Marketing Agency Companies Using Yoast SEO in the UK: 1,859 Active Firms (2026)
Marketing agencies running an SEO plugin use website optimisation tooling alongside campaign services for UK clients.
Within agency operating models, this plugin sits closest to content, technical SEO and conversion-rate workflows rather than media buying alone. Adoption tends to signal a CMS-led delivery model, retained client relationships and enough delivery process to maintain page templates, metadata, redirects and reporting across multiple business sites. The buying centre is usually the search or content team, with input from web developers and account managers where clients expect regular optimisation work. Engagements are more often SME and mid-market retainers than one-off audits, though some users will be small consultancies with a lighter stack.
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Across the UK, 1,859 marketing agencies are running this SEO plugin. Its detected category share within the agency SEO-plugin stack is 77.4%, giving it the highest share among comparable tools in this sector rather than a niche position. Regional skew is London-weighted, with 27.9% of the cohort registered there, followed by the South East at 16.0%, the North West at 11.1%, the South West at 8.3% and the East of England at 8.1%. Reported employment totals 3,288 people, which points to a user base dominated by small agency teams even before allowing for firms that disclose little operational detail.
Agency use of SEO and analytics tooling usually carries fewer licensing questions than financial or health-sector software, but it still sits inside marketing-law controls. The ICO regulates personal data use and PECR for direct marketing, while Ofcom covers misuse of public electronic communications networks. The CMA and trading standards can become relevant where campaign claims or online selling practices drift into unfair-trading territory, and the ASA applies the CAP Code to advertisers, agencies and media owners. For direct marketing specialists, the DMA code also matters where membership makes it mandatory; in practice, procurement checks tend to focus on consent, tracking, cookie governance and client-data handling.
Adoption appears to be less about experimentation and more about default agency plumbing. The pressure is likely to come from margin and governance rather than novelty: agencies need repeatable on-page checks, clearer audit trails for client sites and fewer hand-offs between content, development and reporting teams. Some users will stay with familiar plugin-led workflows because they are easy to explain to SME clients; others may shift more work into bundled CMS, hosting and analytics packages. The scarcer group is likely to be agencies that turn the stack into a disciplined operating model rather than another collection of point tools.
Adoption by company size
Adoption of Yoast SEO rises with company size across the trading UK marketing agency companies in this cohort. 2.3% of the 54,246 companies with under 10 employees run Yoast SEO (1,244 detected). 29.7% of the 1,903 companies with 10–50 employees run Yoast SEO (566 detected). 32.2% of the 146 companies with over 50 employees run Yoast SEO (47 detected). That is a 29.9% gap between the over 50 employees and under 10 employees bands.
1,859
Active firms
2026
77.4%
Of detected SEO share
UK marketing agency
6
Median headcount
Filed accounts
3,719
Verified contacts
Across this cohort
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Key facts
About 3% of the trading cohort reports turnover above £5M (67 of 1,859 firms) — the rest sits below that revenue band.
4% of the cohort was incorporated since 2022 (91 firms), so a sizeable share is in its first few filing cycles.
Within marketing agencies with a detectable SEO system, this plugin accounts for 77.4% (1,859) of 2,402 detected installs; the next-largest detectable system is 12.6% (302).
London accounts for 27.9% (519) of the cohort, followed by the South East at 16.0% (298) and the North West at 11.1% (206).
Technology use skews towards measurement: 55.7% (1,035) also show an analytics tag and 44.5% (827) show tag-management tooling.
Direct-marketing campaigns bring ICO and PECR obligations, while Ofcom, the CMA, trading standards and the ASA cover network misuse, unfair-trading rules and CAP Code enforcement.
UK ad spend increased by 10.4% in 2024 to £42.6 billion; online formats grew 13.2%, and search reached £16.9 billion.
SEO market share among UK Marketing Agency
Share of the 2,402 UK Marketing Agency with a detectable system. As of June 2026.
What else do Yoast SEO-running Marketing Agency run?
Share of the 1,859 Yoast SEO-running UK companies where each technology was also detected. As of June 2026.
Where Yoast SEO Marketing Agency are, and how healthy they look
By region
By registered-office region; companies without a regional match count toward Rest of UK.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
6
Median headcount
£468.6K
Median UK turnover
3.6%
Above £5M turnover
91
Incorporated since 2022
3,719 verified decision-maker contacts
across these 1,859 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK Marketing Agency using Yoast SEO
Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.
Financial sub-scores
Computed from 5 filingsProvides creative and media agency services including brand strategy, advertising campaigns, content production, SEO and CRO, website and ecommerce design, media planning and buying, paid search and…
Serves B2B marketing teams, brand owners and growth-focused organisations, including ecommerce, retail, consumer brands and charities seeking creative, media and digital agency support.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation, digital PR, paid media management, content strategy, technical SEO and analytics. Plans and runs campaigns across search,…
Serves B2B and consumer-facing brands, particularly marketing teams in travel, ecommerce, charities and non-profits, finance and insurance, health and beauty, and automotive sectors.
Financial Health
StableStable · -66% CAGR over 4y
Location
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Computed from 3 filingsProvides digital marketing services for retailers and brands, including paid search advertising, search engine optimisation, and affiliate marketing. Develops and operates ecommerce marketing…
Serves large retailers and consumer brands on a B2B basis, particularly ecommerce and online retail teams seeking performance marketing support. Targets major UK and European retail businesses, with…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 2y
Location
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Computed from 5 filingsProvides digital marketing and technology services for brands and retailers, including paid search, paid social, SEO, influencer marketing, marketing automation, and data and technology solutions,…
Sells to brands and retailers needing digital marketing and technology support, particularly multi-market consumer, retail, beauty, fashion, sports and electronics businesses across Europe.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 6y
Location
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Computed from 5 filingsProvides digital marketing services including strategy development, website design and development, search engine optimisation, conversion rate optimisation, and paid media campaign management to…
Sells to businesses seeking digital marketing support, including brands of various sizes that want lead generation, stronger online visibility and better conversion performance. Targets B2B clients…
Financial Health
HealthyHealthy · -6% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation (SEO), paid advertising management, social media marketing, marketing automation, and website development. Also offers digital…
Serves ambitious businesses and B2B organisations, from SMEs to larger corporates, including manufacturers, food producers, technology firms and professional services seeking a London-based marketing…
Financial Health
StableStable · Hiring · 19% CAGR over 4y
Location
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Computed from 5 filingsProvides digital performance marketing services including paid search, paid social, programmatic advertising, SEO, digital PR, influencer marketing, and creative strategy. Uses data analysis,…
Serves marketing and growth teams at leading brands and start-ups, particularly consumer retail, ecommerce, hospitality, health and lifestyle businesses seeking agency support.
Financial Health
StrongStrong · Growing, Hiring · 35% CAGR over 4y
Location
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Computed from 3 filingsProvides media planning and buying and digital marketing services, including paid search, paid social, display and programmatic advertising, SEO, analytics and measurement, and multichannel campaigns…
Serves B2B and B2C brands seeking media-led growth, including challenger banks, fintech/payment firms, payroll providers, luxury retail, drinks brands, ecommerce retailers and consumer product…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 2y
Location
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Computed from 5 filingsProvides digital marketing and performance media services including SEO, paid search and social advertising, display and programmatic media buying, influencer marketing, data analytics, and web…
Serves marketing teams and growth-focused organisations, including B2B brands and companies in sectors such as fintech, property and housing, and pharmaceuticals, with an international client base.
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing and brand services including brand strategy, creative campaigns, paid media advertising, search engine optimisation, digital PR and content marketing. Also designs and…
Serves B2B organisations and marketing leaders, especially in SaaS, clean energy, ecommerce, education, healthcare, HR software and professional services.
Financial Health
StrongStrong · Growing · 1% CAGR over 4y
Location
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Computed from 5 filingsProvides WordPress web design and development services, including UX/UI design, custom platform and plugin development, CMS migration, API integrations and dedicated hosting. Also delivers SEO…
Serves enterprise and growth-focused organisations, typically marketing, digital and product teams needing WordPress website, platform and SEO support, including firms with complex, multilingual or…
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
Location
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Computed from 4 filingsProvides digital marketing services including search engine optimisation, pay‑per‑click advertising, paid social media campaigns, and conversion rate optimisation. Also offers digital marketing…
Sells to businesses seeking digital growth, including eCommerce brands and firms in legal, insurance, hospitality, food and beverage, healthcare, and construction. Also serves professional audiences…
Financial Health
HealthyHealthy · -7% CAGR over 3y
Location
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Computed from 5 filingsProvides digital marketing and creative services for B2B brands, including marketing strategy, account-based and inbound marketing, branding, content creation, SEO, social and performance media…
Serves B2B brands and growth-focused companies, especially sales and marketing teams targeting prospects and pipeline growth across sectors such as facilities, logistics and industrial technology.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including multi-channel strategy, paid media management (PPC, Google Ads, social and marketplace ads), search engine optimisation, content marketing, data and…
Serves B2B organisations needing outsourced performance marketing support, including online businesses, ecommerce brands and companies seeking long-term agency partnerships, with emphasis on Bristol…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 5y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation (SEO), pay‑per‑click advertising, and paid social media campaigns. Designs and develops websites and delivers multi‑channel…
Serves B2B clients, including brand and marketing teams at UK and international consumer, retail, automotive and home/interiors businesses seeking agency support for digital growth.
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 4y
Location
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Computed from 3 filingsProvides digital marketing services including search engine optimisation, paid advertising management, website design and development, content marketing, social media, email marketing, digital PR,…
Serves businesses with in-house marketing teams seeking external digital marketing support, training and performance growth across SEO, paid advertising, content, social, email and web channels.
Financial Health
StrongStrong · Hiring · 22% CAGR over 2y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation, paid media management, digital PR, user experience optimisation, and data‑driven marketing strategy. Works with e‑commerce…
Serves marketing leaders at fast-growing e-commerce businesses and established consumer brands, particularly in retail, travel, care, lifestyle and home furnishings.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
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Computed from 4 filingsProvides digital marketing services including search engine optimisation (SEO), paid media management such as Google Ads, digital PR and outreach campaigns, and marketing strategy consulting to…
Serves B2B and consumer-facing organisations with in-house marketing teams, including travel, leisure, telecoms, ecommerce and membership brands seeking growth marketing support.
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 5y
Location
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Computed from 5 filingsProvides digital marketing and technology services for brands, including AI transformation, data and technology consulting, customer experience design, e‑commerce development, media and brand…
Serves enterprise and global brand marketing, digital and technology teams, especially in banking, financial services, insurance, consumer packaged goods, health, retail and commerce, and tech, media…
Financial Health
StrongStrong · Hiring · 15% CAGR over 5y
Location
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Computed from 5 filingsProvides public relations and strategic communications services for B2B and corporate organisations, including media relations, crisis communications, digital PR, influencer marketing, SEO, social…
Serves B2B and corporate clients, including marketing and communications teams in education, ESG and sustainability, healthcare, legal, financial services, manufacturing, professional services,…
Financial Health
StrongStrong · Growing, Hiring · 28% CAGR over 5y
Location
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Computed from 5 filingsProvides digital advertising and performance marketing services, including pay‑per‑click campaign management, paid search, display and social media advertising, SEO, content marketing, and…
Serves B2B clients ranging from small businesses outside London to national companies and global organisations, typically marketing leaders or business owners seeking an external performance…
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Computed from 4 filingsProvides B2B marketing and communications services including brand positioning, messaging development, public relations, content marketing, campaign strategy, analyst and media relations, sales…
Targets growth-focused B2B innovators and market disruptors, especially technology, SaaS, cybersecurity, fintech and telecoms brands, with buyers including CEOs, CMOs and sales/marketing leaders.
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 3y
Location
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Computed from 3 filingsProvides search engine optimisation, search marketing and data analytics services. Offers technical SEO audits, content and digital PR support, AI search strategy, analytics reporting, and training…
Sells to businesses, particularly ambitious ecommerce brands, growing SMEs, and larger organisations in publishing, healthcare and pharmaceuticals seeking specialist SEO, search marketing and data…
Financial Health
StableStable · Hiring · 33% CAGR over 2y
Location
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Computed from 5 filingsProvides creative, branding and media services including brand strategy, advertising campaign development, content production, SEO, website design, analytics, and paid media planning and buying…
Serves B2B marketing and growth teams at growth-focused businesses, particularly consumer-facing brands in retail, ecommerce, charity and FMCG sectors seeking agency support.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 5y
Location
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Computed from 5 filingsProvides digital marketing services including brand strategy, performance marketing, media planning and buying, SEO and search advertising. Also offers campaign creation, digital PR, video and…
Serves B2B clients, including large brands and businesses globally, that need support with growth objectives, lead generation, conversions, ecommerce, PR, influencer activity and digital customer…
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including strategy development, SEO, pay‑per‑click advertising, and social media marketing. Plans and manages online campaigns and lead‑generation activities for…
Serves B2B companies, healthcare organisations and international brands, working with businesses of varying sizes and internal marketing teams in London and abroad.
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation, digital PR and outreach, link building, and paid media management across Google Ads, Microsoft Ads, and social platforms,…
Serves B2B clients, from medium-sized businesses to large multinational brands, including ecommerce teams and agencies seeking white-label SEO, PPC or digital PR support.
Financial Health
StrongStrong · Growing, Hiring · 21% CAGR over 4y
Location
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Computed from 4 filingsProvides digital marketing services including social media advertising, pay‑per‑click advertising, search engine optimisation, digital PR, website design and development, content creation, email…
Serves UK SMEs and growing businesses, including eCommerce and D2C brands in fashion, jewellery, food and drink, health and beauty, pet care, FMCG, home and garden, education, and professional…
Financial Health
HealthyHealthy · Growing · 2% CAGR over 3y
Location
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Computed from 5 filingsProvides digital marketing services focused on recruitment and talent attraction, including search engine optimisation for job listings, Google for Jobs integration, paid advertising campaigns,…
Targets talent acquisition and employer brand teams at large employers, recruitment agencies and specialist job boards across multiple industries, including organisations hiring volume or…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation, pay‑per‑click advertising management, paid social and display advertising, content marketing, digital PR, social media…
Serves businesses and brands needing digital marketing support, including retailers, hospitality groups and manufacturers, with buyers likely to be marketing teams or business leaders seeking growth,…
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing and media planning services for B2C and B2B clients, including media strategy, media buying, programmatic advertising, social and mobile campaigns, search marketing and…
Serves B2B and B2C organisations buying media and digital marketing support, particularly in leisure, tourism, retail, property, education, and technology and communications. Targets clients seeking…
Financial Health
StableStable · -66% CAGR over 4y
Location
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Computed from 5 filingsProvides website design and development and digital marketing services including SEO, pay‑per‑click advertising, social media advertising, email marketing, conversion rate optimisation, and ecommerce…
Sells to small and medium-sized businesses seeking web design and digital marketing support, especially growth-focused firms in fitness, hobbies, home and garden, and ecommerce. Serves both smaller…
Financial Health
StrongStrong · Growing, Hiring · 24% CAGR over 4y
Location
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Computed from 3 filingsProvides search engine optimisation services for ecommerce brands, including organic search strategy, technical SEO, content production and digital PR. Optimises product data and listings for…
Serves B2B ecommerce brands and online retailers, particularly established or global consumer brands with marketing and ecommerce teams focused on organic revenue growth.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
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Computed from 5 filingsOperates a group of marketing, branding and creative agencies serving luxury and lifestyle brands. Provides brand strategy, digital and ecommerce design, content production, PR, experiential events,…
Serves B2B clients in luxury, lifestyle and premium markets, including fashion, beauty, retail, hospitality, destinations and cultural organisations, from global brands to sector bodies operating…
Financial Health
StrongStrong · Growing, Hiring · 75% CAGR over 4y
Location
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Computed from 5 filingsProvides marketing and sales support for companies in the scientific, laboratory and life sciences sectors, including digital marketing, SEO, PPC, content creation, database building, market…
Sells to B2B organisations in the chemistry, life sciences, laboratory, medical and wider technical sectors, from organisations of all sizes to scientific businesses seeking support for sales,…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation (SEO), pay‑per‑click advertising management, social media advertising on platforms such as Meta and LinkedIn, and website and…
Serves startups and established businesses in the UK and Ireland, primarily owners and marketing teams seeking more traffic, leads and enquiries from online channels.
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including pay‑per‑click advertising, paid social media campaigns, search engine optimisation, and performance creative. Plans, manages and optimises online…
Sells to businesses seeking outsourced digital marketing, including e-commerce, telecoms, utilities and consumer brands. Targets marketing decision-makers that want PPC, paid social, SEO and creative…
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
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Computed from 5 filingsProvides media planning and buying across online and offline channels, including search engine optimisation, paid and organic search strategy, data analytics, and content strategy. Develops…
Serves brands and marketing teams, particularly in property and travel, including developers, shared ownership providers, airlines and other consumer-facing organisations.
Financial Health
HealthyHealthy · Hiring · 29% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including pay‑per‑click advertising management, search engine optimisation (SEO), and performance marketing strategy. Works with organisations to improve online…
Serves B2B and nonprofit organisations seeking PPC and SEO support, including changemaker brands, charities and purpose-led businesses. Targets organisations of all sizes with underperforming digital…
Financial Health
StrongStrong · Growing, Hiring · 25% CAGR over 4y
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Computed from 5 filingsProvides web design and development, digital marketing, and graphic design services. Activities include SEO, PPC, social media and email marketing, branding, packaging, catalogues, campaign creative,…
Serves businesses and brands needing external creative and marketing support, including product brands, ecommerce firms and service-based companies seeking web, digital marketing, branding,…
Financial Health
StrongStrong · Hiring · 17% CAGR over 4y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation, social media management, paid media advertising, influencer marketing, email marketing, content creation, and marketing…
Serves businesses and brands in consumer-facing sectors including food and beverage, health and beauty, fashion and retail, hospitality, travel, sport, real estate, charities, startups and…
Financial Health
StrongStrong · Growing, Hiring · 23% CAGR over 5y
Location
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Computed from 5 filingsProvides digital marketing services including search engine optimisation, Google Ads campaign management, keyword research, website architecture and conversion rate optimisation. Also offers link…
Serves businesses seeking digital customer acquisition, including lead-generation and ecommerce firms, plus ICO and blockchain projects. Targets business owners and marketing decision-makers wanting…
Financial Health
StrongStrong
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Computed from 5 filingsProvides digital marketing services including PPC advertising, search engine optimisation, social media management and content marketing, developing campaigns and strategies for sectors such as…
Sells to businesses seeking digital marketing support, particularly organisations in healthcare, technology, hospitality, travel and education. Targets companies wanting an agency to work closely…
Financial Health
StrongStrong · Growing, Hiring · 78% CAGR over 4y
Location
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Computed from 5 filingsProvides lead generation and digital marketing services, supplying qualified sales leads to businesses in sectors including solar, insulation, boilers, windows and doors, mortgages, and legal…
Serves B2B clients seeking customer leads, especially mortgage brokers and lenders, legal firms, and home improvement or energy providers in solar, insulation, windows and doors, boilers, ECO4 and…
Financial Health
StrongStrong · Growing, Hiring · 43% CAGR over 4y
Location
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Computed from 4 filingsProvides WordPress design and development services, including digital strategy, UX/UI design, website and WooCommerce development, SEO and paid media, data analytics, and ongoing support and…
Serves businesses and organisations needing WordPress and WooCommerce support, including hospitality and hotel groups, e-commerce retailers, recruitment firms, membership bodies, non-profits,…
Financial Health
StrongStrong · Growing, Hiring · 71% CAGR over 3y
Location
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Computed from 3 filingsProvides digital marketing and product development services for sports brands and personalities, including social media content creation and community management, campaign production, website and app…
Serves sports brands, athletes, sports personalities and fan-focused organisations, with case studies spanning betting content, fundraising platforms, charities and football-related campaigns.
Financial Health
StrongStrong · Hiring · 26% CAGR over 2y
Location
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Computed from 5 filingsProvides media planning and media buying services for brands, managing advertising campaigns across channels. Offers media strategy, campaign activation, paid search and social advertising, and…
Targets ambitious brand-side marketing teams and businesses across sectors and sizes, including FMCG brands, that invest in media campaigns and want an independent agency partner.
Financial Health
StrongStrong · Growing, Hiring · 46% CAGR over 4y
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Computed from 5 filingsProvides search engine marketing services, managing and optimising paid search advertising campaigns on platforms such as Google and Bing. Uses proprietary AI tools and analytics to audit accounts,…
Serves marketing and growth teams at global brands and high-growth companies, especially mature, high-spend advertisers in travel and ecommerce operating across multiple markets and languages.
Financial Health
StrongStrong
Location
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Computed from 5 filingsProvides marketing agency services including brand strategy, creative design, digital and social media marketing, SEO, campaign development, and event planning. Works with B2B and B2C clients to…
Serves B2B and B2C organisations, including multinational technology firms, FMCG start-ups and public-interest bodies, typically working with brand, marketing, communications and campaign teams…
Financial Health
StrongStrong · Hiring · 6% CAGR over 4y
Location
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Computed from 4 filingsProvides public relations and communications consultancy, including corporate and consumer PR, social media and influencer campaigns, digital marketing and SEO, public affairs support, ESG…
Serves startups, B2B and consumer-facing organisations in sustainability-led sectors, including climate, energy, oceans, food, circularity and the built environment.
Financial Health
StrongStrong · Growing, Hiring · 96% CAGR over 3y
Location
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Showing 50 of 1,859 — +1,809 more with verified decision-maker contacts, live data, and CRM sync.
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Showing 50 of 1,859 — +1,809 more with verified decision-maker contacts, live data, and CRM sync.
How Yoast SEO usage is detected
Company data
Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Detection
Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling. marketing agency companies are identified using Firmbase's semantic classification of company activity, built from filings, websites and registered SIC codes rather than SIC codes alone. The detected counts and share figures on this page are computed within that sector cohort, so "share" always means share of marketing agency companies with a detectable system — not of all UK companies.
Freshness
Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.
Yoast SEO is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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Frequently asked questions
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