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IT Integration Companies in Nottingham: 34 Active Firms (2026)
IT integration companies connect software, data, networks and business systems for organisations in and around Nottingham.
Buying centres tend to sit with IT directors, finance operations, data teams and programme leads rather than under a narrow software-owner budget. Work is usually project-led: application connectivity, data migration, infrastructure handover and managed implementation around existing enterprise estates. The customer base is mixed, with owner-managed businesses, mid-market employers and public-sector bodies all needing integrations that survive procurement scrutiny, legacy systems and support handover once the initial build is complete.
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Nottingham has 34 actively trading IT integration companies, making the local cohort fairly small and service-led rather than platform-led. The employment footprint is 496 reported roles, which points to delivery capacity spread across consultancies rather than concentrated in a handful of large software houses. Few have reached higher turnover bands, so buyers are likely to find more implementation partners, support providers and specialist technical teams than large prime contractors.
Integration work is governed less by a dedicated sector regulator than by the rulebooks attached to clients' systems and data. Projects that touch personal information bring GDPR and ICO expectations into scope; payment, healthcare or local authority environments add their own assurance requirements. For Nottingham suppliers, the commercial market structure is therefore shaped by buyer risk controls: access management, audit trails, change control, procurement evidence and continuity planning often matter as much as the integration build itself.
Demand appears tied to replacement cycles, cloud migration clean-up and the need to make older applications work with newer reporting and service-management layers. The cohort tends to suit incremental integration programmes rather than very large outsourcing deals, which may keep acquisition interest selective. Skills shortages around architecture, security and project governance are likely to favour firms that can document delivery methods clearly, but many will still compete on trust, local relationships and retained support work.
34
Active firms
2026
1
Above £5M
annual revenue
2
Since 2022
incorporations
Key facts
About 2% of the trading cohort reports turnover above £5M (1 of 34 firms) — the rest sits below that revenue band.
5% of the cohort was incorporated since 2022 (2 firms), so a sizeable share is in its first few filing cycles.
IT integration work connects software, data, networks and business systems for organisations that need existing tools to work together.
Nottingham demand tends to sit between packaged software, infrastructure support and operational change, rather than pure product development.
Delivery models appear split between staffed implementation teams and project-led or subcontracted integration work.
Top Nottingham IT Integration companies
Synarc
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides IT infrastructure and managed services including cloud infrastructure setup and migration, data centre deployment and management, cybersecurity solutions, enterprise networking, system…
Serves businesses and organisations needing enterprise IT infrastructure support, including cloud, data centre, cybersecurity, managed services, system integration and digital transformation teams.
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
Little Fish
Provides managed IT services, cyber security, digital transformation consulting, and data and AI solutions. Offers service desk support, cloud migration and optimisation, infrastructure management,…
Serves public-sector bodies and mid-to-large commercial organisations, including healthcare, local and central government, social housing, charities, energy, finance, manufacturing, construction,…
Location
Integrated Management Solutions (Global) Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides consulting, development and managed services for IBM i (AS/400) systems and Infor ERP platforms including System21 Aurora. Services include RPG software development, system upgrades,…
Serves businesses using IBM i/AS400 and ERP platforms such as Infor System21, LN, LX, XA, JD Edwards, JDA and PRMS, across sectors including finance, warehousing, logistics and manufacturing.
Financial Health
StableStable · Hiring · 9% CAGR over 4y
Location
ROUNDWORKS IT LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides managed IT support and outsourced IT services for businesses, including network monitoring, cybersecurity, cloud infrastructure, data backup, disaster recovery, business telephony,…
Serves businesses of all types and sizes, from small to large operations, seeking outsourced IT support across Nottingham, Mansfield, Derby and the wider East Midlands.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
YOUR IT DEPARTMENT LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides managed IT support and outsourced IT services for businesses, including helpdesk support, network monitoring, cybersecurity, cloud solutions, Microsoft 365 management, IT projects,…
Serves East Midlands businesses and UK organisations, typically SMEs with office-based teams, including firms needing outsourced IT support or extra capacity for internal IT staff.
Financial Health
StableStable · Hiring · 8% CAGR over 2y
Location
SERVITA MIDDLE EAST LIMITED (FORMERLY SERVITA CONSULTING LIMITED)
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides digital transformation consulting and technology services including strategy and innovation, programme and project delivery, organisational design, enterprise architecture, cybersecurity,…
Sells to SMEs, enterprises, government and public sector bodies seeking digital transformation, with sector focus on healthcare, professional services, TMT, financial services, energy, consumer…
Financial Health
DistressedDistressed
Location
Vigence Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides business and technology consulting focused on Microsoft Dynamics 365 and Power Platform. Designs and implements CRM systems, cloud business applications, and workflow automation, with…
Serves UK businesses of all sizes, particularly teams responsible for sales, marketing, customer service and field service operations seeking Microsoft Dynamics 365 and business application support.
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 4y
Location
HUNTERS SOLUTIONS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies service management software for scheduling jobs, assets and field teams. Provides IT support, software development, EPOS systems, Sage integrations, cloud services, and IT…
Serves small and medium businesses, especially field-service teams, Sage users, and retail or hospitality operators such as restaurants, cafés, nightclubs, fashion boutiques and convenience stores.
Financial Health
StableStable · 0% CAGR over 4y
Location
PERFORMANCE NETWORKS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides managed WiFi and network infrastructure services for businesses, including wireless network design and installation, site surveys and heatmapping, SD-WAN and fibre connectivity, network…
Serves businesses and public-sector organisations, including warehouses, manufacturers, airports, construction sites, offices, retailers, schools, universities, hospitality venues, care providers and…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
Trisoft Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops healthcare management software used by hospitals to plan and manage operating theatre and sterile services activities. Also provides data cabling installation, network connectivity and IT…
Serves NHS trusts and hospital operating theatre teams, alongside UK businesses requiring network/data cabling and IT support. Targets healthcare organisations, facilities/operations managers and…
Financial Health
DistressedDistressed · -14% CAGR over 2y
Location
E-BIS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides design and installation of converged IP and IT infrastructure systems, including networking, structured cabling, IP security, audio‑visual and video conferencing solutions, as well as…
Serves businesses and public sector organisations of all sizes across commercial, education, government, healthcare, manufacturing, retail and utilities sectors.
Financial Health
DistressedDistressed · -8% CAGR over 4y
Location
Virtigon Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides IT infrastructure consulting focused on Nutanix platforms, including implementation, deployment and training services. Supports organisations adopting hyperconverged and enterprise cloud…
Serves businesses across EMEA, particularly IT and technology teams seeking cloud, infrastructure, cybersecurity and automation support. Targets organisations undertaking digital transformation,…
Financial Health
WeakWeak · -6% CAGR over 5y
Location
Solutions for Accounting Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies, implements and supports accounting and business management software including Sage Intacct, Sage 200 and Sage 50. Provides CRM and payroll systems, software customisation, reporting tools,…
Serves UK businesses and not-for-profit/education organisations, especially growing or multi-entity finance teams in manufacturing, SaaS, wholesale/distribution, construction, professional services,…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
Budgeting Solutions Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides budgeting and forecasting software solutions and consultancy for finance teams. Implements and supports IBM Planning Analytics and Cognos tools, offering system evaluation, configuration,…
Sells to finance teams and finance professionals in organisations using budgeting, forecasting and planning software, particularly across retail, hospitality, manufacturing, public services, travel…
Financial Health
StrongStrong · Growing, Hiring · 34% CAGR over 2y
Location
Burconix Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and supports IT network infrastructure for educational institutions. Provides cloud connectivity tools integrating OneDrive, SharePoint and Teams, network management and monitoring…
Serves educational establishments and schools throughout the UK, targeting school IT departments and administrators responsible for managing Microsoft Windows networks and core IT infrastructure.
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
Frogbox IT Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides managed IT support and consultancy for businesses and education organisations, including hardware and software procurement, Microsoft 365 licensing, network and wireless setup, cybersecurity…
Sells to schools and other education providers, as well as businesses needing managed IT support. Targets organisations buying IT consultancy, hardware, Microsoft licensing, security, cloud, backup,…
Financial Health
StableStable · Hiring · 11% CAGR over 4y
Location
PRIM Solutions Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides IT consulting and managed services including ERP and enterprise performance management implementation, business intelligence and data management, application development, enterprise mobile…
Serves enterprises and public-sector organisations, including healthcare providers, insurers, financial firms, energy and infrastructure companies, county government bodies, and start-ups or…
Financial Health
HealthyHealthy · -24% CAGR over 4y
Location
Trajectory Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides digital transformation consulting and enterprise systems implementation, specialising in Salesforce and NetSuite. Delivers CRM, ERP and e‑commerce solutions, systems integration, AI…
Serves B2B clients including fast-growing companies, private equity firms and portfolio companies, and leaders in SaaS/technology, financial and professional services, manufacturing, distribution,…
Financial Health
WeakWeak · 0% CAGR over 3y
Location
Utilize Solutions Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides managed IT services, cyber security audits, cloud infrastructure support, and IT consultancy for businesses. Also implements and supports Sage business software, unified communications…
Serves B2B organisations needing managed IT, cyber security, cloud, communications and Sage finance systems, including businesses seeking outsourced IT support, digital transformation and…
Financial Health
DistressedDistressed · -29% CAGR over 2y
Location
MASON INFOTECH LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides managed IT services for businesses, including IT support and helpdesk, cybersecurity, cloud platforms such as Microsoft 365 and Azure, infrastructure management, data backup, and IT project…
Serves B2B organisations in Nottingham and worldwide, with a stated focus on firms in the built environment, including architecture, engineering, construction and property companies.
Financial Health
StableStable · 0% CAGR over 4y
Location
Bubble IT Solutions Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides managed IT support and outsourced IT services for businesses, including cloud computing and hosting, cybersecurity, cloud backup and email security, IT consultancy, server installations,…
Serves UK businesses, with emphasis on Nottingham and the East Midlands, from small start-ups to large enterprises, including firms outsourcing IT, supplementing internal IT teams, or supporting…
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 2y
Location
Osiris Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies, installs and maintains integrated IT and communications infrastructure for businesses and organisations, including structured cabling, computer networking, audio‑visual systems and…
Sells to businesses and organisations of all sizes, including large enterprises and public sector bodies. Serves sectors such as higher education, telecommunications, aerospace, engineering and…
Financial Health
WeakWeak · -4% CAGR over 4y
Location
Xynomix Limited
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsProvides database consultancy and managed services for Oracle and Microsoft SQL Server environments, including monitoring, patching, upgrades, migrations, performance analysis, security, backup and…
Serves UK businesses and public sector organisations using Oracle or SQL Server, including finance, healthcare, logistics, manufacturing, professional services, retail, travel and transport, plus…
Financial Health
StableStable · -6% CAGR over 3y
Location
TECHNOSOFT IT SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides IT consultancy and managed services including data centre management, enterprise network monitoring, database administration, cloud support, endpoint security and end‑user device management,…
Serves B2B clients, especially industrial and manufacturing enterprises with mission-critical sites, plant operations, and distributed employee IT environments requiring 24/7 technical support and…
Financial Health
HealthyHealthy · -12% CAGR over 4y
Location
Zentrum Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides information technology consulting and services including application development and maintenance, ERP and CRM implementation, business intelligence and analytics, cloud and mobile solutions,…
Serves B2B organisations, especially in pharma and life sciences, education, finance and healthcare, targeting executives, IT departments and project teams responsible for enterprise systems, data,…
Financial Health
StableStable · -5% CAGR over 4y
Location
Octavian IT Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides managed IT services and project delivery for organisations, including IT support, wireless network deployment, server infrastructure, cybersecurity, backup and disaster recovery, cloud…
Sells to businesses and organisations needing managed IT support, especially corporate environments and enterprises. Serves organisations of all sizes across multiple industries, including clients…
Financial Health
HealthyHealthy · -3% CAGR over 4y
Location
CONVISTA CONSULTING LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides consulting and technology services for digital transformation, including SAP implementation and support, data analytics and AI, software development and testing, process analysis and…
Serves large enterprises and public-sector organisations undergoing digital transformation, especially in insurance, manufacturing, healthcare/public health and energy/utilities. Targets CIOs,…
Financial Health
WeakWeak · -7% CAGR over 2y
Location
ONEZO LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides managed IT services for businesses, including IT support, telecoms systems, network connectivity, cloud hosting and backup, IT procurement, and managed print services. Offers bundled service…
Sells to businesses needing outsourced IT, telecoms, connectivity, cloud, procurement and print support, including firms seeking bundled managed services and dedicated account management in the Derby…
Financial Health
HealthyHealthy · Hiring · 20% CAGR over 5y
Location
Weigandt Consulting Ltd.
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides IT consulting and software engineering services for retail businesses, including legacy system modernisation, cloud and packaged application implementation, application management, and…
Serves retail businesses and global retail leaders across different verticals and scales, including teams responsible for IT strategy, inventory, customer experience, supply chain and cloud…
Financial Health
DistressedDistressed
Location
Breeze (IT) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops bespoke software, mobile applications and database systems for businesses. Provides database design, business intelligence and management reporting tools, and integrates business systems and…
Serves organisations across the UK, including housing associations, agriculture and farming businesses, retail and packaging firms, sports and leisure operators, research bodies, charities, and other…
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
Fonlutions Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides data and business intelligence consulting including data engineering, analytics, modelling and visualisation. Develops customised software and integration solutions, and advises ports and…
Serves B2B clients, including blue-chip and FTSE 100 companies in telecommunications, media, shipping terminals, logistics, ports and FMCG, targeting teams responsible for operations, data, analytics…
Financial Health
StrongStrong · Hiring · 41% CAGR over 2y
Location
Provision IT Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides IT support and consulting services for businesses, including managed help desk teams, network and infrastructure implementation, cybersecurity monitoring, software and hardware provision,…
Serves small and medium-sized businesses needing outsourced, insourced or hybrid IT capacity, including firms with existing internal IT teams that need support, upskilling, advisory input or…
Financial Health
StableStable · -2% CAGR over 5y
Location
Wytech Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides outsourced IT support and managed IT services for businesses, including helpdesk support, cybersecurity, cloud services, VoIP telephone systems, network connectivity, cabling, and backup and…
Serves SMEs and growing businesses in Derby and the Midlands, including financial services firms, business parks and other organisations needing outsourced IT, telecoms and cyber support.
Financial Health
WeakWeak · -4% CAGR over 4y
Location
Intelligent Decisioning Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides intranet and document management solutions based on Microsoft 365, SharePoint and Teams. Develops software such as docCentrum and MegaNav and offers implementation, digital transformation…
Serves UK businesses and public-sector organisations, including NHS bodies, housing associations and construction firms, typically teams using Microsoft 365, SharePoint and Teams environments.
Financial Health
StableStable · -2% CAGR over 4y
Location
ADVANCED IT SERVICES NOTTINGHAM LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides IT services for schools, academies and multi‑academy trusts, including managed IT support, network infrastructure, broadband connectivity, cloud hosting, cybersecurity, data backup and…
Serves primary and secondary schools, independent schools, colleges, academies and multi-academy trusts, selling to education leaders, IT administrators, teachers and school business teams.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
Liberate It Services Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides managed IT support services for businesses, including network support, cybersecurity, proactive monitoring, antivirus and email filtering, mobile device management, hardware and software…
Serves businesses needing outsourced IT support, including legal firms, solicitors, accountants and manufacturers, with messaging aimed at organisations reliant on secure networks, devices and email.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
MOZAIC UK LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides management and technology consulting focused on organisational operating models and digital service management. Advises on strategy, workflow and service delivery design, and supports…
Serves large enterprises and public sector organisations across legal, professional services, healthcare, energy, defence, engineering, higher education and financial services.
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 4y
Location
Phoenix Network Communications Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and supports building communications and IT infrastructure, including structured cabling, fibre optic networks, comms rooms, audio‑visual systems, IP CCTV, telephone systems,…
Serves organisations of all sizes across sectors, including commercial property developers, entertainment venues, sports facilities, student accommodation operators, and public sector emergency…
Financial Health
HealthyHealthy · -3% CAGR over 4y
Location
XMA
Provides IT infrastructure products and services including hardware supply, software and cloud solutions, cybersecurity, and managed IT services. Offers consultancy, device management, managed print,…
Serves UK public sector organisations, education providers, healthcare and social care bodies, defence, blue light services, local and central government, and corporate businesses needing IT…
Location
MYHCM LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides management consulting, CRM package implementation, and data analytics services. Supports organisations with customer journey analysis, deployment of CRM systems, and analytics to improve…
Serves B2B organisations seeking to improve customer experience, CRM, sales productivity and customer-care operations, including teams responsible for digital strategy, customer journeys and…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
Location
CWCS MANAGED HOSTING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides managed cloud hosting, dedicated servers, private cloud environments, and colocation services. Offers server management, migration, security tools, connectivity, and data centre…
Serves businesses and IT teams needing UK-based managed hosting, cloud infrastructure, dedicated servers, colocation and security support, including organisations with compliance, scalability or…
Financial Health
StableStable
Location
SUPREME BAY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides managed web hosting and infrastructure services including cloud servers, private cloud hosting, dedicated and bare‑metal servers, and data centre colocation. Also offers server management,…
Serves B2B organisations, IT teams and digital businesses needing managed hosting, cloud or dedicated server infrastructure, colocation and security support, with emphasis on UK-based infrastructure…
Financial Health
StableStable
Location
Promenta Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops SAP‑integrated software for process automation, workflow management and compliance. Provides tools for journal entry approvals and master data management covering vendors, customers,…
Serves large enterprises and complex organizations running SAP S/4HANA or ECC, particularly finance, master data management and compliance teams across multiple sectors.
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
Location
XMA
Supplies IT hardware and software and provides technology solutions including cloud services, cybersecurity, device management, managed print, service desk support, configuration and deployment, and…
Serves UK public sector bodies and corporate organisations, including central and local government, blue light, defence, health and social care, universities, colleges, schools and financial services…
Financial Health
Insufficient historyInsufficient history
Location
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How Nottingham IT Integration companies work and how to sell to them
What they do
Revenue usually comes from scoped implementation projects, change requests and retained support, rather than from pure software subscriptions. Nottingham IT integration firms typically sell technical services: connecting business applications, moving information between systems, configuring infrastructure handovers and documenting support processes. Pricing often blends fixed-scope statements of work with day-rate delivery for architecture, engineering and testing. Smaller engagements may start as discovery or troubleshooting, while larger programmes can run through staged design, build, test and handover phases. Managed support gives these firms recurring income after the initial integration work has been accepted.
Who they sell to
Most sell to SMEs, mid-market employers, local public-sector organisations and larger groups with regional operations. The usual buyers are IT directors, heads of operations, finance systems owners, programme managers and procurement teams, with security or data-protection roles brought in when access and personal information are involved. Lower-risk work can be won through referrals, retained supplier relationships or direct sales, but larger projects tend to need a proposal, statement of work, security questionnaire and commercial sign-off. Public-sector buyers are more likely to require formal tendering, evidence of delivery method and post-go-live support commitments.
What they buy
IT integration firms tend to spend on tools and services that help them scope, deliver and support client work. Common categories include CRM, project accounting, professional-services automation, resource planning, ticketing, documentation, testing, monitoring, observability, endpoint security, identity and access management, backup, cloud infrastructure and collaboration software. They also buy specialist insurance, contract review, accounting, recruitment and technical training, particularly where client projects involve regulated information or long support obligations. Sellers with offers around utilisation, margin control, audit evidence, vulnerability management or faster handover may find a clearer fit than broad productivity messages.
Why and how to sell to them
Buyers in this segment tend to evaluate suppliers when project delivery becomes harder to manage by spreadsheet, when support tickets start to sit alongside implementation work, or when a larger client asks for better assurance evidence. Hiring delivery managers, security specialists or architects can also signal a move from ad hoc technical work to more repeatable operating processes. Outbound angles should be practical: reduce rework during handover, improve visibility of project margin, make GDPR and ICO evidence easier to assemble, or help technical teams document decisions before clients ask for them.
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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