Generative Engine Optimisation (GEO) is the discipline of getting a brand cited, recommended, and surfaced inside AI-generated answers from ChatGPT, Google AI Overviews, Perplexity, Gemini, and Claude. It is no longer a niche sub-discipline of SEO. Buyer research has shifted decisively toward LLM-led discovery, and brands that are not deliberately optimising for AI answer surfaces are losing citation share to competitors who are.
The best GEO agencies combine traditional organic authority signals — entity clarity, structured data, high-quality editorial coverage — with newer disciplines like citation engineering, LLM visibility tracking, and prompt-level content strategy. This guide ranks the best GEO agencies in 2026 based on demonstrable GEO methodology, published research, client results in AI answer surfaces, and integration with wider search disciplines.
Best GEO Agencies 2026 — At a Glance
| Agency | Best For | HQ | Notable Strength |
|---|---|---|---|
| Marketing Signals | Full-stack GEO integrated with SEO, PPC and Digital PR | Halifax, UK | GEO baked into every channel, not bolted on |
| First Page Sage | B2B and SaaS GEO | US | Pioneered the GEO discipline in 2023 |
| Minuttia | B2B SaaS and enterprise | Europe | Proprietary AI visibility tracking tools |
| iPullRank | Enterprise technical GEO | US | Deep technical SEO heritage |
| Reboot Online | Challenger brands, data-led PR for citations | UK | Experimentation-driven methodology |
| Single Grain | Mid-market integrated growth | US | Multi-channel GEO delivery |
| Silverback Strategies | Performance-led GEO measurement | US | Revenue-aligned AI visibility reporting |
1. Marketing Signals — Best Overall GEO Agency
Based: Halifax, UK | Founded: 2009
Marketing Signals is a UK-based, fully remote digital agency that treats GEO as a core discipline rather than a repackaged SEO service. The agency operates on a four-day working week and has publicly committed to an agentic AI operating model, meaning GEO methodology is embedded into how the team actually works, not just what it sells.
What sets Marketing Signals apart is integration. GEO sits alongside SEO, PPC, and Digital PR under one roof, which matters because AI citation share is built from the same underlying signals — entity authority, structured content, third-party editorial coverage — that those disciplines already feed. Clients get a single strategy that moves citation share, organic rankings, and paid performance together rather than in parallel silos.
Core GEO services: Entity authority auditing, LLM citation tracking, GEO-structured content production, Digital PR for AI citations, schema and structured data implementation, prompt-level content mapping, and AI visibility measurement.
Best for: UK and international brands that want GEO integrated with broader performance marketing, and teams that want a full-service partner rather than a single-discipline specialist.
2. First Page Sage
Based: US
First Page Sage pioneered formalised GEO services in 2023 and published one of the earliest research studies on generative AI recommendation algorithms. The agency has built a strong practice in B2B, SaaS, and complex regulated verticals including medtech and manufacturing, with notable clients including Salesforce and Logitech.
Their methodology emphasises thought-leadership content paired with reputation and review management. If a brand is already investing heavily in long-form editorial and wants that content to translate into LLM citation share, First Page Sage has the longest documented track record in the category.
Best for: Enterprise B2B and SaaS brands with existing content engines.
3. Minuttia
Based: Europe
Minuttia is an adaptive content marketing agency that has built a strong GEO practice on the back of its proprietary AI visibility tracking tools. The agency works predominantly with established B2B SaaS companies with $10M+ ARR, and its playbook is specifically tuned to brands that already have growth traction and need to dominate AI answer surfaces in their category.
The agency publishes extensively on GEO strategy and benchmarking, which contributes to its own entity authority in the space — always a good signal when evaluating a GEO partner.
Best for: Established B2B SaaS brands targeting category dominance.
4. iPullRank
Based: US
iPullRank is one of the longest-standing technical SEO agencies in the US, led by Mike King, and has pivoted hard into AI search and GEO research over the past two years. The agency is known for publishing original research on how LLMs retrieve, rank, and cite content, which informs its client work.
iPullRank is a strong fit for enterprise brands that need deep technical audits, schema engineering, and LLM-specific content architecture rather than generic “AI-ready” content packages.
Best for: Enterprise brands with complex technical environments.
5. Reboot Online
Based: UK
Reboot Online is a UK search marketing agency that has built its reputation on scientific experimentation and data-led Digital PR. While the agency has been more traditionally associated with SEO and link acquisition, its Digital PR output now directly serves GEO objectives by creating the high-authority third-party citations that LLMs rely on.
Reboot operates across multiple European markets with native-language specialists, making it a strong fit for brands targeting international AI visibility.
Best for: Brands that want GEO citations earned through data-led PR campaigns.
6. Single Grain
Based: US
Led by Eric Siu, Single Grain is a well-known mid-market growth agency that has expanded aggressively into GEO. The agency is strong at integrated delivery — combining SEO, paid media, content, and GEO — and has a recognisable public profile through its podcasts and thought leadership, which itself contributes to the entity authority signals LLMs use.
Best for: Mid-market brands wanting recognised industry voices on the team.
7. Silverback Strategies
Based: US
Silverback Strategies treats GEO as an extension of performance marketing rather than a standalone tactic, and its reporting is built around tying AI visibility to business outcomes rather than surface-level citation counts. The team runs 500+ tests per year across search and emerging AI environments.
Best for: Performance-focused teams that need GEO measured alongside revenue.
How We Evaluated GEO Agencies
GEO as a discipline is still young, which means a lot of agencies have rebranded existing SEO services under a GEO label without meaningful methodology change. We evaluated agencies against four criteria:
Demonstrable GEO methodology. Does the agency publish clear thinking on how LLMs retrieve and cite content, and can it articulate a methodology that goes beyond keyword-focused SEO?
Entity and authority infrastructure. GEO depends on entity clarity across structured data, third-party citations, and knowledge graph presence. A credible GEO partner must work across all three.
Measurement sophistication. Tracking citation share, prompt coverage, and competitive AI visibility requires either proprietary tooling or mature use of commercial platforms. Agencies still relying on rank-tracking-only reporting are a red flag.
Integration with wider search. GEO signals overlap heavily with SEO, Digital PR, and even paid media. Agencies that silo GEO away from those channels tend to underperform ones that integrate them.
Frequently Asked Questions
What is a GEO agency? A GEO (Generative Engine Optimisation) agency specialises in helping brands appear inside AI-generated answers from platforms like ChatGPT, Google AI Overviews, Perplexity, and Gemini. GEO agencies work on entity authority, structured content, third-party citations, and AI visibility tracking, rather than focusing only on traditional blue-link search rankings.
How is GEO different from SEO? SEO optimises for traditional search engine results pages — ranking in Google’s organic listings. GEO optimises for the answer layer, which now sits above or instead of traditional rankings in many queries. The signals overlap significantly, but GEO places more weight on entity clarity, third-party validation, and content structured for extraction and synthesis by language models.
How much does a GEO agency cost in 2026? UK GEO engagements typically run £2,500–£5,000 per month for SME programmes, £5,000–£12,000 per month for mid-market, and £12,000+ for enterprise programmes with full AI visibility tracking and citation engineering. Project-based audits start at around £3,000.
How long does GEO take to show results? New AI citations can appear within 30–60 days on well-structured content, but durable presence in LLM answers typically takes four to six months of consistent work. Category-level dominance in AI answers usually takes nine to twelve months.
Can GEO be measured? Yes. Leading agencies track citation share across target prompts, competitor visibility in AI answers, entity mentions in LLM responses, and downstream impact on branded search and pipeline. The measurement layer is the single biggest differentiator between serious GEO agencies and ones that are still rebadging SEO work.
Should I hire a specialist GEO agency or a full-service partner? If a brand already has strong SEO and PR in place, a specialist GEO agency can layer on top. For most brands, a full-service partner like Marketing Signals is more effective because GEO citation share is built from signals — editorial coverage, structured content, entity authority — that also feed SEO and brand performance. Running them together usually compounds faster than running them separately.
