audit. The timeline depends on the number of AI platforms tested, the volume of queries run and the depth of the competitive benchmark. A quick diagnostic can be delivered in a week.
Does a GEO audit guarantee citations in ChatGPT?+
No, and any provider who guarantees it is lying. The audit identifies the levers and prioritizes the actions. Citation then depends on execution, on the brand's off-site authority and on time. No player controls the AI models. Be wary of promises of quantified results by a fixed date.
