Companies Using Site Kit in London: 1,250 Active Firms (2026)
Companies running website measurement tooling track search visibility, traffic and page performance across public websites in London.
The plug-in fits a familiar pattern in lower-cost marketing operations: a public-site measurement layer used by sales-led and service firms that want search, traffic and page-performance signals inside day-to-day website management. For companies running Site Kit, adoption usually signals a public website treated as a live acquisition channel, with marketing ownership held by a small central team or an agency relationship rather than a large in-house analytics function. Budgets tend to sit with website maintenance, content, paid search or demand-generation retainers, so implementation is usually closer to a marketing-operations decision than an enterprise software procurement.
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London has 1,250 active companies running Site Kit in 2026, a sizeable adopter base but still weighted towards smaller operating teams rather than higher-turnover groups. Reported staff across these adopters totals 4,049 people. The adoption picture tilts toward service and project-led markets, with field services and construction both represented at 9.0% of the cohort, alongside marketing agencies at 7.7%, education and training at 7.0%, and management consulting at 6.9%. That mix fits a market where search visibility and enquiry capture sit close to everyday commercial activity.
Running a site-measurement plug-in usually pulls marketing, website operations and compliance into the same buying conversation. Consent banners, tag firing rules and cookie categorisation matter because the tool sits on public pages and can connect usage signals with wider campaign reporting. Procurement tends to be light-touch for small service firms, but agencies and mid-market adopters still need ownership over account access, administrator privileges and removal when a supplier changes. The vendor ecosystem also favours bundled web-maintenance relationships: the same external partner may manage hosting, forms, search optimisation and reporting, which can make audit trails patchy unless roles are written down.
Adoption appears likely to follow the shape of the website-build market rather than a separate analytics buying cycle. Smaller firms tend to keep the plug-in while their marketing stack remains centred on a public content site and agency reporting. More mature operators may move measurement into broader tag-management, consent and customer-data workflows, leaving the plug-in as a convenient surface rather than the system of record. Consolidation pressure is therefore more about account governance and channel attribution than replacement for its own sake. The scarcer group is the mid-market adopter with enough traffic to need deeper analysis, but not enough internal capacity to run a dedicated web analytics function.
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 Site Kit rises with company size across the trading companies in this cohort. 0.2% of the 532,485 companies with under 10 employees run Site Kit (892 detected). 2.1% of the 15,364 companies with 10–50 employees run Site Kit (321 detected). 2.7% of the 1,763 companies with over 50 employees run Site Kit (47 detected). That is a 2.5% gap between the over 50 employees and under 10 employees bands.
1,250
Active firms
2026
78
Above £5M turnover
Trading firms
6
Median headcount
Filed accounts
2,710
Verified directors
Across this cohort
Top companies using Site Kit in London
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 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
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Computed from 5 filingsOperates an online reservation platform for a network of independently owned boutique luxury hotels worldwide. Provides hotel booking services through its website and app, and manages a membership…
Serves affluent leisure travellers booking boutique luxury hotels worldwide, as well as travel agents and independent luxury hotels seeking access to its reservations and membership network.
Financial Health
HealthyHealthy · -69% CAGR over 4y
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Computed from 5 filingsProvides residential property brokerage and management services including property sales, lettings, investment advisory, and marketing of new‑build developments, listing apartments and homes for…
Serves private property buyers, sellers, landlords, tenants and investors seeking residential apartments, family homes and new developments in London and surrounding areas.
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
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Computed from 4 filingsProvides smart building management technology that meters, monitors and controls energy, utilities and environmental systems. Offers cloud software, sensors and automation to track electricity, gas…
Serves UK organisations managing commercial buildings or estates, including retail, education, property, markets and facilities teams responsible for single sites or multi-site portfolios.
Financial Health
StrongStrong · Hiring · 9% CAGR over 3y
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Computed from 2 filingsProvides accounting and business management software for organisations, including modules for finance, payroll, CRM, sales and purchase processing, stock control, project management and reporting,…
Serves B2B customers of all sizes, from startups to large enterprises, with finance, accounting, operations, HR, payroll, sales processing, stock control and project management needs.
Financial Health
StrongStrong · Growing · 0% CAGR over 1y
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Computed from 5 filingsProvides B2B lead generation services, sourcing and qualifying sales leads through owned brands and digital channels. Uses data analysis, automation and sales outcome feedback to optimise targeting,…
Serves B2B companies with sales teams seeking exclusive, pre-qualified inbound prospects, particularly growth-focused businesses looking to scale revenue without retainers or long contracts.
Financial Health
StrongStrong · Hiring · 32% CAGR over 4y
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Computed from 3 filingsProvides consulting, implementation and managed services for Microsoft business applications. Specialises in Dynamics 365 ERP and CRM systems and the Microsoft Power Platform, supporting…
Serves mid-market and enterprise businesses, particularly finance, procurement, operations and customer service leaders in sectors such as retail, manufacturing, field service and waste management.
Financial Health
StrongStrong · Growing, Hiring · 91% CAGR over 2y
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Computed from 5 filingsPublishes a luxury lifestyle magazine and operates digital media platforms. Provides advertising, branded content, contract publishing and event services that promote luxury brands to high‑net‑worth…
Serves B2B luxury and premium brands seeking to reach high-net-worth and affluent consumers through media, digital, publishing and event channels.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
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Computed from 2 filingsProvides online trading services offering execution-only brokerage for contracts for difference (CFDs) and rolling spot foreign exchange. Enables trading in forex pairs, commodities, indices and…
Serves retail and professional traders seeking online CFD and rolling spot forex accounts, including users trading forex pairs, metals, energies, indices and cryptocurrencies.
Financial Health
StrongStrong · Hiring · 37% CAGR over 1y
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Computed from 2 filingsDevelops and provides enterprise trading technology for financial institutions, including multi-asset execution systems, pricing and risk management hubs, market connectivity, liquidity distribution…
Serves B2B financial markets clients, including retail brokers, institutional brokers, banks, liquidity providers, and buy-side or sell-side firms needing trading infrastructure and market access.
Financial Health
StrongStrong · -10% CAGR over 1y
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Computed from 5 filingsDevelops AI-powered digital banking software for banks and financial institutions. Provides platforms for personal financial management, transaction data enrichment and categorisation, customer…
Sells B2B to banks and financial institutions in global markets, targeting retail banking, deposits, customer engagement, digital banking and SMB/SME banking teams serving consumer and small-business…
Financial Health
HealthyHealthy · Growing, Hiring · 3% CAGR over 4y
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Computed from 4 filingsProvides AI‑powered due diligence and risk intelligence services for compliance teams, including a platform for automated screening, investigative reports, and escalation workflows supported by…
Serves compliance, risk, legal and third-party risk management teams at global enterprises and risk consultancies, particularly organisations operating across multiple jurisdictions in regulated or…
Financial Health
StrongStrong
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Computed from 5 filingsProvides media planning and media buying services for brands, developing advertising strategies, audience targeting and cross‑channel campaign plans. Uses data insights and performance measurement to…
Serves growth-focused brands and marketing teams, including organisations with commercial objectives that need media agency support, audience targeting and global campaign reach.
Financial Health
HealthyHealthy · Growing, Hiring · 2% CAGR over 5y
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Computed from 5 filingsProvides brand activation and experiential marketing services, including event design and production, pop‑ups and exhibitions, product sampling and demonstration campaigns, and promotional staffing…
Serves B2B marketing, brand and sales teams at consumer-facing brands and retailers, including FMCG, media, lifestyle, pet, health and outdoor brands running UK experiential, sampling and promotional…
Financial Health
StableStable · Hiring · 13% CAGR over 4y
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Computed from 3 filingsProvides coach and minibus hire for private groups, schools and corporate travel. Operates vehicles seating 29–75 passengers for airport transfers, school runs, tours, excursions, events and contract…
Serves schools, colleges, corporate clients, hotels, airport transfer partners and private groups in West London, across the UK and for European trips.
Financial Health
StrongStrong · Growing, Hiring · 33% CAGR over 2y
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Computed from 5 filingsDevelops revenue management software for consumer goods brands, providing tools for trade promotion management, deduction management, account planning, forecasting, and financial tracking to manage…
Serves B2B consumer goods brands, from emerging to international, targeting account managers, trade marketing, sales, revenue management, finance, accounting and demand planning teams across retail,…
Financial Health
HealthyHealthy · -5% CAGR over 4y
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Computed from 5 filingsProvides email and SMS marketing services for e‑commerce brands, focusing on customer retention and revenue growth. Develops campaign strategies, automated flows, and lead generation systems, and…
Serves B2B clients: fast-growth direct-to-consumer ecommerce brands, including online retailers with customer retention and lifecycle marketing teams, particularly Klaviyo users.
Financial Health
StrongStrong · Hiring · 41% CAGR over 5y
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Computed from 2 filingsProvides legal technology software and services for law firms, including practice management, legal accounts and case management systems, conveyancing searches and due diligence, AML/KYC checks,…
Serves UK law firms of all sizes, from sole practitioners and small to medium practices to large and top-tier firms, especially legal professionals involved in conveyancing, compliance, client…
Financial Health
StrongStrong · Hiring · 129% CAGR over 1y
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Computed from 5 filingsOperates serviced apartments and short‑term rental houses for leisure, corporate and extended stays. Offers furnished accommodation across multiple neighbourhoods, with booking management and guest…
Serves leisure travellers, corporate guests, relocating professionals and extended-stay visitors seeking accommodation in central London neighbourhoods, including groups or organisations requiring…
Financial Health
HealthyHealthy · Hiring · 58% CAGR over 4y
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Computed from 5 filingsSupplies fresh, frozen, smoked, and kosher seafood through an online store and wholesale orders. Offers products such as tuna loins and other fish, with home delivery and ordering for retail…
Serves consumers buying seafood online and wholesale buyers seeking fresh, frozen, smoked, chilled and kosher fish products for delivery.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
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Computed from 5 filingsProvides quantitative and qualitative market research services through an international network of agencies, collecting audience insights via online panels and surveys and supporting marketing,…
Targets global brands and larger businesses, especially insights, communications and marketing teams across healthcare, corporate, consumer and international markets.
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 4y
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Computed from 3 filingsDevelops software for packaging, containerising and streaming Windows applications so they can be deployed and managed across physical and virtual desktops. Provides tools such as Cloudpager to…
Sells to business IT teams managing Windows endpoints, especially enterprise and mid-market organisations using virtual desktops, cloud workspaces, Intune, Citrix, Azure Virtual Desktop, or Windows…
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StrongStrong
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Computed from 4 filingsProvides a carbon accounting software platform for food and hospitality businesses. Calculates company and product greenhouse gas emissions, including Scope 3 from procurement data, and generates…
Serves B2B food and drink organisations, including wholesalers, caterers, restaurants, pubs, hotels, manufacturers, brands, producers and event operators, particularly ESG and sustainability teams.
Financial Health
StrongStrong · Hiring · 11% CAGR over 3y
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Computed from 5 filingsProvides reputation management consulting for organisations, including stakeholder research and reputation intelligence, strategy development, communications and engagement programmes, and advisory…
Serves large organisations and NGOs globally, targeting leadership, strategy, communications, sustainability, public affairs, culture, HR, procurement, marketing and supply chain teams in FMCG,…
Financial Health
StrongStrong · Hiring · 6% CAGR over 4y
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Computed from 5 filingsOperates an online platform for booking chauffeur-driven car services and airport assistance worldwide. Provides transfers, hourly hire, and VIP meet-and-greet services, enabling travellers and…
Serves elite organisations, corporate travel teams, luxury travel providers and high-net-worth or VIP travellers arranging premium ground transport and airport assistance across international cities…
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StrongStrong
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Computed from 5 filingsProvides ESG and sustainability consultancy services including strategy development, carbon footprinting, net‑zero target setting, climate risk management, regulatory reporting support (e.g., CSRD,…
Serves corporate ESG and sustainability leaders across built environment, finance, food and beverage, hospitality, manufacturing, pharmaceuticals, professional services, retail, technology, media,…
Financial Health
StableStable · Hiring · 35% CAGR over 4y
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Computed from 5 filingsProvides parcel courier and delivery services, including same-day and next-day transport of documents, boxes and pallets. Offers multi-drop distribution, white goods and two-person deliveries,…
Serves businesses and consumers in London and across the UK, including organisations sending documents, boxes or pallets, customers needing multi-drop deliveries, and individuals moving home, office…
Financial Health
StableStable · -50% CAGR over 5y
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Computed from 5 filingsProvides commercial cleaning services for offices and facilities including schools, universities, medical sites, gyms and hospitality venues. Also supplies window, carpet and floor cleaning, waste…
Serves businesses and institutions in London and Kent, including offices of all sizes, universities, schools, nurseries, student accommodation providers, clinics and hospitals, gyms, hotels, pubs,…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
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Computed from 3 filingsProvides private security services including SIA‑licensed security guards, manned guarding, event stewarding, door supervision, close protection, dog handling, and concierge security. Also offers…
Serves businesses, property managers and organisations in London across events, retail, car parks, construction sites, corporate offices, hotels, residential developments, schools and nightclubs.
Financial Health
StrongStrong · Hiring · 88% CAGR over 2y
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Computed from 5 filingsProvides sustainability and ESG consultancy for the hospitality and tourism sectors. Services include energy assessments, carbon reporting, decarbonisation strategies, ESG data management through the…
Serves B2B customers in the hospitality and tourism sectors, especially hotels, hotel groups and tourism businesses worldwide, plus related real estate, finance and investment stakeholders.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 3y
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Computed from 5 filingsProvides managed procurement services through a marketplace of pre‑approved suppliers, enabling public and private sector organisations to procure consultancy, services, goods, works and technology.…
Serves public sector bodies, utilities, schools and private-sector organisations needing compliant procurement routes, including corporate leaders managing consultancy and wider services tail spend.
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StrongStrong
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Computed from 5 filingsProvides Salesforce consultancy services including CRM implementation, configuration, integration and ongoing support. Offers system audits, quick‑start deployments and managed services for…
Serves UK SMB and mid-market Salesforce customers, plus nonprofits, across sectors including high tech, financial services, professional services, construction, manufacturing, health and life…
Financial Health
StrongStrong · Growing, Hiring · 31% CAGR over 4y
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Computed from 5 filingsProvides quantitative and qualitative market research services, collecting primary data from consumer, business, and healthcare audiences. Conducts surveys and studies that support PR campaigns,…
Serves PR, marketing and business decision-makers at brands, agencies, B2B/corporate firms, consumer businesses, healthcare organisations, charities and public sector bodies seeking audience insight…
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StrongStrong · Growing, Hiring · 14% CAGR over 4y
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Computed from 4 filingsProvides market research data collection services, including survey programming, sampling and access to global respondent audiences, data processing, and analysis. Combines a proprietary platform…
Sells to B2B market research teams and insight professionals needing survey data collection, including agencies, consultancies, and in-house research functions at larger organisations seeking global…
Financial Health
StrongStrong · Growing, Hiring · 59% CAGR over 3y
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Computed from 5 filingsProvides managed IT services and technical support for businesses, including remote and on-site support, IT consultancy, network and infrastructure management, cybersecurity services, data migration,…
Serves London-based businesses needing outsourced or supplementary IT support, including organisations seeking ad hoc help, block-hour arrangements, fully managed support, consultancy, cybersecurity,…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
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Computed from 5 filingsProvides residential property services including block and estate management, property sales and lettings, landlord property management, investment support, and renovation and furnishing services for…
Serves a mix of B2C and B2B property clients, including homebuyers, renters, landlords, property investors, leaseholders and residential block or estate owners seeking sales, lettings, management and…
Financial Health
StrongStrong · Hiring · 10% CAGR over 4y
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Computed from 5 filingsProvides managed broadband and connectivity services using SD‑WAN and 4G/5G technologies, including bonded cellular broadband, temporary and primary internet access, VoIP, and network solutions for…
Serves UK businesses needing reliable connectivity, with emphasis on construction sites, marine operations, rural locations and organisations with poor fibre access; also addresses resellers and some…
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StrongStrong · Growing, Hiring · 19% CAGR over 4y
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Computed from 5 filingsProvides out-of-home advertising services focused on poster placements inside NHS hospitals. Partners with hospital trusts to install and manage poster sites and sells advertising space to brands and…
Serves UK advertisers, brands, agencies and public sector bodies such as councils seeking to reach patients, visitors and NHS staff in hospital settings.
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
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Computed from 5 filingsOperates Middle Eastern restaurants and an online shop selling meal kits, prepared meze, bakery items, spices, ingredients, and desserts such as baklava and Turkish delights. Also provides catering,…
Serves London restaurant diners, groups and private event organisers, plus UK consumers ordering Middle Eastern meal kits, meze, bakery items, sweets and ingredients online. Also targets wholesale…
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StrongStrong · Growing, Hiring · 4% CAGR over 4y
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Computed from 3 filingsProvides event management and production services, including audio‑visual production, exhibition and display design, broadcast and hybrid event delivery, logistics coordination, and design and print…
Serves B2B marketing, brand and events teams at organisations running conferences, exhibitions, investigator meetings and hybrid events, with visible experience in healthcare and pharmaceutical…
Financial Health
HealthyHealthy · Profitable, Hiring · 41% CAGR over 2y
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Computed from 3 filingsProvides risk management and sustainability (ESG) consultancy services, including development of risk frameworks, governance and sustainability strategies, training workshops, research, and…
Serves organisations of all sizes, from small exploration teams to large listed companies, across minerals and metals, agriculture, life sciences, transport, education, sport, financial services,…
Financial Health
StrongStrong · Growing, Hiring · 59% CAGR over 2y
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Computed from 5 filingsDesigns and sells pole fitness and aerial equipment, including removable dance poles, freestanding stages, aerial hoops, A‑frame rigs, and accessories. Products are engineered for home users,…
Sells to consumers and professional users in pole and aerial fitness, including beginners, home users, performers, instructors and pole studios seeking poles, stages and aerial equipment.
Financial Health
HealthyHealthy · 1% CAGR over 5y
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Computed from 5 filingsProvides technology consultancy, recruitment and project delivery services for data centre and AI infrastructure projects. Supports operators, investors and providers with strategic advisory, team…
Serves data centre operators, AI infrastructure providers and investors, particularly teams planning, scaling or deploying infrastructure programmes and hiring specialist project expertise across…
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StrongStrong · Growing · 0% CAGR over 4y
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Computed from 4 filingsProduces and sells craft beverages including fruit ciders, gin, tonic water, ready-to-drink gin and tonics, and iced teas made with African ingredients. Develops and markets beverage brands and…
Targets adult consumers and gift buyers interested in African-origin craft drinks, with direct online shopping for alcoholic and non-alcoholic beverages, merchandise and experiences.
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StrongStrong
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Computed from 5 filingsProvides market research data collection and analysis services for research agencies, consultants and corporate clients. Conducts surveys via online panels, CATI, face‑to‑face and mobile, and…
Serves B2B clients including independent research consultants, small to mid-sized market research agencies, PR and media firms, and international blue-chip corporations across sectors such as…
Financial Health
HealthyHealthy · Hiring · 12% CAGR over 5y
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Computed from 5 filingsProvides recruitment and staffing services focused on go‑to‑market (GTM) roles for fintech, payments and digital risk companies. Offers team build-outs, recruitment on demand, strategic hiring, and…
Serves B2B fintech, payments and digital risk companies, from early-stage firms to established market leaders, hiring talent for global go-to-market and revenue teams.
Financial Health
StrongStrong · Growing, Hiring · 24% CAGR over 4y
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Computed from 4 filingsProvides wholesale distribution of cleaning, hygiene and janitorial supplies including chemicals, washroom consumables, cleaning equipment, PPE and waste products to organisations across sectors,…
Sells B2B to UK organisations needing janitorial supplies, including schools, hospitals, food sites, public facilities, facilities management teams, restaurants, leisure venues, emergency services…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 5y
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Computed from 5 filingsProvides global IP communications via satellite and terrestrial networks, delivering internet, voice and video connectivity. Operates teleport facilities and supplies network infrastructure, data…
Serves governments, public sector bodies, enterprises, banks, diplomatic missions, NGOs, security and defence organisations, oil and gas/energy operators, and telecoms/ISP customers.
Financial Health
StableStable · Hiring · 25% CAGR over 5y
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Computed from 5 filingsProvides recruitment and executive search services, connecting businesses with candidates for leadership and specialist roles. Works with established companies, start-ups and expanding brands to…
Serves UK businesses from established operators to concept start-ups and roll-out companies, plus senior candidates, primarily those seeking leadership talent in a competitive recruitment market.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 4y
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Key facts
About 6% of the trading cohort reports turnover above £5M (78 of 1,250 firms) — the rest sits below that revenue band.
7% of the cohort was incorporated since 2022 (96 firms), so a sizeable share is in its first few filing cycles.
Site Kit users in London are almost entirely on WordPress, with WordPress also detected across 99.7% of the cohort.
Google Analytics is present on 85.8% of these websites, so Site Kit adoption usually sits inside a wider measurement stack rather than as a stand-alone tag.
Search optimisation tooling is common: Yoast SEO is also detected on 58.3% of the London Site Kit cohort.
Field Services & Trades and Construction are the largest tagged sector groups, each accounting for 9.0% of companies running Site Kit in London.
Google Tag Manager and reCAPTCHA are each detected on 39.0% of the cohort, pointing to a mix of marketing-tag governance and form-protection use cases.
What else do Site Kit users run?
Share of the 1,250 Site Kit-running UK companies where each technology was also detected. As of June 2026.
Who runs Site Kit 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.
6
Median headcount
£518.9K
Median UK turnover
6.2%
Above £5M turnover
96
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 2,167 companies, alongside financials and websites, in one Excel + CSV file.
How Site Kit 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.
Site Kit is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
Site Kit elsewhere
Frequently asked questions
How many companies in London use Site Kit?
How is Site Kit usage detected?
What kinds of companies use Site Kit in London?
What do Site Kit users in London also run?
How fresh is this data?
Can I get contact details for these companies?
Buy all 2,167 companies as a spreadsheet.
One Excel/CSV file with company details, websites and key data — yours to download and use.