Discover the top SEO agencies in United Kingdom. Compare services, reviews, and find the perfect agency for your business.
Farnham, United Kingdom
Based in Farnham, Surrey, Six One Creative is a boutique agency that has operated since 2011, working with individuals and businesses across a range…
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Newcastle upon Tyne, United Kingdom
Based in Newcastle upon Tyne, Six Six Marketing is a small consultancy (team of 1-10) working with small and medium-sized enterprises that need help…
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Glasgow, United Kingdom
Based in Glasgow, at 4 Woodside Place, SixBySix is a small ecommerce agency built around Magento and Adobe Commerce, working with more than a decade…
View ProfileUK, United Kingdom
Sixothree is a UK-based digital marketing agency specialized in delivering innovative and effective marketing solutions tailored to the unique needs…
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London, United Kingdom
Based in London, Sixtwo is a small website design agency working with a range of businesses, from specialist manufacturers and highways contractors t…
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Manchester, United Kingdom
A small web design and digital marketing team based in Manchester, Sizzle works with small to medium-sized businesses across the UK. The agency posit…
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London, United Kingdom
Based in London, SK Web World UK has operated since 2011 with a small team offering digital marketing services to businesses across various industrie…
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Birmingham, United Kingdom
Based on Colmore Row in Birmingham city centre, Sketch Creative works with businesses ranging from start-ups to larger, established brands, with a pa…
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Brighton and Hove, United Kingdom
Based in Brighton and Hove, this small team (1-10 people) works as an experiential marketing and PR stunt agency, producing brand activations for UK…
View ProfileUnited Kingdom
Skew specializes in brand extension, combining strategic insight with creative execution to enhance brand licensing. They have worked with notable cl…
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London, United Kingdom
Based in London, SKlead is a small digital marketing practice run as a one-person consultancy under the name Kirill, offering PPC and digital adverti…
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Norfolk, United Kingdom
Skogg Web Design is a Norfolk-based practice run by a single web designer and developer, working with small businesses across the UK. The operator pr…
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Bletchley, United Kingdom
Based in Bletchley, near Milton Keynes, Skweeze Ltd is a small digital agency working with businesses that need a website rebuilt or a digital market…
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Bromley, United Kingdom
Based in Bromley with a presence across London, Skya Designs Limited is a small web design and development agency working with businesses across Sout…
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London, United Kingdom
A small digital marketing team based in London works with small businesses and larger companies looking to strengthen their presence across search en…
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Walsall, United Kingdom
Based in Walsall, this small agency (team of 1-10) provides internet marketing and brand management services to local, national and international bus…
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Leeds, United Kingdom
Slap & Tickle Marketing is based at Park Place in Leeds, offering an in-house marketing team's expertise delivered through an agency structure. The c…
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London, United Kingdom
A small team based in London, Slate works with clients on website and digital projects handled through a compact, in-house group of one to ten people…
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Folkestone, United Kingdom
Based in Folkestone, England, Sleeping Giant Media is a digital marketing agency that has been operating for over 15 years, with a team of 11-50 peop…
View ProfileRotherham, United Kingdom
Based in Rotherham and working with clients across the UK, Sleepy Frog Designs is run by Carol, a solo web designer serving small business owners who…
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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.
