B2B Companies Using 3CX in the UK: 88 Active Firms (2026)
B2B organisations using detected telephony manage sales and support calling through public-facing communications infrastructure in the UK.
For B2B operators, a detected hosted phone-system stack usually sits between the website, CRM and support desk rather than acting as a simple office PBX. It routes inbound sales and support calls, records contact histories and supports distributed account teams. Adoption tends to signal a company with enough call volume to care about routing, recording, presence and queue discipline, but not always the procurement footprint of an enterprise contact-centre estate. The buyer is commonly an operations, IT or commercial lead in an SME or lower mid-market B2B services business.
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UK adoption is small and concentrated: 88 active trading companies in this B2B cohort run the detected phone-system stack. Reported employment across the cohort totals 2,278 people, which points to a set weighted toward operating businesses rather than dormant shell entities. Within the sector’s detected live-chat comparison set, the system ranks ninth, with a 1.9% share; the comparison denominator is 4,573. Registered-address distribution leans outside the capital: South East 18.2%, London 13.6%, South West 12.5%, East Midlands 11.4% and North West 10.2%. The sector mix is mostly technical services, with IT services and managed services at 68.2%, telecommunications at 51.1% and cybersecurity at 42.0%.
B2B calling sits across several rulebooks rather than one sector licence. Companies running a phone-led stack need to treat call handling, prospecting and recording as data-processing activity where personal business-contact details are involved. The ICO’s PECR guidance covers live and automated direct-marketing calls, while UK GDPR still applies to named contacts even where the buying organisation is a corporate subscriber. For live B2B marketing calls, callers need screening against CTPS and TPS and must avoid organisations that have objected. Procurement is therefore less about the handset estate alone and more about audit trails, suppression lists, consent records and call-recording policies.
Adoption appears likely to remain tied to service desks, managed-service providers and technically literate B2B sales teams, rather than spreading evenly across the wider business base. Hosted telephony tends to be adopted when call routing, remote working and customer records need to be managed together; firms with lighter call volumes may stay with simpler bundles from their connectivity provider. Over time, pressure from privacy controls, call-screening expectations and CRM integration should favour stacks that leave clearer records of who was contacted, why, and under which lawful basis. Consolidation may come through bundling rather than stand-alone phone-system procurement.
Adoption by company size
Adoption of 3CX varies by company size across the trading UK B2B companies in this cohort. 0.1% of the 76,784 companies with under 10 employees run 3CX (44 detected). 0.1% of the 31,788 companies with 10–50 employees run 3CX (38 detected). 0.1% of the 3,773 companies with over 50 employees run 3CX (4 detected).
88
Active firms
2026
1.9%
Of detected Live chat share
UK B2B
8
Median headcount
Filed accounts
180
Verified contacts
Across this cohort
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Key facts
About 4% of the trading cohort reports turnover above £5M (4 of 88 firms) — the rest sits below that revenue band.
4% of the cohort was incorporated since 2022 (4 firms), so a sizeable share is in its first few filing cycles.
B2B organisations running the detected telephony system account for 1.9% (88) of 4,573 companies with a detectable system, behind eight larger detected platforms in the same category.
The regional skew is toward the South East at 18.2% (16), London at 13.6% (12) and the South West at 12.5% (11).
Detected stack overlap points to web-sales and support use: 55.7% (49) also run a content-management platform, 54.5% (48) run an analytics service and 40.9% (36) run a tag-management tool.
ICO guidance says live B2B marketing calls must be screened against CTPS and TPS, and UK GDPR applies where business-contact personal data is processed.
ONS reported 2.73 million VAT and/or PAYE businesses as of March 2025, up 0.4% from March 2024; DBT estimated 5.5 million private-sector businesses at the start of 2024.
Telephony & contact centre market share among UK B2B
Share of the 4,573 UK B2B with a detectable system. As of June 2026.
What else do 3CX-running B2B run?
Share of the 88 3CX-running UK companies where each technology was also detected. As of June 2026.
Where 3CX B2B are, and how healthy they look
By region
By registered-office region; companies without a regional match count toward Rest of UK.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
8
Median headcount
£578K
Median UK turnover
4.5%
Above £5M turnover
4
Incorporated since 2022
180 verified decision-maker contacts
across these 88 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK B2B using 3CX
Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.
Financial sub-scores
Computed from 5 filingsProvides wholesale SIP trunking and telecoms services to resellers, including UK and international numbering, inbound call services and connectivity. Distributes VoIP and PBX platforms such as Vodia…
Serves B2B telecoms and unified communications resellers, MSPs and VoIP/PBX partners seeking wholesale SIP, numbering and vendor support for their own business customers.
Financial Health
HealthyHealthy · -4% CAGR over 5y
Location
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Provides business IT support and telecommunications services, including cloud‑hosted VoIP phone systems, SIP trunks, business phone lines and unified communications. Also supplies IP phones and…
Serves small and medium-sized businesses needing outsourced IT support, telecoms and cloud infrastructure, including buyers of VoIP phone systems, business phone lines, connectivity and networking…
Financial Health
N/AN/A
Location
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Financial sub-scores
Computed from 2 filingsProvides managed IT support services for businesses, including network management, cybersecurity, cloud solutions, and business communications systems. Also supplies computer hardware and delivers IT…
Sells to businesses needing outsourced IT support, especially small teams, growing companies and busy offices. Serves B2B buyers seeking cybersecurity, cloud, communications and hardware support…
Financial Health
DistressedDistressed · 0% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides cloud-based VoIP business phone systems, including hosted PBX, SIP trunking, and Microsoft Teams direct routing. Also supplies business broadband, mobile SIM plans, and SMS messaging…
Serves UK businesses needing telecoms and connectivity, with specific focus on medical and dental practices, education providers, solicitors, accountants, travel agencies, and teams using CRM…
Financial Health
StrongStrong · Hiring · 68% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides cloud-based VoIP telephony services including hosted PBX systems and SIP trunking, plus broadband and leased line connectivity. Supports integration with business phone systems and platforms…
Serves UK businesses, IT teams and telecoms resellers needing cloud telephony, SIP trunking, broadband and leased-line connectivity, including organisations migrating from PSTN to digital voice.
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
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Financial sub-scores
Computed from 4 filingsProvides business telecommunications and IT services, including hosted voice and data solutions, fibre broadband and leased line internet connectivity, managed IT support for Windows and Mac systems,…
Serves businesses seeking outsourced communications and IT support, including organisations with office, remote and mobile employees needing business-grade connectivity and mobile plans.
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
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Financial sub-scores
Computed from 5 filingsSupplies office equipment and managed workplace services including printers, photocopiers, franking machines, telecoms and broadband systems, document management software, IT support, office…
Serves office-based businesses, targeting owners, office managers, facilities and operations teams seeking suppliers for workplace equipment, office technology, supplies and managed office services.
Financial Health
StableStable · -1% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides business telecommunications and IT services including hosted VoIP phone systems, broadband and leased line connectivity, business mobile tariffs, IoT SIM solutions, and managed IT support…
Serves UK businesses across sectors and sizes, including organisations with mobile or distributed workforces and firms using IoT in agriculture, healthcare, security, transport and logistics.
Financial Health
StrongStrong · Hiring · 3% CAGR over 4y
Location
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Financial sub-scores
Computed from 4 filingsProvides business telecommunications and IT services including hosted and on‑premise phone systems, VoIP and IP telephony, fixed lines, business mobiles, broadband and leased line connectivity, call…
Serves UK businesses, particularly small and growing organisations, with buyers including business owners, operations leads and IT decision-makers seeking managed communications, connectivity and IT…
Financial Health
HealthyHealthy
Location
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Financial sub-scores
Computed from 5 filingsProvides business telecommunications and IT services including cloud phone systems (3CX, 8x8, RingCentral, Microsoft Teams), mobile contracts, broadband and Wi‑Fi connectivity, managed networks, IT…
Serves businesses seeking communications and IT support, including organisations managing employees, customers and partners across phone, mobile, internet and cloud-based workplace systems.
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Financial sub-scores
Computed from 4 filingsProvides business telecommunications and connectivity services including VoIP phone systems, hosted telephony, SIP trunks, business broadband, leased lines, WiFi, mobile contracts, network cabling,…
Serves businesses of all sizes and sectors across London and the UK, including organisations seeking a single supplier for phone systems, connectivity, mobiles, IT networking and security.
Financial Health
HealthyHealthy · -3% CAGR over 3y
Location
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Financial sub-scores
Computed from 4 filingsProvides managed IT services for businesses, including IT support, consultancy, cloud solutions, VoIP telephony, network design and Wi‑Fi, cybersecurity, email and data migration, backup services,…
Targets start-ups, SMEs and larger organisations, including charities, that need an outsourced IT provider for office technology, cloud infrastructure, networks, communications and security.
Financial Health
HealthyHealthy · 3% CAGR over 3y
Location
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Financial sub-scores
Computed from 5 filingsProvides IT support and managed services for businesses, including cloud solutions, cybersecurity, network and server management, VoIP phone systems, broadband connectivity, remote and on‑site…
Serves businesses in Cornwall and across the UK needing outsourced IT support, including cloud, cyber security, network, server, phone and broadband support, on flexible or managed service…
Financial Health
HealthyHealthy · Growing · 2% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides hosted 3CX VoIP business phone systems, including licensing, setup and support. Operates private cloud infrastructure for telephony, offering call management features, system monitoring, and…
Serves UK businesses across industries, targeting decision-makers responsible for telecoms and communications who need reliable, supported, scalable hosted phone contracts.
Financial Health
StableStable · 0% CAGR over 2y
Location
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Financial sub-scores
Computed from 2 filingsProvides business telecommunications services including VoIP phone systems, SIP trunking, hosted 3CX platforms, Microsoft Teams direct routing, business broadband, leased lines and mobile services,…
Sells to businesses and organisations, particularly 3CX users and teams adopting Microsoft Teams telephony, SIP trunks, broadband and mobile services, with some focus on education customers.
Financial Health
StableStable · 3% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides business telecommunications and unified communications solutions, including cloud telephone systems, contact centre platforms, handsets and cloud migration. Resells and integrates services…
Serves businesses and organisations of any size, with emphasis on healthcare providers, education institutions, not-for-profits and housing associations.
Financial Health
WeakWeak · Hiring · 13% CAGR over 5y
Location
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Financial sub-scores
Computed from 3 filingsProvides outsourced IT support and managed IT services for businesses, including cloud backup, cybersecurity, VoIP telephony, IT infrastructure management, remote support, software development,…
Serves SMEs, local businesses and schools in Hertfordshire and the South East UK that need outsourced IT, cloud, security, telecoms and infrastructure support.
Financial Health
WeakWeak · -13% CAGR over 2y
Location
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Financial sub-scores
Computed from 4 filingsProvides managed IT support, outsourced helpdesk and onsite services; cloud solutions including Microsoft 365 and Azure; cybersecurity services such as audits, endpoint protection and penetration…
Serves businesses across the UK seeking outsourced IT, cloud, communications and cyber security support, including organisations needing managed support, consultancy, compliance help and business…
Financial Health
WeakWeak · Hiring · 7% CAGR over 3y
Location
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Financial sub-scores
Computed from 3 filingsProvides business telecommunications and IT services, including VoIP and hosted telephony, business phone systems, broadband and leased line connectivity, managed Wi‑Fi and SD‑WAN, mobile solutions,…
Serves businesses and organisations across the UK, including education providers and teams responsible for communications, connectivity, mobile estates, IT operations and security.
Financial Health
StrongStrong · Profitable, Growing, Hiring · 6% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides hosted 3CX PBX cloud phone systems for businesses, including VoIP telephony, call management, video and messaging integration. Offers system hosting on private servers, configuration,…
Sells to small businesses, growing teams and enterprises needing hosted business telecoms, with sector focus on hotels, education providers, law firms, financial services and other regulated advisory…
Financial Health
StableStable · -11% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides IT support and managed IT services for businesses, including network and system management, cybersecurity, telecoms, hardware supply, and remote working solutions. Offers on‑demand…
Serves SMBs and local businesses in Manchester, including legal firms, financial services, healthcare, recruitment, engineering and marketing organisations.
Financial Health
HealthyHealthy · Hiring · 39% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides IT support and telecommunications services for businesses, including hosted and on‑site 3CX VoIP phone systems, SIP trunks, broadband and leased line internet, site‑to‑site VPNs, firewall…
Serves SMEs and business owners or office managers seeking outsourced IT and telecoms support, including VoIP phone systems, connectivity and cybersecurity, with a London emphasis.
Financial Health
StableStable
Location
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Financial sub-scores
Computed from 4 filingsProvides managed IT services and technical support for businesses, including network and Wi‑Fi installations, server management, cloud and email solutions, backup and disaster recovery, antivirus…
Sells to businesses, primarily SMEs across the UK, especially companies without in-house IT expertise. Targets organisations seeking outsourced or co-sourced IT support, managed services, telecoms,…
Financial Health
StableStable · 0% CAGR over 3y
Location
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Provides IT support and managed IT services for businesses, including cloud solutions, cyber security, IT consultancy, network cabling, Wi‑Fi infrastructure, VoIP phone systems, broadband services,…
Serves businesses in Somerset, Devon and the South West, with sector focus on finance, healthcare, environmental organisations and charities, plus regional firms needing outsourced IT support.
Financial Health
N/AN/A
Location
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Computed from 5 filingsSupplies business telecommunications and IT services including VoIP phone systems, SIP trunks, business mobiles, fibre broadband, leased lines and managed WiFi. Also provides managed IT support,…
Serves UK businesses, especially small businesses and organisations in construction, hotels, events and other multi-site or mobile sectors, plus wholesale partners needing telecoms and connectivity…
Financial Health
StrongStrong · Growing, Hiring · 47% CAGR over 4y
Location
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Computed from 5 filingsProvides managed IT support and cybersecurity services for businesses, including endpoint detection and response, multi‑factor authentication, email security and DNS filtering. Also supplies…
Sells to small and mid-sized businesses in Bracknell, Reading, Wokingham and wider Berkshire that need outsourced IT and cyber security support.
Financial Health
StableStable · Hiring · 12% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides voice and data telecommunications and managed IT services for businesses, including VoIP and unified communications systems, cloud and hosted platforms, data connectivity, mobile and…
Serves UK businesses, schools and colleges, charities and museums, targeting organisational buyers responsible for communications, connectivity, IT infrastructure and security.
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides business telecommunications services including installation and support of telephone systems, cloud-hosted telephony, VoIP migration, SIP trunking, broadband and leased line connectivity,…
Serves businesses of varying sizes and NHS organisations that need business telephony, connectivity, mobile SIM and legacy phone system support.
Financial Health
StableStable · Hiring · 26% CAGR over 4y
Location
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Computed from 3 filingsProvides IT support and managed network services, including infrastructure maintenance, cloud computing, cybersecurity, data backup and Office 365 support. Also installs and manages VoIP telephone…
Serves small and medium-sized businesses and organisations across Beckenham, Bromley, Croydon and London, including those needing outsourced IT management and communications support.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides managed IT support and consultancy for businesses, including network management, cybersecurity, cloud services, Microsoft 365 and Azure solutions, VoIP telephony systems, data backup and…
Sells to businesses needing outsourced IT, telephony, cloud and cybersecurity support, particularly SMEs seeking managed or flexible support. Serves organisations across Hampshire, Surrey, London,…
Financial Health
HealthyHealthy · -6% CAGR over 4y
Location
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Computed from 4 filingsProvides managed IT services including outsourced IT support, Microsoft cloud solutions, VoIP and telecoms systems, cybersecurity services, and professional IT consulting. Also assists organisations…
Serves UK businesses in the mid-market and enterprise segments, targeting business owners and IT managers, including professional services firms such as legal and accountancy practices.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 3y
Location
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Computed from 3 filingsProvides managed IT support and IT services for businesses, including Microsoft 365, cloud backup and hosting, system monitoring and IT projects. Also supplies telecoms services such as business…
Serves small to medium-sized businesses and commercial or industrial organisations, primarily in Sheffield and South Yorkshire.
Financial Health
HealthyHealthy · -6% CAGR over 2y
Location
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Computed from 5 filingsProvides managed IT services including technical support, cloud migration, cybersecurity and compliance, Microsoft 365 workplace solutions, backup and disaster recovery, IT consultancy, and voice and…
Sells to businesses needing outsourced or co-managed IT support, especially accountancy, AEC, healthcare and legal firms, plus private equity-backed and growing companies seeking a better IT partner.
Financial Health
StableStable · Hiring · 19% CAGR over 4y
Location
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Computed from 5 filingsProvides outsourced IT support, cyber security services, managed print solutions as a Canon partner, and business communications systems. Also supplies and hires IT and event equipment to businesses.
Serves SMEs and other businesses across Scotland and the wider UK, including organisations outsourcing IT needs and Scottish SME customers in the Canon print market.
Financial Health
HealthyHealthy · -69% CAGR over 4y
Location
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Computed from 5 filingsProvides business telecommunications and managed IT services including VoIP and phone systems, unified communications, IT support, cybersecurity, data backup, managed Wi‑Fi, business mobile services,…
Serves businesses across the UK needing outsourced telecoms, IT support, connectivity and cyber security, from small and mid-sized firms to organisations with remote-working staff and legacy phone…
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
Location
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Computed from 5 filingsSupplies customer premises equipment for VoIP and IP communications, including SIP phones, DECT systems, routers, intercoms and networking hardware from multiple vendors. Provides device…
Serves telecoms and IT resellers, VoIP service providers and installers supplying business communications equipment to end users across the UK and Ireland.
Financial Health
StableStable · -68% CAGR over 4y
Location
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Computed from 5 filingsProvides IT support and managed services for businesses, including network connectivity, structured cabling, Wi‑Fi, fibre and leased lines. Offers consultancy and support for on‑premises and cloud…
Sells to UK businesses of all sizes needing IT support, connectivity and cloud or on-premises infrastructure. Serves multi-site organisations and companies with substantial user bases, as well as…
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 4y
Location
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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…
Financial Health
StableStable · -2% CAGR over 4y
Location
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Computed from 3 filingsProvides managed IT services including technical support, cybersecurity monitoring, cloud computing and Microsoft 365 management. Also supplies managed print services, document management, workflow…
Serves businesses and organisations in and around Derby, including office-based teams, growing companies and document-heavy operations needing outsourced technology, print and communications support.
Financial Health
HealthyHealthy · Growing, Hiring · 5% CAGR over 2y
Location
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Computed from 4 filingsProvides web design and development, digital marketing, bespoke software development, AI consultancy, managed IT support, and business telecoms services, helping organisations build and manage…
Serves businesses and organisations in Norfolk and Cambridgeshire seeking external digital, web, IT, software, marketing, telecoms or AI support.
Financial Health
StableStable · -3% CAGR over 3y
Location
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Computed from 5 filingsProvides managed IT support, cloud computing and business telecom services for organisations, including fibre broadband, VoIP phone systems, Microsoft 365 migration, cybersecurity, data backup, IT…
Serves small and medium-sized businesses and organisations across Wales and the UK that need external IT support, business telecoms, broadband and Microsoft cloud support.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
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Computed from 4 filingsProvides business telecommunications and fleet technology solutions including mobile phones, tablets and routers, hosted cloud and on‑site telephone systems, connectivity and SIP trunking, call…
Serves UK businesses with mobile workforces, especially fleet managers, HGV and van operators, and organisations needing business telecoms, connectivity, rugged devices, vehicle safety and tracking…
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 3y
Location
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Computed from 5 filingsProvides managed IT support and consultancy for businesses, including network management, cloud hosting, Microsoft 365 services, cybersecurity monitoring, disaster recovery and backups, VoIP phone…
Serves small and medium-sized businesses in Milton Keynes and surrounding areas, with some offerings for growing organisations and schools needing business communications and IT-related support.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
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Computed from 3 filingsProvides managed IT services including technical support, cybersecurity, cloud hosting, VoIP telephony, network infrastructure and IT project management. Also supplies software, hardware, and remote…
Serves businesses across the UK, including organisations with or without in-house IT teams that need external IT support, security, telephony and cloud suppliers.
Financial Health
StrongStrong · Hiring · 15% CAGR over 2y
Location
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Computed from 3 filingsProvides managed IT support and technology services for businesses, including hardware and infrastructure management, cloud and Microsoft 365 solutions, cybersecurity services, backup and disaster…
Serves businesses and modern workplaces in Leicester, Leicestershire and the East Midlands, with remote support for UK organisations needing managed IT, Microsoft 365 and cyber security support.
Financial Health
StrongStrong · Hiring · 27% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsDistributes VoIP and unified communications hardware and software to telecom resellers, including Fanvil phones, Yealink DECT devices and 3CX systems. Provides ordering portal, drop‑shipping,…
Serves B2B telecoms and IT resellers, including VoIP, unified communications and 3CX/Fanvil/Yealink channel partners, mainly in the UK with worldwide shipping for partners’ end customers.
Financial Health
HealthyHealthy · -65% CAGR over 4y
Location
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Computed from 5 filingsProvides managed IT services including helpdesk support, cybersecurity monitoring, cloud services, business connectivity, and telecom solutions such as VoIP and unified communications, alongside…
Serves businesses and organisations across Scotland, including B2B firms, independent schools, charities, third-sector organisations, housing associations, legal practices, and finance and accounting…
Financial Health
HealthyHealthy · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsProvides IT support and managed services including systems management, application hosting on private cloud infrastructure, VoIP telephony, Office 365 setup and migration, backup and disaster…
Serves businesses with office-based IT needs, including SMEs and local offices of larger companies, across sectors such as marine, recruitment, security and professional services.
Financial Health
HealthyHealthy · -7% CAGR over 5y
Location
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Computed from 5 filingsProvides IT support and network services for businesses, including cloud servers, hosted email, VoIP phone systems, cybersecurity, backup and managed print. Supplies, implements and supports Sage…
Serves small and medium-sized businesses needing outsourced IT support and Sage accounting systems, including organisations using Sage 50, Sage 200, Payroll or CRM.
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
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How 3CX usage is detected
Company data
Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Detection
Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling. B2B companies are identified using Firmbase's semantic classification of company activity, built from filings, websites and registered SIC codes rather than SIC codes alone. The detected counts and share figures on this page are computed within that sector cohort, so "share" always means share of B2B companies with a detectable system — not of all UK companies.
Freshness
Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.
3CX is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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Frequently asked questions
How many UK B2B companies use 3CX?
What share of UK B2B companies run 3CX?
How is 3CX usage detected?
What size B2B companies use 3CX in the UK?
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