Find the best SEO agencies in London. Compare top-rated SEO companies and choose the right partner for your business.
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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London, United Kingdom
Based in London, Charle works exclusively within the Shopify ecosystem, building and growing stores for ecommerce brands rather than serving business…
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Charles Travers is a London-based SEO consultancy operated as a sole practitioner, working exclusively with Shopify ecommerce brands in the $1M–$10M…
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London, United Kingdom
A small web agency based in Chelsea, London, Chelsea Web Designs works with businesses of varying sizes looking to establish or improve their online…
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Clarity Performance is a London-based digital marketing agency specializing in B2B marketing strategies tailored for technology, software, and SaaS c…
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London, United Kingdom
Based in Reading, Berkshire, with a listed London office presence, CLD is a small digital agency working with businesses whose websites need to funct…
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London, United Kingdom
ClickDo is a small London-based digital marketing team offering search engine optimisation, social media marketing, conversion optimisation and web d…
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London, United Kingdom
A boutique team operating out of London, ClickSlice works with ecommerce and other online brands looking to grow visibility across both traditional a…
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London, United Kingdom
Codematic Technology Services is based in London and works with businesses across Europe, Africa and the United States, with a small team handling cl…
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London, United Kingdom
Based in London, England, with an additional presence serving clients in the United States, Codener is a software development company operating with…
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London, United Kingdom
Headquartered on Shelton Street in London, Codezela Technologies works with UK businesses seeking digital transformation and AI-driven systems alongs…
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London, United Kingdom
Based in Stratford, East London, Coding Wallet works with local businesses seeking a digital marketing partner able to combine web development, searc…
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London, United Kingdom
Based in London, Cogworks builds enterprise Umbraco platforms for organisations in charities, financial services and professional services. Founded i…
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London, United Kingdom
Based in London, ColdChain Agency works exclusively with crypto, blockchain, fintech and Web3 projects, serving clients ranging from crypto exchanges…
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London, United Kingdom
Congruent Marketing is a small digital marketing agency based in London, working with a team of ten or fewer people. It positions itself around a val…
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London, United Kingdom
Based in London, Content Mills positions itself as a content writing provider working with businesses across a range of industries, both in the UK an…
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London, United Kingdom
Based in Canary Wharf, London, Coretium Media is a small digital marketing agency operating with a team of 1-10 people. Its stated focus is on achiev…
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London, United Kingdom
Cornerstone Group is based in London and works exclusively with businesses in the built environment, covering construction, manufacturing, architectu…
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London, United Kingdom
Costin Botez trades as a solo WordPress developer based in London, working with established UK businesses across a range of industries rather than on…
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London, United Kingdom
Based in London, Count SEO works with UK businesses across cities including Birmingham, Manchester and Leicester, positioning itself around low-cost…
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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
