Scale-Up Companies in London: 464 Active Firms (2026)
Scale-up companies grow revenue or headcount rapidly across sectors, with this London cohort concentrated in larger growth-stage operations.
Buying centres tend to sit with finance, operations, commercial leadership and compliance owners, because growth-stage London firms are usually buying systems, services and capacity for larger teams rather than experimental side projects. The cohort cuts across technology-enabled, financial, professional, consumer, industrial and healthcare markets, so sales motion varies: enterprise procurement for regulated or public-sector customers, mid-market relationship sales for business services, and direct consumer acquisition where the model is consumer-facing. Engagements are typically material enough to require management approval, implementation planning and hiring capacity, with recurring revenue, repeat usage or expansion across departments forming the commercial logic.
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London has 464 actively trading scale-up companies in this list, a relatively concentrated cohort given the cross-sector definition. Reported employment reaches 5,191, pointing to a set of firms with visible hiring capacity rather than purely founder-led vehicles. The commercial footprint is not tied to one vertical: the same London pool contains technology-enabled services, regulated activity, consumer models and industrial or healthcare operators, so revenue scale and procurement routes vary by underlying market.
GOV.UK treats scale-up status as a high-growth enterprise classification, not a licence or standalone industry. The OECD/Eurostat approach it cites measures sustained expansion through employees or turnover, which makes the label portable across software, finance, healthcare, consumer and industrial models. Regulatory exposure therefore follows the underlying activity. A payments, credit or investment business remains within the FCA perimeter; a firm also overseen for prudential reasons may engage with the PRA as well. The FCA Scale-up Unit exists for regulated financial firms moving from early growth into more complex supervision, rather than for every London scale-up.
London’s scale-up pipeline appears likely to stay uneven. Firms with recurring revenue, regulated-market permissions or embedded workflow roles tend to have better paths to larger contracts, but they also face longer procurement cycles and closer scrutiny from customers, lenders and regulators. Consumer-facing models are more exposed to acquisition costs and discretionary spending. Consolidation looks plausible where overlapping tools or service lines have reached similar customers, while many newer entrants may remain in an early-commercial band unless hiring capacity and repeatable sales motion continue to improve.
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
464
Active firms
2026
130
Above £5M turnover
58
Newer incorporations
since 2022
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Key facts
About 28% of the trading cohort reports turnover above £5M (130 of 464 firms) — the rest sits below that revenue band.
12% of the cohort was incorporated since 2022 (58 firms), so a sizeable share is in its first few filing cycles.
GOV.UK uses the OECD/Eurostat high-growth-enterprise test: average annualised growth greater than 20% per annum over a three year period, measured by employees or turnover, with 10 employees at the start of the period.
Scale-up is not a standalone regulated industry category in the UK; regulated firms remain subject to their sector regulator and permissions.
The FCA Scale-up Unit supports FCA solo-regulated firms and, with the PRA, dual-regulated firms that meet growth, revenue or valuation tests.
The ScaleUp Institute’s 2024 analysis says the UK scale-up economy comprises 34,180 businesses, less than 0.6% of the SME population but half of all SME turnover output.
OECD scale-up comparisons vary by definition: across 17 OECD and accession countries, about 38% of young SMEs become scalers compared with 22% of mature SMEs.
Top London Scale-Up companies
Financial sub-scores
Computed from 2 filingsProvides a B2B sales intelligence platform offering databases of company and decision‑maker contact information, including verified emails and mobile numbers. Supplies prospecting data, intent…
Serves B2B sales, marketing and RevOps teams at SMB, mid-market and enterprise companies, especially organisations prospecting to decision-makers across the UK, EMEA and global markets.
Financial Health
StrongStrong · Growing, Hiring · 39% CAGR over 1y
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Computed from 5 filingsProvides open banking infrastructure and APIs that enable businesses to connect to bank accounts, onboard users, initiate account‑to‑account payments, and manage payouts. Operates a Pay by Bank…
Sells to enterprise and growth-stage online merchants across Europe, including ecommerce, travel, food delivery and financial services brands handling high-volume consumer checkout and payouts.
Financial Health
WeakWeak · -73% CAGR over 4y
Location
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Computed from 4 filingsDevelops and operates an omnichannel demand‑side advertising platform that enables brands and agencies to plan, buy and measure digital advertising campaigns. Uses mobile app and location‑based data…
Serves B2B customers: brands, advertisers and media agencies managing omnichannel digital campaigns, especially marketing and media-buying teams focused on privacy-first audience activation and…
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 4y
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Computed from 5 filingsProvides APIs that connect banks and fintechs to small business accounting, ERP and financial systems, enabling secure data sharing, automated financial data collection, spend insights, and…
Sells to enterprise financial institutions—banks, fintechs, issuing banks, B2B payments providers and business lenders—that serve small and middle-market business customers.
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
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Computed from 5 filingsProvides a platform‑as‑a‑service for developers to build realtime features in applications. Offers APIs, SDKs, and messaging infrastructure supporting live chat, notifications, data streaming,…
Serves B2B software and internet companies, especially product and engineering teams building digital products in sectors such as fan engagement, customer experience, EdTech and HealthTech.
Financial Health
StableStable · -63% CAGR over 4y
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Develops and operates a cloud-based payments technology platform for financial institutions, enabling integration with payment schemes via APIs. Supports real-time and batch account-to-account…
Serves banks, payment service providers and fintech companies that need connectivity to UK, EU and US payment schemes, including firms handling high-volume account-to-account payments.
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Computed from 4 filingsProvides software and services for managing international workforces, including global payroll processing, employer‑of‑record employment, contractor onboarding and payments, HR information…
Serves startups, mid-market companies and enterprises with distributed or international workforces, targeting HR, payroll, recruiting and operations teams hiring employees and contractors across…
Financial Health
StrongStrong · Hiring · 38% CAGR over 3y
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Computed from 5 filingsProvides a platform for managing international hiring, including employer‑of‑record employment, contractor engagement, global payroll, and entity setup and administration. Supports onboarding,…
Serves scaling and mid-market businesses (100–5,000 employees) hiring internationally, with buyers across HR, legal, finance and executive teams managing global workforces.
Financial Health
WeakWeak · Hiring · 21% CAGR over 4y
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Computed from 2 filingsProvides motor insurance primarily for people new to the UK, using proprietary pricing and fraud models to assess risk without local credit history. Sells policies online and via a mobile app, and…
Serves consumers who have recently moved to the UK, especially drivers seeking car or van cover, and other marginalised customers whose circumstances make mainstream insurance pricing less suitable.
Financial Health
HealthyHealthy · Hiring · 46% CAGR over 1y
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Provides software platform for financial institutions that automates data ingestion, extraction, transformation and validation across capital markets operations, supporting processes such as trade…
Sells to capital markets firms and financial institutions, including banks, asset managers, custodians, hedge funds and securities services providers, particularly operations, regulatory reporting…
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Computed from 4 filingsProvides a platform for companies to hire, onboard and manage international employees and contractors. Offers employer‑of‑record services, global payroll processing, compliance management,…
Serves B2B companies expanding internationally, from startups and small businesses to mid-size firms and enterprises, especially HR, finance, customer support and sales teams in software, financial…
Financial Health
StrongStrong · Growing, Hiring · 123% CAGR over 3y
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Provides online business loans and credit lines to small and medium-sized businesses. Offers short‑term financing from £1,000 to £1 million with online application, rapid approval, flexible repayment…
Serves small and medium-sized UK businesses seeking short-term finance, including retailers and firms needing working capital, invoice, asset, vehicle, property or tax funding.
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Computed from 5 filingsOperates an online platform that connects businesses with multiple lenders to obtain financing. Enables users to submit a single funding request, compare loan and finance offers, and access products…
Serves UK businesses seeking finance, mainly SMEs comparing funding options, and also works with brokers, lenders and platform partners involved in business lending.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
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Computed from 5 filingsDevelops and operates a workplace communication and employee engagement platform delivered via mobile and web apps. Provides tools for internal messaging, news feeds, surveys, digital forms,…
Serves employers with frontline and distributed workforces, including healthcare, transit, manufacturing, logistics, facilities management, hospitality, retail, construction, real estate and EMS,…
Financial Health
StrongStrong · -62% CAGR over 4y
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Computed from 5 filingsProvides a software platform for employers to manage employee benefits programmes, including flexible spending allowances, benefits enrolment, rewards and recognition, and total reward statements,…
Sells to HR, reward and benefits teams at global enterprises and multinationals managing complex employee benefits across countries, plus benefits brokers supporting employer clients.
Financial Health
StrongStrong · Hiring · 130% CAGR over 4y
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Computed from 5 filingsProvides software platform for API management including open‑source API gateway, analytics, developer portal and dashboard, enabling organisations to design, publish, secure, monitor and scale APIs…
Sells to enterprise technology and platform teams, plus public sector organisations, in sectors including financial services, telecoms, travel, manufacturing, education, ecommerce and construction…
Financial Health
StableStable · -58% CAGR over 5y
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Provides global custody, trade execution, and investment administration services for wealth managers and financial advisers, alongside a digital platform for portfolio management, reporting, and…
Sells to wealth management and private client investment businesses needing B2B custody, execution, investment administration and digital platform support. Targets firms seeking scalable operations,…
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Computed from 5 filingsProvides working capital financing to e‑commerce businesses and online brands, including Amazon sellers. Offers lines of credit and term funding used for marketing, inventory and purchase orders,…
Serves B2B online businesses across the UK, EU and US, including Amazon sellers, high-growth ecommerce brands and retailers with roughly $10K to $500K+ monthly revenue seeking growth capital.
Financial Health
StrongStrong · Hiring · 53% CAGR over 4y
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Develops cloud-based HR management software that integrates core HR records, recruitment, onboarding, performance management, payroll, time tracking, benefits administration, and people analytics,…
Serves HR, payroll, finance and people-operations teams at fast-growing companies managing distributed or global workforces, including organisations with UK and US payroll needs.
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Computed from 5 filingsOperates a technology-driven expert network platform that connects businesses, consultancies and private equity firms with industry specialists for paid consultations, surveys and research calls, and…
Serves B2B research buyers at consultancies, private equity firms and investment teams, including professionals responsible for due diligence, market research, competitive intelligence and strategy…
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 5y
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Computed from 4 filingsOperates an online jobs marketplace and mobile app that connects workers with temporary and flexible roles at partner companies. Provides businesses with recruitment, workforce sourcing, scheduling…
Serves both job seekers seeking flexible local work and businesses needing temporary or flexible staffing, including large delivery and operational employers using workforce optimisation technology.
Financial Health
StrongStrong · Hiring · 142% CAGR over 3y
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Provides an embedded finance platform that enables ecommerce platforms, payment providers and other partners to offer working capital financing to small and medium-sized businesses. Funding is…
Serves B2B partners such as ecommerce platforms, tech providers, payment service providers, banks and brokers, as well as SMEs and merchants seeking business funding across the UK, Europe and USA.
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Computed from 5 filingsDevelops a building analytics platform that collects and analyses occupancy, environmental and operational data to provide insights on space utilisation, indoor air quality, safety, and energy…
Serves building owners, facilities managers and public-sector organisations in property, transport and healthcare, particularly teams responsible for safety, sustainability, space utilisation and…
Financial Health
DistressedDistressed · -8% CAGR over 4y
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Computed from 5 filingsProvides employer-of-record and global payroll services, enabling companies to hire and pay employees in over 150 countries without establishing local entities. Manages onboarding, employment…
Serves businesses expanding internationally, especially companies hiring and paying employees or contractors in overseas markets without local entities, across Europe, the US, India, APAC and other…
Financial Health
StrongStrong · Hiring · 69% CAGR over 4y
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Computed from 3 filingsDevelops enterprise software for sustainability management, enabling companies to measure carbon emissions and environmental impact, collect and standardise operational data, generate ESG and…
Sells to enterprise sustainability and ESG teams at large corporates, including Fortune 500 companies, major banks and global private equity firms with complex reporting obligations.
Financial Health
StrongStrong · Hiring · 224% CAGR over 2y
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Computed from 5 filingsDevelops a software platform for retailers to manage targeted reward and discount programmes. Provides tools to verify customer eligibility for groups such as students or key workers and deliver…
Sells to retail and ecommerce businesses, particularly marketing, loyalty and customer retention teams targeting shopper segments such as students, key workers and other verified groups.
Financial Health
StrongStrong · Growing, Hiring · 82% CAGR over 4y
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Computed from 5 filingsDevelops digital healthcare software that manages clinical pathways and remote patient monitoring. Platform collects patient data, images and questionnaires, automates triage and administrative…
Sells to NHS Trusts and other healthcare providers, targeting clinical, operational and digital transformation teams managing hospital, community, mental health and specialist care pathways.
Financial Health
StrongStrong · Growing, Hiring · 98% CAGR over 4y
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Computed from 4 filingsProvides a customer data platform that collects, unifies and processes customer data from multiple digital sources, enabling businesses to build customer profiles, analyse behaviour, and activate…
Serves B2C multi-channel consumer brands, including ecommerce, media, fintech and subscription businesses, targeting marketing, product, CRM and data teams managing large-scale customer engagement.
Financial Health
StrongStrong · Hiring · 41% CAGR over 3y
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Provides alternative data analytics platform for investment managers, integrating multiple third‑party and proprietary datasets with financial KPIs. Enables data discovery, evaluation and modelling…
Serves institutional investors and investment teams, including hedge funds, asset managers, pension funds and asset owners, plus alternative data vendors seeking access to discretionary investor…
Financial Health
N/AN/A
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Computed from 3 filingsDevelops software for marketing identity resolution and first‑party data activation. Provides tools to build ID graphs, recognise users across systems in real time, manage consent, and activate…
Serves marketing, data and digital leaders at fast-growing scale-ups and global enterprises with significant customer data, media spend, and CRM/CDP stacks.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 2y
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Computed from 4 filingsDevelops clinical software and virtual care services for GP practices and NHS organisations. Platform supports remote management of long‑term conditions, patient outreach and monitoring, care…
Serves NHS integrated care boards, primary care networks and GP practices, plus life sciences organisations seeking NHS-embedded patient access and evidence; also engages patients with long-term…
Financial Health
HealthyHealthy · Hiring · 62% CAGR over 4y
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Computed from 2 filingsDevelops software platforms for innovation management and market intelligence. Provides tools for organisations to crowdsource ideas and solutions, manage innovation projects, collaborate with…
Serves enterprise and public-sector innovation teams, including organisations in defence and aerospace, energy and environment, government, healthcare and life sciences, and professional and…
Financial Health
DistressedDistressed · -47% CAGR over 1y
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Computed from 5 filingsProvides cloud-based contract lifecycle management software that enables teams to draft, review, negotiate, approve, sign and store contracts. The platform uses AI to analyse and redline documents,…
Serves legal, HR, procurement, sales and finance teams at scaling businesses, especially B2B SaaS and marketplace companies such as food delivery, auto and travel platforms.
Financial Health
StrongStrong · Hiring · 54% CAGR over 4y
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Computed from 2 filingsProvides employer of record services and software for hiring and managing employees internationally. Handles employment contracts, payroll, benefits, tax compliance, and contractor management across…
Serves growing businesses and scale-ups hiring internationally, especially HR, finance and legal teams managing distributed employees, contractors, EOR switching, M&A or global expansion across…
Financial Health
StableStable · Hiring · 193% CAGR over 1y
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Computed from 3 filingsProvides a cloud-based platform for hiring, paying, and managing employees and contractors internationally. Offers global payroll processing, HR management tools, compliance support,…
Sells to businesses from startups to enterprises, especially HR, finance and operations teams managing international employees, contractors, payroll, compliance, IT and immigration needs across…
Financial Health
WeakWeak · Hiring · 134% CAGR over 2y
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Computed from 3 filingsProvides an online platform and legal support for startups and investors, offering company formation, founder and employment agreements, cap table management, share option schemes, fundraising…
Serves startup founders and early-stage companies, plus angel investors and syndicates, with emphasis on UK SEIS/EIS funding and investment processes.
Financial Health
StableStable · 3% CAGR over 2y
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Computed from 3 filingsProvides subscription-based hire of children's bicycles, allowing families to rent bikes for a monthly fee and exchange them for larger sizes as children grow over time.
Sells to UK families and parents seeking flexible children’s bike subscriptions, especially households that want bikes that can be exchanged as children grow.
Financial Health
DistressedDistressed · -91% CAGR over 2y
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Computed from 4 filingsDevelops workforce mobility and location management software for enterprises. Platform helps organisations manage employee relocations, business travel and remote work, with tools for tax and…
Serves large enterprises with global or distributed workforces, targeting HR, mobility, finance, tax and legal teams responsible for international assignees, business travellers and remote workers.
Financial Health
WeakWeak
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Computed from 5 filingsDevelops software for hospitality venues including restaurants, pubs and cafés. Provides a platform combining mobile ordering, payments, loyalty programmes, marketing tools and customer data…
Serves B2B hospitality operators, including high street restaurant groups, pubs, bars, QSRs, kiosks, cafés and coffee shops seeking customer loyalty, ordering, payment and marketing solutions.
Financial Health
HealthyHealthy · -1% CAGR over 4y
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Computed from 5 filingsDevelops workforce management software for shift‑based organisations, providing tools for employee scheduling, time and attendance tracking, mobile clock‑in, payroll data export, incident reporting,…
Serves shift-based organisations with hourly workforces, including live events venues, security firms, temporary staffing agencies and fire departments, targeting shift, operations, finance and HR…
Financial Health
StrongStrong · Hiring · 7% CAGR over 4y
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Computed from 5 filingsOperates an online marketplace platform connecting brands with independent digital, creative and marketing agencies. Provides tools for posting briefs, matching with agencies, and managing contracts,…
Serves marketing, brand and procurement teams at large organisations and major brands seeking vetted independent digital, creative, media, PR, research and technology agencies.
Financial Health
StrongStrong
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Computed from 5 filingsProvides a technology platform and regulated infrastructure for private market investing. Supports wealth and asset managers with fund structuring, investor onboarding, compliance, capital flows,…
Serves B2B financial institutions, including wealth managers, private banks, multi-family offices, fund managers, General Partners, asset managers and investment platforms seeking to scale private…
Financial Health
StableStable · Hiring · 42% CAGR over 4y
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Computed from 3 filingsProvides online multi‑currency business accounts with local IBANs, enabling companies to send and receive international payments via SWIFT and SEPA. Offers currency wallets, foreign exchange…
Sells to businesses trading internationally that need multi-currency accounts, cross-border payments and FX support, including firms handling high-value transfers and companies operating across the…
Financial Health
StableStable · Hiring · 7% CAGR over 2y
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Computed from 5 filingsDevelops and provides cloud-based digital shelf analytics software for consumer brands and retailers. The platform monitors product listings, pricing, availability, promotions, ratings and reviews…
Sells B2B to consumer packaged goods brands and ecommerce, category, retail media and sales teams managing products across major online retailers and marketplaces in multiple countries.
Financial Health
StableStable · -62% CAGR over 5y
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Computed from 3 filingsProvides technology-focused recruitment services including direct-hire staffing, embedded recruiters, and recruitment process outsourcing. Supports hiring across sales, technology and engineering…
Serves B2B startups, scale-ups and enterprise companies hiring across sales, technology and engineering roles, including talent acquisition and HR teams supporting UK, European and global growth.
Financial Health
DistressedDistressed · -29% CAGR over 2y
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Computed from 3 filingsDesigns, manufactures and sells electric bike conversion kits that retrofit standard bicycles with a motorised front wheel, battery pack and pedal‑assist system. Products are sold online for…
Sells direct to consumers who own bikes and want electric assistance, including riders of mountain, hybrid, road, folding/Brompton, step-over and single-speed bicycles in the UK, US and other…
Financial Health
WeakWeak · -32% CAGR over 2y
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Computed from 3 filingsDevelops software providing digital mapping, property data and research tools for commercial property professionals. Platform offers occupier data, transaction comparables, title boundary maps,…
Serves B2B customers in the UK commercial property sector, including property firms, commercial agents, valuers, developers, investors and architects.
Financial Health
StableStable · -2% CAGR over 2y
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Computed from 5 filingsProvides cloud-based software and services for live video streaming, aggregation, distribution and capture using public cloud infrastructure such as AWS, enabling broadcasters and OTT platforms to…
Serves B2B media customers, including major broadcasters, OTT streaming platforms, sports rights holders and media companies with high-volume live event video operations.
Financial Health
StableStable · -8% CAGR over 4y
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Computed from 5 filingsDevelops cloud-based project planning and coordination software for construction teams. The platform connects master schedules with lookahead planning, resource allocation, visual work plans, site…
Sells to B2B construction delivery teams on major projects, including civil infrastructure, rail and metro, energy, major buildings and nuclear, targeting site teams, engineers, planners and managers.
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
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Computed from 2 filingsOperates a group of performance marketing and digital marketing agencies. Acquires and merges fast‑growing agencies, providing shared resources, investment through an angel syndicate, and support for…
Targets founders and leadership teams of fast-growing performance marketing agencies, mainly UK/Europe-based businesses under 10 years old with EBITDA of £750k+ and multinational capability.
Financial Health
StrongStrong · Hiring · 50% CAGR over 1y
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How London Scale-Up companies work and how to sell to them
What they do
Most London scale-ups are past proof-of-concept and earn revenue through repeatable commercial motions rather than one-off experimentation. Software and technology-enabled firms tend to use subscriptions, usage-based pricing, licences or platform fees; services firms bill retainers, project fees or managed-service contracts; consumer and marketplace models rely on transaction margin, commission or repeat purchase. Pricing usually reflects departmental or multi-site use, so buying decisions often include implementation effort, account management, compliance review and integration work. The sale is less about a small pilot and more about whether the supplier can support a larger operating model without slowing internal teams.
Who they sell to
Customer bases vary by underlying sector, but most London scale-ups sell to buyers with budget ownership rather than curiosity budgets. Business-facing firms typically target CFOs, COOs, CTOs, commercial leaders, procurement teams and risk or compliance owners; regulated and public-sector-facing models encounter formal due diligence and tender-style processes more often. Consumer-facing scale-ups sell through direct acquisition, partnerships and performance channels, with finance and marketing teams watching unit economics closely. Contract values tend to sit above small-business discretionary spend, and sales cycles often lengthen once the customer needs security review, integration planning, legal negotiation or board-level approval.
What they buy
Most scale-up firms tend to spend on systems that reduce manual work and make growth more governable: CRM, billing, finance automation, HR, payroll, analytics, data warehousing, cyber security, identity management, observability and customer support tooling. They also buy outside expertise where internal teams are stretched, including audit, tax, legal, regulatory advice, recruitment, compensation benchmarking, communications, performance marketing and sales operations. Cloud infrastructure, office and facilities support, insurance and outsourced compliance also appear when headcount and customer obligations rise together. Sellers should expect more scrutiny than in early-stage accounts, because finance teams usually want evidence of payback, adoption and operational risk reduction.
Why and how to sell to them
Scale-up buyers tend to evaluate vendors when growth exposes operational gaps: finance close takes too long, sales forecasting becomes unreliable, customer support backlogs rise, security reviews block deals, or hiring creates inconsistent processes across teams. Useful triggers include senior leadership changes, new finance or operations hires, expansion into regulated customers, public-sector procurement, overseas sales, funding events, revenue rising above internal systems, or a move from founder-led selling to departmental ownership. Outbound works better when it names a specific friction and its commercial consequence, such as delayed invoicing, longer onboarding, audit risk or lost sales capacity, rather than pitching general efficiency.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. 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.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
Also in London
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Frequently asked questions
How many Scale-up companies are there in London?
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