Companies Using Greenhouse in London: 120 Active Firms (2026)
Companies using applicant-tracking technology in London recruit staff through website-integrated hiring workflows across the capital.
Hiring operations, people teams and talent-acquisition functions are the main buying centres here. Adoption usually points to employers with enough hiring volume to justify configured approval flows, structured interview stages and careers-site integration, rather than a single job-board plug-in. Typical engagements look like departmental software subscriptions with implementation support, permissions work and reporting set-up, often owned jointly by HR, operations and security. The cohort skews towards employers with recurring specialist recruitment needs, particularly software-led, financial-services and digital-services businesses where hiring managers need auditable candidate workflows across commercial, technical and operational roles.
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London has 120 active trading companies running this applicant-tracking stack on public websites, giving the capital a compact but researchable adoption base rather than a broad small-business sample. Reported employment across the cohort totals 4,044 people, so the footprint is visible without being dominated by very large employers. The sector mix also explains the buying behaviour: software-led firms, financial services and specialist digital businesses tend to need configurable job pages, interviewer coordination and candidate reporting before they build a large internal recruitment-operations team.
Plant-passport and phytosanitary-certificate rules matter for protected-crop operators, not for this recruitment-technology cohort. For these London employers, the relevant controls sit around candidate data, website consent and procurement assurance. Careers pages collect CVs, contact details, interview notes and sometimes equality-monitoring information, so UK GDPR and ICO expectations shape retention periods, access rights and processor checks. Security review also tends to matter at purchase: the system touches public web forms, email workflows and internal HR permissions, making vendor due diligence a routine part of adoption rather than a purely people-team decision.
Adoption appears to be moving from simple vacancy publishing towards more managed recruitment operations. Employers that already run structured careers pages tend to add tighter approval flows, cleaner reporting and better hand-offs between recruiters and hiring managers before replacing the underlying platform. Privacy review and security procurement are likely to remain friction points, especially where candidate information moves between web forms, email, HR systems and analytics tools. Consolidation may also matter: employers with overlapping hiring, onboarding and workforce tools have an incentive to reduce duplication, although specialist applicant-tracking systems still suit teams with steady role volume and formal interview processes.
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 Greenhouse rises with company size across the trading companies in this cohort. 0% of the 532,485 companies with under 10 employees run Greenhouse (76 detected). 0.2% of the 15,364 companies with 10–50 employees run Greenhouse (33 detected). 0.5% of the 1,763 companies with over 50 employees run Greenhouse (8 detected). That is a 0.5% gap between the over 50 employees and under 10 employees bands.
120
Active firms
2026
17
Above £5M turnover
Trading firms
5
Median headcount
Filed accounts
280
Verified directors
Across this cohort
Top companies using Greenhouse 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.
Provides media and marketing services including media planning and buying, data analytics, advertising technology, and campaign measurement. Integrates creative production, commerce, and audience…
Serves brands and advertisers as a B2B media and marketing partner, targeting enterprise and multinational companies across markets that need integrated media, data, commerce and analytics…
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Provides app-based retail banking services including current accounts, joint accounts and business accounts. Offers tools to manage spending, save money, hold ISA savings and make payments through a…
Serves UK consumers seeking personal, joint, savings and investing accounts, as well as small businesses and self-employed customers needing business banking.
Location
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Financial sub-scores
Computed from 5 filingsProvides investment management focused on private markets. Manages and advises funds and portfolios investing in private equity, infrastructure and private credit, and offers private wealth…
Serves institutional investors and private wealth channels seeking private markets exposure, including clients allocating to private equity, infrastructure, real assets and private credit strategies.
Financial Health
WeakWeak
Location
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Computed from 5 filingsOperates a proprietary trading firm that develops and executes model‑driven trading strategies in financial markets. Uses quantitative research, software development and technical infrastructure to…
Financial Health
StableStable · -20% CAGR over 4y
Location
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Computed from 3 filingsDevelops and publishes mobile video games, including racing and action titles such as CSR Racing and Star Wars: Hunters, using proprietary animation and physics technology as part of Zynga/Take-Two’s…
Serves consumer gamers worldwide, particularly mobile and console players interested in racing, action, and franchise-based titles, with additional educational resources aimed at parents, children,…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 20% CAGR over 2y
Location
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Operates a systematic trading firm that develops automated trading systems using quantitative research and software engineering to trade liquid financial instruments across electronic markets with…
Financial Health
N/AN/A
Location
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Computed from 2 filingsOperates esports competitions and online competitive gaming platforms, organising tournaments and leagues for multiplayer games. Provides event production, broadcasting, community platforms, and…
Serves global gamers, esports players, fans and creators, alongside B2B partners including game developers, publishers, media companies, advertisers and consumer brands seeking to reach gaming…
Financial Health
StrongStrong · Hiring · 67% CAGR over 1y
Location
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Computed from 4 filingsOperates an online savings platform that enables individuals, businesses and charities to deposit cash across multiple bank savings accounts through a single application, portfolio dashboard and cash…
Serves personal savers, businesses, charities and financial advisers seeking access to multiple UK bank savings accounts and cash deposit options through one platform.
Financial Health
StableStable
Location
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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
Location
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Computed from 3 filingsDevelops a digital analytics platform that collects and analyzes user behaviour data from websites and apps, providing product analytics, session replay, heatmaps, A/B testing, and experimentation…
Serves product, data, engineering, marketing and executive teams at startups and enterprises, including financial services, B2B, media, healthcare and ecommerce organisations.
Financial Health
StrongStrong · Hiring · 32% CAGR over 2y
Location
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Computed from 5 filingsDevelops AI-powered robotic sorting systems and analytics for waste management facilities. Provides 6‑axis robotic equipment and software that identifies and separates materials such as plastics,…
Sells to waste management businesses and materials recovery facility operators globally, especially sorting plants handling plastics, metals, fibre, cartons and WEEE.
Financial Health
StrongStrong · Growing, Hiring · 44% CAGR over 4y
Location
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Computed from 5 filingsProvides digital advertising and marketing services including media planning and buying, strategy, creative development, data analytics, search and influencer marketing. Uses a proprietary platform…
Serves large B2B and B2C brands seeking digital advertising and marketing support, including enterprise marketing teams at global and North American consumer brands, publishers, and retail-led…
Financial Health
StrongStrong · Hiring · 24% CAGR over 4y
Location
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Computed from 5 filingsDevelops a mobile and web transport navigation application that provides journey planning across public transit, walking, cycling and other modes. Maintains transit data for cities and offers…
Sells to urban public transport users via its consumer app, and serves city governments, transport agencies and institutions needing journey planning and rider insights. Also targets brands and…
Financial Health
StrongStrong · -10% CAGR over 4y
Location
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Computed from 5 filingsDevelops and operates technology-driven trading strategies in financial markets. Focuses on building and managing a diversified portfolio of proprietary trading strategies supported by quantitative…
Financial Health
HealthyHealthy · -4% CAGR over 4y
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Computed from 5 filingsProvides influencer marketing services for brands including campaign strategy, creator sourcing and partnerships, social media content campaigns, paid amplification, and performance measurement using…
Serves global consumer brands and CMOs seeking creator-led social media growth, with campaigns spanning multiple markets and stages of the marketing funnel.
Financial Health
StrongStrong · Hiring · 68% CAGR over 5y
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Computed from 5 filingsOperates a digital advertising platform that delivers and manages campaigns across websites, mobile apps, and connected TV. Provides ad formats, creative production, audience data, and performance…
Serves B2B customers: brand advertisers and marketing teams, plus premium media owners, publishers and OEMs, across open-internet digital advertising channels.
Financial Health
StableStable · Hiring · 5% CAGR over 4y
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Develops AI software for in-house legal teams that automates contract review, document drafting, legal research, and workflow management. Platform integrates with business tools to manage legal…
Serves in-house legal teams at small businesses, mid-market companies and enterprises, with adjacent users in commercial, HR, sales and finance teams needing governed access to legal workflows.
Financial Health
N/AN/A
Location
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Computed from 3 filingsProvides digital identity verification and authentication technology for businesses. Offers APIs and platforms for consumer onboarding, identity proofing, fraud prevention, and returning‑user…
Sells to enterprises and digital businesses needing consumer identity verification, including banks, fintech lenders, cryptocurrency platforms, healthcare providers, insurers, marketplaces, merchants…
Financial Health
HealthyHealthy · -5% CAGR over 2y
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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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Provides management and technology consulting to financial services firms, including asset and wealth managers, insurers and alternatives managers. Services include strategy, enterprise architecture,…
Serves financial services firms, particularly asset and wealth managers, insurers, retail investment providers and alternatives investment managers, plus strategy and technology leaders within those…
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Manages private markets investment strategies and funds focused on private equity, infrastructure and private credit. Provides investment management and private wealth products, including listed and…
Serves institutional and private wealth investors seeking private markets exposure, including clients allocating to private equity, infrastructure, real assets and private credit through specialist…
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Operates fibre‑optic network infrastructure across Europe, providing dark fibre, metro and long‑haul wavelength services, Ethernet and internet connectivity, colocation, and cloud connectivity…
Serves B2B telecoms and connectivity buyers across Europe, including wholesale carriers, financial services firms, media and content companies, mobile operators, data centres, enterprises, and…
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Operates digital healthcare clinics providing telehealth consultations with certified practitioners, prescription treatments, diagnostics and ongoing care programmes. Services cover reproductive…
Serves consumers as patients, mainly women and men seeking digital care for chronic and preventative health needs, including reproductive health, weight management, sexual health, hair loss and…
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Computed from 4 filingsDevelops and provides a collaboration and messaging platform used to coordinate operational workflows. Software includes team chat channels, integrations, incident response playbooks, and deployment…
Serves B2B and public-sector buyers in mission-critical environments, including governments, militaries, critical infrastructure operators, financial services, energy, utilities, transport,…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 2 filingsProvides media planning and buying services for advertisers, developing marketing strategies and campaigns using media, content and data-driven technology to influence consumer decisions across…
Serves global brands and enterprise marketing teams seeking agency support for consumer-facing media, content and technology programmes.
Financial Health
WeakWeak · -11% CAGR over 1y
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Computed from 3 filingsProvides technology platforms and operational services for demand‑responsive and shared public transport. Offers microtransit software, route planning and scheduling tools, mobility apps, and turnkey…
Serves UK councils, transport authorities and public transit operators, plus paratransit, education, university, corporate campus and healthcare organisations responsible for moving riders, students,…
Financial Health
StrongStrong · Hiring · 15% CAGR over 2y
Location
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Operates a quantitative trading firm that develops and runs systematic, data‑driven trading strategies across multiple asset classes and markets. Builds proprietary technology and models to trade…
Serves professional and institutional investors in financial markets, alongside its own capital, with emphasis on allocators to systematic strategies across asset classes, geographies and time…
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Computed from 5 filingsDevelops AI-powered software and mobile apps for creating and editing visual content, including photo and video editing tools, image and video generation models, and an influencer marketing platform…
Serves individual content creators and creative professionals, plus studios, enterprises, marketers and brands seeking AI-based creative workflows, visual storytelling, influencer marketing and…
Financial Health
StrongStrong · Growing, Hiring · 35% CAGR over 4y
Location
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Provides a spend management platform that links corporate credit cards with software for tracking expenses, collecting receipts, processing invoices, and reconciling transactions. Includes budgeting…
Sells to finance teams, CFOs and operations leaders at businesses managing corporate card spend, expenses, invoices and multi-entity or cross-border operations, with integrations for ERP, HRIS and…
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Computed from 5 filingsDevelops psychometric and skills assessment tools used by employers to evaluate candidates and employees. Provides online personality, cognitive ability and motivation tests, video interview…
Serves businesses and HR professionals responsible for recruitment, career management, team cohesion and employee development, including organisations using ATS/HRIS platforms.
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
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Computed from 5 filingsDevelops generative AI software tools and provides IT managed and professional services for public sector organisations, particularly local councils. Products automate tasks such as EHCP drafting,…
Serves UK local councils and public-sector organisations, particularly local authority leaders, IT teams, social care, SEND and frontline service teams.
Financial Health
HealthyHealthy · -59% CAGR over 5y
Location
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Computed from 5 filingsDevelops data intelligence software providing access to global corporate, ownership and trade records. Platform maps relationships between companies and individuals to support supply chain risk…
Serves enterprise and public-sector risk teams, including trade compliance, financial crime, procurement, law enforcement, regulatory, defense and intelligence analysts investigating corporate,…
Financial Health
StrongStrong · Hiring · 86% CAGR over 4y
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Computed from 5 filingsProvides a software platform for product analytics and user experience management. Tracks user interactions in applications, with features including session replay, in‑app guides, feedback…
Serves B2B product, engineering, marketing and customer success teams at software-led companies managing web/mobile apps and AI agents across digital product portfolios.
Financial Health
StrongStrong · Hiring · 30% CAGR over 4y
Location
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Computed from 5 filingsProvides electronic trading and market‑making services in global financial markets, specialising in exchange‑traded products and digital assets. Uses proprietary technology and risk management to…
Serves institutional financial market participants, including exchanges, trading platforms, brokers, asset managers and other counterparties across global ETP and digital asset markets.
Financial Health
WeakWeak · -10% CAGR over 4y
Location
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Computed from 5 filingsProvides advisory, analytics, and coalition‑building services focused on transforming economic systems including energy, food and nature, materials, urban areas and finance; also incubates and…
Serves senior leaders and organisations in business, government, finance, civil society and investment working on sustainability transitions across energy, nature and food, materials, urban areas and…
Financial Health
WeakWeak
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Computed from 3 filingsDevelops a cloud-based digital commerce platform for enterprises. Provides APIs and tools for building and managing B2C, B2B and direct‑to‑consumer online stores, including product catalogues,…
Serves enterprise B2C, B2B and D2C commerce teams across retail, fashion, food and grocery, telecoms, automotive, healthcare, wholesale, electronics and media sectors.
Financial Health
StableStable · Hiring · 36% CAGR over 2y
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Provides liquidity in global derivatives markets through options market making. Develops and operates proprietary trading technology and low‑latency infrastructure to analyse market data, price…
Serves institutional participants in global derivatives markets on a B2B basis, particularly exchanges, brokers and other financial market counterparties needing options market liquidity.
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Computed from 4 filingsEngages in proprietary trading of equity derivatives, using quantitative analysis and in‑house electronic trading platforms to execute market‑making and arbitrage strategies, providing liquidity…
Financial Health
StableStable · 0% CAGR over 3y
Location
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Computed from 5 filingsProvides financial technology consulting and engineering services, including development of trading and risk platforms, quantitative modelling support, UX and front‑end systems, and cloud and DevOps…
Serves financial services businesses in global markets, especially trading, risk, quantitative, data and analytics teams needing senior engineering support for complex platforms.
Financial Health
StableStable · Hiring · 13% CAGR over 4y
Location
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Computed from 3 filingsProvides cloud-based human resources software for managing employee performance, engagement, goals and compensation. Platform includes performance reviews, surveys, analytics, OKR tracking and AI…
Serves B2B HR and people operations teams, managers and executives at companies seeking support for employee performance, engagement, compensation and workforce analytics.
Financial Health
StrongStrong · Hiring · 123% CAGR over 2y
Location
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Computed from 5 filingsDevelops software for insurance brokers and risk professionals to ingest, validate and analyse property and casualty exposure data. Platform processes property schedules, remediates data issues, and…
Serves B2B insurance and risk professionals, particularly property and casualty brokers, servicing teams, producers and analytics teams managing large property portfolios and submissions for…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides market data, analytics, and research on energy storage and power markets. Offers a platform with revenue benchmarks, forecasts, and valuation tools for battery and solar assets, alongside…
Serves B2B energy market participants, including investors, developers, asset managers, structured finance teams, and traders involved in battery storage, solar, renewables, co-location, and data…
Financial Health
StrongStrong · Growing, Hiring · 75% CAGR over 4y
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Computed from 2 filingsDevelops and operates quantitative trading strategies that provide liquidity across financial markets, using algorithmic models, proprietary technology and data analysis to trade financial…
Financial Health
HealthyHealthy · Hiring · 200% CAGR over 1y
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Computed from 5 filingsProvides over-the-counter liquidity and trading services for digital asset markets, including derivatives and spot crypto. Offers market making, OTC trading, stablecoin swaps, and liquidity solutions…
Serves institutional digital-asset market participants globally, including asset managers, funds, banks, brokers, exchanges, fintechs, crypto projects and digital asset treasuries; does not serve…
Financial Health
StableStable · Hiring · 7% CAGR over 4y
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Computed from 5 filingsDevelops enterprise software for commercial and specialty insurers to manage underwriting operations. Provides a SaaS platform that connects underwriting data, workflows, pricing, and submissions,…
Sells to commercial and specialty insurance organisations, including Tier 1 and Tier 2 carriers, MGAs, reinsurers, Lloyd’s syndicates, and London market insurers managing complex underwriting…
Financial Health
HealthyHealthy · -43% CAGR over 4y
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Develops algorithmic trading systems using machine learning to generate price forecasts for financial instruments including equities, fixed income, currencies, commodities and cryptocurrencies, and…
Serves institutional financial market participants worldwide, offering liquidity to clients across equities, fixed income, currencies, commodities and crypto; does not serve individual investors or…
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Computed from 5 filingsDevelops and distributes a digital note‑taking application for iOS, Android, Windows and web that enables handwritten and typed notes, handwriting search, audio recording and transcription, document…
Serves a mix of B2C and B2B users: students, teachers and schools, individual planners and journalers, and business teams using digital notes for meetings, workshops and collaboration.
Financial Health
WeakWeak · -6% CAGR over 4y
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Computed from 5 filingsProvides AI-focused consulting, software engineering, and training services. Designs and implements data, cloud, and AI platforms, intelligent automation, and digital products, helping organisations…
Serves B2B organisations, especially enterprises, seeking AI, automation, cloud, data, software engineering and training support across sectors such as insurance, travel and other digital…
Financial Health
StrongStrong · Hiring · 58% CAGR over 4y
Location
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Computed from 3 filingsProvides strategy advisory and venture-building services for corporations, investors and governments. Designs and runs venture studios, corporate venture capital funds and joint ventures, and…
Serves boards and leadership teams at established corporations, private equity firms, governments and sovereign entities, particularly in retail, deep tech, financial services, media and…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides automated laboratory hardware, reagents, and cloud-based software for designing and running biological engineering experiments. Offers “cloud lab” services, data tools, and protocols that…
Serves B2B organisations running biological R&D labs, including life sciences companies with employees or contractors using lab hardware, software, reagents and cloud lab services.
Financial Health
HealthyHealthy
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Key facts
About 14% of the trading cohort reports turnover above £5M (17 of 120 firms) — the rest sits below that revenue band.
16% of the cohort was incorporated since 2022 (20 firms), so a sizeable share is in its first few filing cycles.
Among London users of this applicant-tracking technology, 70.0% also run a web security and performance layer and 65.0% run tag-management tooling.
Content and measurement tools sit close to the hiring workflow: 55.0% run a content-management system and 53.3% run web analytics.
SaaS is the largest tagged segment at 37.5%, followed by fintech at 15.8% and AI & machine learning at 14.2%; tags overlap, so these are not exclusive sectors.
Cloud infrastructure appears in 27.5% of stacks, while 25.0% also run privacy and consent tooling around website forms and candidate journeys.
What else do Greenhouse users run?
Share of the 120 Greenhouse-running UK companies where each technology was also detected. As of June 2026.
Who runs Greenhouse 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
£826.4K
Median UK turnover
14.2%
Above £5M turnover
20
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 240 companies, alongside financials and websites, in one Excel + CSV file.
How Greenhouse 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.
Greenhouse 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
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