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 a registered office on City Road, The Link Builders Limited is a small team specialising specifically in link building rather t…
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London, United Kingdom
Headquartered in London with additional offices across North America, Europe and Africa, The Media Image describes itself as an independent, internat…
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The Old County is a London-based digital marketing agency specialized in film-oriented web solutions that seamlessly integrate innovative technology…
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London, United Kingdom
Based at 2 Portman Street in London, The One Stop Marketing LTD is a boutique digital marketing agency working with a small team of one to ten people…
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London, United Kingdom
Based in London, this agency positions itself specifically around law firm marketing rather than general SEO work, serving solo practitioners and leg…
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London, United Kingdom
The Small Biz Expert is a small London-based digital marketing agency that works specifically with small and medium-sized businesses across the UK an…
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London, United Kingdom
With offices in London, Bristol, Kent, Dublin and Los Angeles, The Specialist Works positions itself as a media agency working specifically with what…
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Based at 30 Park Street in London, The Team has operated as a brand consultancy since 1982. Its client list includes The Beatles, bp, Colt, and Right…
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London, United Kingdom
A small London-based team offers web design and development services to businesses looking to establish or improve their online presence, with partic…
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London, United Kingdom
Operating from London under the ClickExpose brand, The Website Group works with UK businesses looking to launch or replace a website without paying s…
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London, United Kingdom
Operating from a small office on Chase Road in London, The White Rabbit Digital is a small team of no more than ten people describing itself as a 360…
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the7stars is a London-based digital marketing agency specialized in media planning and buying, renowned for its independent thought and commitment to…
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London, United Kingdom
Operating under the THG Fluently brand from London, THG Ingenuity Ltd. provides localisation services to large, global companies across sectors inclu…
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London, United Kingdom
Operating out of London with a second base in Sheffield, Thinkroom UK is a small digital marketing team (1-10 people) working with businesses across…
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London, United Kingdom
ThirstyFish operates from studios in London and Mumbai, working with brands, businesses, and organisations across both UK and international markets.…
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London, United Kingdom
Based in London with additional offices in Vancouver and Hong Kong, This Is LD is a small agency (Lacoudhir Design LTD, founded 2011) working with en…
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Threepipe is a London-based digital marketing agency specialized in delivering innovative and data-driven marketing solutions that empower brands to…
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London, United Kingdom
Based at Nova South on Victoria Street in Westminster, London, Threepipe Reply operates as part of the Reply group of companies. It works as a full-s…
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London, United Kingdom
Throttl is based at Fitzroy Street in London and works with startups, retailers, B2B businesses, hospitality companies and ecommerce brands seeking o…
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London, United Kingdom
Based in London at Theobalds Road, Times One Hundred positions itself as an embedded digital partner for brands with fans, audiences and communities…
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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
