IT Reseller Companies in London: 351 Active Firms (2026)
IT resellers in London source, configure and support business hardware, software licensing and managed infrastructure for organisations across the capital.
Buying centres tend to sit with IT directors, procurement teams and finance leaders, depending on whether the need is a hardware refresh, software licensing, cloud migration or managed support. London demand is mainly business-to-business and commercial, with resellers acting as channel partners between technology manufacturers, software publishers and end customers. Engagements range from transactional procurement to multi-site implementation and support, so the model usually combines consultative sales, configuration, fulfilment and service-desk functions rather than simple box-shifting.
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London has 351 actively trading IT resellers in this list, a finite local cohort rather than a broad population of occasional traders. Reported headcount totals 1,536 people, so the employment footprint is visible without looking like a labour-heavy industry. The shape is consistent with resellers that rely on sales, procurement, implementation and support teams, while subcontracting, partner delivery and remote infrastructure platforms carry part of the operational load.
Channel businesses in this segment are shaped more by contract terms than by a dedicated sector licence. Compliance pressure comes through customer due diligence: software licence management, asset tracking, cyber controls, data handling, insurance and service-level commitments all sit close to revenue. For London resellers selling into regulated customers, the reseller may not be the regulated entity, but it often has to evidence access controls, audit trails and continuity planning. Manufacturer and distributor accreditation also matters because margin, rebate treatment and support escalation can depend on maintaining partner status.
Future competition appears likely to favour operators that can move beyond transactional fulfilment into recurring managed support, cloud administration and lifecycle services. Pure resale tends to be exposed to margin pressure, especially where customers can compare hardware and licence pricing directly. Larger specialists may keep buying smaller books of managed-service work, but integration risk is not trivial: service desks, vendor authorisations and client knowledge are hard to merge cleanly. The scarcer asset is trusted account ownership with repeat commercial buyers, not catalogue breadth.
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
351
Active firms
2026
31
Above £5M
Revenue threshold
28
Since 2022
Newer incorporations
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Key facts
About 8% of the trading cohort reports turnover above £5M (31 of 351 firms) — the rest sits below that revenue band.
7% of the cohort was incorporated since 2022 (28 firms), so a sizeable share is in its first few filing cycles.
London IT resellers sit between buyers and the technology supply chain, packaging procurement, configuration and support into one service model.
Common offers cover business hardware, software licensing and managed infrastructure rather than standalone early-stage software products.
The buyer base is mainly B2B, with services aimed at organisations that do not want to manage separate procurement, implementation and support layers.
Larger operators tend to combine resale activity with support-led service work, which can make the upper end of the market more concentrated than the long tail.
Top London IT Reseller companies
Financial sub-scores
Computed from 4 filingsProvides managed IT services including cybersecurity monitoring, cloud infrastructure management, unified communications, backup and disaster recovery, and IT support. Also supplies hardware and…
Serves established businesses and schools across London and its boroughs, including organisations with remote staff and compliance, data privacy and security-focused technology requirements.
Financial Health
StrongStrong
Location
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Computed from 3 filingsProvides managed IT services and consultancy, including IT support, infrastructure management, cybersecurity and compliance. Implements and supports cloud platforms such as Microsoft 365 and Azure,…
Serves B2B customers: small businesses, medium-sized companies and enterprises in London, the Home Counties and across the UK, including teams responsible for IT strategy, compliance, cloud and…
Financial Health
DistressedDistressed · -15% CAGR over 2y
Location
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Computed from 5 filingsProvides managed IT support and outsourcing services for businesses, including network design, 24/7 monitoring, cloud infrastructure, Microsoft 365 licensing, cybersecurity, IT consultancy, and…
Serves UK businesses, particularly London-based start-ups with 2–15 users and SMEs with 30–500 users, including firms needing outsourced or extended IT teams.
Financial Health
HealthyHealthy · -3% CAGR over 4y
Location
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Computed from 3 filingsProvides IT infrastructure solutions and systems integration services. Sells computer hardware, software, networking equipment, and peripherals, and offers software licensing, technology procurement,…
Serves commercial businesses and public sector organisations, targeting IT, procurement and technology teams that buy and manage enterprise hardware, software, cloud and infrastructure technology.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides outsourced IT services including technical support, managed networks, cybersecurity, cloud infrastructure, remote monitoring, help desk support, disaster recovery planning, and hardware and…
Serves London businesses needing outsourced IT, connectivity and cybersecurity, including SMEs, enterprises, real estate organisations, public sector bodies and channel partners.
Financial Health
DistressedDistressed · -45% CAGR over 4y
Location
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Computed from 5 filingsProvides managed IT services for businesses, including technical support, IT consultancy, hardware supply, network and infrastructure management, cybersecurity, backup and disaster recovery,…
Serves B2B customers, primarily London-based SMEs and larger multi-site organisations, including retail, property, fashion and legal services firms that need outsourced IT, connectivity and…
Financial Health
StrongStrong · Growing, Hiring · 25% CAGR over 4y
Location
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Computed from 5 filingsProvides IT consultancy and infrastructure services including enterprise networking, cloud and data centre solutions, and cybersecurity. Supplies and deploys hardware such as servers, storage,…
Serves UK organisations and IT teams needing enterprise infrastructure, networking, cybersecurity, cloud and hardware procurement support, including businesses managing data centres, endpoints and…
Financial Health
StrongStrong · Hiring · 29% CAGR over 4y
Location
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Computed from 4 filingsProvides IT support and managed services for organisations, including troubleshooting, system maintenance and network support. Supplies computer hardware and software, assists with office IT…
Sells to organisations of any size, primarily businesses in Greater London and the M25, including law firms, consultancies, insurers and charities. Also serves ICT managers and office-based teams…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
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Computed from 4 filingsProvides IT products and services for corporate and public sector organisations, including technology procurement, cloud migration, connectivity and telephony solutions, IT support, consultancy,…
Sells to corporate and public-sector organisations, especially IT departments and procurement teams in mid-market and enterprise firms with multi-site or global workforces, including sectors such as…
Financial Health
StrongStrong · Hiring · 38% CAGR over 3y
Location
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Computed from 5 filingsProvides IT solutions and services including workplace technology lifecycle management, IT procurement, audiovisual systems, data centre and networking infrastructure, cybersecurity, managed print,…
Sells to B2B organisations, particularly IT, operations and procurement teams managing workplace technology estates across single or multiple UK sites and offices in Europe.
Financial Health
StableStable · -72% CAGR over 4y
Location
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Computed from 5 filingsProvides managed IT services including cloud infrastructure, cybersecurity, networking, datacentre and workspace solutions. Delivers IT support, lifecycle management, telecommunications and…
Serves UK businesses across multiple industries, targeting organisations needing outsourced IT support and account-managed technology procurement, including teams responsible for security, cloud,…
Financial Health
HealthyHealthy · Hiring · 46% CAGR over 4y
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Computed from 5 filingsProvides managed IT support and technology consultancy for businesses and schools, including cybersecurity, cloud services, AI and automation, backup and business continuity, communications, Wi‑Fi…
Serves growing businesses and schools, particularly organisations with evolving technology needs, underused software spend or rigid systems, looking for an external long-term tech partner.
Financial Health
StableStable · Hiring · 4% CAGR over 4y
Location
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Computed from 4 filingsProvides managed IT support and consultancy for businesses, including remote and onsite helpdesk services, cybersecurity, cloud solutions, backup and disaster recovery, Microsoft 365 and Google…
Serves London-based SMEs and SMBs across diverse industries, including charities and non-profits, as well as in-house IT departments supporting office, hybrid or remote workforces.
Financial Health
StableStable · Hiring · 4% CAGR over 3y
Location
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Computed from 4 filingsProvides IT infrastructure and cloud services including multi‑cloud architecture, data centre systems, networking, cybersecurity, and collaboration platforms. Offers consulting, deployment, managed…
Serves enterprise businesses and government organisations, targeting IT leaders, infrastructure teams and technology procurement buyers across commercial and public-sector environments.
Financial Health
HealthyHealthy
Location
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Computed from 4 filingsProvides managed IT support and consultancy for small and medium-sized organisations, including cloud hosting from its own data centre, IT infrastructure management, cybersecurity, connectivity,…
Serves small and medium-sized businesses in London, including professional services, travel, education and financial firms seeking outsourced IT support.
Financial Health
WeakWeak · -7% CAGR over 3y
Location
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Computed from 5 filingsSupplies networking and IT hardware and provides network transformation services, including SDN and NFV enablement, cloud and MPLS connectivity, fibre and IP transit links, network deployment and…
Sells to businesses needing network, cloud and data centre infrastructure, including telecoms and IT teams buying connectivity, colocation and networking hardware. Also serves online buyers of…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
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Computed from 4 filingsProvides IT consultancy and technology procurement services, including hardware and software supply, IT strategy development, infrastructure optimisation, project management, and engineer support for…
Serves UK businesses in office, retail and hospitality sectors, targeting organisations that need IT consultancy, hardware and software procurement, project support, and engineer coverage.
Financial Health
HealthyHealthy · -7% CAGR over 3y
Location
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Computed from 5 filingsProvides IT hardware and software from global brands, along with consulting, managed IT services, cloud networking solutions, and project management. Also supports IT infrastructure design,…
Serves B2B customers, particularly IT leaders and procurement teams at businesses needing hardware, software, cloud networking, managed services and project support.
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StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides IT hardware and networking equipment including routers, switches, transceivers, power supplies and firewalls from major brands, and offers system integration, cloud, and IT infrastructure…
Serves B2B customers worldwide, including small businesses, enterprises, data centres and IT teams buying network, server and infrastructure hardware from brands such as Cisco, HPE, Dell, Juniper and…
Financial Health
StableStable · -10% CAGR over 4y
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Computed from 4 filingsProvides IT support and managed technology services for businesses, including network design and support, internet connectivity, VoIP telephony, cloud services with Microsoft 365 and Azure, hosting,…
Serves businesses across the UK, from small single-site firms to larger multi-site organisations, that require outsourced IT and technology support.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 3y
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Computed from 3 filingsSupplies and resells IT hardware and enterprise technology products, and provides managed IT services and IT solutions. Offers procurement of client and enterprise equipment along with support for…
Serves business customers and organisational IT teams seeking a reseller for client and enterprise IT products, managed services and IT solutions.
Financial Health
StrongStrong · Hiring · 61% CAGR over 2y
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Computed from 5 filingsProvides configuration, assembly and testing of servers, storage systems and networking equipment, plus global IT logistics and supply of network accessories. Delivers integrated infrastructure…
Targets B2B infrastructure and procurement teams at capital markets/HFT firms, AI/ML organisations and enterprises with global data-centre estates requiring worldwide delivery and support.
Financial Health
StrongStrong · Hiring · 32% CAGR over 4y
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Computed from 5 filingsProvides managed IT support and infrastructure services for businesses, including helpdesk support, cloud and hosted systems, cybersecurity, backup and disaster recovery, internet connectivity and…
Serves businesses of all sizes, including startups, SMEs and growing teams, with customers based in London and overseas that need outsourced IT support and infrastructure management.
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
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Computed from 5 filingsProvides IT procurement and supply services, sourcing hardware including networking equipment, storage systems and RF amplifiers. Offers licensing advice, infrastructure deployment, data security and…
Serves UK public sector and enterprise buyers, including central government, local councils, healthcare, transportation, security and defence organisations, plus businesses with IT infrastructure…
Financial Health
StableStable · -4% CAGR over 4y
Location
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Computed from 5 filingsProvides IT infrastructure, cloud and cybersecurity solutions, including servers, storage, networking, end‑user computing and collaboration systems. Delivers managed IT services, help desk support,…
Serves B2B customers, from small businesses to global companies, targeting IT leaders and operations teams responsible for infrastructure, cloud, cybersecurity, digital workplace and managed support,…
Financial Health
StrongStrong · Hiring · 10% CAGR over 5y
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Computed from 5 filingsProvides managed IT services and technology solutions for enterprises, telecommunications companies and system integrators. Services include IT infrastructure management, technology procurement and…
Serves B2B customers, including global system integrators, telecommunications companies and enterprise organisations with international IT operations and multi-region technology partner needs.
Financial Health
HealthyHealthy · -61% CAGR over 4y
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Computed from 5 filingsProvides managed IT support and network services for businesses, including IT infrastructure management, cybersecurity, email security, and backup and disaster recovery. Supplies and supports…
Sells to businesses needing outsourced IT support, managed services and business software, including users of Microsoft 365, Dynamics 365 and Pegasus Opera. Targets organisations in Croydon, London,…
Financial Health
StableStable · -2% CAGR over 4y
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Computed from 3 filingsProvides managed IT services including network connectivity, cloud hosting, cybersecurity and zero‑trust solutions, plus system monitoring, support and technology procurement, taking responsibility…
Sells to businesses seeking outsourced IT, network, cloud and security support, particularly leadership teams wanting a technology partner to manage the full IT environment as they grow.
Financial Health
HealthyHealthy · -86% CAGR over 2y
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Computed from 3 filingsProvides managed IT support and consultancy for businesses, including cloud solutions, Microsoft 365 services, cybersecurity, internet connectivity, telecoms systems, and business continuity…
Serves London-based businesses with office and remote teams, targeting business owners and managers seeking outsourced IT support, security, cloud, connectivity and telecoms.
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StableStable · 3% CAGR over 2y
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Computed from 5 filingsProvides managed IT support and service desk operations, cloud services including Microsoft 365, AWS and Azure, data backup and disaster recovery, network and Wi‑Fi management, telecommunications…
Sells to businesses across the UK seeking managed IT support, cloud, voice and data, networking, security, CCTV, alarms and audio-visual services. Targets business buyers needing outsourced IT and…
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StableStable · -2% CAGR over 4y
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Computed from 4 filingsProvides IT support and managed IT services for businesses, including network infrastructure, cloud and server management, cybersecurity monitoring, Microsoft 365 support, hardware provisioning,…
Serves SMB, mid-market and corporate businesses across the UK, plus remote workers and some home users seeking managed IT support, cloud, cybersecurity and connectivity services.
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StableStable · Hiring · 21% CAGR over 3y
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Provides systems integration and managed IT services including network connectivity, unified communications, cybersecurity, mobile and cloud solutions. Designs, implements and supports…
Serves UK SMEs, large enterprises and public sector organisations, including local government, higher education, housing and healthcare bodies, typically through IT and communications decision-makers.
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Computed from 5 filingsDesigns, deploys and supports contact centre and customer experience platforms, including cloud and on‑premise solutions. Provides consultancy, system integration, migration and managed services,…
Serves B2B channel partners and their end customers, particularly organisations operating contact centres and customer experience teams across on-premise, cloud or hybrid environments.
Financial Health
HealthyHealthy · Hiring · 16% CAGR over 5y
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Computed from 3 filingsProvides managed IT services and support for businesses, including cloud infrastructure, Microsoft 365 and Azure management, hosted desktops, cybersecurity services, penetration testing, telecoms,…
Serves businesses seeking outsourced or augmented IT support, including leaders responsible for technology strategy, security, cloud infrastructure, productivity and predictable IT costs.
Financial Health
StableStable · 3% CAGR over 2y
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Computed from 5 filingsProvides IT infrastructure services including third‑party hardware maintenance, data centre assessments, installations and relocations, and on‑demand field engineering. Supplies servers, storage and…
Sells primarily to businesses with complex IT infrastructure, especially enterprise IT teams and data centre operators needing maintenance, relocation, asset disposal, hardware sourcing, cloud and…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
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Computed from 5 filingsProvides enterprise networking, unified communications and hosted telephony services. Designs and manages internet connectivity, VPN and security infrastructure, call and contact centre systems,…
Sells to businesses and public sector organisations, from small enterprises to FTSE 100 and multinational companies. Serves sectors including government, utilities, healthcare, professional services,…
Financial Health
StableStable · Hiring · 47% CAGR over 4y
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Computed from 5 filingsProvides managed IT services including infrastructure management, cloud and virtualisation, service desk support, endpoint security, disaster recovery, data protection, print management, hardware…
Serves organisations of all sizes across the UK, spanning public and private sectors including local authorities, police, central government, healthcare, education, retail, manufacturing, housing…
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StableStable · 0% CAGR over 4y
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Computed from 5 filingsProvides IT infrastructure services, software development, cybersecurity, and hybrid cloud solutions, supporting technology operations for iGaming, financial services, and enterprise organisations,…
Serves B2B customers in the iGaming, finance and enterprise sectors, with a focus on organisations operating in the UK and Malta.
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StableStable · Hiring · 3% CAGR over 4y
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Computed from 5 filingsProvides managed IT services including technical support, IT infrastructure management, software licensing, technology procurement and cybersecurity services, helping organisations maintain and…
Serves businesses and other organisations seeking an outsourced IT partner, targeting decision-makers responsible for employee technology, procurement, licensing and cyber security.
Financial Health
StableStable · Hiring · 9% CAGR over 5y
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Computed from 3 filingsProvides managed IT services and IT infrastructure solutions, including data storage, enterprise compute, virtualisation and data management. Sources and deploys hardware and software such as Cisco…
Serves businesses across industries, particularly IT teams and organisations needing managed IT, enterprise infrastructure, data storage, virtualisation and remote-working support.
Financial Health
HealthyHealthy · 29% CAGR over 1y
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Computed from 5 filingsSupplies IT hardware including laptops, desktops, monitors, printers, networking equipment and audiovisual devices. Provides IT support, consultancy, network design and implementation, and software…
Serves businesses and individual end users needing IT hardware, software and support, including buyers sourcing workplace computing, networking, AV, telephony, servers and mobile devices.
Financial Health
DistressedDistressed · -36% CAGR over 4y
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Computed from 2 filingsProvides enterprise IT services including managed IT support, cloud migration and optimisation, AI consulting and implementation, AIOps, cybersecurity, data centre consolidation, application and…
Serves enterprise and SMB organisations worldwide, especially finance, banking, telecoms, insurance, travel, healthcare and government agencies with secure, complex IT environments.
Financial Health
StrongStrong
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Computed from 3 filingsProvides managed IT services including IBM Power and storage solutions, cloud hosting and migration, cybersecurity, data protection, backup and disaster recovery, and IT automation, along with…
Serves B2B and public sector organisations in regulated industries, including financial services, healthcare, education, construction, logistics, manufacturing, retail and media, targeting CIOs, IT…
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HealthyHealthy · 0% CAGR over 2y
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Computed from 5 filingsProvides IT infrastructure products and services including networking equipment, firewalls, storage and virtualisation systems. Supplies hardware and software, procurement and deployment, along with…
Serves SMEs through global enterprises across the UK and Ireland, targeting businesses needing IT infrastructure, support, hardware, software, networking, storage, virtualisation and security…
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HealthyHealthy · 0% CAGR over 4y
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Computed from 5 filingsProvides IT consulting and managed services including cloud solutions, cloud security, datacenter and network architecture, wireless and mobility systems, collaboration platforms, connectivity…
Serves business and public-sector clients, including organisations in financial services, retail, healthcare, professional services, aviation/transportation, legal and government sectors, with a…
Financial Health
HealthyHealthy
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Computed from 5 filingsProvides managed IT support and technology services for businesses, including cloud solutions, cybersecurity, data backup and disaster recovery, network infrastructure, IT project delivery, hardware…
Serves businesses that need external IT support and managed technology services, including organisations planning cloud, cybersecurity, backup, networking, hardware procurement or leasing projects.
Financial Health
StableStable · -4% CAGR over 4y
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Computed from 5 filingsProvides IT services for businesses including cloud computing, disaster recovery and data protection, managed IT support, cybersecurity, infrastructure management, software development, telephony…
Sells to UK businesses, with emphasis on City financial-services clients and market professionals, as well as startups, mid-sized companies and enterprises requiring ongoing ICT support and…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
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Computed from 5 filingsProvides IT consultancy and technology solutions for businesses, including IT procurement, strategy planning, cybersecurity, software supply, data management, and virtualisation. Supports…
Serves B2B organisations and educational institutions, including finance, banking, insurance, energy, industrial, travel and tourism businesses, plus primary and secondary schools and universities…
Financial Health
HealthyHealthy · -3% CAGR over 4y
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Computed from 5 filingsProvides IT support and managed services for businesses, including help desk, remote monitoring, on-site support and hardware break/fix. Supplies hardware and software, cloud migration and Microsoft…
Serves businesses and organisations across the UK, including charities and public-sector or international bodies, with buyers such as operations and IT managers responsible for workplace technology…
Financial Health
WeakWeak · 0% CAGR over 4y
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Computed from 2 filingsSupplies IT hardware and software to businesses, including laptops, monitors, servers, storage and peripherals from vendors such as HP, Dell, Lenovo, Cisco and Microsoft. Provides procurement, device…
Sells to business IT teams and IT professionals, particularly organisations needing employee computing equipment, peripherals, software, device deployment support and supplier management for hybrid…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 300% CAGR over 1y
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How London IT Reseller companies work and how to sell to them
What they do
London IT resellers make money through a blend of product margin, licence renewal margin, implementation fees and recurring support retainers. Hardware and software procurement is often the entry point, but the more defensible revenue usually comes from configuration, migration, device management, cloud administration and managed helpdesk work. Pricing tends to follow the underlying category: per-device or per-user for support, pass-through plus margin for products, day rates for projects and monthly retainers for ongoing service. Smaller engagements may look transactional, while larger accounts expect account management, credit terms, delivery coordination and escalation routes into distributors or publishers.
Who they sell to
Most London resellers sell to organisations that want one accountable supplier for workplace technology, rather than separate procurement, installation and support relationships. Typical customers are SMEs and mid-market firms with distributed staff, regulated professional services buyers, and enterprise departments running refresh or migration projects. Buying groups usually include the IT director or CTO, procurement, finance and sometimes operations, with security reviewers entering when managed services or admin access are involved. Lower-risk orders can move through direct sales and quoting, while larger refreshes and support agreements tend to involve renewal calendars, vendor comparisons, credit checks and negotiated service levels.
What they buy
Most IT reseller firms tend to spend on tools that improve quote accuracy, renewal capture, stock visibility and service delivery. Common categories include CRM, configure-price-quote software, procurement workflow, licence and asset management, billing, finance, contract management, service-desk, remote monitoring, endpoint security, backup and reporting tools. They also buy specialist accounting, legal, insurance, recruitment and marketing services, particularly where vendor terms, customer liability and recurring revenue plans need cleaner controls. For infrastructure, spend usually sits around cloud administration, test environments, telecoms, logistics, warehousing for devices, and internal cyber controls that help them pass customer due diligence.
Why and how to sell to them
IT reseller buyers tend to evaluate suppliers when margin pressure, renewal leakage or service-desk workload becomes visible to management. Other triggers include a new sales or operations leader, movement into managed services, a large customer onboarding, failed customer audit, vendor accreditation review, or headcount growth in procurement and support teams. Outbound angles work better when tied to measurable operational friction: fewer missed renewals, quicker quoting, cleaner licence evidence, lower ticket handling cost or clearer profitability by account. Generic modernisation language is less useful; these firms usually care about cash collection, rebate treatment, customer retention and proving that support commitments can be met.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
Also in London
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Frequently asked questions
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