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, Regroup Media is a digital marketing agency with additional specialist teams in Germany and China, working with businesses seeking t…
View Profile
London, United Kingdom
Relevance operates as a full-service digital marketing agency based in London, with additional presence in Monaco, France, Miami and Canada, allowing…
View Profile
London, United Kingdom
Founded in 2010 and based in London, Reposition.co.uk works with businesses across sectors including property and estate agents, ecommerce and retail…
View Profile
London, United Kingdom
Based in London, Riordan SEO is a boutique agency that has operated for more than twelve years, working with businesses across the UK, including Lond…
View ProfileLondon, United Kingdom
Based in London, Riordan SEO UK describes itself as a boutique agency with more than 12 years of experience serving businesses across London, Manches…
View Profile
London, United Kingdom
Based in London, Rishvi Ltd is a small team, sized between one and ten people, that positions itself as a Linnworks Certified Partner focused on e-co…
View Profile
London, United Kingdom
Operating from Tooley Street in London alongside offices in New York and Adelaide, River Film is a small production company, with a team of between o…
View Profile
London, United Kingdom
RN Digital is a small digital marketing agency registered on Great Portland Street in London, with additional offices listed in Edinburgh, Ireland an…
View Profile
London, United Kingdom
Based in London's Frith Street, ROAST is a mid-sized marketing agency with additional offices in Cape Town, New York and a planned presence in Dubai,…
View Profile
London, United Kingdom
Operating as an independent freelance web designer based in London, Rob Fenech works with a mix of startups, SMEs, and larger corporate clients. The…
View Profile
London, United Kingdom
Based in London, at a registered office on City Road, ROI Clinic is a small marketing agency with a team of between one and ten people. It positions…
View Profile
London, United Kingdom
London-based RT7 Digital works specifically with established Amazon 1P Vendor businesses, including brands running hybrid Vendor Central and Seller C…
View Profile
London, United Kingdom
A small team based in London works as a digital experience and technology agency, combining design, development, and marketing disciplines for busine…
View Profile
London, United Kingdom
Rudo B2B is a London-based agency working exclusively with B2B companies across sectors such as SaaS, manufacturing, recruitment, financial services,…
View Profile
London, United Kingdom
Based in London, this small digital company is directed by founder Tasnimul Rizvi and works with businesses in the UK and USA across various sizes, f…
View Profile
London, United Kingdom
Sam Jay Heaton is a London-based digital marketing agency specialized in delivering innovative and results-driven marketing solutions. With a strong…
View Profile
London, United Kingdom
Sample Digital Lab is a small growth marketing agency based in London, working with SMEs and B2B brands that have established budgets but want more a…
View Profile
London, United Kingdom
Based in London, SAS Online Marketing works with businesses across the UK that need help navigating a fast-changing digital landscape, from small com…
View Profile
London, United Kingdom
Operating from South London, SBC Marketing works with small businesses seeking to build visibility and attract new customers online. The agency is a…
View Profile
London, United Kingdom
Based in London with additional presence in California and New Zealand, Schparkly Creative is a small branding, design and creative strategy studio f…
View Profile
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
