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, Nulynks Website Design positions itself as an AI-driven WordPress website design company serving businesses of varying sizes, from s…
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A small IT consultancy based in London, M.A.J Technologies works with businesses across industries seeking support with digital transformation rather…
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London, United Kingdom
M2Poweri LTD is a small digital agency based in London, England, operating with a team of between one and ten people. Rather than building websites f…
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London, United Kingdom
Based in Crouch End, North London, with a second office in Wilmington, NC, Mac Productions SEO works with local businesses, e-commerce operators and…
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London, United Kingdom
Based at Cordy House on Curtain Road in London's Shoreditch, this small agency (team of 1-10) works across a defined set of industries, including tec…
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Mark Hutchinson Management is a leading independent PR agency based in London, specializing in profile management and impactful PR campaigns for the…
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London, United Kingdom
Based in London and working with clients remotely worldwide, this agency focuses on ecommerce brands generating over $100,000 a month in revenue. Its…
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London, United Kingdom
Based in London, Market Jar positions itself as an organic growth partner for businesses generating £50k or more per month that are looking to expand…
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London, United Kingdom
Operating from London, this practice positions itself as a fractional Marketing Director for UK SaaS, MSP and technology firms, working across start-…
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Founded in 2016 and based in London, Martexy Media Group is a small digital marketing firm working with a team of up to ten specialists. Its stated f…
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London, United Kingdom
A small digital marketing agency based in London, Matrix Digital Ltd. works with businesses across varied sectors, including textiles, education, e-c…
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London, United Kingdom
Based in London, Maxamaze Limited is a small agency, team of ten or fewer, that works specifically with Amazon private label sellers rather than gene…
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London, United Kingdom
A B2B public relations consultancy based in London, Meantime Communications has worked since 2011 with organisations in the global logistics, supply…
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London, United Kingdom
A small team registered in the United Kingdom, Media Bubble Studio Ltd works with brands across the UK, Europe and the Gulf region, offering support…
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London, United Kingdom
Founded in 1975, Media Campaign was one of the first Media Independents in the UK and has continued as an independent media planning and buying agenc…
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London, United Kingdom
Founded in 2019 and based in London, Media Forty Two is an independent, team-owned B2B marketing agency with no external investors. Since 2022 the co…
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London, United Kingdom
Based in London, this independent marketing advisory works with brands rather than running campaigns directly, positioning itself as a partner to mar…
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London, United Kingdom
Based on Grays Inn Road in central London, Medico Digital works specifically within healthcare marketing, connecting health brands with patients and…
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London, United Kingdom
Based in London, Medito Digital has worked exclusively within the Shopify ecosystem since 2015, positioning itself as a specialist agency for brands…
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London, United Kingdom
A small team based in London, MEEDEA works with businesses seeking to manage their online presence under a single provider, offering monthly pricing…
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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
