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London SEO and search marketing agency with a Los Angeles office.
225% increase in organic traffic to service pages within 18 months for AnyVan · agency-reported
Compare 63 SEO agencies with a published business address in United Kingdom, plus 7 serving the area remotely.
Most documented here: Technical SEO (38) · AI Search Visibility (37) · Local SEO (25) · Shopify (8) · E-commerce (5). Counts cover the agencies listed on this site, not the whole market.
Listed A–Z. Order is not a ranking or quality score.

London SEO and search marketing agency with a Los Angeles office.
225% increase in organic traffic to service pages within 18 months for AnyVan · agency-reported

East Midlands marketing agency with offices in Ashby de la Zouch and Nottingham, running SEO campaigns in research, setup and ongoing phases with technical and link building work.

London-based SEO-only agency founded by Adam Collins.
+200% organic traffic for Fleet Evolution · agency-reported
Sheffield performance-marketing agency offering SEO, paid ads, UX and content.

Nottingham ecommerce agency that narrowed its focus to Shopify builds plus ecommerce SEO and PPC.
20% revenue growth in 3 months for Alert Electrical · agency-reported

Nottingham-born performance marketing agency with a dedicated SEO practice covering technical, ecommerce, international and local SEO plus generative engine optimisation.
47,000+ clicks in a year Generative engine optimisation strategy secures 47,000+ clicks in a year · agency-reported
Bromley/London SEO agency serving local and national businesses, with ecommerce SEO, GEO/AI SEO, link cleanup and a reseller programme.
organic search traffic up by over 200% for Ski Line · agency-reported

Independent technical SEO consultant with an engineering background, working directly with clients from London and France.
Global ranking for the term 'change management certification' for APMG International · agency-reported
Leeds-headquartered performance and discovery agency with an Organic Media offer spanning technical SEO, content, digital PR and GEO/AEO visibility in AI platforms, plus paid media,…
triple-digit media value growth Integrated organic strategy drives triple-digit media value growth · agency-reported

Independent London agency covering SEO, digital PR, GEO/AI search and social, with a creative hub in Manchester.
942% growth in LLM traffic for Mogo Farm · agency-reported

Multi-office creative and digital agency (B Corp) whose digital marketing offer includes a dedicated SEO and GEO service built around technical foundations, content and trust-building.

London search marketing agency run by a former client-side digital executive.

Young Bloomsbury agency selling web, content and marketing to service businesses, with SEO pages for technical and local SEO.

Covent Garden digital studio combining web design, SEO and automation.

Digital marketing agency headquartered in Middlesbrough with offices in London, Edinburgh and Brighton.
Holborn-based search-led digital marketing agency with SEO (technical, international, ecommerce, local), GEO and paid media.

London-registered SEO agency with a distributed global team, covering technical, local, enterprise and ecommerce SEO and link building.
Specialist SEO consultancy for news publishers worldwide, based in Cookstown, Northern Ireland and led by Barry Adams.
Belfast web design and digital marketing agency building WordPress sites and layering SEO, content, video and AI training on top.

Brighton-based search, digital PR and performance marketing agency.
Content Strategy Drives 226% AI Overview Growth for PureGym for PureGym · agency-reported
They state they serve United Kingdom but have no published address in United Kingdom.