GA Agency

From an office in Soho, London, GA Agency runs international search and paid media campaigns for brands that need to reach customers in many languages at once. Its work is spread evenly across SEO, PPC, content marketing and wider digital marketing, with a strong emphasis on GEO and AI search visibility in Google, Perplexity, ChatGPT and similar platforms.

The agency's main selling point is multilingual delivery: it says its team is made up of in-house native speakers covering markets in Europe, Asia-Pacific, the Americas and the Middle East, with no freelancers or hand-offs to partner networks. It argues that a single integrated agency avoids duplicated account management across regional suppliers. Paid media is described as full-funnel, from performance campaigns to brand awareness, managed locally but with consistent global oversight.

GA Agency was founded by Guido Ampollini, who previously worked at Google and Expedia. It names UniCredit, Expedia, Technogym, Prada and Calzedonia among its clients, alongside startups expanding abroad. The team sits in the 50 to 249 band; minimum project size and hourly rates are not disclosed. It is best suited to multinational or fast-growing brands looking for an international SEO agency in London that can handle several markets under one roof.