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 at Old Gloucester Street, Orchid Box works with B2B companies ranging from startups to global enterprises, describing itself as havin…
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Organic Digital is a London-based digital marketing agency specialized in delivering comprehensive SEO solutions tailored to the unique needs of busi…
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London, United Kingdom
Based in London, this agency works with organisations across retail, SaaS and other sectors, ranging from high-growth D2C brands to established compa…
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Origin is a London-based digital marketing agency specialized in delivering innovative and data-driven marketing solutions. With a vision to empower…
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London, United Kingdom
A small team based in London works with businesses whose brand presentation lags behind the quality of what they actually offer, aiming to close that…
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London, United Kingdom
Osom One is a small digital marketing and web development agency based in London, operating with a team of up to ten people since 2020. Its client ro…
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London, United Kingdom
A small team based in London, Otter Labs works with businesses that want their marketing to reflect a defined ethical, moral or environmental stance…
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London, United Kingdom
OUTloud is a digital marketing agency based in London that specialises in helping brands reach LGBTQ+ audiences. It works with organisations seeking…
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London, United Kingdom
Operating from the SE6 area of London, David Sayce works as an independent digital marketing consultant focused on professional services and B2B firm…
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London, United Kingdom
Papyrus Group is a London-based digital marketing agency specialized in delivering comprehensive solutions that drive measurable results for business…
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London, United Kingdom
Based in London, this agency works as a subscription-based creative studio for B2B tech and services companies, offering on-demand access to a small…
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London, United Kingdom
Based in Putney, in south-west London, PC Macgicians operates as a small IT support and computer repair business serving local individuals and busine…
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London, United Kingdom
Pearl Lemon PPC is a paid advertising agency headquartered in London, founded by Deepak Shukla, that manages campaigns for companies across the UK, U…
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London, United Kingdom
Operating individually from London, Pedro Matias provides SEO consultancy to clients across the UK and internationally, including businesses in Singa…
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London, United Kingdom
Based in London, Peonixis is a small digital agency founded in 2020 that works with businesses seeking to modernise outdated branding, weak site stru…
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London, United Kingdom
A small team based in London focuses its work on niche-specific SEO for small businesses, with dedicated service lines built around particular trades…
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London, United Kingdom
PGWD is a small web design and SEO agency based in London, working since 2000 with businesses in hospitality, construction, e-commerce, and lifestyle…
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London, United Kingdom
Near Borough Market in London, Phipps Relations operates as a boutique communications agency focused specifically on the food, drink and lifestyle se…
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London, United Kingdom
Based in London, this agency focuses specifically on connecting brands with Chinese consumers through Chinese digital platforms, with additional offi…
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London, United Kingdom
Based at 34B York Way in London, Pixelap is a small team, founded in 2019, offering design, development and digital marketing support to businesses l…
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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
