Before you sign a GEO retainer, know what you are paying to fix
Most UK GEO agencies sell you a retainer. I think you should buy the diagnosis first.
GEO, or generative engine optimisation, is the work of getting your business named and cited when people ask ChatGPT, Gemini, Claude or Perplexity for a recommendation. Before you pay anyone to do that work, you need to know why AI engines are not citing you now. That is what OPTIMUM v2.4 is for. It scores your site, shows the evidence behind each score, and gives you a report you can hand to any developer or agency.
This post compares that approach with how UK GEO agencies typically sell. It includes a ready reckoner you can keep, and it says plainly where an agency is the better choice.
How UK GEO agencies sell
UK agencies usually sell a one-off audit, then a monthly retainer. Published UK price guides put the typical retainer at £2,000 to £5,000 a month, with audit or onboarding fees of £1,500 to £5,000 on top. One London guide gives £2,000 to £4,000 for entry-level work and £5,000 to £12,000 or more for advanced programmes.
Few agencies publish prices. In one October 2026 comparison of 20 UK agencies, most said request a quote and a handful showed a monthly fee. The published fees ranged from about £450 to £5,950 a month plus VAT, depending on what they covered. Narrow packages, such as a few tracked prompts or off-site outreach only, sat at the bottom. Broad programmes with content, technical work and PR sat at the top. Minimum terms ran from one month’s notice to twelve months.
These fees buy different work, so they are not like for like. Many agencies also run their own AI tracking tool, so each measures visibility in its own way.
Where agency offers leave gaps
The buyer guides that agencies publish themselves point to the same weak spots, and OPTIMUM is built around them.
- No standard scope. Two fees are not comparable without the scope behind them. OPTIMUM has a published rate card and a defined set of deliverables.
- Each agency measures its own way. A higher visibility score can simply reflect a different sample of questions. OPTIMUM uses one 0 to 10 rubric and a dated Evidence Log, so scores can be compared over time.
- SEO with a new label. Several guides warn that some agencies repackage SEO as GEO. A fixed audit lets you test any proposal against the same standard.
- The audit is commonly a baseline before a retainer. The OPTIMUM report stands alone and can be taken to any supplier.
- Sector depth is uneven. Most agencies work across sectors. OPTIMUM carries frameworks for automotive retail, estate agency, fintech, health tech, accountancy and professional services, and for other industries that rely heavily on website clicks.
The ready reckoner
The table below sets a typical UK GEO agency beside OPTIMUM v2.4, row by row. Keep it, print it, or take it into your next supplier meeting.
| Typical UK GEO agency | OPTIMUM v2.4 | |
| Entry offer | Audit or onboarding at £1,500 to £5,000, then a retainer | Audit £700 (£350 introductory), two-hour discovery included |
| Ongoing work | Retainer, typically £2,000 to £5,000 a month | Advice at £350 a day or £50 an hour. Monthly Citation Watch POA |
| Price visibility | Most say request a quote | Published rate card, no VAT |
| Scoring | The agency’s own tracker and metrics | Fixed 0 to 10 rubric. Now Score, Future Score and Delta |
| Evidence | Reports from the agency’s tracker | Dated Evidence Log behind every score |
| Who fixes it | The agency | Your developers or agency, using the report as the brief |
| Third parties | Often bundled into the retainer | Flagged in the report. Caps the Future Score |
| Compliance | Varies | GDPR and crawler permission checks in every audit |
| Founder visibility | Varies | Checked in every audit |
| Sector depth | Mostly cross-sector | Automotive retail, estate agency, fintech, health tech, accountancy, professional services. Other industries heavily reliant on website clicks |
| Commitment | One month’s notice to twelve months | Fixed-fee audit, then advice by the day if wanted |
Agency figures come from published UK GEO price guides, October 2026. OPTIMUM prices come from the State of the Art Digital rate card dated 19 August 2026, with no VAT. POA means price on application.
What OPTIMUM v2.4 gives you
- A low cost of entry. The audit is £700, or £350 introductory for early clients, and includes a two-hour discovery meeting. That is well below the £1,500 to £5,000 agencies charge for an audit or onboarding.
- A fixed score. Every dimension is scored 0 to 10 on one rubric, with a Now Score, a Future Score and the Delta between them.
- Evidence behind every score. A dated Evidence Log shows how each number was reached, so a re-test is like for like.
- Honesty about what you do not control. Where a gain depends on a third party, the Future Score is capped. The report does not promise results nobody can guarantee.
- Compliance and person-level checks. GDPR status, crawler permissions and founder visibility are checked in every audit.
- A brief you can reuse. Buyer guides advise sending every shortlisted agency the same brief. The OPTIMUM report is that brief, with scores to hold each proposal against.
- Advice without a retainer. Day-rate advice is £350 a day or £50 an hour, on a two-hour minimum. Compare that with £2,000 to £5,000 a month.
If you want more, the next steps are priced on application: the Citation-Cluster Sitemap Blueprint, Build Oversight and Certification, and Monthly Citation Watch.
Where agencies are the better choice
To be fair, agencies win on delivery.
- Delivery capacity. Many agencies bundle digital PR, content and technical work. OPTIMUM designs the work. It does not write pages or place coverage at volume.
- Scale and reach. Larger agencies field big teams with multi-language support, which suits multi-market brands.
- Joined-up channels. Some agencies coordinate GEO with paid search and paid social under one plan.
- Continuous tracking. Many run in-house trackers that monitor answers all month. OPTIMUM re-tests on a schedule and relies on consultant time.
- Small, narrow entry packages. Some start at a few hundred pounds a month plus VAT for tightly defined work.
Which option fits which situation
| Your situation | Best fit |
| You do not know why AI engines ignore you and want a plan before spending | OPTIMUM audit |
| You have developers or an agency but no brief | OPTIMUM audit as the brief |
| You need content and PR delivered at volume | An agency retainer, scoped using an OPTIMUM audit and judged against its scores |
| Enterprise, multi-language, or GEO joined to paid media | A larger agency, with an OPTIMUM audit as the baseline |
| Tight budget and a narrow need | An OPTIMUM-LITE snapshot from £75 introductory, or a small agency entry package |
The two work together. OPTIMUM diagnoses and an agency delivers. It should tell you what that team is being paid to fix.
So before you sign a GEO retainer, ask yourself: do you know what you are paying to fix?
Questions people ask about GEO retainers
How much does a GEO retainer cost in the UK?
One UK price guide puts entry-level programmes at £800 to £2,000 a month, most small and medium businesses at £2,000 to £5,000, competitive B2B work at £5,000 to £10,000, and enterprise programmes above that. Audit or onboarding fees of £1,500 to £5,000 are common on top. Fees buy different scopes, so compare what is included before you compare prices.
What does a GEO audit include?
A typical GEO audit reviews how AI engines describe your business, how your content is structured, your technical setup, and the authority signals that influence citations. It should end in a prioritised list of fixes. An OPTIMUM v2.4 audit scores seven dimensions, backs each score with a dated Evidence Log, and includes a two-hour discovery meeting and a written report.
What is the difference between GEO and SEO?
SEO aims to rank your pages in search results. GEO aims to get your business named and cited inside AI answers on tools such as ChatGPT, Gemini, Claude and Perplexity. The two overlap, and strong SEO foundations make GEO easier, but the measures of success differ.
How can I tell whether an agency is selling SEO with a new label?
Look for four warning signs: no baseline of how AI engines describe you today, no tracking of AI questions, reporting that covers only Google rankings, and a very low price for what is called full GEO. One UK price guide suggests that well under £1,500 a month usually means rebranded SEO. Ask which questions and which AI engines will be tracked, and how often.
Can anyone guarantee that I will appear in ChatGPT?
No one controls what AI engines say, so a guarantee of specific answers should end the conversation. Some agencies offer conditional guarantees on a defined measure. Check the metric, the eligibility, the period and the remedy. OPTIMUM takes the cautious route: where a gain depends on a third party, the Future Score is capped.
How long does GEO take to show results?
UK sources vary. Some report early signs within a few weeks, with more consistent movement over two to three months. Work that depends on third-party coverage usually takes longer. Treat any promise of dramatic change in weeks with caution.
How do I measure whether GEO is working?
Track a fixed set of buyer questions every month. Record whether you are mentioned, whether you are recommended, and whether your own website is cited, and compare that with your main competitors. Add AI referral traffic in your analytics and, most importantly, enquiries. OPTIMUM re-tests against the same Evidence Log, so the before and after are like for like.
Do I need an agency, or can my own team do the work?
It depends on who can carry out the fixes. If you have developers and writers waiting for a brief, a diagnostic report may be enough. If nobody has the capacity, you need delivery, and an agency is the better fit. Either way, work out the gap before you buy.
What should I ask an agency before I sign?
- Can you show me how AI engines describe my business and my competitors today?
- Which questions and which AI engines will you track, and how often?
- What does the fee include: strategy, content, technical work, PR, tools?
- How does this fit with our existing SEO?
- What results have you achieved for businesses like ours, and how were they measured?
- What is the minimum term, and what happens if we stop?
Is there a cheaper way to find out where I stand?
Yes. OPTIMUM-LITE has two snapshot diagnostics. The AI Readiness Diagnostic reviews how ready your website is for AI engines. The AI Citation Diagnostic runs 12 prompts across three AI apps: ChatGPT, Claude and Gemini. Each is £150, or £75 introductory for early clients.
Which industries is OPTIMUM built for?
Automotive retail, estate agency, fintech, health tech, accountancy and professional services, plus other industries that rely heavily on website clicks for business.