The best GEO agencies for content build pages AI assistants can quote: direct answers, extractable facts, original data. Every agency below publishes named case studies with citation numbers, and each grades 4 or higher on AI content and thought leadership in this directory's evidence scorecard.
Content engineering sits inside its Relevance Engineering framework, and the case numbers are the largest on this list: a global bank generated $2.4 billion in incremental organic revenue, and a financial services client grew sign-ups 121%. Mike King's research output shapes much of the GEO conversation.
Full profile →Visit site ↗Full-service GEO content with a design team attached: Mentimeter's bottom-funnel program generated 250,000 ChatGPT visits, and Instacart earned 46,500 LLM citations. The CEO wrote a GEO book and the blog runs original studies.
Full profile →Visit site ↗My agency. The Technical Content Engine produced 400+ pieces for fraud.net in 6 months, earning 1,230 AI Overview citations and 937,000 monthly impressions. The research hub carries six original data studies.
Full profile →Visit site ↗The measurement-first option: an 11-article optimization sprint earned 414 new AI Overview citations, and an AI-assisted content hub drove $95,700 in attributed revenue. Its original studies span 231,347 LLM responses.
Full profile →Visit site ↗B2B SaaS content at volume with the receipts published: 91 pieces produced roughly 7 million impressions for Toggl, and Meilisearch grew LLM-driven traffic 665%. Original studies cover 24,067 prompts.
Full profile →Visit site ↗The strongest AI content numbers among the full-service generalists: a medical group gained +2,658% Google AI Overview citations, and a shoe brand grew engaged ChatGPT sessions 876%.
Full profile →Visit site ↗Content and design under one roof, documented in the Prometeo case: AI-citable pages, FAQs and guides that drove 357% AI visibility growth and 867% growth in AI referral traffic.
Full profile →Visit site ↗Placements come from the directory's evidence scorecards and each agency's published case studies, checked November 2026. Numbers are the agencies' own published claims, quoted as found.