Companies Using Yoast SEO in Cardiff: 668 Active Firms (2026)
Companies running SEO plugins in Cardiff use public websites to manage search metadata, content visibility and digital acquisition across the city region.
Search-optimisation plugins sit close to the marketing website rather than the core operating system, so adoption says more about acquisition discipline than deep software infrastructure. Yoast SEO users tend to be organisations with regular publishing, location pages, product or service landing pages, and a need to manage metadata without routing every change through developers. Buying centres are usually marketing, digital, web operations or an external agency, with finance becoming involved when sites support paid acquisition or higher-value enquiries. Engagements are typically modest: setup, template changes, analytics hand-offs, consent checks and periodic content audits, rather than large systems-integration programmes.
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Cardiff’s adoption base is mid-sized rather than national-platform scale: 668 actively trading companies running Yoast SEO sit in the city-region cohort. The employment footprint is not just microbusinesses; reported headcount across the cohort totals 5,433 people. Sector mix leans towards local service and built-environment demand, with field services and trades, construction, manufacturing, travel and hospitality, and wholesale and distribution all visible among adopters. That pattern fits a market where search visibility often supports enquiry generation, quote requests and location-led content, rather than pure software-led acquisition.
Site marketing sits mainly under horizontal rules rather than a dedicated licence for SEO plugin use. The ICO’s PECR guidance requires websites to tell users about cookies, explain what they do and why, and get consent before setting non-essential cookies or similar technologies. Where analytics or cookie identifiers become personal data, UK GDPR and Data Protection Act duties also apply. Landing pages, affiliate material, paid search copy and social posts can fall within ASA oversight under the CAP Advertising Codes when they are marketing communications.
Adoption appears likely to stay tied to the installed base of content-managed websites rather than a separate procurement cycle. Migration pressure tends to come less from the plugin itself than from shifts in consent banners, analytics attribution and search-result formats. The Cardiff cohort includes many owner-managed and mid-market adopters, so churn between agency stacks is plausible but not automatic. Firms with larger marketing teams may pull website optimisation, consent and analytics governance under fewer suppliers, while smaller businesses are more likely to keep familiar plugins until a rebuild or agency change forces a review.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
Adoption by company size
Adoption of Yoast SEO rises with company size across the trading companies in this cohort. 1.7% of the 25,287 companies with under 10 employees run Yoast SEO (424 detected). 14.3% of the 1,326 companies with 10–50 employees run Yoast SEO (189 detected). 25.7% of the 167 companies with over 50 employees run Yoast SEO (43 detected). That is a 24% gap between the over 50 employees and under 10 employees bands.
668
Active firms
2026
38
Above £5M turnover
Trading firms
7
Median headcount
Filed accounts
1,388
Verified directors
Across this cohort
Top companies using Yoast SEO in Cardiff
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.
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Computed from 3 filingsProvides WordPress website design and development services, including UX/UI design, user research, website audits, platform migrations, maintenance, and web security. Builds and manages WordPress…
Serves digital marketing teams in regulated B2B and public-sector organisations, especially financial services, legal and professional services, healthcare, government and publicly funded bodies…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 2y
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Computed from 3 filingsProvides residential estate agency services including property sales, lettings and property management. Markets homes, arranges valuations and viewings, supports buyers and sellers through…
Serves home buyers, property sellers, renters, student tenants and residential landlords in Cardiff, Penarth, Barry, Caerphilly and Bristol.
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 2y
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Computed from 5 filingsProvides digital design, web and software development, and digital marketing services, creating and managing websites, digital products, and online campaigns for organisations using a user‑centred…
Serves organisations rather than consumers, targeting business or nonprofit clients that need external digital agency support, including those requiring bilingual Welsh/English communications.
Financial Health
StrongStrong
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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
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Computed from 3 filingsProvides legal services focused on personal injury claims, representing individuals in cases such as workplace accidents, road traffic accidents, medical negligence, asbestos-related diseases, public…
Serves individuals in England and Wales seeking compensation after personal injuries, workplace and road accidents, medical negligence, asbestos disease, criminal injuries or accidents in public…
Financial Health
HealthyHealthy · Growing, Hiring · 14% CAGR over 2y
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Computed from 5 filingsProvides laboratory and point‑of‑care testing for drugs, alcohol, DNA and prescription medications, including hair, blood and nail analysis. Supplies analytical testing and expert witness reporting…
Serves family law and social work professionals, employers, government bodies, education providers, individuals and safety-sensitive sectors such as aviation, construction, maritime, transport,…
Financial Health
StrongStrong · Growing, Hiring · 34% CAGR over 5y
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Computed from 4 filingsProvides work‑based learning programmes including apprenticeships, vocational training courses and youth employment schemes. Delivers commercial training, bootcamps and consultancy for employers,…
Serves a mix of individuals and organisations: 16-19-year-old learners, apprenticeship candidates, employees, and employers in Wales and England seeking workforce development, plus commercial…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 10% CAGR over 3y
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Computed from 5 filingsProvides laboratory and point‑of‑care drug and alcohol testing, including hair, blood and nail analysis. Also conducts DNA, steroid and prescription medication testing, and supplies expert witness…
Serves family law firms, social work teams, employers, public-sector bodies, individuals, and regulated sectors including aviation, construction, housing, finance, maritime, security, sport,…
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
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Computed from 5 filingsProvides website design and development, web applications, and ongoing website support. Delivers digital marketing services including PPC, paid social, SEO and campaign management, alongside…
Targets B2B organisations in health, leisure and tourism, and sport, including care providers, sports bodies, tourism operators and leisure businesses seeking agency support.
Financial Health
HealthyHealthy · -3% CAGR over 4y
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Computed from 3 filingsOperates an independent school providing preschool, primary, secondary and sixth form education. Delivers classroom teaching, extracurricular activities, pastoral support and additional learning…
Sells to parents seeking private, non-selective education for children from preschool to sixth form, including families needing additional learning support and international pupils considering…
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StrongStrong · Growing · 4% CAGR over 2y
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Computed from 4 filingsInstalls energy‑efficiency and renewable energy systems for residential and commercial properties, including solar panels, air source heat pumps, boilers and insulation. Provides retrofit…
Serves UK homeowners, grant-eligible households, commercial businesses, and public-sector or community clients seeking energy-efficiency upgrades.
Financial Health
StrongStrong · Hiring · 22% CAGR over 3y
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Computed from 3 filingsProvides managed IT services for businesses, including IT support, infrastructure management, cybersecurity assessments, cloud services, system upgrades, and technology projects. Also supplies and…
Serves businesses in Cardiff and South Wales, particularly professional services firms such as accountancy practices, law firms and architects, seeking an external IT partner.
Financial Health
HealthyHealthy · 0% CAGR over 2y
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Computed from 5 filingsOperates serviced apartments and aparthotel-style accommodation for short and extended stays, offering self‑catered studios and multi-bedroom units. Also provides coworking facilities, meeting rooms,…
Sells to business and leisure travellers seeking serviced apartments in Cardiff, including corporate bookers and construction stay customers. Also serves entrepreneurs, start-ups, creatives and…
Financial Health
StrongStrong · Growing, Hiring · 23% CAGR over 4y
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Computed from 5 filingsOperates a live music and events venue hosting concerts, DJ club nights, themed entertainment events and corporate functions. Also offers venue hire and in‑house street food kitchens for large-scale…
Serves consumers attending live music, club nights, bingo and sports screenings in Cardiff, plus event promoters, corporate teams and private organisers seeking a large flexible venue for gigs,…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
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Computed from 3 filingsProvides property auctioneering services alongside chartered surveying and RICS-backed property valuations and surveys. Also offers residential block management, insurance arrangement for blocks of…
Targets a B2C and B2B property audience: homeowners, landlords, investors, developers, auction buyers and sellers, and freeholders or managers responsible for blocks of flats.
Financial Health
HealthyHealthy · -9% CAGR over 2y
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Computed from 5 filingsProvides retrofit and energy services for social housing, installing technologies such as solar panels and batteries, aggregating homes to purchase electricity and participate in flexibility markets,…
Serves UK social housing landlords and their residents, alongside institutional investors and funders focused on climate and social-impact opportunities in housing retrofit and energy efficiency.
Financial Health
StrongStrong · Hiring · 47% CAGR over 4y
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Computed from 2 filingsProvides Microsoft-focused IT consulting and managed services, including identity and access management, cybersecurity, cloud transformation, and endpoint management. Delivers security operations,…
Serves B2B organisations and institutions using Microsoft environments, including legal, retail, utilities, healthcare, manufacturing, higher education, financial services and professional services…
Financial Health
StrongStrong · Hiring · 96% CAGR over 1y
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Computed from 3 filingsProvides vocational training programmes focused on digital and green skills, including apprenticeships, skills bootcamps, professional certifications, and regulated qualifications. Also offers…
Serves employers, government bodies and education providers across the UK, particularly in advanced manufacturing, semiconductors, healthcare, public sector, financial services, construction, and…
Financial Health
StrongStrong · Growing, Hiring · 21% CAGR over 2y
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Computed from 5 filingsOperates multi-sport training and leisure facilities offering indoor and outdoor courts, pitches and halls for activities including football, padel, netball, basketball and futsal. Provides venue…
Serves professional and grassroots sports clubs, community groups, schools, corporate event organisers, charities and individual users in Cardiff seeking sports training, events and leisure bookings.
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
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Computed from 5 filingsProvides health and safety training courses for businesses and individuals, including first aid, construction and utilities training. Delivers accredited programmes from bodies such as IOSH, CITB,…
Serves UK employers and individual delegates needing accredited health and safety qualifications, especially construction, utilities and workplace safety teams using CITB, IOSH, EUSR, UKATA and…
Financial Health
StrongStrong · Hiring · 14% CAGR over 4y
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Computed from 5 filingsProvides specialist employment law services to employers and employees, including advice on workplace disputes, HR and staffing issues, employment tribunal representation, and guidance on employment…
Serves private and public sector employers, HR professionals, business owners and senior managers, alongside individual employees and senior executives facing workplace issues across the UK, US and…
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HealthyHealthy · Hiring · 9% CAGR over 4y
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Computed from 4 filingsOperates a country house wedding venue offering exclusive hire for ceremonies, receptions and wedding breakfasts. Provides event planning support, landscaped grounds for photography, on-site…
Serves engaged couples seeking an exclusive luxury wedding venue in South Wales, particularly those near Cardiff, Bristol, Chepstow and M4 travel routes, plus families or friends researching venues…
Financial Health
StableStable · -4% CAGR over 3y
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Computed from 5 filingsProvides private ophthalmology services focused on cataract surgery and refractive lens replacement. Offers consultations, diagnostic assessments, and surgical treatments for conditions including…
Serves private patients with cataracts and other vision problems, including Bupa and Benenden members, in Wales and England; also works with referring optometrists.
Financial Health
HealthyHealthy · -58% CAGR over 4y
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Computed from 5 filingsOperates a membership association for the fintech and financial services sector. Connects companies, investors and academia through events, training and careers initiatives, industry advocacy,…
Targets fintech companies, financial services firms and ecosystem partners in Wales, including investors, academic institutions, training providers and employers connected to the Welsh fintech sector.
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
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Computed from 5 filingsProvides legal services to businesses, individuals and public sector organisations, including corporate transactions, commercial contracts, dispute resolution, employment law, property matters,…
Serves businesses, individuals and public sector organisations across Wales, England and beyond, including commercial clients, homeowners, families, employees, Welsh Government bodies and other…
Financial Health
StrongStrong · Hiring · 5% CAGR over 4y
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Computed from 5 filingsProvides marketing and creative services including graphic design, branding, website design and development, video production, social media management, copywriting, and digital marketing campaigns…
Serves public-sector bodies and private-sector organisations needing creative marketing support, including education, cultural, environmental, healthcare and hospitality clients.
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HealthyHealthy · -7% CAGR over 4y
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Computed from 5 filingsProvides legal services including residential and commercial conveyancing, private client advice, commercial and company law, litigation, debt recovery, bankruptcy and insolvency, landlord and tenant…
Serves individuals, landlords, tenants, and businesses or companies needing legal advice and representation, including clients who prefer Welsh-language service.
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StrongStrong · Growing, Hiring · 3% CAGR over 4y
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Computed from 5 filingsProvides recruitment and staffing services for permanent and contract roles across sectors including catering, office administration, finance, cleaning, manufacturing, healthcare and security. Also…
Serves private and public sector employers needing staff in catering, office administration, finance, cleaning, manufacturing, healthcare and security, mainly across South Wales and some UK-wide…
Financial Health
StrongStrong · Hiring · 8% CAGR over 4y
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Computed from 5 filingsDevelops, acquires and manages commercial real estate, including industrial and office properties. Markets and lets business premises such as warehouses, workshops and office units, and undertakes…
Serves businesses seeking commercial premises, including office, warehouse, manufacturing, light industrial and workshop units, as well as organisations needing commercial property development,…
Financial Health
StrongStrong · Growing, Hiring · 46% CAGR over 4y
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Computed from 5 filingsDevelops bespoke business software and web applications, including CRM systems, learning management platforms, workflow and logistics management tools, and database solutions. Provides software…
Sells to businesses and public sector organisations needing bespoke software, especially larger UK enterprises in healthcare, manufacturing, transport and logistics, education, sport and leisure,…
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StrongStrong · Growing · 0% CAGR over 4y
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Computed from 5 filingsProvides IT services including managed IT support, cloud infrastructure design, cybersecurity, and business connectivity. Implements and supports Microsoft 365, Azure, Dynamics and Sage systems, and…
Serves businesses and charities, including construction, distribution, manufacturing, warehousing, retail, SaaS, commercial property and other service-sector organisations.
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StrongStrong · Growing, Hiring · 86% CAGR over 4y
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Computed from 5 filingsProvides branding, design and communications services for charities, public sector bodies and mission‑driven organisations. Develops campaigns, visual identities, digital content and storytelling…
Serves purpose-led organisations, charities, social impact bodies and public sector teams, including healthcare, policing, education, entrepreneurship and sustainability organisations seeking to…
Financial Health
StrongStrong · Hiring · 7% CAGR over 4y
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Computed from 5 filingsOrganises tailor-made and small-group tours across England, Scotland and Wales. Offers private chauffeur-guided tours, self-drive holidays and rail itineraries, and arranges accommodation, transfers,…
Serves leisure travellers, couples and small groups planning holidays in England, Scotland and Wales, with a focus on overseas visitors including US and Canadian customers, plus travel trade partners.
Financial Health
StrongStrong · Hiring · 15% CAGR over 4y
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Computed from 5 filingsProvides public relations and strategic communications services including stakeholder and community engagement, consultation campaigns, and communications strategy for organisations involved in…
Serves organisations running infrastructure, housing, energy, environmental and public policy projects, including public bodies and private developers needing community engagement.
Financial Health
StrongStrong · Hiring · 27% CAGR over 4y
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Computed from 4 filingsProvides commercial property maintenance and engineering services, including plumbing, gas heating, boilers, air conditioning and ventilation, electrical installation and testing, roofing works, and…
Serves businesses, commercial property owners and industrial companies across Wales, South West England and the M4 Corridor, spanning varied sectors needing facilities and property support.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 2y
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Computed from 2 filingsEnvironmental charity delivering litter reduction campaigns, volunteer clean‑ups, and environmental education programmes. Supports community green spaces, runs school initiatives, and administers…
Serves a mix of B2C, education, community and public-sector audiences across Wales, including individual volunteers, community groups, schools and young people, businesses, and local authority…
Financial Health
HealthyHealthy · Hiring · 24% CAGR over 1y
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Computed from 5 filingsDesigns, installs and maintains fire safety and security systems for homes and businesses, including fire alarms, intruder alarms, CCTV, access control, emergency lighting and fire extinguishers.…
Serves homeowners and businesses in South Wales, including Cardiff, Newport and Bridgend, with buyers responsible for property security, fire safety and compliance in domestic and commercial premises.
Financial Health
StrongStrong · Hiring · 3% CAGR over 4y
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Computed from 3 filingsOperates day nurseries providing childcare and early years education for babies and young children. Services include play-based learning, outdoor and forest school activities, meals, and…
Serves parents and families seeking nursery and early-years childcare for babies and young children in South Wales and Bristol, including users of workplace nursery sites.
Financial Health
StableStable · 4% CAGR over 2y
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Computed from 3 filingsProvides a network and support services for independent financial advisers, including FCA compliance assistance, integrated technology platforms, business development support, investment and mortgage…
Serves independent financial advisers and IFA firm owners, including advisers starting a practice, switching from directly authorised or appointed representative models, changing networks, or…
Financial Health
HealthyHealthy · Hiring · 44% CAGR over 2y
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Computed from 5 filingsProvides regulatory compliance services for cosmetics and personal care products, including safety assessments, product registration, testing coordination, regulatory documentation, auditing, and…
Serves cosmetics and personal care businesses, including beauty brands, manufacturers, retailers and labs, selling or launching products across the UK, EU, US, MENA, APAC and other international…
Financial Health
StrongStrong · Hiring · 22% CAGR over 4y
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Computed from 3 filingsProvides recruitment and workforce management services, supplying temporary and flexible labour to manufacturing, distribution, logistics, and waste and recycling operations. Offers onsite workforce…
Serves UK organisations with large, fluctuating workforces, particularly manufacturing, distribution and logistics operations, waste and recycling firms, MRFs, municipal rounds and high-volume hubs…
Financial Health
StrongStrong · Profitable · -5% CAGR over 2y
Location
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Computed from 5 filingsActs as a specialist finance broker supporting mortgage advisers with complex lending cases. Arranges first and second charge mortgages, bridging finance, and other specialist property lending…
Sells to mortgage and finance brokers, including directly authorised and appointed representative advisers, helping them place clients with complex borrowing needs. Also serves individual borrowers…
Financial Health
StrongStrong · Growing, Hiring · 27% CAGR over 4y
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Computed from 3 filingsDesigns, manufactures and installs custom and modular exhibition stands for trade shows and events. Provides concept design, project management, workshop fabrication, transport, installation and…
Serves businesses, public sector bodies and event teams exhibiting at trade shows, conferences and public events across the UK, Europe and internationally.
Financial Health
StableStable · Hiring · 5% CAGR over 2y
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Computed from 4 filingsDesigns, manufactures and installs aluminium curtain walling systems, windows, doors, screens and façade elements for commercial, public sector and residential construction projects, providing…
Serves main contractors, developers and public-sector project teams on commercial, education, healthcare, public sector and residential building projects across the UK and Channel Islands.
Financial Health
HealthyHealthy · Profitable, Hiring · 4% CAGR over 3y
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Computed from 5 filingsProvides legal services including residential conveyancing, family and divorce matters, criminal defence, immigration advice, wills and probate, and estate administration. Offers legal consultation…
Serves individuals, families, property buyers and sellers, immigrants and defendants, plus local businesses needing commercial, licensing, lease and planning legal support across South Wales and the…
Financial Health
StrongStrong · 0% CAGR over 2y
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Computed from 3 filingsProvides event management and conference production services focused on public policy. Organises in-person, online and hybrid conferences, forums and briefings that bring together policymakers,…
Serves B2B and public-sector policy stakeholders, including EU and national government bodies, regulators, corporates, trade associations and experts in finance, technology, data protection,…
Financial Health
HealthyHealthy · Growing · 2% CAGR over 2y
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Computed from 3 filingsManufactures PVCu windows and doors for residential and commercial construction projects. Designs and supplies glazing systems including energy‑efficient and Passivhaus‑standard products, supporting…
Serves B2B construction customers, including installers, property buyers and developers, architects and designers, with emphasis on large-scale commercial developments, government-backed housing and…
Financial Health
StrongStrong · Growing · 3% CAGR over 2y
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Computed from 3 filingsProvides childcare training and apprenticeships for the early years sector, offering funded qualifications, management courses and continuing professional development programmes for nursery staff and…
Serves nursery settings and early years employers seeking funded staff development, apprenticeships and management training, alongside individuals pursuing childcare careers in the early years sector.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 2y
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Computed from 5 filingsProvides contract and commercial cleaning services for businesses, including offices, schools, medical surgeries, retail premises, car showrooms and communal areas, plus carpet and window cleaning,…
Serves businesses and organisations in South Wales and the South West, including offices, schools, surgeries and clinical facilities, car showrooms, retail premises, leisure sites and communal…
Financial Health
HealthyHealthy · Growing, Hiring · 4% CAGR over 4y
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Computed from 5 filingsProvides HR consultancy and business support services including employee relations advice, workplace policies, recruitment support, and HR management, working alongside accounting, tax, and…
Serves business owners and employers, mainly SMEs, looking for professional support with running, growing and managing their organisations.
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
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Key facts
About 5% of the trading cohort reports turnover above £5M (38 of 668 firms) — the rest sits below that revenue band.
5% of the cohort was incorporated since 2022 (36 firms), so a sizeable share is in its first few filing cycles.
Within the Cardiff SEO-plugin cohort, 54.8% also run website analytics and 32.6% run tag-management tooling, pointing to measurement-led site operations rather than metadata management alone.
Field Services & Trades account for 18.6% of the cohort and Construction for 16.9%, so local adoption is concentrated in web-visible service and project-based sectors.
ICO PECR guidance requires consent before non-essential cookies or similar tracking technologies are set, with UK GDPR and the Data Protection Act applying where analytics or cookie identifiers are personal data.
IAB UK reported that the UK digital advertising market reached £40.5 billion in 2025, up 10% year on year, with video investment at £9.3 billion.
The Advertising Standards Authority applies the CAP Advertising Codes across media, so SEO landing pages, paid search, affiliate content and social media marketing can fall within advertising rules where they are marketing communications.
What else do Yoast SEO users run?
Share of the 668 Yoast SEO-running UK companies where each technology was also detected. As of June 2026.
Who runs Yoast SEO in the UK?
By sector
Sectors overlap, so shares need not sum to 100%.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
7
Median headcount
£480.8K
Median UK turnover
5.7%
Above £5M turnover
36
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 1,185 companies, alongside financials and websites, in one Excel + CSV file.
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.
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.
Yoast SEO elsewhere
Frequently asked questions
How many companies in Cardiff use Yoast SEO?
How is Yoast SEO usage detected?
What kinds of companies use Yoast SEO in Cardiff?
What do Yoast SEO users in Cardiff also run?
How fresh is this data?
Can I get contact details for these companies?
Buy all 1,185 companies as a spreadsheet.
One Excel/CSV file with company details, websites and key data — yours to download and use.