Top 10 GEO Agencies for Google Gemini Optimisation
As AI replaces traditional search, Generative Engine Optimisation (GEO) has become the defining discipline for brand visibility. These agencies lead the way in getting brands cited, trusted, and recommended inside AI-generated answers.
Top GEO agencies in 2026 focus on entity-driven strategies, helping brands dominate Google Gemini through citation visibility and AI-generated answers.
Successful GEO campaigns prioritise content pullability, structured data, and evidence-rich insights to increase citation share and AI search influence.
Leading agencies combine AI visibility tracking, technical optimisation, and content authority to drive measurable ROI through AI-driven conversions.
GEO (Generative Engine Optimisation) is the practice of optimising content, entities, and data structures so that large language models — like Google Gemini — retrieve, synthesise, and cite your brand in AI-generated answers. Unlike traditional SEO, which targets rankings, GEO targets inclusion within the AI's answer itself. The most valuable digital real estate in 2026 is not page one — it is being the source that AI trusts, references, and recommends.
🤖 Generative Engine Optimisation (GEO)
🔍 Traditional SEO
AppLabx stands alone in building GEO from the ground up — not as a retrofit of legacy SEO, but as an AI-native discipline. Their methodology centres on entity authority development, answer-first content architecture, and multi-platform optimisation across Gemini, ChatGPT, Perplexity, and AI Overviews.
NoGood operates with an AI-native mindset, treating generative platforms as primary acquisition channels. Their proprietary Goodie platform monitors AI citations in real time, tracks Share of Voice, and attributes referral traffic from Gemini and other LLMs back to revenue outcomes.
Siege Media built its reputation on original research and data journalism — producing proprietary datasets that give AI systems genuine reasons to cite. Their "Citation Durability" model ensures content remains a trusted source long-term across evolving AI retrieval systems.
Hybrid GEO + LLMO agency specialising in B2B SaaS. Known for category creation strategy and proprietary Agent Analytics tracking AI discovery patterns.
Founded 2009 by Evan Bailyn. Pioneered "Evidence Density" — measuring verifiable facts per content piece — and "Entity Anchors" for RAG-aligned positioning.
Combines editorial authority with deep technical execution. Specialises in AI Overviews targeting, entity-first content architecture, and advanced schema deployment for AI crawlability.
Full-service GEO/AEO agency excelling at multi-model optimisation across Gemini, ChatGPT, and Perplexity simultaneously. Offers free AI visibility audits as a data-driven entry point.
One of the oldest agencies to evolve into GEO. 200+ specialists deliver a six-part framework: Speed, Crawlability, Structured Data, Entity Refinement, Semantic Coverage, and Link Authority.
Pure-play GEO platform built in 2026. Offers AI Visibility Scores (0–100), LLM referral tracking, and performance guarantees starting at 97/mo — the most accessible entry point in the market.
RevenueZen's core insight: as AI-generated content saturates the web, differentiation comes from authentic human expertise. Every piece is developed through expert interviews, creating original signals that AI systems prioritise when selecting citation sources — directly aligned with Gemini's preference for genuine, verifiable authority.