Find the best SEO agencies in London. Compare top-rated SEO companies and choose the right partner for your business.
London, United Kingdom
Founded in 2008 and based in London, Silicon Technix specialises exclusively in web design for dental practices, working with NHS and private dental…
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London, United Kingdom
Based in London, Pure Reputation focuses specifically on online reputation management rather than broader digital marketing, working with both indivi…
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London, United Kingdom
Founded in 1996 and based in London, Sitelynx works with organisations navigating the shift from traditional search to AI-driven discovery, including…
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London, United Kingdom
Based in London, Sixtwo is a small website design agency working with a range of businesses, from specialist manufacturers and highways contractors t…
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London, United Kingdom
Based in London, SK Web World UK has operated since 2011 with a small team offering digital marketing services to businesses across various industrie…
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London, United Kingdom
Based in London, SKlead is a small digital marketing practice run as a one-person consultancy under the name Kirill, offering PPC and digital adverti…
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London, United Kingdom
A small digital marketing team based in London works with small businesses and larger companies looking to strengthen their presence across search en…
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London, United Kingdom
A small team based in London, Slate works with clients on website and digital projects handled through a compact, in-house group of one to ten people…
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London, United Kingdom
Based in Kent, United Kingdom, Smart Call Solutions is an inbound call center and customer service outsourcing company established in 2022. It works…
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London, United Kingdom
Based in Croydon and serving small and medium-sized businesses across Croydon and Surrey, Smart Cow Marketing operates as a small team offering websi…
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London, United Kingdom
SME Media is a web design and digital marketing agency with offices in Holborn, London, and Staines-upon-Thames, Surrey, serving small and medium-siz…
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SMMart is a London-based digital marketing agency specialized in delivering comprehensive social media management and marketing solutions. With a mis…
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London, United Kingdom
Operating from Hatton Wall in London, Snack Media works within the sports publishing sector, acting as a connector between online sports communities…
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London, United Kingdom
From an office on Station Road in South London, Social Bees works with UK service-based businesses looking to generate leads and sales through digita…
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London, United Kingdom
Based in London with additional studios in Dubai and Sydney, Social Chameleon works with brands across EMEA, MENA and APAC that operate in categories…
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London, United Kingdom
Based in London, this agency has operated since 2007 with a small team serving businesses across sectors including aesthetics, skin clinics and walk-…
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London, United Kingdom
Based in London, SoftGlaze is presented as the development studio of a single named developer, Azhar Ali, who describes handling the coding work pers…
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London, United Kingdom
Founded in 1998 and based in London, Softech Systems Pvt. Ltd. is a technology and digital services provider with a team of 11-50 people, serving bus…
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London, United Kingdom
Based in London, this agency works exclusively with law firms and solicitors across the United Kingdom, combining legal and marketing backgrounds wit…
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London, United Kingdom
Somi Buzz operates from London and works with B2B businesses across the UK, Ireland, USA, Canada, Australia, New Zealand and the Middle East. Rather…
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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
