Discover the top SEO agencies in United Kingdom. Compare services, reviews, and find the perfect agency for your business.
Liverpool, United Kingdom
Based in Liverpool city centre, Castle International works with a range of businesses across sectors including door manufacturing, homeware retail, l…
View ProfileLondon, United Kingdom
Catalyst Ads Ltd is a London-based digital marketing agency specialized in performance-driven marketing strategies that accelerate business growth. W…
View ProfileBrighton and Hove, United Kingdom
Catalyst Creative Marketing is a Brighton-based digital marketing agency specialized in performance marketing, dedicated to empowering ambitious inde…
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Birmingham, United Kingdom
Founded in 2011 and headquartered in Birmingham, with additional offices in London and Dubai, Catalyst Marketing Agency works with small and medium-s…
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United Kingdom
Catch London is a digital marketing agency specializing in SEO and web development. They focus on delivering tailored strategies to enhance online vi…
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Blantyre, United Kingdom
Based in Blantyre, South Lanarkshire, Catchfish Online is a small team working with local and regional businesses across a range of sectors, includin…
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Burnley, United Kingdom
Based in Burnley, England, Cato Marketing has operated since 2014 as a small team serving clients across the UK, USA and internationally. The agency…
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UK, United Kingdom
Cause Focus is a UK-based digital marketing agency specialized in providing comprehensive graphic and web services tailored specifically for charitie…
View ProfileSalford, United Kingdom
Cayenne Pepper Design specializes in freelance web design and WordPress maintenance for small businesses and individuals. With a focus on creating mo…
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Edinburgh, United Kingdom
Based in Edinburgh, Cazinc Digital was founded by Zach Anthony in the early 2000s and has grown from a one-person operation into a small, close-knit…
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London, United Kingdom
Based in London, this small digital marketing agency works with a range of business types, including property management firms, renewable energy supp…
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United Kingdom
A small UK-based team, CDM Marketing Ltd works with businesses across sectors including cleaning services, asbestos and safety firms, accountancy, ho…
View ProfileUnited Kingdom
CDS Insight, formerly SimpleUsability, specializes in human-centred design thinking to enhance technology utilization and customer experiences. They…
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London, United Kingdom
Based in Bankside, London, with additional offices in Hong Kong and Madrid, Cedar Communications operates as part of the Omnicom network and works wi…
View ProfileManchester, United Kingdom
Cedarwood Digital is a Manchester-based digital marketing agency specialized in delivering award-winning strategies that encompass SEO, PPC, and digi…
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London, United Kingdom
CEEK Marketing is a London-based digital marketing agency specialized in delivering innovative and impactful marketing solutions tailored to the uniq…
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Leeds, United Kingdom
Cefar Ltd operates from offices in Leeds and London, offering web design, development and digital marketing services to businesses seeking an externa…
View ProfileUK, United Kingdom
Centaurus Tech is a UK-based digital marketing agency specialized in providing innovative solutions that empower businesses to thrive in the digital…
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Chorley, United Kingdom
Centre Digital is a Chorley-based digital marketing agency specialized in transforming underperforming websites into lead-generating powerhouses. Wit…
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High Wycombe, United Kingdom
Cerub PR is a High Wycombe-based digital marketing agency specialized in public relations and communication strategies. With a strong focus on buildi…
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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.
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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.
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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.
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This directory lists 3,907 agencies in United Kingdom, spread across 918 cities. 3,443 of them publish a direct contact (email or phone). The best-represented cities are London (722), UK (191), Manchester (123).
| Team size | United Kingdom | What it means |
|---|---|---|
| 1-10 | 2,948 (75%) | One contact, often the founder. Responsive, limited capacity. |
| 11-50 | 429 (11%) | Specialists per discipline. The most common trade-off. |
| 51-200 | 10 (0%) | Several teams, formal process, higher budgets. |
| 200+ | 22 (1%) | International structure, enterprise accounts. |
Across the 3,907 agencies in this country: SEO (94%), Web Design (65%), SEA/PPC (50%), Social Media (47%), Content Marketing (44%), Web Development (38%). SEO leads with 3,655 agencies.
Stated engagement floors in United Kingdom range from $1,000+ to $100,000+. The most common is $1,000+ (953 agencies). That figure is an entry floor, not a price: it says what size of engagement the agency will take on, which stays the fastest filter for ruling out the ones that do not match your scale.
The 3,907 agencies on this page are ordered by how complete their listing is, not by payment: nobody buys a position here. The information comes from each agency's own website, checked as live. An agency can claim its listing to correct or complete it.
Should you pick an agency based in United Kingdom? Proximity matters most for local SEO and the language your content is written in. Here, English and Spanish are the most declared working languages. For an international site, where the agency sits matters less than its experience in your market.
Small or large agency? 75% of agencies here have fewer than ten people, against 32 above fifty. A small team means direct access to the people doing the work; a large one absorbs heavier programmes without depending on one person.
What to check before signing? Ask for measured results on a site comparable to yours, who actually does the work, and what happens when the contract ends: deliverables and access must stay yours. An agency that will not show its method is selling a black box.
