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SEO in London · 173 agencies

SEO agencies in London.

SEO is the discipline of earning the right traffic from Google for free, plus - increasingly in 2026 - being chosen, cited, and summarised by AI answer engines like ChatGPT, Perplexity, and Google's AI Overviews. Done well it compounds. Done poorly it's expensive theatre. This page shows every agency on AgencyIndex offering seo in London.

At a glance
  • 173 UK agencies offering seo in London
  • Part of the SEO service set
  • Indexed in London
  • Reviewed 17 May 2026
Showing 73-96 of 173 seo agencies in LondonAll SEO agencies
Square Balloon logo
Square Balloon
Independent·London·2-10 Employees

Square Balloon, strategically located in London, UK, is a distinguished agency specialising in branding, marketing, and digital solutions. The unique factor that differentiates Square Balloon is their holistic approach to business enhancement, which involves offering bespoke design, technology, and marketing services, seamlessly integrated to boost business expansion and productivity. The agency i

Design Culture logo
Design Culture
Independent·London·2-10 Employees

Design Culture, a renowned digital agency in London, excels in crafting customised web platforms, e-commerce solutions and digital services for organisations with a noble cause. Our unique selling proposition lies in our unwavering dedication towards elevating brand comprehension and simplicity, whilst fuelling conversions. We ensure that digital journeys undertaken by users not only impact their

SEOtagg logo
SEOtagg
Independent·London·2-10 Employees

Based in London, SEOtagg is a dedicated SEO agency specialising in providing potent SEO strategies for B2B enterprises. The brand distinguishes itself through its inventive Quantum SEO methodology, offering comprehensive analysis, anticipatory adjustments and all-encompassing integration to enhance all facets of a client's digital presence for superior performance. Utilising advanced machine learn

V8 Digital logo
V8 Digital
Independent·London·2-10 Employees

Situated in the heart of London, V8 Digital has been a leading digital marketing agency since 2002, offering nearly two decades of unrivalled expertise in the digital realm. Our commitment to delivering bespoke marketing solutions that yield impressive ROI results has remained unwavering, constantly surpassing client expectations while respecting their specific needs and budgetary limitations. Pri

One Umbrella logo
One Umbrella
Independent·London·11-50 Employees

As a London-based growth-centric firm, One Umbrella is renowned for elevating business revenue by more than £1M within a single year. Distinguishing itself through the strategic amalgamation of sales, marketing, and operational tactics, One Umbrella delivers bespoke solutions that champion clients within their respective industries. Boasting over a decade of expertise, the agency's proprietary met

Totally Digital logo
Totally Digital
Independent·London·11-50 Employees

As a premier, SEO-centric digital firm hailing from London, Totally Digital stands out for its data-led strategies that markedly amplify organic reach while drawing in top-tier traffic. This efficacy is underpinned by compelling figures including a 400% surge in traffic and more than 1,000 No. 1 rankings. With a solid faith from both established industry giants and cutting-edge startups, Totally D

Summon Digital logo
Summon Digital
Independent·London·2-10 Employees

Summon Digital, a leading digital marketing agency based in London, is renowned for its expertise in the travel sector, providing bespoke services for tours, activities, excursions, travel, and accommodation. What differentiates Summon Digital is their unwavering dedication to supporting independent businesses, driving sales growth and minimising cost per acquisition with personalised, premium sup

Poppins logo
Poppins
Independent·London·11-50 Employees

WE ARE POPPINS, a dynamic creative agency nestled in the heart of London, stands out through its all-encompassing approach. We specialise in delivering a broad spectrum of services, encompassing digital, identity, brand, marketing, and experiential solutions. Our unique selling point lies in our ability to craft immersive community experiences, setting us apart in the competitive landscape. At WE

Digital Aesthetics logo
Digital Aesthetics
Independent·London·2-10 Employees

As a leading marketing agency in London, Digital Aesthetics excels in amplifying brand presence within the health, aesthetics, and beauty sectors. Boasting over 17 years of industry expertise, they provide a bespoke approach to marketing strategy, enhancing both brand awareness and client bookings for aesthetic clinics. Their all-inclusive services comprise SEO, PPC, social media marketing, and we

Breakline logo
Breakline
Independent·London·2-10 Employees

Breakline is a renowned SEO specialist agency, centrally located in Guildford, Surrey. Their unique selling proposition is their dedication to providing unambiguous and fair pricing, personalised SEO tactics, and an emphasis on enduring, viable growth for their clientele. Acknowledged as the top SEO Agency of 2024, Breakline makes a concerted effort to deliver tangible, quantifiable outcomes that

NetTrackers logo
NetTrackers
Independent·London·11-50 Employees

NetTrackers is a premier digital solutions firm situated in London, UK. The organisation is renowned for its extensive array of services, encompassing superior UI/UX design, inventive digital marketing plans, and powerful ecommerce solutions, all customised to fortify businesses in the digital sphere. Concentrating on data-informed approaches and avant-garde technology, NetTrackers guarantees its

Zephyr Digital Agency logo
Zephyr Digital Agency
Independent·London·11-50 Employees

Zephyr Digital Agency is a holistic digital solutions firm, providing specialised services to pubs, restaurants, and traditional retail outlets located in Islington, London. Leveraging a blend of inventive creativity, technical prowess, and insightful data analytics, Zephyr Digital Agency propels businesses towards expansive growth. **Digital Strategy** - At Zephyr Digital Agency, we collaborate

Psycle logo
Psycle
Independent·London·11-50 Employees

Psycle Interactive, a comprehensive digital production agency, operates from its bases in Shropshire, London and Barcelona. Renowned for its innovative application of emerging and established technologies, the agency crafts customised digital solutions - including chatbots, educational platforms, machine learning initiatives and interactive marketing experiences. Leveraging over two decades of ind

Diginow logo
Diginow
Independent·London·11-50 Employees

Diginow is a custom web design agency headquartered in London, renowned for crafting tailored websites and digital business solutions for an eclectic mix of clients. Distinguishing itself through a dedication to utilising cutting-edge technologies such as ReactJS and Angular, Diginow excels in creating visually stunning, feature-packed websites and apps that elevate user engagement and optimise bu

SEO Rocket logo
SEO Rocket
Independent·London·2-10 Employees

SEO Rocket recognises that although SEO isn't akin to rocket science, numerous agencies often overcomplicate it, presenting it as daunting. In our initial stages as startup pioneers, we were taken aback by the pervasive presence of mediocre agencies peddling overpriced services. This revelation fuelled the inception of SEO Rocket: a committed team devoted to offering B2B startups and scaleups an a

SEO·FinanceHealthcareInsurance+1 more industries
Webpop Design logo
Webpop Design
Independent·London·2-10 Employees

At Webpop Design, we specialise in creating insightful websites, interactive databases, and fully adaptable e-commerce platforms, showcasing our proficiency in web design and development. Since our establishment in 2008, based in the heart of London, Webpop Design has excelled in crafting numerous WordPress themes for a broad spectrum of clients across diverse sectors. No project is too small or l

Signify Digital logo
Signify Digital
Independent·London·2-10 Employees

Situated in the heart of London, Signify Digital is a top-tier digital marketing agency with a focus on PPC, SEO, Social Media and Content Creation. What distinguishes us from the rest is our tried-and-tested, individualised approach to crafting cutting-edge marketing strategies, specifically designed to meet each client's distinctive business objectives. We seamlessly integrate with our clients,

KD Web logo
KD Web
Independent·London·11-50 Employees

Known for its cutting-edge web design and digital marketing solutions, KD Web is a comprehensive digital agency headquartered in the heart of London. What truly distinguishes KD Web is its all-encompassing methodology, seamlessly merging web design, progressive development, and tactical marketing to forge powerful and effective digital journeys. With a solid track record spanning over a quarter of

Ledger Bennett logo
Ledger Bennett
Independent·London·2-10 Employees

Ledger Bennett, a premier marketing agency situated in the heart of London, prides itself on fostering customer-centric business expansion. We are renowned for orchestrating an effortless progression from the onset of engagement to enduring customer loyalty. Utilising our profound expertise, Ledger Bennett crafts bespoke marketing strategies that nimbly adjust to our clients' fluctuating needs.

Skywire logo
Skywire
Independent·London·11-50 Employees

Skywire, a premier digital strategy agency, is nestled in the heart of London, offering bespoke solutions tailored to luxury, fashion, and lifestyle brands. Offering an unparalleled blend of inventive content, superior ecommerce development and astute growth strategies, Skywire fuels business expansion. This agency continually raises the bar for its clientele, solidifying their industry-leading po

Byter logo
Byter
Independent·London·11-50 Employees

Based in London, Byter is a digital marketing and social media agency, renowned for empowering businesses to harness the power of social media and advertising for enhanced audience reach and sales growth. Byter's unique selling proposition lies in its comprehensive, all-encompassing approach to social media marketing, offering a seamless, single-point-of-contact service for everything from content

Somebody Digital logo
Somebody Digital
Independent·London·2-10 Employees

Somebody Digital excels in transforming data into powerful business results. Our main focus is on boosting ROI by crafting inventive solutions combined with strategic approaches to improve revenue outcomes. Boasting a team of ex-in-house and agency experts, Somebody Digital is uniquely positioned to act as a trusted and collaborative partner for clients. From PPC and SEO to social media, PR, conte

Complex Creative logo
Complex Creative
Independent·London·2-10 Employees

Complex Creative, an all-encompassing creative agency in London, excels in promoting digital sustainability and assisting clients to reduce their digital carbon emissions. Their distinguishing attributes include a genuine commitment to transparency and authenticity, eschewing industry norms of inflated promises and deficient delivery. Instead, their focus is on crafting high-performance, low-carbo

Marketiu Agency logo
Marketiu Agency
Independent·London·2-10 Employees

Marketiu, a premier digital marketing agency nestled in the heart of London, boasts over nine years of industry experience. Our expertise lies in devising, executing, and automating advanced online marketing strategies, providing an array of services including social media marketing, Google Ads, content marketing, and email marketing automation. Recognised for our award-winning performance, Market

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Editor's note

AgencyIndex tracks 173 seo agencies in London. The list above is filtered to that intersection and ordered with verified and featured listings first.

For the wider editor's view on seo agencies in the UK, see the seo service brief. For context on London's marketing cluster, see the London location brief. The pricing, timeline and red-flag notes below apply to seo as a discipline; they do not change materially in London.

Typical cost
£500-20,000+
per month, retainer

Boutique / freelance £500-3,000 · Mid-market £1,500-7,500 · Network £7,500-20,000+. One-off audits £1,500-10,000.

Realistic timeline
3-12 months
to compounding results

1-3mo technical foundations · 3-6mo ranking and traffic gains · 6-12mo+ revenue compounding.

Red flags
5 to watch
in any pitch
  • · Guaranteed rankings or 'top 3 in 30 days' promises
  • · Pure performance-based pricing (misaligns incentives)
  • · Aggressive link building or 'private networks' (PBNs)
  • · Vague reporting that won't connect to revenue
  • · No request for Search Console + analytics access
Frequently asked

What brands ask about seo agencies.

The 5 questions our editors get most often, answered honestly. These apply to seo as a discipline regardless of city.

Curated by humans

UK SEO retainers in 2026 split into three tiers: boutique consultants and small specialist shops run £500-3,000 a month, mid-market agencies £1,500-7,500, and network or holding-group shops £7,500-20,000+. One-off audits land between £1,500 and £10,000 depending on site complexity. Pure performance-based pricing exists but tends to misalign incentives - Google Search Central itself warns against providers leaning on guarantees rather than process.