Companies Using Google Tag Manager in Portsmouth: 388 Active Firms (2026)
Portsmouth companies running tag-management technology coordinate website scripts, consent-controlled tags and analytics pixels.
Adoption tends to sit with organisations that run measurable digital journeys rather than brochure sites alone. Buying centres are usually marketing, ecommerce, web operations and compliance, with finance or senior management involved where paid acquisition is material. Companies running this tag-management stack tend to have enough web traffic, campaign spend and third-party scripts to justify governance, but not always a large in-house digital team; agency support and part-time developer oversight are common. Field services, construction, advanced manufacturing, wholesale and marketing-agency users reflect a practical, lead-generation bias.
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Portsmouth has 388 actively trading companies running tag-management technology, making this a local adoption cohort rather than a proxy for the wider UK market. Reported employment across the cohort is 4,993 people, so the footprint is not confined to owner-managed sites or dormant web estates. The mix appears weighted towards service, construction, manufacturing and distribution businesses using websites for enquiries, quote requests, ecommerce or service delivery, with compliance and measurement sitting alongside day-to-day customer acquisition.
PECR and UK GDPR do most of the regulatory work for UK websites running tag-management stacks; there is no sector-specific licence for adopting the technology. ICO guidance requires organisations to tell users what storage and access technologies are present, explain what they do, and obtain prior consent to the UK GDPR standard unless an exception applies. The same guidance covers cookies, tracking pixels, link decoration, device fingerprinting, web storage, scripts and tags. Third-party technologies embedded in an online service remain part of the operator’s own compliance responsibility, which makes procurement as much a governance issue as a marketing-operations choice.
Adoption appears likely to persist where paid media, analytics and content management remain split across multiple teams or agencies. The pressure point is governance rather than installation: consent records, tag ownership and script clean-up tend to become harder as websites accumulate campaigns over time. Smaller Portsmouth users may keep the tag layer as an agency-managed utility, while more mature operators bring oversight closer to compliance, security and revenue teams. Consolidation in web-marketing stacks could reduce standalone tag sprawl, but it is unlikely to remove the need for auditable control of scripts and pixels.
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 Google Tag Manager rises with company size across the trading companies in this cohort. 1.4% of the 16,857 companies with under 10 employees run Google Tag Manager (240 detected). 16.7% of the 773 companies with 10–50 employees run Google Tag Manager (129 detected). 34.7% of the 72 companies with over 50 employees run Google Tag Manager (25 detected). That is a 33.3% gap between the over 50 employees and under 10 employees bands.
388
Active firms
2026
33
Above £5M turnover
Trading firms
7
Median headcount
Filed accounts
881
Verified directors
Across this cohort
Top companies using Google Tag Manager in Portsmouth
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 3 filingsOperates maritime museums and historic naval attractions, offering exhibitions, guided tours, and educational experiences about the Royal Navy. Manages museum sites, historic ships, aircraft, and…
Serves B2C visitors including families, tourists, naval-history enthusiasts and school groups, plus donors, corporate partners and online shop customers interested in Royal Navy heritage across its…
Financial Health
StableStable
Location
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Computed from 5 filingsProvides managed live chat services and customer engagement tools for websites, including 24/7 agent‑operated chat, SMS and WhatsApp messaging campaigns, and outbound call follow‑ups to capture…
Serves automotive retailers, dealerships and other businesses that rely on website enquiries, targeting sales, marketing and customer-service teams managing online visitors, messaging campaigns and…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
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Computed from 3 filingsProvides residential property sales and lettings, property auctions, and management of residential and commercial buildings. Also offers professional property services including lease extensions,…
Serves home buyers, sellers, renters and landlords, plus leaseholders, freeholders, block directors and commercial property owners/occupiers across Brighton, Bognor Regis, Portsmouth and the South…
Financial Health
StrongStrong · Growing, Hiring · 21% CAGR over 2y
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Computed from 5 filingsDevelops and sells home hair colouring and haircare products, including permanent and semi‑permanent dyes, lighteners, toners, shampoos, conditioners, and repair treatments under ranges such as…
Sells to consumers buying at-home hair colour and haircare products, and supplies retail stockists including beauty and pharmacy chains in the UK, Europe and the US.
Financial Health
StrongStrong · Hiring · 19% CAGR over 4y
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Computed from 5 filingsDevelops custom web and mobile applications and eCommerce systems. Provides cloud-based software development, UI design, backend infrastructure and APIs. Also develops proprietary products including…
Serves B2B startups and scaling companies, from local to global clients, particularly in eCommerce, PropTech, FinTech and EventTech, plus property professionals using inventory and inspection…
Financial Health
StrongStrong · Hiring · 13% CAGR over 5y
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Computed from 5 filingsProvides legal services to individuals and businesses, including family and matrimonial law, employment disputes, civil and commercial litigation, residential conveyancing, wills and probate,…
Serves private individuals and businesses, including families, employees, landlords, property buyers, startups and commercial organisations in Portsmouth, Waterlooville, Fareham and across the UK.
Financial Health
StrongStrong · Growing, Hiring · 3% CAGR over 4y
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Computed from 5 filingsSupplies IT hardware and related products through an online store, including computers, tablets, printers, peripherals, networking equipment, software and consumables. Also offers technical support,…
Serves business and education buyers, especially schools, purchasing IT equipment across computers, peripherals, audiovisual, mobile, software and networking categories.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 4y
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Computed from 5 filingsProvides residential estate agency and lettings services, including property sales, rental listings, tenant sourcing, landlord services, property valuations, and marketing of homes. Operates property…
Serves residential property buyers, home sellers, landlords, tenants and buy-to-let investors in Portsmouth, Southsea and surrounding areas.
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HealthyHealthy · Growing · 0% CAGR over 4y
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Computed from 5 filingsProvides contact centre and marketing support services for automotive and other sectors, including inbound and outbound call handling, sales and aftersales campaigns, website design and hosting,…
Serves B2B customers, mainly UK automotive businesses of all sizes, plus organisations in financial services and the public sector that need customer contact, digital marketing, CRM, training or…
Financial Health
StableStable · Hiring · 23% CAGR over 4y
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Computed from 3 filingsProvides chartered accountancy and tax advisory services for businesses and individuals, including audit and assurance, bookkeeping, payroll, company secretarial support, cloud accounting, cash flow…
Serves businesses, charities and individuals across Portsmouth, Hampshire and southern England, including medical and dental practices, property firms, landlords, construction businesses, care homes,…
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 2y
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Computed from 4 filingsSupplies CCTV and video surveillance equipment, access control systems, intruder alarms, and related security products through an online store, including cameras, recorders, detectors, intercoms,…
Sells B2B to security installers, electrical contractors and trade buyers across the UK needing CCTV, access control, intruder alarm, networking, lighting and related security products.
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StrongStrong · -90% CAGR over 2y
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Computed from 5 filingsProvides accountancy, audit, tax planning, and bookkeeping services alongside business advisory support. Also offers financial planning, wealth and estate management, and legal advisory services for…
Serves businesses—especially SMEs and business owners—and private clients, including owners and their families seeking accountancy, tax, financial, legal and wealth advice. Also targets firms looking…
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StrongStrong
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Computed from 5 filingsProvides construction, refurbishment, housing maintenance and facilities management services. Delivers new-build and extension projects, property renovations, responsive repairs, gas servicing, and…
Serves public and private sector clients across southern England, including housing associations, local authorities, schools, academies, colleges, universities, health and care providers, leisure and…
Financial Health
HealthyHealthy · Profitable, Growing, Hiring · 3% CAGR over 4y
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Computed from 5 filingsProvides pipe engineering and hydraulic fluid system services for marine and offshore sectors, including pipe and hose manufacture, hydraulic system builds, coded welding, flushing, mechanical…
Serves B2B and public-sector customers in the marine sector, including commercial vessel operators, military/naval organisations, offshore operators and prime contractors managing shipbuilding and…
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StrongStrong · Hiring · 14% CAGR over 4y
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Computed from 4 filingsDevelops application delivery controller (ADC) software and load balancing solutions that distribute network traffic, provide reverse proxy and web application firewall protection, enable global…
Targets engineers and IT infrastructure teams in businesses and mission-critical organisations, especially healthcare, object storage and industrial environments needing high-availability application…
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HealthyHealthy · -9% CAGR over 3y
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Computed from 5 filingsProvides healthcare and life sciences logistics services including direct‑to‑patient delivery of medicines and medical devices, radiopharmaceutical transport, clinical trial supply logistics, test…
Serves NHS Trusts, NHS partners, private healthcare manufacturers and suppliers, life science organisations, clinical trial teams, ecommerce businesses, and brands running experiential marketing…
Financial Health
HealthyHealthy · -64% CAGR over 4y
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Computed from 5 filingsSupplies topsoil, compost, manure, bark mulch and aggregates to domestic and trade customers through online orders and delivery. Provides bagged and loose-load soil products, landscaping materials,…
Sells to homeowners and trade customers needing topsoil, compost, manure, mulch and aggregates, including gardeners, landscapers and larger project buyers. Serves customers across Hampshire, West…
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StrongStrong · Hiring · 6% CAGR over 4y
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Computed from 4 filingsDevelops and supplies vehicle protection products and aftersales solutions for automotive and motorcycle dealers, including paint protection coatings, ceramic treatments, glass and tyre protection,…
Serves automotive and motorcycle dealerships, dealer groups and aftermarket partners internationally, with end consumers reached through those dealerships.
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Computed from 5 filingsProvides communications and digital marketing consultancy, including brand and marketing strategy, website and user experience design, web and software development, search engine optimisation, paid…
Serves businesses and organisations seeking support with digital and printed communications, including clients needing brand, website, ecommerce, software, marketing and audience growth expertise.
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StrongStrong · Growing, Hiring · 16% CAGR over 5y
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Computed from 3 filingsOperates an online venue search platform and enquiry service for conferences, meetings and events, listing hotels, conference centres and training venues, and assisting clients with venue sourcing,…
Serves businesses, associations and event organisers seeking UK meeting, conference, training and exhibition venues, plus venues wanting exposure to those buyers.
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HealthyHealthy · 0% CAGR over 2y
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Computed from 5 filingsDevelops and provides cloud-based enterprise software for automotive, truck, bus and equipment businesses. Its A365 platform, built on Microsoft Dynamics 365, integrates ERP, CRM and dealer…
Serves B2B organisations in the automotive, truck and bus, and heavy equipment sectors, including dealers, distributors, OEM-linked operations, rental and fleet businesses, and aftersales/service…
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Computed from 3 filingsProvides legal services for individuals including residential conveyancing, family law, employment disputes, immigration matters, wills and probate, property and inheritance disputes, medical…
Serves private individuals, families, employees, property buyers and sellers, landlords, migrants and claimants, as well as business clients, mainly across Hampshire, the Isle of Wight and beyond.
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StrongStrong · Growing, Hiring · 5% CAGR over 2y
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Computed from 5 filingsProvides financial planning and wealth management advice, including investment and savings planning, retirement planning, inheritance tax planning, protection planning, mortgages, and…
Serves private clients and business professionals in and around Hampshire, including business owners, company directors, senior executives, city professionals, retirees and people planning…
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StableStable · Hiring · 9% CAGR over 4y
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Computed from 5 filingsProvides umbrella payroll services for contractors and outsourced payroll solutions for recruiters and businesses. Manages contractor payments, tax and compliance, employee benefits and pensions, and…
Serves individual contractors and recruitment businesses that place contingent workers, including recruiters needing payroll, back-office support, invoice finance and international payroll services.
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HealthyHealthy · Hiring · 10% CAGR over 4y
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Computed from 5 filingsProvides workplace strategy, office design and architecture services, delivering office fit-out and refurbishment projects. Offers property evaluation and surveying, project management, and workplace…
Serves businesses and organisations planning office transformations or relocations, including financial services, publishing, gaming and housing-related firms. Targets workplace, property and…
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StableStable · 0% CAGR over 3y
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Computed from 5 filingsProvides mobile vehicle cosmetic repair services, including bumper scuff, scratch, stone chip and minor dent repairs, and alloy wheel refurbishment such as kerb damage and diamond‑cut wheel repairs…
Serves private vehicle owners across the UK and trade buyers, including car dealerships, fleet operators, insurers and rental companies, that need minor cosmetic vehicle repair services.
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StrongStrong · Growing, Hiring · 9% CAGR over 4y
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Computed from 5 filingsProvides building refurbishment and maintenance services including interior decoration, passive fire protection, electrical and fire alarm installation, insurance reinstatement works, and commercial…
Serves commercial, public-sector and institutional clients, including healthcare, leisure, residential property and insurance sectors, across Hampshire, Surrey, London, Sussex, Dorset and Berkshire.
Financial Health
StrongStrong · Hiring · 63% CAGR over 4y
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Computed from 5 filingsDevelops software for estate agents that supports property market appraisals, including interactive presentations, local market data integration, digital proposals and agreements, client follow‑up…
Sells to estate agency businesses, including agents and valuers managing market appraisals, client follow-ups and vendor nurturing.
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StrongStrong · Hiring · 19% CAGR over 4y
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Computed from 5 filingsProvides enterprise integration services on Microsoft Azure, connecting business applications and systems to automate data exchange and processes. Supports migration from legacy integration…
Serves enterprises and larger organisations with complex IT estates, especially Microsoft Azure users, businesses migrating from legacy integration platforms, and teams implementing major systems…
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HealthyHealthy · Hiring · 49% CAGR over 4y
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Computed from 5 filingsProvides construction and property contracting services including project management, refurbishment, restoration and decoration. Offers passive fire protection, electrical and fire alarm…
Serves B2B and public-sector clients in the South of England, including commercial property owners, landlords, insurers, healthcare, leisure and community facilities, and organisations managing…
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StrongStrong · Hiring · 9% CAGR over 4y
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Computed from 4 filingsProvides specialist cleaning and decontamination services including trauma and crime scene cleaning, biohazard and infection control cleaning, fire and flood damage restoration, mould and sewage…
Serves private- and public-sector buyers needing specialist cleaning and restoration, including property owners, facilities teams and organisations managing commercial, industrial or sensitive sites…
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Computed from 5 filingsDesigns and manufactures control systems for unmanned marine vehicles, including autopilots, remote control, navigation, communication and power management systems for uncrewed surface vessels and…
Serves B2B and public-sector organisations developing or operating uncrewed surface and subsea vehicles, including offshore energy and mining firms, oceanography teams, marine transport operators,…
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HealthyHealthy · -4% CAGR over 4y
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Computed from 4 filingsDevelops software for rail operators including control room systems, revenue protection and enforcement tools, case and appeal management, mobile workforce apps, and reporting dashboards that…
Sells B2B SaaS to UK rail operators and wider transport-sector organisations, especially operations, control room, revenue protection, enforcement, prosecutions, appeals and frontline workforce teams.
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StableStable · -75% CAGR over 3y
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Computed from 5 filingsProvides outsourced HR and recruitment process outsourcing services for employers, covering employee lifecycle activities including talent attraction, executive search, onboarding, compliance,…
Sells to businesses needing outsourced HR, recruitment and employee lifecycle support, including employers seeking a fully outsourced HR department, internal recruitment support, executive search,…
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StrongStrong · Growing, Hiring · 28% CAGR over 4y
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Computed from 5 filingsProvides headhunting and recruitment services for the luxury hospitality and ultra‑high‑net‑worth sectors, sourcing and placing staff for hotels, resorts, restaurants, cruise lines, superyachts and…
Serves luxury hospitality and ultra-high-net-worth sector employers, including luxury hotels, restaurants, superyacht owners, cruise lines, 5-star resorts and private estates needing senior and…
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StrongStrong · Growing, Hiring · 53% CAGR over 4y
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Computed from 5 filingsManufactures and installs bespoke joinery, fixtures and fittings for interior fit-out projects. Produces timber and metalwork elements including display units, counters and integrated fittings for…
Serves B2B clients in retail, commercial, hospitality and leisure sectors, including boutiques, beauty/spa brands, offices and high street stores across the UK, Ireland and mainland Europe.
Financial Health
HealthyHealthy · -65% CAGR over 4y
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Computed from 3 filingsProvides accessible transport and companion driving services, including wheelchair‑accessible vehicles, patient transport to medical appointments, and escorted trips for shopping, social activities,…
Serves individuals and families across the UK who need supported travel and companionship, including wheelchair users, older or disabled people, patients attending appointments, and young people…
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HealthyHealthy · Growing · 0% CAGR over 2y
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Computed from 4 filingsProvides business telecommunications services including mobile phone plans, hosted VoIP systems, virtual landlines, SIP trunks and fixed-line broadband. Offers integrated voice and internet…
Serves UK businesses of varying sizes, from start-ups and scaling mid-size teams to nationwide enterprises, including organisations with hybrid teams, multiple locations, and business telecoms needs.
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StrongStrong · Growing · 1% CAGR over 3y
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Computed from 5 filingsProvides digital marketing and web development services, including SEO, pay‑per‑click advertising, paid social media campaigns, ad creative, website design and development, UX/UI design, and website…
Sells to businesses seeking digital marketing and web development support, including brands in equipment hire, leisure, financial services, student accommodation and healthcare, with case studies…
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StableStable · Hiring · 34% CAGR over 4y
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Computed from 4 filingsProvides engineering, design, consulting and program management services for infrastructure, water, environmental, transportation, defence and industrial projects. Offers feasibility studies,…
Serves public-sector bodies, utilities and large enterprises in infrastructure, water, environment, defence, advanced manufacturing, science and mission-critical sectors, typically on major capital…
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Computed from 3 filingsOperates an online platform that compares quotes from vehicle scrap and salvage buyers. Connects car owners with recyclers and dealers, and facilitates the sale and collection of scrap, damaged,…
Sells to UK vehicle owners looking to scrap, recycle or salvage cars, vans and damaged or written-off vehicles. Also serves commercial and fleet owners disposing of business vehicles.
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StrongStrong · Growing, Hiring · 40% CAGR over 2y
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Computed from 5 filingsProvides work-based training programmes for employers and learners, including government-funded apprenticeships, Skills Bootcamps, Higher Technical Qualifications and commercial courses in areas such…
Serves employers across England, including levy-paying businesses, SMEs and local authorities, plus employees, self-employed and unemployed learners in sectors such as health, business services,…
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StableStable · -1% CAGR over 4y
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Computed from 3 filingsSupplies electronic components and connectivity hardware for IoT and embedded systems, including cellular, GNSS, Wi‑Fi and LoRa modules, antennas, gateways, batteries and edge computing devices. Also…
Serves OEMs, electronics manufacturers and engineering teams in the UK and Ireland developing IoT, wireless, embedded, positioning and smart metering products.
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Computed from 5 filingsProvides an all‑in‑one software platform for experience and event businesses to build branded websites, sell tickets and packages, process payments, manage bookings, run CRM and marketing campaigns,…
Serves B2B experience operators and creators, including music event organisers, entertainment and competitive socialising venues, and adventure businesses.
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Computed from 5 filingsSells used cars and vans through an online dealership platform. Provides vehicle search, part‑exchange and vehicle valuation services, and arranges motor finance options such as hire purchase and PCP…
Serves private motorists in Portsmouth and Hampshire looking to buy, finance, part-exchange or sell used cars and vans, including buyers seeking automatic or 7-seater vehicles.
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HealthyHealthy · Hiring · 5% CAGR over 4y
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Computed from 5 filingsProvides managed cyber security services including threat monitoring, managed detection and response, incident response, vulnerability management, email and cloud security, data protection,…
Serves businesses and organisations, with stated sector focus on financial services firms, industrial companies and housing associations; targets leadership, IT and security teams responsible for…
Financial Health
StrongStrong · Hiring · 27% CAGR over 4y
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Computed from 5 filingsDesigns and supplies safety gloves and disposable protective gloves for industrial and workplace use. Offers product ranges such as cut‑resistant gloves and the TraffiSystem classification system,…
Sells to business and individual buyers purchasing safety gloves and disposable hand protection online, including workplace safety and procurement customers seeking product guides, compliance…
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StrongStrong · Hiring · 13% CAGR over 4y
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Computed from 5 filingsProvides car and van leasing services for personal and business customers, offering contract hire and finance lease deals across multiple manufacturers. Also supplies electric and hybrid vehicle…
Sells to UK consumers and businesses seeking car and van leasing, including personal lease customers, business fleet buyers, and customers needing specialist vehicles such as wheelchair accessible…
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HealthyHealthy · -55% CAGR over 4y
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Computed from 3 filingsProvides broadband and business internet connectivity, managed network services, colocation and cloud hosting from a data centre, satellite and IPTV distribution, and IT consultancy and technical…
Serves homeowners and residential communities, plus businesses needing connectivity, colocation, hosting, satellite/IPTV distribution or IT support, including specialist data and media/entertainment…
Financial Health
StrongStrong · Growing, Hiring · 123% CAGR over 2y
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Computed from 5 filingsOperates an online platform arranging local home services by matching customers with vetted workers providing cleaning, gardening, handyman repairs, decorating, pet care, dog walking and other…
Serves homeowners and households seeking vetted local help in Petersfield, Farnham, Gloucester, Cheltenham, Winchester, Portsmouth, Chichester, Godalming and nearby areas.
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HealthyHealthy · Hiring · 5% CAGR over 5y
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Key facts
About 8% of the trading cohort reports turnover above £5M (33 of 388 firms) — the rest sits below that revenue band.
5% of the cohort was incorporated since 2022 (21 firms), so a sizeable share is in its first few filing cycles.
PECR and UK GDPR are the main compliance frame for tag-management users; ICO guidance covers cookies, tracking pixels, link decoration, device fingerprinting, web storage, scripts and tags.
A content-management platform is also detected on 61.9% of the Portsmouth cohort (240 firms), while a security and delivery layer appears on 42.8% (166).
Privacy and measurement tools are common adjacencies: 41.0% also run a bot-checking control (159) and 39.4% also run a web-analytics suite (153).
Sector overlap leans towards operational businesses, with Field Services & Trades at 17.3% (67), Construction at 13.1% (51) and Advanced Manufacturing at 11.6% (45).
IAB UK reported UK digital ad spend of £35.5 billion in 2024, with search at £16.6 billion and video display at £8.3 billion.
What else do Google Tag Manager users run?
Share of the 388 Google Tag Manager-running UK companies where each technology was also detected. As of June 2026.
Who runs Google Tag Manager 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
£583.3K
Median UK turnover
8.5%
Above £5M turnover
21
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 715 companies, alongside financials and websites, in one Excel + CSV file.
How Google Tag Manager 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.
Google Tag Manager is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
Google Tag Manager elsewhere
Frequently asked questions
How many companies in Portsmouth use Google Tag Manager?
How is Google Tag Manager usage detected?
What kinds of companies use Google Tag Manager in Portsmouth?
What do Google Tag Manager users in Portsmouth also run?
How fresh is this data?
Can I get contact details for these companies?
Buy all 715 companies as a spreadsheet.
One Excel/CSV file with company details, websites and key data — yours to download and use.