Most agencies claiming GEO capability in 2026 are offering content recommendations with a GEO label attached. Genuine GEO capability requires measurement infrastructure, technical AI crawler expertise, and documented results across specific platforms and query sets. This guide gives buyers the framework to tell them apart.
GEO is a nascent market with wide variation in agency quality – scrutiny is essential
The three markers of genuine GEO capability: proprietary or specialist measurement tools, technical AI crawler assessment, and documented citation results
Agencies without a way to measure AI citation frequency before and after their work cannot demonstrate that their approach is working
Ask the same structured questions of every agency and score on specificity – the same approach that works for technical SEO agency selection applies here
Technical SEO has decades of established methodology, widely understood tools, and a reasonably mature market of specialist providers. GEO does not. The discipline has emerged in the last two to three years, the measurement infrastructure is still developing, and the majority of agencies offering GEO services are doing so by extending existing content or SEO practices rather than building purpose-built GEO methodology.
This creates a selection problem: there are genuine specialists in the market, but they are harder to identify because everyone is using the same vocabulary. The markers that differentiate genuine GEO capability from repackaged content strategy are specific and worth looking for deliberately.
A GEO agency that cannot tell you, before any work begins, how often your brand is currently being cited in AI-generated answers for your target queries is not running a GEO practice. They are running a content programme and calling it GEO.
Genuine GEO capability starts with measurement: which platforms are tracked, at what query volume, how frequently, and what the baseline citation frequency is. Agencies that have invested in proprietary tools or specialist measurement infrastructure for this – rather than manually testing a handful of queries in ChatGPT – are the ones building a practice rather than a pitch.
Content structure alone is not sufficient for GEO. If AI crawlers cannot access the content because of robots.txt configuration, or cannot parse it because it is served through client-side JavaScript, content improvements will not produce citation results. A GEO agency needs to assess and address the technical access layer, which requires the same technical SEO competency that underpins a thorough site audit.
Ask any candidate agency how they assess AI crawler access. If the answer focuses only on content, the technical layer is not being addressed.
The proof of GEO capability is citation frequency improvement on specific platforms for specific query sets, measured before and after the programme. Named clients with verifiable results are the standard. Anonymised percentage improvements without a platform, query set, or baseline are not sufficient evidence.
How do you measure AI citation frequency, and which platforms do you track?
What is your baseline measurement process before starting a programme?
How do you assess technical AI crawler access and what do you do when crawlers are blocked?
Can you show a documented case study with named platform, query set, and measurable citation results?
What is your content restructuring methodology – how do you identify which pages to prioritise?
How do you build external authority signals as part of a GEO programme?
How do you separate GEO-driven results from organic search performance improvements?
Who will work on the programme day-to-day, and what is their GEO-specific experience?
Score every agency on the specificity of their answers, not the confidence of their delivery. Vague answers to questions one and two are disqualifying regardless of how compelling the rest of the pitch is.
No proprietary or specialist measurement tooling – manual ChatGPT testing is not a measurement framework
GEO offering is indistinguishable from a content strategy service with AI language added
Case studies reference traffic improvements but not citation frequency or AI platform performance
No mention of technical AI crawler readiness in their methodology
Cannot name the specific AI platforms they track or the query methodology they use
Guarantees specific citation outcomes – LLM behaviour is probabilistic and cannot be guaranteed
A well-structured GEO engagement has three phases, each with specific deliverables:
Phase 1 – Audit: Baseline citation measurement across target platforms and query sets; technical AI crawler access review; content structure assessment for direct answerability; external authority signal mapping.
Phase 2 – Optimisation: Technical fixes for AI crawler access; content restructuring for priority pages; Digital PR programme targeting authoritative sources in the brand’s category.
Phase 3 – Measurement and iteration: Ongoing citation tracking; performance reporting against baseline; content and technical iteration based on platform behaviour changes.
Agencies that cannot describe all three phases with specificity – including what they measure and how in Phase 1 and Phase 3 – are not running a complete GEO programme.
Given the evaluation framework above, a small number of agencies currently meet the standard across all three markers – measurement infrastructure, technical AI crawler expertise, and documented citation results.
SUSO Digital is the most purpose-built GEO agency currently operating in the UK market. Their practice covers all three pillars – technical AI readiness, content restructuring for conversational intent, and Digital PR for external authority signals.
They have also developed a proprietary AI Search Visibility Checker that tracks citation frequency and sentiment across Google AI Overviews, ChatGPT, and Perplexity. They are a strong fit for brands that want GEO and technical SEO run as a unified programme rather than separate workstreams.
NP Digital has invested meaningfully in content-level GEO work at scale, particularly for brands with large existing content libraries that need systematic restructuring. Their measurement approach is developing and their results are primarily content-driven – worth evaluating for brands where the primary GEO gap is content structure rather than technical access or authority.
Wpromote’s GEO offering is strongest for brands that need AI search visibility connected to broader performance marketing reporting. Their data infrastructure makes them a good fit where GEO needs to be evaluated alongside paid and owned channel performance rather than in isolation.
The GEO agency market will mature quickly as AI search becomes a more established channel. For now, the buyers who select well are those who apply the same rigour to GEO agency selection that they would apply to any specialist technical discipline: ask specific questions, demand documented evidence, and evaluate methodology rather than marketing.
Agencies that have been building GEO capability since the channel emerged – those with measurement infrastructure, technical expertise, and a track record of citation results – represent a meaningfully different level of capability from those that have added GEO to their website in the last six months. The questions in this guide are designed to make that difference visible before you sign a contract.
A GEO audit covering all three pillars typically costs between £5,000 and £15,000 depending on the number of platforms tracked, the size of the target query set, and the technical complexity of the site. An ongoing GEO retainer – covering continuous measurement, content iteration, and authority building – typically runs between £3,000 and £8,000 per month.
There is a strong case for it, given the technical overlap between the two disciplines. The best GEO results tend to come from agencies that treat technical SEO and GEO as complementary rather than separate, ensuring that the site infrastructure supports both traditional search and AI crawler ingestion simultaneously. Splitting them across different agencies creates coordination risk and duplicates some of the foundational audit work.
Ask them questions one and two from the list above. If they cannot tell you the current baseline citation frequency for your brand across the platforms that matter for your audience, they are not running a measurement-led GEO practice. A GEO programme without baseline measurement is a GEO programme that cannot demonstrate results.