What Generative Engine Optimization Should Cost: Models, Scope and Red Flags

One agency will quote you $1,500 a month. Another will quote $25,000 for what reads like the same list of deliverables. WebFX, compiling published ranges from across the market, puts agency generative engine optimisation between $1,500 and $50,000 a month depending on company size (WebFX). That is not a price range. That is the absence of one.

Compare a discipline that has settled. Ahrefs surveyed 439 SEO providers and found an average agency retainer of $3,209 a month and 78.2% billing on retainer (Ahrefs). You can argue with that figure, but you can check a quote against it. No equivalent survey exists for generative engine optimisation, because the category is barely two years old commercially.

So rather than invent a benchmark, this piece explains why the numbers scatter, what each pricing model exposes you to, what a legitimate scope contains, and how to spot a relabelled content retainer.

The core position

There is no market rate for generative engine optimisation yet, so scope discipline is the only defence a buyer has. Judge a proposal on what sits inside it and what gets measured, never on whether the number feels about right.

Why generative engine optimization pricing is all over the place

Three things are happening at once, and only one is anybody behaving badly.

The category has no standard deliverable list

In paid search, a retainer implies a recognisable set of activities. In GEO, one agency means prompt monitoring and reporting, another means rebuilding templates so crawlers can read them, a third means twenty blog posts. Price is set by positioning rather than scope, which is why a $12,000 proposal and a $4,000 proposal often contain the same five activities.

The real underlying cost genuinely varies by site

Some of the spread is honest. Vercel and MERJ found that no major AI crawler renders JavaScript. GPTBot fetched JavaScript files in 11.50% of requests and ClaudeBot in 23.84%, but neither executed them, so client-rendered content is invisible. Only Gemini and AppleBot render. The same study found 34.82% of ChatGPT fetches and 34.16% of Claude fetches returned 404s (Vercel).

If your pricing table and comparison grid are injected client-side, your first quarter is an engineering project and costs what engineering costs. If your templates are already server-rendered, that budget goes to content and third-party presence instead.

Some retainers are being rebadged

Here is the uncomfortable part. Much of GEO is good technical SEO and content strategy aimed at a different target. Anyone claiming the discipline is entirely new is selling you something.

Anyone claiming it is just SEO has not read the citation data. Ahrefs analysed 15,000 long-tail queries across ChatGPT, Gemini, Copilot and Perplexity and found only 12% of AI-cited URLs ranked in Google’s top 10 for the same prompt, with roughly 80% absent from the top 100 (Ahrefs). The foundations overlap. The selection mechanism does not. We set out the differences in our breakdown of SEO versus GEO.

The pricing models you will meet

• Monthly retainer. Usually the right shape, because entity strength and citation presence compound over months. The risk is drift: month seven looks like month two and nobody notices, because the reporting never changed.
• Project or sprint. Good for the technical foundation, which is finite work: rendering, crawl errors, structured data, entity consistency. Bad as a whole programme, because third-party presence and original data cannot be built in six weeks. Use it as phase one, with a retainer decision after.
• Audit only. The cheapest way to find out whether you have a problem worth solving, and the easiest to waste. A useful audit tells you what assistants say about you, why, and what is blocking them. A useless one is generic best practice in a PDF. Ask for a redacted example first.
• Tool subscription plus services. Reasonable if the split is transparent. Visibility platforms are a real cost, and WebFX puts tracking software between $50 and $1,000 or more per month (WebFX). The failure mode is a retainer that is mostly licence resale with a screenshot attached. Ask what the fee is minus the tool.
• Performance based. Treat with suspicion. Nobody controls model outputs, citation sets shift without warning, and assistant traffic often arrives unlabelled. Any metric clean enough to bill against is one the agency can game.

The logic matches our piece on what agency pricing should include: you are buying senior hours, tooling and accountability, and a proposal that will not break those out is hiding one.

What belongs in a legitimate scope

• Technical crawlability and rendering. Server-rendered HTML for anything commercially important, clean status codes, and logs confirming GPTBot, ClaudeBot and PerplexityBot reach the pages that matter. The floor, not a bonus.
• Entity and structured data work. Unambiguous facts about who you are and what you sell, repeated across your site, profiles and coverage, with Organization and Product schema behind them. Keep expectations honest: Google states there are no additional requirements to appear in AI Overviews or AI Mode (Google Search Central). Schema is hygiene, not a lever.
• Content restructuring for citation. Rewriting commercial pages so a model can extract a claim and attribute it: question-led headings, specific answers near the top, facts stated not implied.
• Original data and information gain. The one asset competitors cannot copy faster than you publish it: product telemetry, a category survey, a real pricing teardown. Models cite specifics.
• Third-party presence. Review profiles, analyst coverage, community threads, podcast appearances. Assistants build answers substantially from sources that are not your website, so a scope confined to your domain is incomplete.
• Citation monitoring and reporting. A fixed prompt set tracked over time, showing not just whether you are mentioned but how you are characterised, plus log evidence of crawler behaviour.

Those six lines are the test. Run any generative engine optimization services comparison against them rather than against price, because a proposal missing three is not priced wrongly, it is scoped wrongly. Our generative engine optimisation services begin with the audit, because the split between engineering and content work differs for every site and quoting before you know it is guesswork.

The red flags

• Guaranteed rankings or placement in ChatGPT. There is no ranking to guarantee and no inventory to buy. Walk.
• A promised number of citations. Citation sets are unstable and regenerated per query. Anyone committing to a figure is either measuring something trivially easy to inflate or has not tried to deliver it yet.
• No measurement plan. If the proposal cannot say what is tracked, from what baseline, at what cadence, you are buying activity, not outcomes.
• No request for your analytics. Anyone serious wants GA4, Search Console and ideally server logs before quoting, because assistant referrals are badly undercounted.
• Pure content volume. Thirty posts a month is a content mill with new vocabulary. Pew Research, tracking 900 US adults across 68,879 Google searches in March 2025, found clicks on traditional results fell to 8% from 15% when an AI summary appeared (Pew Research Center). Chasing clicks that are disappearing is the wrong response.
• An llms.txt file as a headline deliverable. Google’s John Mueller stated in June 2025 that no AI system uses llms.txt, and that server logs show crawlers do not even request it (Search Engine Roundtable). It takes an hour to add and is not a strategy.

How to sanity check a proposal in three questions

What will you measure, and from what baseline? A good answer names a prompt set, a characterisation benchmark, crawler reachability from logs, and a self-reported attribution field on your forms. A bad answer says “AI visibility” and moves on.

What happens in month one versus month six? Month one should be diagnosis and technical remediation. Month six should be original data, third-party presence and iteration against measured results. If the two look identical, you are funding a treadmill.

What does the reporting look like? Ask for a redacted example before signing. Reporting is where GEO retainers quietly fail, because a mention count rising from nine to eleven can be dressed up as progress.

How to size your generative engine optimization budget

These are our own ranges, based on how we scope the work rather than any published survey. Treat them as reasoning, not benchmarks. Affordable generative engine optimization services are the correctly scoped ones, not the cheapest ones.

• Early stage, under roughly 30 people. A one-off technical and entity audit, then a small retainer or a quarterly sprint. Sensible spend sits closer to SEO retainer levels than enterprise GEO pricing. Fix rendering, define your entity, skip the monitoring platform.
• Scale-up, roughly 30 to 250 people. Where a full monthly programme earns its keep: enough commercial pages to restructure, enough data to publish something original, enough category presence to be worth citing. Expect the first two months to skew technical.
• Enterprise. Cost is driven by coordination rather than the work: multiple properties and markets, legal review on published data, stakeholders each wanting their own prompt set. Budget for programme management, not just optimisation.

The ratio matters more than the total. If more than half the fee is content production in month one, the foundations are being skipped. Foundations also decided the outcome when we rebuilt a publisher’s site structure after the Helpful Content Update and recovered 40% of the lost traffic.

The verdict

Price is the least informative number in a GEO proposal. Scope, measurement and sequencing tell you what it does not. A $4,000 retainer with a defined prompt set, log-level crawler evidence and a plan that changes by month four beats a $12,000 retainer producing posts and a mention count.

Be sceptical of hype in both directions. Genuine generative engine optimization experts will tell you plainly which parts of the work are ordinary SEO. This is not a new discipline that invalidates what you already do, nor a free by-product of your existing SEO. It is a distinct target reached largely through familiar craft, which is why our Search engine runs organic and AI visibility as one programme, not two invoices.

Send us the GEO proposal you are considering and we will tell you what is missing from it.