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.

The Game Marketer, an expert marketing agency rooted in Wimbledon, London, stands out with its comprehensive knowledge of the gaming sector. Their unique selling point is a team of passionate gaming enthusiasts turned marketers, guaranteeing that each promotional campaign strongly echoes within the gaming community. Excelling in video game marketing, advertising, and creative services, they levera

PHD Media, a London-based agency, specialises in strategic communications and media planning services. They excel in media purchasing, digital marketing, and data analytics, all geared towards helping brands connect efficiently with their desired audiences. PHD Media's unique selling point is their innovative use of data-driven insights to craft powerful campaigns. They predominantly serve sectors

Based in London, MG OMD is a distinguished agency renowned for its innovative and integrated media campaigns, specifically designed to yield real impact across all communication facets. The agency specialises in planning and securing advertising spaces, bolstered by unrivaled expertise in sculpting media strategies that resonate with diverse audiences. Setting itself apart, MG OMD boasts an award-

Sister London is a London-based comprehensive marketing agency, renowned for its unique fusion of strategic insight and engaging content to craft campaigns that defy conventions. With a specialisation in digital marketing, PR, events, and design, Sister London injects a creative and innovative approach into the spheres of destination, food, and lifestyle brands on a worldwide scale.

Empower Agency, a London-based strategic digital partner, excels in fostering causes that generate positive influence. Recognised as a certified B Corp, Empower distinguishes itself by amalgamating research, insight, and strategy to devise innovative and persuasive digital campaigns that champion significant transformation. They concentrate on empowering teams and captivating audiences by offering

Based in Hertfordshire, OnBrand is a comprehensive marketing agency with a specialism in business expansion. What distinguishes OnBrand is its unwavering commitment to aid companies at critical junctures, whether it's facilitating small businesses' shift to e-commerce or empowering larger firms to improve their customer journey with digital and audio marketing strategies. Boasting a wide range of

Centrally located in London, Croud is a comprehensive media agency that also operates from additional bases in Shrewsbury, New York, Atlanta, and Dubai. Croud distinguishes itself with a robust commitment to performance-oriented expansion and innovation, capitalising on a profound legacy in analytics, strategic planning, and strategy to ensure enduring success for aspirational worldwide brands. Th

Figment Agency, a celebrated SEO agency residing in London, specialises in crafting streamlined and potent SEO strategies. With a distinctive focus on the healthcare and professional services sectors, Figment is dedicated to helping businesses attain consistent growth by linking them with their perfect clients via online channels. Their bespoke strategy, which incorporates their trademarked Search

Mediahub, a London-based agency, specialises in strategic media planning and buying, merging human insight with data-led strategies. Their core services encompass the creation of media strategies, cross-channel media procurement, and bespoke advertising solutions, customised to align with each client's unique requirements. What sets Mediahub apart is their emphasis on integrating human expertise w

Ink Digital, a versatile SEO and digital marketing agency, is located in the heart of London. Uniquely, we provide customised strategies for every client, guaranteeing optimal return on investment via personalised SEO, PPC, web design, digital PR campaigns, among others. Our strength lies in our commitment to incorporating data-driven insights and current industry trends, ensuring we deliver excep

Our London-based, award-winning agency is a leading expert in bespoke web design. We specialise in creating innovative, mobile-optimised websites, setting ourselves apart with our commitment to engaging user experiences and customised eCommerce solutions. We utilise Swiss-style design to cater to our clients' unique requirements. Well-regarded for a wide array of digital marketing services, we shi

Lightflows, a premier digital agency operating from Guildford, Surrey and Southbank, London, is distinguished for their proficiency in web design, development, and bespoke app creation. As a frontrunner in delivering customised digital solutions, Lightflows caters to both well-established enterprises and funded startups, driving them towards digital triumph. Their dedication towards harnessing con

CEEK, a London-based digital marketing firm, stands out in the crowded market with its unique OCMX methodology and E-Matrix™ strategy. Specialising in bespoke marketing insights and strategies, CEEK significantly enhances the ROI for every client. With a strong emphasis on innovation and data-led decisions, CEEK provides a holistic range of services: from social media and SEO marketing, to paid me

Articulate Marketing, a top-tier digital marketing agency headquartered in the UK, excels in delivering specialised services to B2B technology firms. Their distinctive feature is their exclusive Difference Engine® framework, honed to champion brand differentiation and strategic marketing to fuel growth and cultivate superior quality leads. As a certified HubSpot Diamond Partner, Articulate Marketi

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 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, 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, 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,

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, 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, 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

Based in London and Cheltenham, Click Intelligence is a digital marketing agency that thrives on delivering results. What sets us apart is our data-driven methodology, offering customised strategic search marketing solutions to cater to the distinctive requirements of each client. Our extensive suite of services spans from SEO and PPC management to content services and link building. At Click Inte

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, 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
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.
Boutique / freelance £500-3,000 · Mid-market £1,500-7,500 · Network £7,500-20,000+. One-off audits £1,500-10,000.
1-3mo technical foundations · 3-6mo ranking and traffic gains · 6-12mo+ revenue compounding.
- · 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
Other services in London.
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.