Companies Using BlockMark Technologies in London: 152 Active Firms (2026)
London companies running an identified website technology use it to support public-site compliance, trust or content workflows across the city.
Use of this stack usually sits with marketing operations, digital, compliance or IT rather than a line-of-business software buyer. Companies running it tend to treat the public website as a working channel for acquisition, evidence, policy communication and service delivery, not just a brochure. Adoption points to a maintained web estate, a budget for internal or agency support, and some discipline around consent, tagging, content quality and release control. The buyer shape is therefore practical: teams that need visible trust signals and dependable web operations, especially where client scrutiny starts before a sales conversation.
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London contains 152 actively trading companies running this technology, a compact adoption base by web-stack standards rather than a mass-market plugin footprint. Reported employment across those firms totals 3,302 people, which points to users with operating teams behind the website rather than owner-managed brochure sites alone. The cohort cuts across IT Services & Managed Services, SaaS, Education & Training, Legal Services and Management Consulting, matching a pattern of trust, content and compliance needs in client-facing services.
Public-site tooling at this layer touches consent banners, analytics tags, evidence pages and form handling, so procurement tends to involve marketing, IT and a privacy or compliance sign-off. London firms selling into legal, education, consulting and managed-services markets also face client due-diligence questions about hosting, retention, accessibility and incident processes. Because the technology often coexists with content-management, analytics, tag-management and edge-security tools, change control is usually less about a standalone install and more about who owns the website release cycle.
Adoption appears tied to maturing public-site governance rather than fashion-led stack changes. Companies with regulated buyers or advisory-led sales tend to keep tools that help prove provenance, consent handling and content control, while thinner websites may rely on agency defaults. The constraint is likely to be ownership: marketing wants conversion speed, compliance wants auditability, and IT wants fewer moving parts. Over time, similar functions may be bundled into broader web-governance platforms, which could make standalone detection less visible even where the underlying need remains.
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 BlockMark Technologies rises with company size across the trading companies in this cohort. 0% of the 532,485 companies with under 10 employees run BlockMark Technologies (63 detected). 0.5% of the 15,364 companies with 10–50 employees run BlockMark Technologies (74 detected). 0.5% of the 1,763 companies with over 50 employees run BlockMark Technologies (8 detected). That is a 0.5% gap between the over 50 employees and under 10 employees bands.
152
Active firms
2026
19
Above £5M turnover
Trading firms
11
Median headcount
Filed accounts
457
Verified directors
Across this cohort
Top companies using BlockMark Technologies 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 3 filingsOperates a private ophthalmology clinic providing laser eye surgery and lens-based vision correction procedures. Offers treatments including LASIK, PRK/LASEK, SMILE, implantable contact lenses and…
Serves private patients seeking laser eye, lens replacement and cataract surgery, including adults by age group, people with vision conditions, and international patients travelling to London.
Financial Health
StableStable · Hiring · 246% CAGR over 2y
Location
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Computed from 5 filingsProvides independent ratings and research on banking, insurance and investment products, comparing providers on customer experience and product features. Also offers consultancy, consumer testing,…
Serves consumers comparing financial providers, plus banks, insurers and other financial services firms seeking consumer-duty, fair-value, communications and customer-experience support; also…
Financial Health
StableStable · Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsDevelops and supplies core insurance software platforms for insurers, brokers and managing general agents. Products support policy administration, claims management, billing, underwriting,…
Serves B2B insurance organisations, including Lloyd’s and London Market syndicates, carriers, MGAs, brokers, and global insurers needing core operational platforms and market-specific technology.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
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Computed from 3 filingsProvides higher education courses focused on business and law, including undergraduate degrees with foundation years. Works in partnership with UK universities to deliver teaching, academic support…
Serves prospective higher-education students seeking Business and Law programmes, including undergraduates and foundation-year learners, with campus-based study options in London and Leeds.
Financial Health
StrongStrong · Profitable, Growing, Hiring · 667% CAGR over 2y
Location
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Computed from 3 filingsProvides public key infrastructure (PKI) and certificate authority services, including issuance and lifecycle management of digital certificates, identity verification, document signing and…
Serves enterprises and public-sector/national bodies needing sovereign PKI, targeting C-level leaders and IT, information security, compliance, audit, HR and legal teams.
Financial Health
StrongStrong · Hiring · 82% CAGR over 2y
Location
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Computed from 5 filingsProvides a technology platform for employers to manage worker financial benefits, including earned wage access, insurance products and reward programmes. Integrates with workforce shift data and…
Sells to businesses managing flexible, shift-based or on-demand workforces, with workers as end users. Targets employers of contractors, gig workers and hourly staff.
Financial Health
StrongStrong · Hiring · 82% CAGR over 5y
Location
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Computed from 5 filingsProvides teleradiology services and software for radiology departments, including remote diagnostic image reporting by specialist radiologists and a radiology business intelligence platform (OptiRad)…
Sells primarily to NHS radiology departments and hospital trusts needing teleradiology and workflow tools, and also to radiologists seeking reporting work through its platform.
Financial Health
StrongStrong · Growing, Hiring · 82% CAGR over 4y
Location
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Computed from 3 filingsOperates a barristers’ chambers specialising in commercial litigation. Members provide legal advice and courtroom advocacy in disputes involving banking, civil fraud, company and insolvency,…
Serves B2B and institutional clients needing barristers for complex commercial disputes, including companies, financial services firms, insurers, insolvency and energy businesses, as well as parties…
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 2y
Location
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Computed from 5 filingsOperates certification schemes, consumer codes, and dispute resolution services for the renewable energy and green technology sectors. Sets standards for businesses, administers consumer protection…
Serves both businesses and consumers in renewable energy, EV charging and green homes. Targets sector participants seeking certification or code membership, and consumers using accredited…
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 4y
Location
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Computed from 3 filingsProvides development and project management services for real estate projects, leading planning, design and construction teams on commercial, residential and mixed‑use developments on behalf of…
Serves property investors, developers, landowners and occupiers involved in large-scale, complex real estate schemes across London and the UK, including commercial, residential, mixed-use,…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 2y
Location
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Computed from 3 filingsDevelops and supplies LocataPro, a software platform for managing social housing services, including housing registers, allocations, case management and reporting. Also provides training, consultancy…
Serves UK local authorities and registered social housing providers, targeting housing teams and managers responsible for social housing services, compliance and resident casework.
Financial Health
HealthyHealthy · 4% CAGR over 2y
Location
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Computed from 5 filingsProvides anti‑money laundering (AML) and compliance services for estate agents and conveyancers through a software platform that manages identity checks, source‑of‑funds assessments, risk monitoring,…
Serves UK property-sector businesses, especially estate agents, conveyancing firms and MLRO/compliance teams involved in property transactions, with buyers and sellers as end users.
Financial Health
HealthyHealthy · Hiring · 18% CAGR over 4y
Location
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Computed from 5 filingsProvides outsourced clinical services to NHS organisations, including dermatology, gastroenterology and endoscopy, ENT and audiology, gynaecology, and radiology reporting. Delivers community and…
Serves NHS commissioners, Trusts and healthcare providers needing clinical capacity, elective recovery support and managed outpatient pathways across community and secondary care.
Financial Health
HealthyHealthy · Hiring · 144% CAGR over 4y
Location
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Computed from 4 filingsDevelops a human risk management platform for cybersecurity that analyses employee behaviour, runs phishing simulations, delivers security awareness training, and automates targeted guidance and…
Sells to enterprise cybersecurity, information security and security awareness teams in global organisations, including banks, insurers, manufacturers and pharmaceutical companies.
Financial Health
StrongStrong · Hiring · 15% CAGR over 6y
Location
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Computed from 3 filingsProvides healthcare data platform and cloud environment management services. Designs, implements and supports systems that aggregate and normalise clinical data from multiple sources, enabling…
Serves NHS and healthcare organisations, including Integrated Care Systems, GP practices, acute, community and secondary care providers, and health data teams needing managed clinical data…
Financial Health
HealthyHealthy · Hiring · 25% CAGR over 2y
Location
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Computed from 4 filingsDevelops digital care management software for care providers. Platform supports electronic care planning, staff rostering, and information sharing for residential, domiciliary and complex care…
Serves UK care providers, including family-run single care homes, larger residential and domiciliary care groups, and services supporting complex needs such as autism, learning disabilities,…
Financial Health
StableStable · -6% CAGR over 3y
Location
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Computed from 2 filingsProvides employer of record (EOR) services enabling companies to hire staff internationally without establishing local entities. Manages employment contracts, onboarding, payroll, tax, benefits and…
Sells to businesses hiring internationally, especially business founders and HR professionals expanding into overseas markets. Serves organisations managing global teams, employee relocations,…
Financial Health
StableStable · 0% CAGR over 1y
Location
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Computed from 3 filingsProvides consulting and managed platform services for the telecom sector, operating the Common Wholesale Platform and Common Switching Platform to connect wholesale network providers and retail ISPs,…
Serves UK telecom businesses, including access communications providers, network wholesalers, gigabit connectivity retailers and retail communications provider resellers needing wholesale access and…
Financial Health
StableStable · -18% CAGR over 2y
Location
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Computed from 5 filingsProvides cloud-based payroll software and managed payroll services for businesses. Platform automates payroll processing, HMRC compliance and reporting, and offers employee tools such as online…
Serves UK businesses of all sizes, particularly finance, HR and payroll teams in hospitality, manufacturing, retail, care homes and distribution/logistics, from small businesses to enterprises.
Financial Health
WeakWeak · Hiring · 65% CAGR over 4y
Location
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Computed from 5 filingsDevelops and provides creatiogreen, a configurable SaaS platform used by awarding organisations, membership bodies and training providers to manage qualifications, learner registration, assessment…
Serves B2B and public sector organisations delivering regulated or non-regulated training, courses, products or qualifications, including awarding organisations, membership and professional bodies,…
Financial Health
StableStable · -4% CAGR over 4y
Location
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Computed from 5 filingsProvides employee lifecycle management software for businesses, including a web-based platform for distributing payslips and employment documents, secure email, electronic signatures, and employee…
Serves public and private sector organisations of all sizes, mainly employers and their HR/payroll administrators, in the UK and beyond.
Financial Health
StableStable · Hiring · 46% CAGR over 4y
Location
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Computed from 4 filingsProvides healthcare communications and digital marketing services for pharmaceutical and healthcare organisations, including PR campaigns, product launch communications, patient activation…
Serves B2B healthcare and pharmaceutical organisations, including teams responsible for communications, digital marketing, patient activation, and product launches from evidence generation through…
Financial Health
HealthyHealthy · Hiring · 17% CAGR over 3y
Location
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Computed from 5 filingsProfessional body for financial advisers providing membership, professional standards, qualifications, training and continuing professional development. Offers events, publications and resources,…
Serves financial planning and advice professionals, from new entrants to experienced advisers, plus employers and associate firms seeking membership, qualifications, CPD and talent support.
Financial Health
HealthyHealthy · Profitable
Location
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Computed from 5 filingsProvides legal services to individuals and businesses, including corporate and commercial law, dispute resolution and litigation, employment, family and immigration law, private wealth and tax…
Serves individuals, families and businesses, including property buyers, private wealth clients and employers. Targets clients needing legal support in family, immigration, employment, tax, estate…
Financial Health
HealthyHealthy · -89% CAGR over 2y
Location
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Computed from 5 filingsProvides professional qualifications, membership programmes and certification verification for individuals working in accounting, bookkeeping, payroll and finance. Operates a network of accredited…
Serves accountancy, bookkeeping, payroll and finance learners and professionals worldwide, plus accredited training centres and employers or institutions needing qualification verification.
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides digital technology and platform engineering services, including development of web and mobile applications, API‑led systems integration, and design and management of secure cloud and…
Serves blue-chip private-sector organisations and public sector bodies, plus UK businesses using HMRC Making Tax Digital tools. Targets buyers needing secure digital platforms, cloud integration and…
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
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Computed from 5 filingsDevelops software tools and APIs that help organisations identify unclaimed government benefits and cost‑saving support for customers. Provides a benefits eligibility calculator, monitoring system,…
Sells to UK financial services, fintech, employee benefits and money-guidance organisations that support consumers on low or variable incomes, including teams managing digital customer journeys and…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
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Computed from 4 filingsProvides higher education courses including BA and BSc undergraduate programmes and foundation years in subjects such as business management, marketing, computing, accounting, finance, and health and…
Serves prospective undergraduate students, including mature learners and those with non-traditional educational backgrounds, seeking flexible higher education and career-focused study across UK…
Financial Health
StrongStrong · Growing, Hiring · 34% CAGR over 5y
Location
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Computed from 5 filingsProvides legal services to businesses and individuals, including corporate and commercial law, technology and fintech matters, civil litigation and dispute resolution, insolvency and restructuring,…
Serves individuals, entrepreneurs, startups, SMEs, professionals and international corporations, with client sectors including technology, fintech and digital currencies, real estate, insolvency,…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
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Computed from 5 filingsProvides online professional learning platforms delivering expert‑led video courses on finance, sustainability, AI and data. Offers subscription and white‑label training platforms used by…
Serves enterprise and large business clients seeking workforce learning in AI, data, finance and sustainability, including teams responsible for employee, customer, supplier or public stakeholder…
Financial Health
StrongStrong · Growing, Hiring · 32% CAGR over 4y
Location
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Computed from 5 filingsProvides water retail services to commercial customers, including business water and sewerage supply management, metering and consumption data services, billing and contract management, leak…
Serves UK non-household business customers, particularly organisations with complex water and wastewater accounts, trade effluent requirements, multi-site billing, metering and sustainability…
Financial Health
StrongStrong · Growing, Hiring · 3% CAGR over 4y
Location
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Computed from 5 filingsProfessional membership body for bookkeeping and finance practitioners. Provides accredited bookkeeping, accounting and payroll qualifications, training courses, anti‑money‑laundering supervision,…
Serves bookkeeping, accounting and finance professionals, students pursuing finance careers, training centres, universities and bookkeeping/accounting businesses, including members requiring AML…
Financial Health
StrongStrong · Hiring · 12% CAGR over 5y
Location
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Computed from 5 filingsDevelops evidence‑based digital therapeutics and mobile applications for managing chronic conditions such as COPD, asthma, diabetes and heart disease. Platform provides remote rehabilitation,…
Serves healthcare providers, NHS clinical teams and rehabilitation services managing patients with long-term conditions such as COPD, asthma, diabetes and heart disease, with patients as end users.
Financial Health
StableStable · Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsProvides professional membership, research, training and accreditation for customer service professionals and organisations. Publishes the UK Customer Satisfaction Index, offers consultancy and…
Serves UK businesses, public sector bodies and government organisations, plus customer service leaders, managers and professionals across sectors.
Financial Health
StableStable · -2% CAGR over 4y
Location
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Computed from 5 filingsProvides cyber security and data consultancy services, including risk assessments, managed security services, cyber awareness training, and incident response. Also delivers data strategy, data…
Serves government, intelligence and corporate organisations, plus high-performing businesses seeking support with cyber resilience and data capability.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 4y
Location
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Computed from 5 filingsProvides a data platform delivering litigation intelligence on UK High Court cases, aggregating and analysing claims data, outcomes, judges and parties to help law firms and in-house legal teams…
Serves UK law firms, disputes lawyers, legal knowledge and business development teams, and in-house legal departments at corporates involved in High Court litigation.
Financial Health
StrongStrong · Hiring · 24% CAGR over 4y
Location
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Computed from 3 filingsProvides specialist insurance for photographers, film and media production companies, studios, image libraries and creative professionals, including annual and one‑off production cover, commercial…
Serves creative professionals and media businesses, including photographers, videographers, photographic studios and agencies, image and film libraries, production companies, producers, camera…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 2y
Location
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Computed from 5 filingsDevelops and operates a digital platform used by hospitals to report and manage operational issues. The system connects clinical staff, facilities teams, helpdesks and medical device suppliers to…
Serves hospitals and healthcare organisations, particularly NHS trusts, plus medical device suppliers and facilities management providers working with hospital teams, helpdesks, clinical engineering,…
Financial Health
HealthyHealthy · Hiring · 100% CAGR over 4y
Location
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Computed from 5 filingsDesigns, manufactures and markets UKCA and CE marked medical devices for bowel management, pressure area care and infection control, including faecal management systems, pressure offloading boots,…
Serves healthcare organisations and clinical procurement teams caring for patients needing bowel management, pressure area care and infection-control products, including hospitals and care settings.
Financial Health
HealthyHealthy · Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsProvides medical insourcing services to NHS hospitals, supplying specialist clinical teams to deliver procedures and diagnostic services such as endoscopy, cardiology and neurophysiology, helping…
Serves NHS Trusts and hospital departments nationwide needing support with elective care waiting lists, RTT/DM01 targets and specialty pathways such as endoscopy, neurophysiology and cardiology.
Financial Health
StrongStrong · Growing, Hiring · 46% CAGR over 4y
Location
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Computed from 5 filingsProvides fibre-based internet connectivity for commercial buildings, installing network infrastructure that enables tenants to access dedicated business broadband from multiple carriers. Also offers…
Serves commercial landlords, property managers and office tenants in commercial buildings, plus businesses with multiple sites across the UK.
Financial Health
HealthyHealthy · -64% CAGR over 4y
Location
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Computed from 5 filingsProvides regulatory compliance consultancy for financial services firms, including FCA authorisation applications, audits and advisory, financial crime compliance, ICARA and FCA reporting,…
Serves B2B financial services firms, from niche start-ups to global leaders, including investment firms, mortgage businesses, payment service providers, fintechs, digital asset firms, insurers and…
Financial Health
StableStable · -61% CAGR over 4y
Location
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Computed from 4 filingsOperates the New Homes Quality Code, a code of practice for residential property developers. Sets standards for marketing, sales and after‑sales service in new‑build housing, registers participating…
Serves both B2B and consumers: UK residential property developers seeking registration under the New Homes Quality Code, and homebuyers of new-build homes covered by registered developers.
Financial Health
HealthyHealthy · Hiring · 82% CAGR over 3y
Location
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Computed from 5 filingsProvides AI and technology consultancy services, designing and building AI‑driven digital products, data platforms and cloud infrastructure. Offers machine learning deployment, data engineering,…
Serves C-suite and senior leaders at regulated financial services organisations, including banks, insurers, capital markets firms and asset managers, plus founders and growth teams in finance-related…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsProvides lift and escalator services including routine maintenance, repairs, emergency breakdown callouts, modernisation, decommissioning, and new lift installation. Supports ongoing servicing and…
Sells to businesses and property operators needing lift and escalator services, including commercial sites and multi-site organisations across London, the Home Counties and nationwide UK. Targets…
Financial Health
HealthyHealthy · Growing, Hiring · 5% CAGR over 4y
Location
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Provides regulatory compliance and risk management consultancy for law firms and other regulated businesses. Supports organisations subject to SRA, CLC, FCA, HMRC AML and ICAEW oversight with…
Serves B2B clients in regulated sectors, primarily law firms, sole practitioners and licensed conveyancers, plus accountants, financial services firms, estate agents, lenders, insurers, gambling…
Financial Health
N/AN/A
Location
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Computed from 3 filingsProvides customer experience consulting and training services to organisations. Works with brands to analyse customer and employee signals, improve service design, increase engagement, and measure CX…
Serves B2B organisations and service-led brands seeking customer experience support, including healthcare providers, hotel chains, retailers, airlines and train operators.
Financial Health
StableStable · -21% CAGR over 2y
Location
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Computed from 5 filingsOperates an egg bank supplying donor eggs for fertility treatments. Recruits and screens egg donors, maintains a donor database, and provides services including egg donation, egg freezing, and IVF…
Serves individuals and couples seeking fertility treatment with donor eggs, including UK and international patients, people pursuing IVF or surrogacy, and women considering egg freezing or…
Financial Health
StrongStrong
Location
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Key facts
About 12% of the trading cohort reports turnover above £5M (19 of 152 firms) — the rest sits below that revenue band.
7% of the cohort was incorporated since 2022 (11 firms), so a sizeable share is in its first few filing cycles.
Public-site stacks skew towards content-managed websites: 58.6% also run a content-management system, while 32.9% pair it with search optimisation tooling.
Measurement tooling appears often in the same stack, with 53.3% running web analytics and 44.1% running tag-management tooling alongside the website technology.
Security and trust layers are visible too: 44.7% also run an edge security or delivery service, and 31.6% run bot-check tooling.
Sector tags overlap, but IT Services & Managed Services account for 21.1%, SaaS for 17.1%, Education & Training for 13.8%, and Legal Services for 12.5%.
Financial-health classifications are spread across the cohort, with 32.2% in the highest band, 25.7% in the next band, 23.7% stable, 13.2% weak and 4.6% distressed.
What else do BlockMark Technologies users run?
Share of the 152 BlockMark Technologies-running UK companies where each technology was also detected. As of June 2026.
Who runs BlockMark Technologies 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.
11
Median headcount
£1M
Median UK turnover
12.5%
Above £5M turnover
11
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 248 companies, alongside financials and websites, in one Excel + CSV file.
How BlockMark Technologies 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.
BlockMark Technologies is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
BlockMark Technologies elsewhere
Frequently asked questions
How many companies in London use BlockMark Technologies?
How is BlockMark Technologies usage detected?
What kinds of companies use BlockMark Technologies in London?
What do BlockMark Technologies users in London also run?
How fresh is this data?
Can I get contact details for these companies?
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