Find the best SEO agencies in London. Compare top-rated SEO companies and choose the right partner for your business.
London, United Kingdom
KISS Communications is headquartered in Cambridge, with its registered office at the Pitt Building on Trumpington Street, though it is also listed un…
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London, United Kingdom
Know Digital is a London-based marketing agency focused on creating impactful digital solutions. They specialize in delivering beautiful work that dr…
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London, United Kingdom
Based in London, Knowza Learning Solutions works with educational institutions, training providers, and awarding organisations across the UK. The age…
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London, United Kingdom
Konichiwa PR is a London-based digital marketing agency specialized in delivering innovative public relations and digital marketing solutions. With a…
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London, United Kingdom
Krow London, based at the Manufactory (Mission HQ), works with national and international brands across retail, automotive, FMCG and not-for-profit s…
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London, United Kingdom
Krypton IT Services is based in London and works with clients across the UK, US and Europe, spanning industries such as SaaS, non-profit, beauty, eco…
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London, United Kingdom
Operating as a freelance SEO consultant based in London, Krystian Szastok works with B2B companies, though the site also lists dedicated offerings fo…
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london, United Kingdom
KuroNet, based in London, operates as a provider of managed Meta advertising accounts rather than a conventional creative or SEO shop, despite listin…
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London, United Kingdom
LAB Group is a digital experience agency headquartered at Kestrel House in Maidstone, Kent, with a London presence, working with a team of 11-50 peop…
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London, United Kingdom
Operating under the trading name Peak Narrative, Lakewood Media Limited is a small digital agency based in London, England, registered with an office…
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London, United Kingdom
Launch Mappers operates from London and describes its scope as extending across the UK and Europe. The agency positions itself as a growth marketing…
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Lavery Rowe is an award-winning advertising agency with over 40 years of experience in D2C campaigns. They specialize in various media including TV,…
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London, United Kingdom
London-based, LD Communications works within culture and live entertainment, serving artists, festivals, tours, award shows, hospitality brands, arts…
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London, United Kingdom
London-based agency LeadGeneratorsDigital works with businesses seeking to increase website traffic and convert visitors into leads and sales, with a…
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London, United Kingdom
Based in Newington Green, London, Leadiser is a small SEO agency with a team of up to ten people, working with startups looking to improve their sear…
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London, United Kingdom
Based in Tooting, London, Leads 4 Local Ltd works with trades and service businesses such as roofers, plumbers, electricians, landscapers, cleaners,…
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London, United Kingdom
Based in London, Leads 4 Local Pozycjonowanie stron UK works specifically with Polish-owned businesses operating across the United Kingdom, offering…
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London, United Kingdom
Based in London, Leads Nurtured is a small digital marketing agency, with a team of up to ten people, that focuses specifically on lead generation fo…
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London, United Kingdom
Based in London, Ledger Bennett works with B2B organisations on global demand generation and revenue growth, serving clients such as GE Digital, GE V…
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London, United Kingdom
Based in London's Paul Street, LiberateWeb is a one-person web development consultancy run by Jan Kraus, working with small teams and organisations t…
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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
