Find the best SEO agencies in London. Compare top-rated SEO companies and choose the right partner for your business.
London, United Kingdom
Based in London, this agency operates under the name of Matthew Woodward and focuses exclusively on search engine optimization, with a small team han…
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London, United Kingdom
Operating from Farringdon in London and from Dubai Media City in the United Arab Emirates, Sectorlight works with international real estate brands an…
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London, United Kingdom
Based in London, Selteq Ltd is a software and technology company working with organizations across more than 20 countries, spanning sectors such as h…
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London, United Kingdom
Based in London, Semantic Minds is a small digital marketing agency working with small businesses and SMEs across sectors such as education, professi…
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London, United Kingdom
Founded in 2013 and based in London, Semetrical is a small digital marketing team that works with businesses ranging from global multinationals to st…
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London, United Kingdom
Semtelligence Limited is registered in London, though its contact address is listed at Orchard Studios in Sedgefield, Stockton-on-Tees, Cleveland. Th…
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London, United Kingdom
Based in London, Senotrix Ltd is a small digital marketing team, sized between one and ten people, working with small businesses across the UK. The a…
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London, United Kingdom
Operating out of London since 2013, this small agency (team of 1-10) works with small and medium-sized businesses seeking local search visibility wit…
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London, United Kingdom
Paul Hoda operates as an independent SEO consultant based at Kemp House on City Road in London, working with businesses across the UK since 2005. The…
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London, United Kingdom
A small agency based in London, working with businesses that want to be found by local and international customers searching for their products or se…
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London, United Kingdom
Based in London, SEO Pages works with UK trades and local service businesses—plumbers, electricians, cleaning companies, dental practices and similar…
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London, United Kingdom
Based in London and founded by Simon Gilbert, this small agency (1–10 staff) positions itself as a budget-focused option for London businesses seekin…
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Based in Covent Garden, London, SEO Thing is a small consultancy trading as Marketing Thing Ltd, operating with a team of ten or fewer. It works with…
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London, United Kingdom
Based in London, Seo Website Design is a small agency (team of 1-10) offering website design and search engine optimisation services to businesses in…
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London, United Kingdom
Operating from an office in Harrow, London, since 2008, SEO-agency.co.uk is part of the Reposition Group and works as an SEO Partner service for agen…
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London, United Kingdom
Operating from London under the personal brand of Lukasz Zelezny, this consultancy positions itself around a single named practitioner rather than a…
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London, United Kingdom
Based in London, SEOBoost is a small SEO growth marketing agency working with businesses that are investing in long-term organic growth. The team, si…
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London, United Kingdom
Based in London, seoXpert Marketing Agency is a small team of one to ten people offering digital marketing services aimed specifically at small busin…
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London, United Kingdom
Based in London, Serpranky is a small SEO and content marketing team offering website owners a link-building focused approach to improving search vis…
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London, United Kingdom
Based in London, this small digital marketing agency describes a particular focus on healthcare, travel, education and tech sector clients, working w…
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The complete migration playbook: what to freeze before launch, how to build a redirect map that actually holds, what to test on the staging site, and how to read the first eight weeks after go-live.
2026-08-02 · 12 min read
How B2B search really works: bottom-of-funnel pages before blog volume, comparison and alternatives content, product-led assets, and attribution that survives a six-month cycle.
2026-08-02 · 11 min read
When template-generated pages work, when they get ignored, and how to build a programmatic set that survives quality updates: real data, real demand, real internal linking.
2026-08-02 · 11 min read
726 agencies are listed in London, 19% of the 3,907 recorded in United Kingdom — the country's largest city by agency count. 659 publish a direct contact.
In London: SEO (97%), SEA/PPC (54%), Social Media (51%), Web Design (50%), Content Marketing (48%). An agency that ticks every box is rarely good at all of them: look at what it puts first.
Proximity genuinely matters in two cases: local SEO — Google Business profile, reviews, "near me" queries — and needing to meet in person. For an e-commerce or SaaS site targeting the whole country, an agency in London holds no structural advantage over one elsewhere in United Kingdom. The useful criterion stays experience with your type of site.
| Team size | London | Typically |
|---|---|---|
| 1-10 | 526 (72%) | Solo consultant or small studio. Direct access, limited capacity. |
| 11-50 | 108 (15%) | Separate roles: technical, content, link building. |
| 51-200 | 3 (0%) | Structured accounts, process, formal reporting. |
| 200+ | 8 (1%) | International group, enterprise accounts. |
The 726 agencies on this page are ordered by how complete their listing is, never by payment: no position is for sale here. The information is collected from each agency's own website, checked as live. An agency can claim its listing to correct it, complete it, or connect its Search Console data.
What does SEO cost in London? Stated engagement floors here start at $1,000+. That figure says what size of engagement the agency takes on, not what yours will cost: the quote depends on the state of the site, the competition and the volume of content to produce.
Small local agency or large firm? 72% of agencies in London have fewer than ten people. At that size you talk directly to whoever does the work — the main advantage, and the main limit the day the engagement grows.
How do you check an agency before signing? Ask for a measured case on a site comparable to yours, with before and after figures. Check who will actually do the work. And get it in writing what stays yours when the contract ends: content, access, accounts.
All agencies in United Kingdom · Agencies by country · SEO guides
