BPO Companies in the UK: 1,578 Active Firms (2026)
BPO companies in the UK run outsourced customer, back-office and administrative processes for corporate and public-sector clients.
Buying centres sit mainly with operations, finance, HR, customer-service and claims teams rather than a technology-only budget. Buyers are usually mid-market and enterprise organisations, including public-sector bodies, that want repeatable process delivery with service-level monitoring, workforce cover and reporting rather than ad hoc temporary labour. Engagements tend to be sizeable people-and-process commitments, often involving transition planning, workflow tools, documented controls and ongoing performance management. Closer-fit suppliers look less like general consultancies and more like delivery organisations with trained teams, standardised procedures and enough client diversity to avoid dependence on a narrow workflow.
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The UK cohort contains 1,578 active trading companies, giving researchers a fairly concentrated list for a labour-heavy services category. Reported employment totals 8,526 people, which suggests the visible headcount footprint sits in a relatively small number of employers rather than across the whole long tail. Revenue scale is also uneven: 50 firms report turnover above £5M, while many others appear to be specialist operators, narrow-workflow providers or early commercial entrants. The market therefore looks fragmented in company count, with a thinner upper band of providers able to support larger corporate or public-sector contracts.
Exposure to rules usually follows the workflow being outsourced. Claims handling, finance operations, HR administration and document processing each bring different control expectations, while customer-support work adds conduct, quality monitoring and escalation requirements. Public-sector contracts tend to place greater weight on auditability, continuity of service and documented performance management, because the client is outsourcing execution rather than accountability. Market structure is shaped by the same point: providers compete on process consistency, staffing resilience, reporting cadence and the ability to take over live operations without service disruption, not just on hourly labour cost.
Further expansion appears likely to favour operators that can blend workforce management with workflow technology and clearer performance evidence. The long tail suggests plenty of niche supply, but enterprise and public-sector buyers tend to prefer providers that can absorb process risk, evidence compliance and maintain delivery during staffing pressure. Consolidation has been a plausible route for firms seeking broader coverage, especially where specialist delivery teams can be folded into a wider operating platform. Newer entrants may still find space in narrow workflows, though scale without disciplined service delivery looks difficult.
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
Active director count is the full Companies House board, so it can be higher than the number of names listed — we leave out nominee and formation-agent directors, who aren’t worth contacting. It’s blank for the small number of companies whose officers we haven’t fetched yet.
You’re charged per business, not per row. Where a business trades through several registered companies you get every one, and the Group Primary column marks one row per business — filter to those and the count matches your invoice. Rows sharing a website are not automatically one business: franchises and multi-site operators each count separately, and where names don’t prove a relationship we count them apart rather than guess.
1,578
Active firms
2026
50
£5M+ revenue
Companies above the threshold
418
Incorporated since 2022
Newer entrants
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Key facts
About 3% of the trading cohort reports turnover above £5M (50 of 1,578 firms) — the rest sits below that revenue band.
26% of the cohort was incorporated since 2022 (418 firms), so a sizeable share is in its first few filing cycles.
BPO providers typically run customer contact, back-office and administrative processes for corporate and public-sector clients.
Buyers retain reputational and operational risk when outsourced processes fail, so service management and compliance oversight remain central to procurement.
Public-sector and multi-site contracts tend to favour providers with governance, audit and reporting processes that can operate across locations.
The market spans high-volume service providers and narrower administrative specialists, which can make supplier comparison difficult without scale and process context.
Top UK BPO companies
Financial sub-scores
Computed from 5 filingsProvides business process outsourcing and administrative services under long‑term contracts, including customer contact centres, customer experience management, payments and collections, pensions…
Serves large public and private sector organisations, including central and local government, defence, justice and policing, health, transport, education, financial services, retail, telecoms, media…
Financial Health
StableStable · -5% CAGR over 4y
Location
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- Parseq08942815
- Parseq05815806
Financial sub-scores
Computed from 2 filingsProvides business process outsourcing services, including document and digital mailroom processing, finance and accounting support, payment and cheque processing, payroll and credit management,…
Serves large organisations and high-growth SMEs, targeting finance, operations, IT and customer experience teams in financial services, utilities, telecoms, charities, public sector, manufacturing…
Financial Health
StrongStrong
Location
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- Firstsource03999896
Financial sub-scores
Computed from 5 filingsProvides business process outsourcing and management services, including customer experience operations, collections, digital and IT services, and data analytics for sectors such as banking,…
Targets Fortune 500 and FTSE 100 enterprises and public sector bodies in healthcare, banking and financial services, communications, utilities, media, retail, edtech, technology and private equity.
Financial Health
DistressedDistressed
Location
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- ESP Group07123448
- ESP Group01599791
Financial sub-scores
Computed from 3 filingsProvides outsourced customer contact centre services, including omni‑channel customer support, multilingual assistance, sales and payment processing, and out‑of‑hours help. Also delivers back‑office…
Serves public sector organisations, government and education bodies, and private sector businesses in travel, transport, housing and property that need outsourced customer operations and support.
Financial Health
StrongStrong · Hiring · 22% CAGR over 2y
Location
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Provides business process outsourcing and digital platform services for businesses and government agencies, including customer contact management, multichannel communications, finance and procurement…
Serves large enterprises and government agencies, including public-sector bodies and commercial organisations with customer service, finance, procurement and HR functions.
Location
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- eClerx09490756
Financial sub-scores
Computed from 3 filingsProvides business process and digital operations services including customer experience management, financial services operations, financial crime compliance, data and analytics, digital marketing,…
Serves large enterprises and Fortune 500 clients in banking, financial services and insurance, telecom, media, entertainment, fashion, luxury, high-tech, manufacturing, distribution, retail and…
Financial Health
StrongStrong · Growing, Hiring · 29% CAGR over 2y
Location
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- Sigma Connected01221157
Financial sub-scores
Computed from 3 filingsProvides outsourced customer contact and business process services including customer service, debt collections, complaint handling and customer acquisition. Delivers multichannel support via phone,…
Serves UK businesses and public sector organisations needing outsourced customer contact support, with clients in energy, water, financial services, telecoms, retail/ecommerce, travel, insurance and…
Financial Health
WeakWeak · -10% CAGR over 2y
Location
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- The DDC Group02383775
Provides business process outsourcing and transformation services, including back‑office operations, customer experience support, finance and accounting processes, and data and analytics. Uses…
Serves large and global organisations across automotive, banking, energy, healthcare, insurance, retail, logistics, travel and hospitality, plus public sector bodies.
Financial Health
N/AN/A
Location
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Financial sub-scores
Computed from 4 filingsProvides technology-enabled business services including customer experience management, contact centre operations, data analytics, enterprise technology integration, and digital operations support,…
Serves large enterprises and major brands, primarily B2B, including organisations in automotive, banking and insurance, energy and utilities, government, healthcare, media, retail, technology, and…
Financial Health
WeakWeak · 0% CAGR over 3y
Location
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Provides outsourced customer experience and contact centre services for businesses, including customer care, technical support, sales and retention, collections, trust and safety, and back‑office…
Serves businesses and brands needing outsourced customer experience support, particularly enterprise and global organisations in banking, government, healthcare, insurance, manufacturing, media,…
Location
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Financial sub-scores
Computed from 5 filingsProvides customer experience outsourcing and technology platform connecting brands with distributed service partners to deliver omnichannel customer support, voice and digital interactions,…
Serves enterprise and mid-market brands needing customer experience support, particularly in retail, travel, healthcare, BFSI, energy and utilities, and gaming, plus individuals seeking…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Provides shared business services to government and public sector organisations, including HR and payroll administration, finance and accounting, procurement support, digital and information…
Serves public sector organisations, especially UK government departments and agencies, selling shared business services to HR, payroll, finance, procurement, digital and operations teams.
Location
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Financial sub-scores
Computed from 5 filingsProvides business process outsourcing services including customer support, collections, trust and safety, and back‑office administration. Also offers consulting, advanced analytics, AI‑enabled…
Targets large enterprises and public-sector organisations in banking, insurance, healthcare, government, retail/e-commerce, telecoms, travel, technology, utilities, automotive and gaming.
Financial Health
StableStable
Location
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Provides outsourced customer experience and business process services, including contact centre support, digital customer engagement, analytics, and operational support for sectors such as banking,…
Serves B2B enterprise and growth-stage brands needing customer experience and outsourcing support, especially in banking, insurance, utilities, telecoms, media, technology, retail, ecommerce, health,…
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Financial sub-scores
Computed from 5 filingsProvides multilingual business process outsourcing and customer contact services for financial and other sectors, including account management, payment processing, customer support, affordability…
Serves UK businesses across multiple sectors, especially creditors and financial services firms, plus individual account holders managing payments, affordability and support queries.
Financial Health
WeakWeak · -68% CAGR over 4y
Location
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Financial sub-scores
Computed from 2 filingsProvides outsourced revenue and debt management services including billing collections, account maintenance, debtor tracing, data enhancement, mailing and payment processing. Serves sectors such as…
Serves large UK organisations in utilities, telecoms, water, gas and electric, retail, financial services, and government/public sector departments needing outsourced revenue and debt-related…
Financial Health
HealthyHealthy · -13% CAGR over 1y
Location
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Financial sub-scores
Computed from 2 filingsProvides outsourced contact centre and customer operations services, including customer support, complaints handling, service desk and back‑office processing. Also runs inbound and outbound sales and…
Serves B2B customer operations, CX, revenue and technology leaders in utilities, energy, telecoms, home services, health, retail, e-commerce, travel, hospitality, entertainment, subscriptions and…
Financial Health
StableStable · 2% CAGR over 1y
Location
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- Transcom09774806
Financial sub-scores
Computed from 2 filingsProvides outsourced customer experience and contact centre services for businesses, including customer support, technical support, sales, trust and safety, and back‑office operations. Also offers CX…
Sells to businesses needing outsourced customer experience support, especially large brands and fast-growing scaleups. Targets buyers in e-commerce and retail, financial services, telecoms,…
Financial Health
WeakWeak · -5% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides business process outsourcing and contact centre services, including omnichannel customer support, customer experience management, and back‑office operations. Serves sectors such as…
Serves businesses in telecommunications, banking, insurance, ecommerce, edtech, logistics and energy that need outsourced contact centre or customer experience capacity across global markets.
Financial Health
StableStable · -9% CAGR over 4y
Location
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Provides outsourced contact centre services for businesses, handling inbound and outbound customer communications via phone and digital channels. Services include customer support, sales, complaint…
Sells to businesses needing outsourced contact centre support, especially customer service, sales and debt collection teams. Targets client organisations handling high customer volumes, including…
Financial Health
N/AN/A
Location
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- Kura06922296
- KuraSC476104
Provides outsourced customer contact centre and business process services, including inbound customer service, sales and retention support, customer experience transformation, analytics, contact…
Sells to businesses needing outsourced customer management and CX support, particularly in financial services, energy and utilities, healthcare and charity. Targets organisations seeking contact…
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Financial sub-scores
Computed from 5 filingsProvides outsourced business support and marketing services including document production, presentation design, research and analytics, administrative support, finance and accounting operations, and…
Sells primarily to large businesses needing outsourced business support and marketing services, especially law firms, financial services, consulting and accounting firms, retailers, pharma and life…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides outsourced customer experience and claims management services for regulated industries, particularly insurance and financial services. Offers customer support operations, claims handling,…
Serves B2B organisations in regulated markets, especially insurers, banks, financial services firms, regulatory services providers, college admissions teams, and cyber recovery organisations needing…
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides business process outsourcing and technology services, including contact centre operations, back‑office processing, IT and offshore staffing, digital marketing, data analytics, cloud…
Serves large enterprises and public sector organisations, especially in banking, finance, retail, CPG, healthcare, telecoms, media, technology and utilities.
Financial Health
DistressedDistressed · -77% CAGR over 3y
Location
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- Davies06479822
Financial sub-scores
Computed from 2 filingsProvides professional services and technology to insurance and financial services organisations, including claims management, forensic accounting, catastrophe and loss adjusting, consulting, legal…
Serves B2B clients in insurance, financial services and other highly regulated sectors, including leading and global businesses. Targets insurers, claims teams, legal and risk functions, and…
Financial Health
StrongStrong · Growing · 0% CAGR over 1y
Location
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Computed from 5 filingsProvides customer experience and contact centre outsourcing services, supplying home‑based and hybrid customer service advisors to support client operations. Uses workforce management and digital…
Serves organisations outsourcing customer experience and contact centre operations, especially businesses needing scalable home-based, hybrid or offshore advisor teams and workforce optimisation.
Financial Health
StableStable · -62% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides outsourced business process services including customer support, content moderation and trust and safety operations. Also supplies AI data annotation, model evaluation and deployment…
Serves businesses in technology, social media, gaming, financial services, healthcare, retail/ecommerce, mobility, logistics and travel, including teams responsible for customer experience, AI…
Financial Health
StrongStrong · Hiring · 50% CAGR over 4y
Location
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Provides outsourced customer service and customer experience management for retail and e‑commerce brands. Operates contact centres and remote agents delivering live answering, omnichannel customer…
Serves B2C retail and e-commerce brands, including grocery, food service, fashion, home improvement, healthcare, wellbeing, leisure and insurance businesses with large-scale customer contact needs.
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Financial sub-scores
Computed from 5 filingsProvides insurance operations and technology services including claims management, policy sales and fulfilment, contact centre operations, and development of bespoke digital insurance systems for…
Serves insurance businesses and brands offering insurance products, including insurers, brokers, MGAs and affinity partners across travel, accident and health, event, ticket refund and collision…
Financial Health
StableStable · -26% CAGR over 4y
Location
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Financial sub-scores
Computed from 2 filingsProvides business process outsourcing services including contact centre customer support, accounts receivable and debt collection, sales acquisition, data processing, quality assurance, and business…
Serves B2B organizations worldwide, including companies with customer service, sales, accounts receivable, quality assurance, data and e-commerce operations that need outsourced contact centre and…
Financial Health
StrongStrong · Profitable · -34% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides outsourced customer experience and call centre services using home‑based and hybrid customer service advisors. Offers business process outsourcing, workforce management and AI‑supported…
Serves B2B organisations and contact centre leaders needing outsourced customer experience teams, including customer service and sales operations seeking scalable home, hybrid or office-based advisor…
Financial Health
WeakWeak
Location
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Financial sub-scores
Computed from 4 filingsProvides outsourced customer experience and business process outsourcing (BPO) services. Aggregates multiple BPO providers and technology solutions, delivering customer service operations and support…
Serves enterprise and large corporate clients outsourcing customer service, especially in facilities management, emergency incident handling, e-commerce, legal and financial services, local…
Financial Health
StableStable · -68% CAGR over 3y
Location
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Financial sub-scores
Computed from 5 filingsProvides business process outsourcing including finance and accounting services, outsourced recruitment support, HR, marketing and IT support. Develops automation and analytics software and offers…
Serves enterprise organisations and public sector bodies across recruitment, property management, accounting and audit, manufacturing, retail, CPG, utilities, energy, hospitality, higher education,…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides outsourced customer experience and call centre services for businesses, combining human agents and AI automation to handle customer enquiries, order tracking, scheduling, document capture,…
Sells to businesses, particularly global brands needing outsourced customer experience operations. Targets organisations with high-volume, regulated, complex or sensitive customer interactions,…
Financial Health
HealthyHealthy · Hiring · 26% CAGR over 4y
Location
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Computed from 5 filingsProvides business process outsourcing and management services focused on accounting and finance operations. Offers procure‑to‑pay assessments, workflow automation, and operational support to help…
Serves businesses and public-sector organisations seeking BPM/BPO support, across manufacturing, energy, agriculture, food and beverage, insurance, banking, utilities, logistics, telecoms, IT,…
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 4y
Location
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Computed from 4 filingsProvides outsourced contact centre and business process services, including omnichannel customer support, complaints management, debt collection, and customer lifecycle management. Also offers…
Serves businesses and brands seeking outsourced customer contact operations, from tactical campaigns to full customer lifecycle support, including organisations needing complaints handling,…
Financial Health
StableStable · 0% CAGR over 3y
Location
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Financial sub-scores
Computed from 5 filingsProvides outsourced credit management and order‑to‑cash services including receivables management, debt recovery, dunning letters and call centre support. Also supplies back‑office business process…
Serves B2B, public-sector and not-for-profit organisations, including SMEs and large enterprises, local authorities, insolvency practitioners, and legal or solicitor firms.
Financial Health
StrongStrong · Profitable, Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides information technology and business process services including digital transformation consulting, cloud migration and operations, data and analytics, AI solutions, application development,…
Serves enterprise and public-sector clients globally, with a focus on communications, banking and financial services, government, healthcare and retail organisations seeking technology-led…
Financial Health
StableStable · -67% CAGR over 4y
Location
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Provides business process outsourcing and digital services including customer support, trust and safety moderation, e‑commerce operations, web and app integration, online marketing, analytics, IT…
Serves B2B and public-sector clients across global and Asian markets, including automotive, manufacturing, consumer electronics, finance, insurance, digital services, media, entertainment, FMCG,…
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Financial sub-scores
Computed from 3 filingsProvides outsourced customer contact and telemarketing services including inbound and outbound call handling, customer support, digital marketing and AI-enabled customer experience management. Also…
Serves large organisations and public sector bodies worldwide, including automotive, travel, financial services, insurance, healthcare, retail/e-commerce, telecoms, media, technology and utilities.
Financial Health
HealthyHealthy · Hiring · 29% CAGR over 2y
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Financial sub-scores
Computed from 3 filingsProvides investor record‑keeping, transfer agency and business process outsourcing services for asset managers and financial institutions. Offers technology platforms and data management to support…
Serves B2B financial institutions, particularly asset managers and investment fund providers, including large established firms and emerging companies operating in regulated investment markets.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 2y
Location
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Computed from 5 filingsProvides IT and software services including application maintenance and support, cloud migration, infrastructure management, digital transformation, AI consulting, quality engineering and testing,…
Serves B2B enterprise clients across healthcare, manufacturing, retail and e-commerce, BFSI, media, marketing and advertising, travel, hospitality and hi-tech sectors seeking technology, operations…
Financial Health
WeakWeak · -78% CAGR over 4y
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Computed from 5 filingsProvides outsourced services to pharmaceutical and life sciences companies, including medical and scientific communications, regulatory submission support, pharmacovigilance monitoring, patient and…
Serves life sciences and healthcare companies, especially pharmaceutical and biotech teams, seeking to engage HCPs, patients, caregivers and consumers across global healthcare markets.
Financial Health
WeakWeak · -56% CAGR over 5y
Location
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Computed from 5 filingsProvides outsourced customer support, technical support, and content moderation services. Combines human agents and AI tools to deliver trust and safety monitoring, community and social media…
Serves B2B clients in gaming, travel and tourism, e-commerce and retail, technology, crypto/NFT and metaverse sectors, particularly brands with online communities, digital products or multilingual…
Financial Health
WeakWeak · -76% CAGR over 4y
Location
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Computed from 5 filingsProvides customer experience transformation services, including outsourced contact centre teams, CX self‑service tools, admissions processing, and patient communication services, supporting…
Serves public sector bodies, charities, education providers, transport and mobility operators, and retail organisations seeking customer experience support, outsourced teams, admissions services, and…
Financial Health
DistressedDistressed · -11% CAGR over 4y
Location
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Computed from 5 filingsProvides AI and intelligent automation solutions for contact centres and internal business operations. Develops automation tools, deploys AI-driven customer service technology, and offers outsourced…
Serves customer service and operations leaders in highly regulated private-sector organisations, contact centres, utilities, local authorities and wider UK public sector bodies.
Financial Health
StableStable · Hiring · 44% CAGR over 5y
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- Datagraphic04528786
Financial sub-scores
Computed from 5 filingsProvides document automation and data processing services including multichannel customer and employee communications, hybrid mail printing and fulfilment, inbound mail digitisation and archiving,…
Serves B2B organisations, particularly finance, payroll, HR, operations, customer service and IT teams needing high-volume customer, employee and supplier communications across print and digital…
Financial Health
StrongStrong · Growing · 1% CAGR over 4y
Location
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Computed from 5 filingsProvides outsourced customer support and back‑office services for fintech and payment companies, including multilingual voice, live chat, email and social media support, plus operational processing…
Serves B2B fintech and financial services firms, especially payments providers such as issuers, acquirers, payment processors, and rewards or loyalty programme operators.
Financial Health
StableStable · Hiring · 58% CAGR over 4y
Location
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Computed from 5 filingsProvides customer experience and business process outsourcing services, including contact centre operations, sales support, and workforce optimisation. Uses home‑based and hybrid agents supported by…
Serves organisations seeking outsourced customer experience and contact centre support, particularly teams needing flexible, scalable home, hybrid, nearshore or offshore service delivery and…
Financial Health
DistressedDistressed · -78% CAGR over 4y
Location
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Computed from 5 filingsProvides document scanning, data capture and processing services, including form and survey processing, data entry and validation, web scraping, database migration, and back‑office outsourcing such…
Serves UK businesses and public-sector organisations needing outsourced document, data and back-office operations, including teams handling applications, surveys, claims, KYC/AML checks, records,…
Financial Health
StableStable · -68% CAGR over 4y
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How UK BPO companies work and how to sell to them
What they do
Business-process outsourcing providers earn revenue by taking responsibility for defined operational workstreams, usually under managed-service contracts rather than one-off advisory projects. Pricing may be built around staffed capacity, cases handled, transactions processed, service credits, or a fixed monthly fee with transition charges at the start. The service shape is part labour model, part operating system: trained teams, workflow documentation, quality checks, reporting packs and escalation routes. Margins depend on utilisation, staff churn, process repeatability and the provider’s ability to standardise work without losing the client-specific controls that large buyers expect.
Who they sell to
Most providers sell to mid-market, enterprise and public-sector buyers with repeatable back-office or customer-facing workloads. The commercial sponsor is often a COO, CFO, customer-operations director, HR director, head of claims or shared-services leader, with procurement, legal, information security and finance involved before award. Contract values are usually treated as operating-budget commitments, so sales cycles tend to run through discovery, process mapping, risk review, procurement challenge and transition planning. Direct sales is common for private-sector work, while public bodies and larger corporates often use formal tenders, approved supplier routes or outsourcing frameworks.
What they buy
BPO firms tend to spend on systems and services that improve utilisation, evidence service quality and reduce manual handling. Common categories include workforce management, HR and payroll, recruitment, learning systems, quality assurance, workflow automation, document processing, contact-centre software, case management, CRM, ticketing, analytics and management reporting. Security, identity management, device management, cloud hosting, backup and audit support also matter where outsourced teams handle client records or regulated workflows. Outside software, many buy employment law advice, contract support, insurance, facilities, screening, training content and specialist recruitment for operations managers, team leaders and compliance roles.
Why and how to sell to them
Buying triggers often appear when a provider wins a larger client, takes over a new workflow, loses margin through rework, or faces pressure on service levels, attrition and transition speed. Leadership changes, tender activity, new delivery sites, acquisitions and heavier client audit demands can also create openings. Sellers tend to get further when they frame the pitch around cost-to-serve, evidence for client reporting, faster onboarding, fewer handoffs, better exception management or reduced operational risk. Generic productivity claims land less well than a workflow-specific argument that fits how outsourced teams are staffed, measured and penalised.
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.
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Frequently asked questions
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