Companies Using Lead Forensics in London: 123 Active Firms (2026)
London companies running website visitor identification tools use site-level engagement signals to support B2B sales and marketing.
Website visitor identification usually sits between web analytics and sales-development workflow, turning anonymous account-level visits into prioritised follow-up for commercial teams. In London, companies running this kind of tool tend to be business-to-business operators with a defined marketing operations function, a sales team that works named accounts, and enough website volume for prioritisation to matter. Adoption signals a company that is past basic lead capture: it is likely to monitor campaigns, score inbound intent, and route prospects into outbound sequences or account-based marketing. Engagements are typically bought by revenue, marketing or sales-operations leaders rather than by engineering teams.
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London has 123 actively trading companies running website visitor identification tools on their public websites. Reported headcount across the cohort is 3,428 employees, which points to a usage base that reaches beyond micro-business experimentation but still includes many smaller commercial teams. The pattern fits a capital-city sales environment: agencies, service providers, software sellers and distributors use website engagement signals to qualify inbound interest, shorten handover between marketing and sales, and give outbound teams a reason to prioritise named accounts already showing intent.
Procurement tends to focus less on technical deployment than on permissions, notice wording and how inferred company identity is used once a visit becomes a sales trigger. London users that pass visitor signals into customer relationship systems need clear controls for suppression, deletion and audit trails, particularly where marketing teams and sales-development teams share the same records. The market structure is also point-solution led: website identification usually has to justify itself through fit with analytics tags, forms, campaign tracking and pipeline reporting, rather than through ownership by a central engineering function.
Adoption appears likely to become more selective as revenue teams put visitor identification under the same scrutiny as other intent sources. Buyers tend to ask whether the signal changes sales behaviour, not simply whether it adds another dashboard. Browser privacy changes, consent practice and bundling by wider marketing platforms may make standalone tools harder to justify unless they feed cleanly into account prioritisation and reporting. The more durable use cases are likely to sit with firms that already run disciplined inbound, outbound and account-based motions, rather than with companies treating website traffic as a loose prospecting list.
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 Lead Forensics rises with company size across the trading companies in this cohort. 0% of the 532,485 companies with under 10 employees run Lead Forensics (79 detected). 0.2% of the 15,364 companies with 10–50 employees run Lead Forensics (34 detected). 0.6% of the 1,763 companies with over 50 employees run Lead Forensics (10 detected). That is a 0.6% gap between the over 50 employees and under 10 employees bands.
123
Active firms
2026
23
Above £5M turnover
Trading firms
5
Median headcount
Filed accounts
278
Verified directors
Across this cohort
Top companies using Lead Forensics 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 filingsProvides fintech software platforms for neobanks, banking‑as‑a‑service providers and online marketplaces, including core banking systems, internet banking, risk management tools, API hubs and…
Sells to B2B fintech and platform operators, including neobanks, marketplaces, BaaS providers, and transportation, food or car-sharing networks building or replacing financial infrastructure.
Financial Health
StableStable · -47% CAGR over 2y
Location
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Financial sub-scores
Computed from 3 filingsProvides payments technology and consultancy for banks and financial institutions, including the Icon Payments Framework software used to build and modernise payment processing infrastructure,…
Serves banks and financial institutions, particularly large banking groups and their payments, technology and engineering teams undertaking payments modernisation and infrastructure transformation.
Financial Health
HealthyHealthy
Location
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Financial sub-scores
Computed from 3 filingsDevelops financial transaction automation software for banks, including platforms for payment processing, financial messaging, securities operations, treasury workflows and reconciliation. Provides…
Sells B2B to banks and financial institutions, particularly payments, treasury, securities, reconciliation and operations teams needing transaction processing automation and SWIFT/ISO 20022…
Financial Health
HealthyHealthy · Growing, Hiring · 5% CAGR over 2y
Location
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Computed from 5 filingsProvides workplace design and consultancy services, delivering office fit‑out and refurbishment projects. Also supplies and installs office furniture and undertakes small works and project management…
Serves B2B clients including office occupiers and tenants, commercial landlords, coworking and serviced office operators, and higher education institutions across London and the UK.
Financial Health
WeakWeak · -66% CAGR over 4y
Location
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Develops regulatory technology software and provides consulting for compliance and risk management. Products include tools for sanctions and list management, risk modelling, screening assessment,…
Serves B2B compliance and risk teams in financial services, including tier 1 banks, multinational payment processors and fintech start-ups navigating global regulatory frameworks.
Financial Health
N/AN/A
Location
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Computed from 5 filingsProvides management consulting focused on commercial transformation, strategy optimisation and pricing. Uses analytics and applied AI to improve pricing models, sales effectiveness, decision-making…
Serves B2B organisations and senior commercial, pricing and strategy leaders across varied industries, geographies and business models seeking external consulting support for growth and profitability…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides payments software that enables businesses and nonprofits to issue payment cards and virtual IBAN accounts, connect to multiple payment service providers, and automate disbursements,…
Serves businesses and nonprofits needing card and virtual IBAN programmes for employees, users or beneficiaries, including humanitarian organisations, charities, education providers, care…
Financial Health
WeakWeak · -76% CAGR over 4y
Location
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Computed from 5 filingsDevelops AI-powered enterprise simulation software that models complex real‑world systems and runs scenario simulations. The platform enables organizations to generate and calibrate models, test…
Serves enterprise organisations across industries, targeting decision-makers and management teams that need scenario modelling, strategy testing and complex systems analysis.
Financial Health
WeakWeak · -28% CAGR over 5y
Location
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Computed from 3 filingsDevelops sales enablement and customer onboarding software. Provides digital sales room workspaces where sales teams share content, proposals, quotes and action plans with buyers, track engagement…
Serves B2B revenue teams, including BDR/SDR teams, account executives, customer success, account management, CROs and partnerships managers involved in sales, onboarding, account management and…
Financial Health
StrongStrong · Growing, Hiring · 78% CAGR over 2y
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Provides custom market research, procurement and supply chain intelligence, and advanced analytics for businesses. Services include consumer and market insights, commodity and category intelligence,…
Serves B2B clients at leading global enterprises, especially procurement, supply chain, commercial, sales, marketing and investment teams in CPG, energy, chemicals, industrials, financial services,…
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Computed from 5 filingsProvides aviation finance data, market intelligence and analytics, including aircraft transaction and valuation data, airline credit profiles, and industry reports. Also organises aviation finance…
Sells to B2B aviation finance professionals globally, including aircraft financiers, investors, airlines, operators, lessors, asset managers and dealmakers in commercial aviation.
Financial Health
StableStable · Hiring · 8% CAGR over 5y
Location
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Computed from 4 filingsProvides securities litigation monitoring and class action claims recovery services for institutional investors. Identifies settlement eligibility, manages and files claims, and secures recoveries.…
Serves institutional investors and financial services firms, including asset managers, asset owners, hedge funds, wealth managers, custodians, investment banks, broker-dealers, private equity and…
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 3y
Location
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Computed from 5 filingsProvides consulting and implementation services for the IFS Cloud enterprise software platform, including ERP, enterprise asset management, and field service management. Delivers system…
Serves B2B organisations in asset- and service-intensive sectors, including manufacturing, construction and engineering, energy, utilities, resources, telecommunications, aerospace and defence.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 5y
Location
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Computed from 5 filingsOperates professional networking communities and digital platforms that deliver industry events, meetings, insights, and marketing services for professionals in finance and retail. Provides member…
Serves professionals and organisations in financial services and retail, including FX, equities, fixed income and future-leader communities, plus brands seeking marketing or partnership access to…
Financial Health
WeakWeak · -62% CAGR over 4y
Location
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Provides marketing effectiveness consulting using data analytics and AI. Services include marketing mix modelling, creative effectiveness analysis, customer segmentation, test‑and‑learn…
Serves marketing leaders and teams at large consumer brands and global enterprises, including CPG companies, making significant marketing investment decisions.
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Computed from 3 filingsProvides digital engineering and technology services, including custom software development, cloud computing, data analytics, AI and automation, product engineering, digital commerce platforms, and…
Serves B2B enterprise clients, including healthcare organizations and pharmacy benefit management firms, plus companies pursuing digital commerce, enterprise data, product engineering and operational…
Financial Health
StrongStrong · Hiring · 145% CAGR over 2y
Location
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Computed from 5 filingsProvides IT consultancy and managed services focused on monitoring, observability, cybersecurity detection and IT reliability. Selects, implements and operates software tools that monitor digital…
Serves B2B clients worldwide, especially IT, operations and security teams in organisations with digital platforms and complex infrastructure requiring monitoring, observability, detectability and IT…
Financial Health
StrongStrong · Growing, Hiring · 40% CAGR over 4y
Location
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Computed from 3 filingsProvides office design and build services, including workplace strategy, interior design, refurbishment, Cat B fit-outs, and office relocation. Manages workspace projects from planning and…
Sells to businesses needing office relocation, refurbishment and fit-out services, including occupiers, coworking operators and firms shaping new workspaces. Targets companies actively planning…
Financial Health
StrongStrong · Hiring · 37% CAGR over 2y
Location
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Computed from 3 filingsProvides managed IT services including IBM Power and storage solutions, cloud hosting and migration, cybersecurity, data protection, backup and disaster recovery, and IT automation, along with…
Serves B2B and public sector organisations in regulated industries, including financial services, healthcare, education, construction, logistics, manufacturing, retail and media, targeting CIOs, IT…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 4 filingsProvides an online investment platform for wealth managers and financial advisers to access and administer alternative and tax‑efficient investments, including EIS and SEIS funds, venture capital…
Serves wealth managers, financial advisers and their high-value clients, primarily investors seeking UK tax-efficient and private-market investment options.
Financial Health
StableStable · Hiring · 15% CAGR over 3y
Location
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Computed from 4 filingsProvides consulting services in data and analytics, risk and regulatory compliance, and digital technology. Advises organisations on business transformation, process improvement, and…
Serves B2B organisations, especially enterprises with data and analytics, risk and regulatory, digital technology, innovation and business transformation functions seeking practitioner-led consulting…
Financial Health
StableStable · Hiring · 20% CAGR over 3y
Location
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Computed from 2 filingsDevelops a cybersecurity management platform that integrates with existing IT and security tools to discover devices, monitor asset inventories, validate controls such as EDR and MFA, and automate…
Serves B2B security and IT teams at larger organisations with complex device estates, including legal, finance, energy and retail companies, as well as CISOs responsible for cyber asset protection.
Financial Health
StableStable · Hiring · 53% CAGR over 1y
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Provides IT consulting and implementation services focused on enterprise software and digital transformation, including SAP and Microsoft platforms, ERP systems, data analytics, cloud solutions,…
Serves mid-market and enterprise organisations, including public sector bodies, across industries such as manufacturing, healthcare, financial services, retail, construction, utilities, travel, and…
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Provides data engineering and data management consulting and managed services. Implements and supports data platforms, data lakes and warehouses, and DataOps solutions using technologies such as…
Serves enterprise IT, data and architecture teams in organisations using Snowflake, Talend, AWS, Azure or Databricks, including retailers, logistics firms, utilities and energy companies with complex…
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Computed from 4 filingsDevelops identity and access management software delivered as a SaaS platform. Provides single sign-on, enterprise password management, multi-factor authentication, user provisioning, and access…
Sells to enterprise and public-sector organisations, especially IT and security teams in accountancy, energy and utilities, financial services, healthcare, policing and defence, and travel and…
Financial Health
WeakWeak · -21% CAGR over 3y
Location
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Computed from 5 filingsProvides an embedded claims technology platform for insurance and finance organisations. Offers APIs, no‑code tools and applications to automate claims processing, integrate data sources, run…
Sells to insurance and finance businesses globally, including insurers, brokers, MGAs, TPAs and law firms, targeting claims teams, transformation leaders and developers involved in digital claims…
Financial Health
WeakWeak · Hiring · 41% CAGR over 4y
Location
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Provides workplace strategy, office interior design, and design‑and‑build services for commercial workspaces. Delivers office fit‑outs, refurbishments, space planning, furniture consultancy, and…
Serves B2B office occupiers and commercial landlords across multiple sectors, mainly in London and the UK, including businesses changing workplaces and property owners preparing office space for…
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Financial sub-scores
Computed from 4 filingsProvides digital strategy and service design, user research, UX and product design, web application development, CMS and digital experience platforms, DevOps and cloud engineering, and data analytics…
Serves public and private sector organisations, particularly in healthcare and pharma, government, technology and information security, education, and finance, targeting teams responsible for digital…
Financial Health
DistressedDistressed · -10% CAGR over 3y
Location
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Provides ecommerce strategy, UX design and development services. Builds and maintains online commerce platforms and digital experiences using technologies such as Adobe Magento Commerce, React,…
Serves B2B and B2C ecommerce organisations, including retailers, consumer brands, finance providers and sports clubs with complex online ordering, omnichannel commerce or fan/shop experiences.
Financial Health
N/AN/A
Location
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Provides data engineering and data management consulting, including implementation and managed services for Snowflake, Talend and cloud data platforms. Offers a DataOps platform for Snowflake and…
Serves IT, data and analytics teams in medium to large organisations, including retailers, logistics firms, utilities and energy companies using Snowflake, Talend, cloud and modern data platforms.
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Develops AI-powered software for corporate legal teams to manage legal workflows including contract review and negotiation, document drafting, legal research, due diligence, and regulatory…
Serves corporate in-house legal teams and related procurement, compliance and claims functions, particularly in banking, insurance, industrial and mobility, technology, and professional services…
Financial Health
N/AN/A
Location
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Financial sub-scores
Computed from 3 filingsDevelops strategy management software used by organisations to plan, track and execute business strategies. The platform includes tools for strategic planning, KPI and metric tracking, risk and task…
Sells to organisations managing strategy execution, including charities, housing associations, enterprises and partner organisations. Targets strategy leaders, senior managers and teams that need…
Financial Health
WeakWeak · -24% CAGR over 2y
Location
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Computed from 5 filingsProvides Microsoft Dynamics 365 CRM and ERP solutions including Business Central, NAV and GP, alongside business intelligence, cloud computing, managed IT support, cybersecurity, data migration, and…
Serves UK businesses and not-for-profit organisations, including financial and professional services firms, logistics and distribution companies, healthcare and care providers, churches, accountancy…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides telecommunications and IT services including VoIP and unified communications systems, cloud and hosted platforms, data connectivity, mobile and fixed-line services, managed IT support,…
Serves UK businesses and organisations, with dedicated customer segments in education, charities and museums, plus office-based teams managing communications, connectivity and IT procurement.
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Computed from 3 filingsProvides data consultancy services including data analytics, data engineering and platform audits. Implements and supports analytics and data platforms such as Qlik, Microsoft, Snowflake, Databricks,…
Serves UK businesses and institutions using data platforms, especially hospitality operators, universities, manufacturers, and financial services firms such as banks, insurers and investment firms.
Financial Health
HealthyHealthy · Hiring · 20% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides recruitment and staffing services for financial services and technology organisations, specialising in roles across IT and digital development, quantitative and data science, cybersecurity,…
Serves financial institutions, investment banks, fund administrators, FinTech and digital organisations hiring IT, digital, quant, data science, cyber, and change/transformation talent.
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 4y
Location
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Computed from 5 filingsProvides managed IT services including helpdesk support, cloud and Azure management, cybersecurity, infrastructure hosting, and connectivity. Delivers migration, Microsoft 365 optimisation, device…
Serves UK businesses, particularly professional services firms in accounting, legal, financial advisory, wealth management, insurance and risk services, with buyers including operations and IT…
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
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Computed from 5 filingsProvides strategic experience marketing and event production services, including creative design and delivery of brand experiences, corporate conferences, exhibitions and trade show stands, with…
Serves large enterprise brands and corporate marketing teams seeking experience marketing, conferences, exhibitions and brand activations, with clients across technology, automotive, beauty,…
Financial Health
WeakWeak · -1% CAGR over 4y
Location
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Computed from 3 filingsDevelops and supplies management software for golf clubs, leisure centres, sailing clubs, spas, and other membership venues. Systems include CRM, membership management, bookings, point‑of‑sale,…
Serves B2B leisure and hospitality operators, including golf and sailing clubs, leisure centres, spas, hotels, health and fitness clubs, visitor attractions, holiday parks, universities, leisure…
Financial Health
StableStable · -2% CAGR over 2y
Location
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Computed from 5 filingsProvides IT infrastructure and data centre services including data centre migration, installation and consolidation, network and Wi‑Fi consulting, cloud and Microsoft 365 solutions, cybersecurity…
Serves B2B IT teams, infrastructure leaders and organisations with data centres, office networks or cloud environments, particularly those planning migrations, deployments, audits or workplace…
Financial Health
WeakWeak
Location
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Computed from 5 filingsProvides IT and communications systems integration services, including network connectivity, unified communications, cybersecurity, and managed IT support. Designs, implements and supports…
Serves SME businesses, large enterprises and public sector organisations, including local government, higher education, housing and healthcare, with buyers responsible for IT, communications,…
Financial Health
StableStable
Location
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Computed from 5 filingsProvides business telecommunications services including virtual and non‑geographic phone numbers, VoIP and hosted PBX systems, business broadband, and cloud-based call handling tools such as IVR,…
Sells to businesses, charities and public sector organisations needing business telephony and connectivity, including SMEs, call centres, healthcare providers, property firms, recruiters and…
Financial Health
HealthyHealthy · -2% CAGR over 5y
Location
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Provides office interior design, workplace consultancy, and design-and-build fit-out services for commercial offices, including CAT A and CAT B fit-outs, refurbishments, furniture supply, and project…
Sells to business and property-sector clients needing office design and fit-out, including landlords and tenants, with projects for legal, finance, insurance, real estate, charity, energy and food…
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Computed from 3 filingsProvides courier and logistics services including UK, European and worldwide parcel delivery. Offers e‑commerce shipping integration, fulfilment, pallet transport, long‑parcel delivery, import…
Sells to businesses and individual senders needing UK, European and worldwide parcel delivery, including ecommerce retailers using platforms such as Shopify and Magento, plus customers shipping long…
Financial Health
WeakWeak · -1% CAGR over 2y
Location
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Computed from 5 filingsProvides communications and public affairs consultancy services including corporate reputation management, national and local government relations, planning and development communications, community…
Serves businesses and organisations needing communications and public affairs support, including major consumer brands, national and regional property developers, and clients engaging with national…
Financial Health
DistressedDistressed · -10% CAGR over 4y
Location
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Supplies branded promotional products and printed merchandise, including clothing, drinkware, pens, conference materials and corporate gifts. Offers customisable items such as lanyards, bags, USB…
Sells to businesses and organisations, especially marketing, HR and events teams needing branded merchandise for campaigns, trade shows, customer loyalty, incentives and employee recognition.
Financial Health
N/AN/A
Location
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Computed from 5 filingsProvides IT consulting and managed technology services including digital transformation, data analytics, digital asset management, and IT infrastructure modernisation. Delivers cybersecurity services…
Serves businesses and organisations needing support with IT modernisation, cybersecurity, managed services and data analytics, across various industries and typically engaging technology…
Financial Health
StrongStrong · Growing, Hiring · 53% CAGR over 5y
Location
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Computed from 5 filingsProvides branding, digital design and campaign activation services for financial technology and capital markets companies, including brand identity development, marketing campaigns and creative…
Serves B2B fintech and financial markets firms worldwide, including capital markets technology providers, trading platforms, post-trade infrastructure, collateral management and enterprise financial…
Financial Health
HealthyHealthy · 0% CAGR over 5y
Location
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Provides office fit-out and refurbishment services for commercial buildings, including Cat A and Cat B fit-outs, tenant-ready spaces, and heritage building retrofits. Delivers technical building…
Serves B2B clients including commercial property owners, landlords, developers, serviced office operators and main contractors delivering office fit-out, retrofit and refurbishment projects.
Financial Health
N/AN/A
Location
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Computed from 5 filingsProvides recruitment services for compliance and regulatory roles, connecting employers with qualified candidates. Supports hiring and job searches within compliance functions and offers resources…
Serves a mix of compliance professionals seeking roles and employers hiring compliance talent, particularly banks and financial services organisations.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
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Key facts
About 18% of the trading cohort reports turnover above £5M (23 of 123 firms) — the rest sits below that revenue band.
4% of the cohort was incorporated since 2022 (5 firms), so a sizeable share is in its first few filing cycles.
61.0% also run a web analytics tag, and 46.3% also run a tag-management layer, suggesting that visitor identification is being paired with conversion tracking rather than used in isolation.
56.9% also run a content-management system and 43.9% an SEO plugin, placing much of the cohort close to organic-acquisition workflows.
B2B services dominate the sector mix: marketing agencies account for 19.5% and IT services and managed services for 13.8%, with tags allowed to overlap.
Advanced manufacturing and SaaS each account for 8.9%, while wholesale and distribution accounts for 8.1%, indicating use beyond pure marketing-services firms.
29.3% sit in the weak band and 10.6% in the distressed band, which may constrain spending on discretionary sales and marketing tools.
What else do Lead Forensics users run?
Share of the 123 Lead Forensics-running UK companies where each technology was also detected. As of June 2026.
Who runs Lead Forensics 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.
5
Median headcount
£674.6K
Median UK turnover
18.7%
Above £5M turnover
5
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 228 companies, alongside financials and websites, in one Excel + CSV file.
How Lead Forensics 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.
Lead Forensics is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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Frequently asked questions
How many companies in London use Lead Forensics?
How is Lead Forensics usage detected?
What kinds of companies use Lead Forensics in London?
What do Lead Forensics users in London also run?
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