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 with additional offices in Cardiff and Hastings, Sotic operates as a small digital agency with a specific focus on the sports sector.…
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Sova Infotech is a leading web development and SEO agency based in London. They specialize in creating bespoke websites and providing exceptional dig…
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A small team based in Richmond-Upon-Thames, London, Space Galleon works with businesses and brands seeking a digital presence built around websites,…
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London, United Kingdom
Based in London, this agency focuses exclusively on B2B companies looking to generate qualified leads and grow revenue through their marketing pipeli…
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London, United Kingdom
Founded in London in 2018, SpaceWorks specialises exclusively in Squarespace website design and development, working as an official Squarespace Exper…
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Based at Cornhill in London, with an additional US address in Wyoming, Spark SEO is a small team working with brands aiming for national reach across…
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London, United Kingdom
A founder-led digital marketing agency serving businesses across Glasgow, Edinburgh, Aberdeen and Dundee, as well as clients elsewhere in the UK and…
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London, United Kingdom
Based on Clifton Street in Shoreditch, London, Splendid Communications is a small communications agency, with a team of between one and ten people, d…
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London, United Kingdom
Based at Mill House on Mill Street in London, Springetts Brand Design has worked since 1976 with clients concentrated in the food and drink sector, i…
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London, United Kingdom
Square Balloon is a small London-based agency working with businesses of varying sizes, including start-ups and small owner-run companies moving into…
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Based in London, Screencult positions itself as a boutique corporate communications consultancy with two decades of experience in story-led video for…
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London, United Kingdom
Starberry works specifically within the property sector, building digital services for estate agents and property developers. Based in London with an…
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London, United Kingdom
Steel London was a digital marketing agency based in London, specializing in various online marketing services. The agency focused on providing clien…
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London, United Kingdom
Based in London, Stefanie Grant Ltd is a small marketing consultancy operating as a solo practice, working with founders and leadership teams who lac…
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London, United Kingdom
Headquartered in London with additional regional hubs in New York, Manchester, Amsterdam, Singapore and Shanghai, Stein IAS focuses exclusively on bu…
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London, United Kingdom
Based in London, Stellar Search has offered digital marketing services since 2008, working with organisations ranging from lean startups to multinati…
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London, United Kingdom
Based in Kings Cross, London NW1, Streeten Design is a small web design studio with over 25 years of experience serving businesses in Camden and the…
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London, United Kingdom
London-based studio Studio Smith-Cordell, founded in 2020 by Max Smith-Cordell, works with a small team on bespoke websites and web applications for…
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Stylo Design is a London-based brand, design, and digital consultancy that specializes in creating highly considered brand identities. They apply the…
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London, United Kingdom
Based in the Tea Building on Shoreditch High Street, SUM Design works with founder-led luxury and lifestyle brands, spanning established names and em…
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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.
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