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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 145-168 of 173 seo agencies in LondonAll SEO agencies
Top Notch Dezigns logo
Top Notch Dezigns
Independent·London·11-50 Employees

Top Notch Dezigns, a distinguished web design and digital marketing agency, is headquartered in London. This agency specialises in crafting innovative and visually captivating web designs that significantly improve conversion rates and yield quantifiable outcomes. Furthermore, Top Notch Dezigns stands out in devising cross-platform web and mobile applications and utilises a performance-oriented di

Reboot Online logo
Reboot Online
Independent·London·11-50 Employees

Reboot Online pioneers a unique approach in digital marketing, blending inventive creativity with technical mastery. Founded in 2006, at the dawn of SEO, Reboot Online consistently investigates potent strategies. Significantly, the firm's experimental SEO techniques have shaped the way global entities and agencies optimise their websites, earning acclaim from industry forerunners. Moreover, Reboot

Medico Digital logo
Medico Digital
Specialist·London·2-10 Employees

Medico Digital, a London-based healthcare marketing firm, excels in linking individuals to superior health outcomes via pioneering digital tactics. This agency stands out for its unique blend of data-informed insights and creative content marketing, which bolsters online presence and effectively engages targeted demographics. Specialising in transforming intricate medical data into comprehensible

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

Digital Litmus, a UK-based B2B marketing and HubSpot agency, shines in the competitive market as an accredited Platinum HubSpot Partner. The agency is renowned for providing an all-inclusive range of services that seamlessly merge sales, marketing, and RevOps, thereby fuelling growth for B2B enterprises. Specialising in forging strategic marketing agendas, optimising websites for lead generation,

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

As a topic of debate for many, Absolute Digital embodies action. With a firm commitment to becoming the preeminent independent digital marketing agency in the UK, Absolute Digital centralises its multifaceted services-SEO, Digital PR, link building, and PPC-as the cornerstone of its success. Crowned as the SEO Agency of the Year 2023, is your marketing strategy primed for a revolutionary enhanceme

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

Heavyweight Digital, a lauded digital marketing agency situated in Chelmsford, Essex, uniquely stands out as a Google Premier Partner, Microsoft Elite Partner, and META Certified Partner. This distinction underscores their unwavering commitment to upholding the highest standards in digital marketing. With a speciality in PPC, SEO, social media campaigns, and web design, their primary objective is

CMI Media Group logo
CMI Media Group
Network·London·1000+ Employees

CMI Media Group, a London-based agency, specialises in strategic healthcare marketing services that are comprehensive and targeted. Our primary service offerings encompass strategic planning, SEM and SEO, social media management, data analytics, and technology consultation, all specifically tailored for the healthcare sector. Our unique value proposition is defined by our proprietary tools, Evolve

Solvid logo
Solvid
Specialist·London·11-50 Employees

Situated in the heart of London, United Kingdom, Solvid is a pioneering agency specialising in SEO, Content, and Digital PR. Its innovative and comprehensive range of services - including SEO, content marketing, copywriting, link building, and digital PR - sets it apart, catering to businesses big and small, driving organic traffic and boosting conversions. Solvid's unique approach to online growt

Creative Brand Design logo
Creative Brand Design
Independent·London·11-50 Employees

Creative Brand Design, a top-rated web design agency in London, excels in crafting unique and engaging digital experiences for both budding and established enterprises. We stand out because of our thorough, step-by-step approach that covers all facets of web design, branding, SEO optimisation, interactivity, and UI/UX, providing top-tier industry solutions. As an agency, we take immense pride in c

LOCALiQ logo
LOCALiQ
Specialist·London·51-200 Employees

Situated in the heart of the UK, LOCALiQ is a top-tier digital marketing agency, boasting a wide reach across over 35 locations nationwide. The unique selling proposition of LOCALiQ lies in its innovative use of in-house AI technology, designed to minimise cost-per-click (CPC) and offer unrivalled transparency through its comprehensive lead dashboard, delivering real-time data insights to clients.

Spark Foundry logo
Spark Foundry
Network·London·1000+ Employees

Spark Foundry, a London-based agency, delivers an extensive assortment of media and marketing solutions, tailored to expedite business expansion. They specialise in areas such as media strategising and procurement, data and technological innovation, analytics and insights, e-commerce, CRM, consumer marketing, and marketplace intelligence. Spark Foundry's unique selling point is their proficiency i

Gripped logo
Gripped
Independent·London·11-50 Employees

Gripped is a UK-based digital marketing agency specialising in the SaaS and tech sectors. What distinguishes Gripped is its commitment to integrating smoothly with client teams, utilising 'already experienced' knowledge, and emphasising crucial metrics to boost pipeline development and revenue. With a customer-centric strategy and proficiency in enhancing tech stacks, Gripped designs bespoke strat

Essence Global logo
Essence Global
Network·London·501-1000 Employees

Essence Global, a London-based agency, provides data-informed, digital-centric media solutions. Recognised for its proficiency in leveraging analytics and technology, the agency excels in crafting bespoke advertising strategies across diverse platforms. Essence Global aids brands in enhancing their media investment for optimal efficiency and significant impact. Serving a broad spectrum of sectors,

Make Agency logo
Make Agency
Independent·London·11-50 Employees

Make is a dynamic digital agency in London, noted for its inventive leadership and performance-based methodology. This agency distinguishes itself with assured influential results across website design & development, digital marketing & social media, and original content, while championing alterations in technology, marketing, and social sectors. Acknowledged as a fast-growing agency within the UK

The Good Marketer logo
The Good Marketer
Independent·London·11-50 Employees

The Good Marketer, a premier digital marketing agency located in the heart of London, is committed to propelling small to medium-sized enterprises (SMEs) to success in challenging markets. Their distinct offering lies in their pledge to seamlessly integrate within their clients' teams, delivering bespoke strategies and expert insights specifically tailored to each business's individual objectives.

Wavemaker logo
Wavemaker
Network·London·501-1000 Employees

Wavemaker UK, a London-based agency, provides an extensive suite of media, content and technology services aimed at enhancing business performance. Key services encompass media procurement and planning, content production and distribution, as well as development of data-driven strategies. Wavemaker's unique selling point lies in their fusion of breakthrough technology and consumer insights to yiel

Mindshare logo
Mindshare
Network·London·201-500 Employees

Mindshare, a London-based agency, specialises in integrated media services with a keen emphasis on performance-oriented marketing. This agency expertly combines analytics, insights, and creativity to craft high-impact campaigns that resonate with audiences across various channels. Key to Mindshare's proficiency is their adept handling of media planning, purchasing, and optimisation, which aids bra

ClickSlice logo
ClickSlice
Independent·London·11-50 Employees

ClickSlice, a customised SEO agency headquartered in London, is renowned for its specialisation in propelling ecommerce growth. The unique selling point of ClickSlice lies in its integrated digital marketing strategy, merging expert SEO, personalised PPC services, and digital PR, all aimed at skyrocketing sales and optimising profits for ecommerce brands. Promoting an ethos of transparency and acc

A8om logo
A8om
Independent·London·11-50 Employees

A8om is a London-based full-service digital marketing agency that specializes in SEO, PPC, brand identity, website development, and more. With a team of creative strategists and technical experts, they have helped businesses of all sizes, from startups to large enterprises, enhance their digital presence and drive revenue growth. Drawing from years of industry experience, A8om uses data-driven met

Axcess Web logo
Axcess Web
Independent·London·2-10 Employees

Axcess Web is one of London's top digital marketing agencies, known for its effective approach and great results. With over 7 years of experience, they create customised strategies that help businesses grow. They prioritise transparency, innovation, and customer satisfaction, consistently surpassing expectations. Their team of over 100 experts excels in the latest techniques in SEO, PPC, social me

Key Element logo
Key Element
Independent·London·2-10 Employees

As a premier digital marketing agency rooted in London and Essex, Key Element differentiates itself through its dedicated strategic partnership with clients. Offering an extensive range of data-informed and user-focused digital marketing solutions, Key Element stands out in the industry. Their expertise lies in crafting top-notch marketing campaigns that boost online visibility and transform websi

Mobikasa logo
Mobikasa
Independent·London·51-200 Employees

As a powerhouse of digital strategy, Mobikasa is composed of an assorted mix of strategists, creators, developers, scribes, directors, and producers, united by a cutting-edge philosophy. This multifaceted team collaboratively engineers pioneering digital solutions that resonate with global audiences. With an industry tenure exceeding a decade, Mobikasa's designs, underpinned by scientific insight,

Galexia Creative Agency logo
Galexia Creative Agency
Independent·London·2-10 Employees

Galexia Creative Agency, a creative hub, specialises in fostering the growth of start-ups. Our services span from customised WordPress website development to managing social media and optimising for SEO, all under the umbrella of superior project management. This not only eases the burden of running a start-up but also ensures its growth. At Galexia, our distinctive method concentrates on nurturin

The One Stop Marketing logo
The One Stop Marketing
Independent·London·2-10 Employees

The One Stop Marketing Ltd, a premier digital marketing agency situated in London, UK, is renowned for its distinct focus on augmenting brands' online footprint. Leveraging data-driven approaches, they enhance visibility and elevate market value. Providing a diverse array of digital marketing solutions, The One Stop Marketing Ltd guarantees personalised strategies that effectively amplify business

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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.