GEO tool or agency: which one deserves your first budget?

For a first AI visibility budget, a tool is enough when your problem is technical, meaning answer engines cannot read your site properly, and an agency is justified when your problem is editorial, meaning your site is readable but has nothing worth citing. The price gap is a factor of ten to fifty: a tool costs from nothing to a few dozen euros a month, while a GEO agency (Generative Engine Optimization, the practice of optimizing for answer engines) charges French small and mid-sized businesses between €900 and €2,500 a month before tax, according to price grids published by the agencies WeComm in May 2026 and Vigeon in July 2026.

This article describes what each option actually produces, what it costs, when one of them is the right call, and the real cases where the right decision is to spend nothing on either, for now.

What does a GEO tool do, and what does an agency do?

A GEO tool measures and fixes how readable your site is for answer engines; a GEO agency produces the content and the reputation that give those engines a reason to cite you. The two functions barely overlap, which is why the question "tool or agency" is badly framed in most cases: it compares a thermometer with a doctor.

In practice, an AI visibility tool reads your home page and your public files, checks that the answer bots of ChatGPT, Perplexity and Google are not blocked, that your structured data is valid, that an llms.txt file exists, and tells you which signals fail and which are impossible on your platform. The better tools then track, week after week, whether AI assistants cite you on the questions your customers actually ask. All of this can be automated end to end, which is why it is cheap.

An agency does something else: it queries the AI assistants on your real commercial questions, reads the answers, identifies who is cited in your place, decides which pages to write, writes them, publishes them on your platform, and works on your presence beyond your own site, in directories, trade press and reviews. That work is human and slow, and it is what you pay for. Vigeon, in its price grid of July 10, 2026, writes that below €500 a month nobody can seriously produce citable content. It is an agency talking, but the reasoning holds: writing takes days, not seconds.

How big is the price gap, and what are you actually paying for?

In France in 2026, an AI visibility tool costs from €0 to a few hundred euros a month, and a GEO agency between €900 and €5,000 a month before tax depending on the scope. The two agency grids opened for this article agree with each other. WeComm (published May 13, 2026, updated May 26) places the entry level for a small business between €900 and €1,500 a month, the middle tier between €1,500 and €2,500, full service between €2,500 and €5,000, and an initial audit between €1,500 and €5,000 before tax. Vigeon (July 10, 2026) gives €950 to €2,500 a month for a small or mid-sized business, €3,000 to €5,000 for a large company, and €1,500 to €3,500 for the initial audit. WeComm also places monitoring tools between €99 and €499 a month.

One caution applies: these figures are published by agencies selling the very service they are pricing. They give a credible order of magnitude because two sources independent of each other converge, not because a neutral body measured them. No independent study of the average price of a GEO engagement in France was found for this article.

Biencité's prices are public: the scan is free, monitoring costs €24 a month on Starter (1 site, 5 questions tracked every week) or €39 a month on Pro (15 questions a week across 5 AI assistants), €149 for 5 sites and €359 for 15 sites; a done-for-you installation, a one-off on top of the subscription, costs €290 or €490, and custom work is billed at €400 a day. The details are on the /fr/tarifs page. What matters for the decision is the logic of the price: a tool charges for a repeated measurement, an agency charges for days of human work.

• Tool: €0 to a few dozen euros a month. You pay for a measurement, an action plan and generated files. You handle, or delegate, the deployment and the writing.
• One-off installation: a few hundred euros, once. Someone deploys the technical fixes for you, then the tool takes over again.
• Agency: €900 to €2,500 a month before tax for a small business, with a commitment of several months. You pay for writing, publishing and human steering.

When is a tool enough?

A tool is enough when your site already has content an AI could cite and the blocker is technical, which is the most common situation for small businesses that have owned a website for several years. The symptoms are easy to recognize: carefully written service or product pages, customer reviews, but no llms.txt file, structured data missing or broken, and a robots.txt that blocks answer bots out of excess caution. There, a scan lists the signals, an action plan ranks them, and the fixes deploy in a few hours through a WordPress extension, a Shopify integration or an export for a coded site.

A tool is also enough when someone in-house writes well and has half a day a week. The tool tells that person what to fix, in what order, and shows them every week whether AI assistants are starting to cite the company on concrete questions. That loop, measure, fix, measure again, is what an agency charges dearly for when it runs it on your behalf.

Finally, a tool is enough when your platform limits what an agency could do anyway. Shopify, Wix, Webflow and Framer lock certain files at the root of the site. Paying a monthly fee for fixes the platform forbids makes no sense; an honest tool flags those signals as impossible instead of counting them against you, and focuses you on what remains feasible. The article "Shopify, Wix, Webflow, Framer: what your platform actually lets you do for AI" goes through those limits platform by platform.

When is an agency the right choice?

An agency is the right choice when your site is technically readable but has nothing to cite, and nobody on your side can or wants to write. An answer engine does not cite a slogan or an "Our values" page; it cites a fact, a figure, a comparison, a clear answer to a precise question. If your site is five pages with no factual content, no tool will change the verdict, because there is nothing left to measure once the technical fixes are in. The article "How long before you see an effect on your AI visibility?" describes the two clocks: readability is fixed once, selection by AI assistants is built over time, and that second clock is editorial work.

An agency is also justified when external reputation is missing. Generative AI cross-checks its sources: a site cited nowhere else, not in a professional directory, not in the local press, not in a business listing, has little chance of being retained, whatever the quality of its markup. Building that off-site presence takes time and relationships: it is agency or freelance work, and a tool will not do it for you.

If you choose an agency, demand dated measurements. Vigeon, itself an agency, sets that criterion in its own price grid: dated citation records, engine by engine, with screenshots, are the only admissible proof. An agency that promises guaranteed citations is not telling you the truth, because nobody controls an AI's answer. An agency that reports every month, on the same questions, who is cited and who is not, earns its fee. The difference shows on the first quote.

When should you choose neither?

In three situations, the right answer is to spend nothing on AI visibility for now, and it is better to recognize them before signing. First: your customers do not ask AI assistants their questions. Search engines and AI assistants coexist rather than replace each other, and a local shop whose customers are mostly over sixty and buy on a neighbour's recommendation has other priorities; the budget is better spent on its business listing and its reviews.

Second: your site does not exist yet, or amounts to a contact page. Neither a tool nor an agency can make a site citable when it has nothing to say; the logical order is to write your service pages with facts first, then measure. Third: your cash flow cannot sustain the duration. Being cited regularly takes several months, and an agency engagement stopped after two months for lack of budget leaves almost nothing behind. In that case, the free scan followed by a one-off technical fix beats a contract you will not keep.

The cost of doing nothing is not zero, though, and it can be measured. Ahrefs published on February 4, 2026 a comparison of 300,000 keywords between December 2023 and December 2025: when an AI Overview appears, the first organic position receives 58% fewer clicks. Since July 22, 2026, those overviews have been live in France, the last major market to receive them. Doing nothing is a defensible choice in the three situations above; it has to remain a choice, not an oversight.

How do you decide within a week, without getting it wrong?

The safest way to choose between a tool and an agency is to run the free diagnostic first, because it settles the question in about thirty seconds with no commitment. A read-only scan reads your home page and your public files, installs nothing, changes nothing, requires no account, and returns a verdict on four levels. A site declared unreadable has a technical problem: that is tool territory, and fixing it costs a few dozen euros, not a monthly contract. A site declared readable but cited nowhere has an editorial problem: that is agency territory, or a writer in-house.

Then let the weekly measurement run for a full month before drawing conclusions. If, once the fixable signals have turned green, AI assistants start citing you on your questions, the tool was enough. If, after a quarter of correct readability, no AI cites you while three competitors are cited every week, the problem is no longer technical, and that is the moment, not before, to commit a content budget or an agency. You will walk into the first meeting with a dated measurement, which changes the balance of power on the quote.

One last point deserves to be said plainly: a tool like Biencité measures eligibility, not results. It tells you whether answer engines can read and understand your site, and whether AI assistants cite you today on given questions. It does not promise a citation, because nobody can. The article "How much does an AI visibility audit cost in 2026?" explains why that limit applies to every provider, whatever the price.