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, Insightechs Int Ltd is a small team working with small and medium-sized businesses that need support across web design, marketing an…
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London, United Kingdom
Based in London, InstaHref operates as an online marketplace connecting publishers and advertisers for content placement rather than acting as a trad…
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London, United Kingdom
A London-based B2B marketing agency founded in 2014, Integrated.Social works with senior strategists only, without junior staff or outsourced deliver…
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London, United Kingdom
Operating from London alongside offices in Leeds and Manchester, and forming part of a wider international network that includes Cape Town, Johannesb…
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London, United Kingdom
A small team based in London operates under the name Interweave, describing itself as an ideas and innovation company with a mission to drive change…
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London, United Kingdom
Based in Shoreditch, London, Itineris is a small digital marketing agency, founded in 2001, working with a team of up to ten people. Its client base…
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London, United Kingdom
With offices in London and Manchester, ITPR is a PR agency focused exclusively on B2B technology companies operating in the UK market. The team, made…
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London, United Kingdom
Ivanshigo is based in London and operates as a small team, sized one to ten people, offering a bundled growth service to small and medium-sized busin…
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London, United Kingdom
A small team based in London works with brands, public figures, entrepreneurs and influencers on marketing and communications, with a particular focu…
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London, United Kingdom
With offices in Tokyo and London, JapanBuzz specializes in helping international brands reach Japanese consumers through influencer marketing and soc…
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London, United Kingdom
Based in London, JBi Digital works as an ISO 27001 certified digital transformation agency, positioning security and compliance as a core part of its…
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London, United Kingdom
JKR is a global branding agency that has been helping brands become distinctive since 1990. With a focus on innovative strategies and iconic identiti…
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London, United Kingdom
Operating as an independent SEO consultancy from London, Josh Willett works with businesses across the UK and EU that rely on organic search to gener…
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London, United Kingdom
Based in central London, this small agency (team of 1-10) works mainly in public relations, positioning itself around sectors such as art, fashion, l…
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Jump Agency is a London-based digital marketing agency specialized in delivering innovative solutions that drive measurable results for businesses ac…
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London, United Kingdom
Based in London, with a further office in Greater Manchester, Kanoote Soft is a small team offering both digital marketing and bespoke software devel…
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London, United Kingdom
Based in London, KAU Media Group works as a full-service digital marketing agency with a small team serving businesses across a range of sectors, inc…
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With offices in central London and a second studio in Finchley, KD Web Digital Agency works with a small team on digital marketing for healthcare, e-…
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Kin Studio is a London-based digital marketing agency specialized in delivering innovative and tailored marketing solutions that resonate with the un…
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King Harmsworth is a London-based digital marketing agency specialized in delivering innovative and results-driven solutions for businesses seeking 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
