828 agencies indexed·Latest entry: 4 June 2026
Home/Services/SEO/in London
SEO in London · 158 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
  • 158 UK agencies offering seo in London
  • Part of the SEO service set
  • Indexed in London
  • Reviewed 17 May 2026
Showing 73-96 of 158 seo agencies in LondonAll SEO agencies
cremarc logo
cremarc
Independent·London·11-50 Employees

Based in the heart of London, Cremarc is a premier B2B digital marketing agency with a primary focus on the technology industry. Renowned for their distinctive blend of strategic planning, innovative thinking, and data-inspired insights, Cremarc delivers powerful marketing solutions to help tech businesses rise above their competitors and optimise their return on investment. By employing cutting-e

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

Cude Design, a Surrey-based strategic and creative web design agency in the UK, distinguishes itself through its UX-focused web design and development methodology. Their unique approach guarantees enhanced user conversion and engagement for clients across diverse sectors. Leveraging their expertise from launching and successfully exiting their own eCommerce business, Cude Design crafts efficient e

Good Signals logo
Good Signals
Independent·London·2-10 Employees

Good Signals, a London-based digital marketing agency, specialises in boosting global brand visibility on Google, optimising website conversions using A/B testing, and securing brand exposure on pertinent websites and top-tier publications. Our unique approach prioritises long-term, sustainable growth over fleeting successes. Our proprietary Find Your Way® methodology focuses on crafting bespoke s

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

Catch, a London-based digital agency, is recognised for its proficiency in crafting superior digital experience platforms. This standout agency specialises in an all-encompassing range of services, including digital strategy, experience design, technology, and performance optimisation. Emphasising its dedication to accessibility and inclusion, Catch boasts team members such as Ann Pilbeam, who ard

SAGE Marketing logo
SAGE Marketing
Independent·London·11-50 Employees·Verified

SAGE Marketing provides global B2B marketing and brand management services to global startup companies. We are your CMO as a Service.  From converting customer needs into business opportunities to engaging people on-line, off-line, and face-to-face, SAGE tailors the right marketing mix to your stage, budget, and needs. We will scale your brand and business to the next level. SAGE is home to experienced team of marketers, strategists, creatives, and tech enthusiasts who are leading startups to business success! Additionally, we are a HubSpot Diamond Partner, we help many startup and established companies to maximize their marketing & sales impact with HubSpot CRM.

Re:signal logo
Re:signal
Specialist·London·11-50 Employees·Verified

Re:signal is a premier digital marketing agency headquartered in the UK, renowned for its expertise in ecommerce SEO. With a history of driving marked organic revenue growth for global brands, such as ASICS and FatFace, Re:signal firmly stands as a trailblazer in the field. Their entirely remote team crafts bespoke SEO strategies for clients across the UK, US, and Europe, cementing their leadershi

CB Digital Marketing logo
CB Digital Marketing
Independent·London·11-50 Employees

CB Digital is an all-encompassing digital marketing agency headquartered in London, known for its results-oriented, strategic approach. Our agency has secured superior Google rankings for hotly contested keywords by delivering personalised marketing solutions that cater to unique business requirements. CB Digital's open and cooperative methodologies empower clients with a thorough understanding of

Sapience Communications logo
Sapience Communications
Independent·London·11-50 Employees

Situated in the heart of London, Sapience Communications stands as a leading communication agency. Offering an extensive array of services such as B2B lead generation, crisis communication, and digital marketing, it caters to a broad spectrum of industries, from fintech and healthcare to sustainability. Their distinctive methodology merges strategic acumen with data-driven insights to formulate cu

Madano logo
Madano
Independent·London·11-50 Employees

Madano, a UK-based communications consultancy, distinguishes itself within the science, technology, and engineering sectors by assisting clients in crafting strategic narratives that shape the future. Our focus on these niche sectors enables us to effectively influence vital stakeholders. We uphold a solid dedication to evidence-based strategies, utilising our creative, digital, and analytical com

Blue Train Marketing logo
Blue Train Marketing
Independent·London·11-50 Employees

Blue Train Marketing, a UK-based marketing agency, excels in the fintech and payments sector. Our distinguishing factor lies in our commitment to bolster both domestic and global clients' business growth through all-encompassing services. These include branding, content production, and lead acquisition. By integrating strategic storytelling with potent marketing strategies, Blue Train Marketing en

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

Based in Hertfordshire, UK, Link Digital is a premier digital marketing agency specialising in delivering cost-effective, bespoke digital marketing solutions. Catering primarily to small and medium-sized enterprises, our diverse range of services encompass web design, SEO, PPC, and social media marketing. Our unique approach sets us apart, with a dedication to creating tailored strategies that dri

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

NBT is a London-based growth-centric agency, with a global footprint stretching across Turkey, the UAE, Germany, Netherlands and Florida. With a unique ecosystem that bolsters business expansion through bespoke services such as growth strategy implementation and digital marketing, NBT sets itself apart. Our signature offerings like the Growth Academy and NBT Venture Studio equip businesses with th

Propeller logo
Propeller
Independent·London·11-50 Employees

For over twenty years, Propeller has specialised in aiding clients to overcome the critical obstacles that hinder their success and disrupt their peace of mind. Propeller takes pride in partnering with renowned brands such as Twinnings, Young's, Kellogg's, Aman, Boy Smells, and several others. Functioning as an integral part of your in-house team, Propeller delivers vital strategic advice, technic

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

Wilderness Agency, a vibrant ensemble of dedicated social strategists, adept content developers, and media experts, is a hub of innovation and creativity. Our youthful and inventive team thrives on inspiration and creative energy. Wilderness Agency specialises in several fundamental areas: - **Strategy**: Powered by profound insights, we cultivate and enhance digital communities, producing sign

Social Chameleon logo
Social Chameleon
Independent·London·11-50 Employees

Operating from the heart of London and Sydney, Social Chameleon is a leading digital marketing agency renowned for its innovative Search-First Social Media® approach. Specialising in the amalgamation of social media strategies and SEO, they excel in boosting brand visibility and fostering engagement. Their extensive range of services, featuring content generation, Google Ads, and influencer market

NU Creative logo
NU Creative
Independent·London·11-50 Employees

NU Creative, a London-based strategic branding and design agency, is renowned for its all-encompassing approach. They skilfully blend strategy, creativity, and technology to construct bespoke brand narratives that truly engage the intended audience. NU Creative specialises in providing enduring digital solutions and pioneering marketing campaigns, guaranteeing each brand they collaborate with is v

GA Agency logo
GA Agency
Independent·London·51-200 Employees

Based in the heart of Soho, London, GA Agency stands as a distinguished digital marketing firm, dedicated to delivering top-tier global digital solutions with a distinctly localised approach. Our expertise spans across SEO consultation, paid media management, and crafting bespoke eCommerce strategies, uniquely designed to synchronise with the ever-changing trends of user behaviour. Our diverse tea

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

Distinctly logo
Distinctly
Independent·London·11-50 Employees·Verified

Distinctly, a leading digital marketing agency based in Old Street, London, boasting more than a decade of industry experience. This agency sets itself apart by integrating creative ingenuity with data-driven analysis, fuelling significant growth for brands with ambition.

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

Editor's note

AgencyIndex tracks 158 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.