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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 121-144 of 173 seo agencies in LondonAll SEO agencies
Brandnation logo
Brandnation
Independent·London·11-50 Employees

Brandnation, a London-based dynamic marketing and communications agency, stands out due to its unique "Creativity. Multiplied." ethos. This innovative approach is centred on enhancing brand communications via efficient channel integration. Offering an all-inclusive 360-degree campaign strategy across PR, Social Media, Influencer, Content, and Performance Marketing, Brandnation excels in the UK mar

Ayima logo
Ayima
Network·London·51-200 Employees

Headquartered in the UK and North America, Ayima is a globally recognised digital search agency, holding multiple awards and known for its partnerships with several major brands worldwide. With a proven track record in delivering tangible results and robust ROI for its clientele, Ayima's strength is found in its blend of industry expertise and pioneering technology. This unique blend has earned it

Flycast Media logo
Flycast Media
Independent·London·11-50 Employees

Flycast Media, a UK-based digital marketing firm, has carved a niche in the financial sector with a special focus on asset management firms, fintech organisations, and hedge funds. With an impressive track record spanning 20 years, Flycast distinguishes itself by delivering bespoke marketing solutions, underpinned by financial PR, financial service marketing, and financial services SEO. The agency

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

Burst Digital, a premier branding and marketing agency, has its operational bases in the renowned cities of London, New York, and San Francisco. This distinguished agency is distinguished by its team of mavericks and digital creatives who are committed to igniting brands with a surge of excitement via impactful visual branding, cutting-edge web design, and precise digital marketing. Burst Digital'

NOVOS logo
NOVOS
Specialist·London·11-50 Employees

Renowned as the UK's premier eCommerce SEO agency, NOVOS proudly holds the title of 2023's Global eCommerce Agency of the Year. Standing out from the crowd of other SEO agencies, NOVOS harnesses the power of strategic planning and data-driven decisions as its operational backbone. Its prowess in eCommerce is unparalleled, setting NOVOS apart as a sector leader. NOVOS' unique edge allows it to deli

Digitas logo
Digitas
Network·London·501-1000 Employees

Digitas, a London-based agency, specialises in a comprehensive suite of digital marketing solutions, concentrating on forging impactful relationships via inventive campaigns and platforms. Their core services encompass campaign creation, app development, and digital strategy, as illustrated by projects such as the OREO Press Play campaign and the Official Glastonbury 2022 App. Digitas' distinctive

Lilo Web Design logo
Lilo Web Design
Independent·London·11-50 Employees

Lilo, a London-based full-service web design and development agency, offers an extensive array of services spanning over two decades. Specialising in bespoke web design, eCommerce solutions on renowned platforms such as Magento and Shopify, and personalised .NET systems, Lilo enhances online user experiences and visibility with strategic SEO expertise. Recognised across various industries, Lilo's

ID Studio logo
ID Studio
Independent·London·11-50 Employees

ID Studio is a London-based innovative web design agency renowned for creating visually striking brands and websites optimised for conversions. Our unique attribute lies in our proficient in-house team of brand specialists, web designers, and developers, who fuse artistic creativity with strategic acumen to provide unparalleled digital experiences. Our all-encompassing services extend from imagina

Builtvisible logo
Builtvisible
Specialist·London·51-200 Employees

Builtvisible, a leading digital marketing firm located in the heart of London, prides itself on forging significant connections between individuals, communities, and brands. By leveraging strategic data, SEO, and content, we offer dynamic organic strategies that make an immediate impact. Renowned for executing campaigns with a high return on investment focus, Builtvisible is also instrumental in d

Incisive Edge logo
Incisive Edge
Independent·London·11-50 Employees

Based in London, Incisive Edge is a growth-focused marketing agency specialising in B2B technology and SaaS. They provide a strategic blend of inbound marketing, content creation, marketing automation, and demand generation to help clients-from startups to global enterprises-accelerate pipeline and ROI. By focusing on measurable outcomes and data-driven insights, Incisive Edge empowers organisatio

The Game Marketer logo
The Game Marketer
Specialist·London·11-50 Employees

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 logo
PHD
Network·London·1000+ Employees

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

Manning Gottlieb OMD logo
Manning Gottlieb OMD
Network·London·201-500 Employees

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 logo
Sister London
Independent·London·11-50 Employees

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 logo
Empower Agency
Independent·London·11-50 Employees

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

OnBrand logo
OnBrand
Independent·London·11-50 Employees

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

Croud logo
Croud
Network·London·201-500 Employees

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 logo
Figment Agency
Independent·London·11-50 Employees

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 logo
Mediahub
Network·London·1000+ Employees

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 logo
Ink Digital
Independent·London·2-10 Employees

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

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

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 logo
Lightflows
Independent·London·11-50 Employees

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 Marketing logo
CEEK Marketing
Independent·London·11-50 Employees

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 logo
Articulate Marketing
Independent·London·11-50 Employees

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

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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.