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SEO in London · 165 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
  • 165 UK agencies offering seo in London
  • Part of the SEO service set
  • Indexed in London
  • Reviewed 17 May 2026
Showing 49-72 of 165 seo agencies in LondonAll SEO agencies
Kinsman & Co logo
Kinsman & Co
Independent·London·2-10 Employees

Kinsman & Co, a London-based all-inclusive marketing agency, is renowned for its extensive range of digital marketing solutions. With specialisation in pioneering video production, strategic social media planning, and effective PPC campaigns, they are the go-to agency for an integrated approach to bolstering your marketing visibility and delivering measurable outcomes. Their proficiency in devisin

Fifty Five and Five logo
Fifty Five and Five
Independent·London·11-50 Employees

Five Fifty Five is an innovative marketing firm nestled in the heart of London, UK. As a unique blend of human ingenuity and advanced AI, this agency offers bespoke marketing solutions and expert advisory services specifically designed for B2B organisations. Their distinctive methodology equips marketing departments with state-of-the-art tools and customised AI-led strategies that excel beyond the

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

Caliston, a leading digital marketing agency situated in the heart of London, champions a unique approach to business growth hacking and website user monetisation. With an impressive track record spanning over 17 years, Caliston has honed its expertise in marketing, design, and development across diverse business sectors in the UK. This top-tier agency stands out, not just for its creative flair a

Studiomade logo
Studiomade
Independent·London·2-10 Employees

Studiomade, a London-based strategic design and digital agency, excels in assisting businesses to thrive and launch innovative ventures through their expertise in branding, technology, and digital solutions. The agency's distinct mission sets it apart, demonstrating its ability to pivot and excel in a variety of industries. With a unique approach towards developing trailblazing projects such as us

nerds agency logo
nerds agency
Independent·London·2-10 Employees

Nerds Agency, a celebrated digital agency situated in London, UK, boasts a wide array of services such as website creation, social media handling, digital marketing strategies, brand crafting, and graphic design solutions. Their dedication to ongoing learning and development sets them apart, keeping them ahead of the curve in industry trends, and ensuring they deliver outstanding results for their

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

Effra, a London-based web design and build agency, specialises in crafting highly functional, CMS-integrated, and mobile-optimised websites customised for start-ups, charities, and SMEs. With over three decades of industry experience, Effra sets itself apart with its transparent, agile methodology and dedication to user-centric design. This ensures not only efficient but also future-ready digital

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

Sixtwo, a London-based website design agency, distinguishes itself through its dedication to crafting unique, compelling websites that instigate dialogue and nurture relationships. The emphasis they place on client-centric experiences promises an enjoyable and immersive design journey. Their comprehensive, customised solutions extend from digital consulting and UX strategy to tailor-made website a

Navigator International logo
Navigator International
Independent·London·11-50 Employees

Based in London, UK, Navigator International is a distinguished digital marketing and storytelling agency. Our unique approach fuses captivating narrative techniques with data-led insights, providing a total 360-degree solution that flawlessly syncs across all digital platforms. Our services are designed to fulfil immediate business requirements while also focusing on enduring brand objectives. We

77 Jakala logo
77 Jakala
Network·London·1000+ Employees

77Agency is a leading digital marketing firm, situated in an undisclosed locale, renowned for its innovative 360° digital marketing strategy. Our comprehensive suite of services includes integrated digital campaigns, creative and media strategies, and website development. We pride ourselves on our localised approach and inventive campaigns. Over the years, 77Agency has partnered with esteemed bran

Brand42 logo
Brand42
Independent·London·2-10 Employees

Brand42, a London-based independent design and digital agency, distinguishes itself through its award-winning methodology in providing strategic branding solutions. Specialising in engaging and globally adaptable digital design, Brand42 is renowned for its unique approach. The innovative one-team strategy employed by the agency successfully bypasses bureaucratic hurdles, thus guaranteeing an exped

Odiono logo
Odiono
Independent·London·2-10 Employees

Based in London, Odiono is a distinguished digital marketing agency renowned for its proficiency in website development, SEO, PPC, and social media marketing. In a strategic move, Odiono has teamed up with TMH Media, thus forming TMH Digital - a robust entity offering a potent mix of digital and offline media services. This alliance offers a unified approach to marketing, optimising the robust cap

Zebedee logo
Zebedee
Independent·London·2-10 Employees

As a leading web design agency headquartered in London, Zebedee is the trusted choice of prominent international brands for the production of visually arresting, high-performance, and sturdy websites. Our clients have the flexibility to choose from our bespoke services or entrust the full process to Zebedee - encompassing everything from web strategy and design, to hosting and continuous support.

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

Editor's note

AgencyIndex tracks 165 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.