A GEO audit measures a brand's real visibility within answers generated by artificial intelligence: ChatGPT, Perplexity, Gemini, AI Overviews. It is not the same as a classic SEO audit. The logic changes: you no longer track keyword positions, you track citations and mentions within synthetic answers. A serious GEO audit answers three questions. Are you cited when a prospect asks an AI about your market? Why are your competitors cited more than you? Which pages must be fixed to reverse the trend? The expected deliverables are a quantified AI share of voice, a competitive benchmark, a technical citability audit and a prioritized roadmap. On pricing, the French market ranges from 1,500 to 8,000 euros depending on depth. Here is the complete method, the six deliverables and the questions to ask before signing.
What a GEO audit really measures
A GEO audit measures your presence within answers generated by artificial intelligence. Not your Google positions. Your citations in ChatGPT, Perplexity, Gemini and AI Overviews.
The distinction is fundamental. In SEO, you track a ranking: position 3 on a query beats 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 entirely 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, where an SEO audit settles for a single engine.
The signals the audit examines
Three families of signals fall outside the classic SEO frame 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 previous 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. YouTube presence shows a correlation of 0.737, Wikipedia accounts for 47.9% of ChatGPT citations, while Domain Rating caps out at 0.266.
A GEO audit does not replace an SEO audit. It measures a different terrain: presence within synthetic answers, not a ranking of links. The two complement each other, but conflating them leads you to pay for the wrong deliverable.
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 reference indicator of the audit. 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 on 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 initiatives that will move the needle.
AI share of voice is the heart of the system. To understand the mechanics of this indicator and how it is calculated, we lay it all out in our dedicated article on AI share of voice. The competitive benchmark, in turn, relies on a rigorous method described in our guide to the competitive LLM benchmark.
The step-by-step method
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
It all 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 on 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 within Google's AI Overviews. You note the brand's presence, the wording, the cited sources and the mention rank. ChatGPT alone concentrates over 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 observe a gap, but to understand its cause: which sources the AI favors, which formats it cites, which off-site authority feeds those citations. That is the whole point of a well-run competitive benchmark.
Step 4: audit the technical layer
You verify that content is served as static HTML or SSR, that key passages are structured and self-contained, that FAQPage schema is present. FAQPage markup is a strong signal for AI Overviews and deserves particular attention.
Step 5: prioritize
You cross potential impact with implementation effort. The final deliverable is not an observation, it is a sequence of actions executable from the very next week.
Off-site authority weighs more 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 the presence or absence of an operational roadmap. A diagnostic on ten queries and a single platform has nothing to do with a multi-brand audit on a hundred and fifty queries. We break down every range and billing model in our analysis of GEO agency pricing.
| 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 detailed competitors |
| Technical audit | Overview | Page by page |
| Roadmap | General recommendations | Executable prioritized plan |
A word of caution on price. An audit billed at less than 1,000 euros is almost always a semi-automated report without human analysis. Conversely, above 8,000 euros, you often pay for a brand more than a method. Value concentrates in the middle bracket, provided the six deliverables are all present.
The progression figures announced by a client case must always be read as illustrative: no audit guarantees a numeric result, because no one controls the AI models.
The tools used in an audit
A serious GEO audit relies on a combination of measurement tools and human analysis. No single tool is enough: value comes from the expert reading of the data collected.
On the measurement side, several specialized platforms now track AI share of voice, citations by model and evolution over time. To choose the right one, compare their platform coverage, refresh frequency and ability to track competitors. We compiled this overview in our comparison of GEO tools for 2026.
But tooling does not make the audit. A dashboard tells you that you are cited at 12%; it does not tell you why, nor what to fix. It is human analysis that turns raw data into a roadmap.
Want a first estimate before any commitment? Our free GEO audit gives you a quantified starting point: where you are cited, where your competitors outrank you, and the first levers to activate. No credit card, no commitment.
The questions to ask before signing
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 across how many queries? If the answer stays vague or relies 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 covering only ChatGPT ignores Perplexity, Gemini and AI Overviews. Reminder: 50% or 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 by when? Demand the list of six deliverables and a timeline. A full audit takes two to four weeks. An instant deliverable is an automated report, not an audit.
The right reflex: ask for an anonymized report excerpt before signing. A serious provider always has one. The absence of a concrete example is the most reliable warning sign.
A well-run GEO audit does not sell you dreams. 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 positions on Google results pages. A GEO audit measures citations and mentions in AI-generated answers. The first tracks a ranking, the second tracks presence within a synthesis. The two are complementary, but the method and deliverables differ entirely.
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 actions. Citation then depends on execution, off-site brand authority and time. No player controls the AI models. Beware of promises of fixed-date numeric results.
Should a GEO audit be repeated regularly?+
Yes. AI models evolve continuously and your competitors move. An audit is a snapshot at a given moment. To steer a GEO strategy, plan for monthly or quarterly tracking of AI share of voice, and a full audit once or twice a year.
