Company lists · Data refreshed October 2026

Top 25 Cloud communications companies based in the United Kingdom

RevenueBase identified 256 company matches for cloud communications companies associated with the United Kingdom as of October 2026 and tracks 5,244 professional contacts across them, including 1,886 with verified work emails. London is the largest hub.

This list covers company matches for cloud communications companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built
256Companies
5,244Contacts tracked
1,886Verified emails
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The 25 largest cloud communications companies based in the United Kingdom

Ranked by team size
Top 25 of 256 company matches for cloud communications companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFareham, United KingdomHQ recorded Oct 1, 2026501-1,000655 contacts →

Exact match

“Onecom is the UK’s leading business telecoms and cloud communications provider managing over a million services for business customers - delivering communication services and…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Oct 1, 20261,001-5,000433 contacts →

Exact match

“We've moved!”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3Exact matchChorley, United KingdomHQ recorded Oct 1, 202651-200148 contacts →

Exact match

“Great technology matters, but it’s great people who make it work.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Oct 1, 202610001+120 contacts →

Exact match

“The Collaboration and CX solutions offered by NTT Ltd.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-200103 contacts →

Exact match

“tyntec is a cloud communications provider enabling businesses to communicate easier with their customers, workforce and machines.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6Exact matchBridgend, United KingdomHQ recorded Oct 1, 202651-20096 contacts →

Exact match

“At last, an IT & Comms service provider taking SMEs to the Cloud with confidence, clarity and clout.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20093 contacts →

Exact match

“Wavecrest is a global managed voice and messaging services company.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Oct 1, 2026501-1,00086 contacts →

Exact match

“Sipcom exists to make you the hero of your business narrative by turning complexity into clarity.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20085 contacts →

Exact match

“Hornbill is an innovator of cloud-based business collaboration technology and applications that engage teams, optimise operations and deliver better customer experiences.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10Exact matchBath, United KingdomHQ recorded Oct 1, 202651-20085 contacts →

Exact match

“Gradwell Communications Ltd are a leading cloud communications solutions provider with a focus on small to medium-sized businesses (SMEs).”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20067 contacts →

Exact match

“Telappliant is an award-winning VoIP and cloud communications provider.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12Exact matchGuildford, United KingdomHQ recorded Oct 1, 202651-20065 contacts →

Exact match

“A leading Systems Integrator and Technology Innovator trusted by world class brands for over 40 years, Britannic designs, develops and delivers business communications, sovereign…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13Exact matchGuildford, United KingdomHQ recorded Oct 1, 202651-20062 contacts →

Exact match

“Nebula is a leading SaaS provider of workplace communications software, delivering powerful, secure, and adaptable solutions and applications for voice, messaging, customer…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14Exact matchMilton Keynes, United KingdomHQ recorded Oct 1, 202651-20060 contacts →

Exact match

“Digitalk, a Hansen Technologies company, enables communications service providers worldwide to operate efficient and innovative services profitably with its Carrier Cloud and…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15Exact matchBolton, United KingdomHQ recorded Oct 1, 202651-20056 contacts →

Exact match

“We have over 20 years' experience of working to deliver best of breed cloud telephony solutions to B2B clients.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20052 contacts →

Exact match

“SCB Global is a leading global provider of collaboration and communication solutions native inside Microsoft Teams, delivering workplace transformation for the dynamic workforce.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5045 contacts →

Exact match

“Microtalk: Global Communications Made Simple For over 15 years, Microtalk has delivered reliable voice, messaging, and cloud communications to businesses worldwide.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5043 contacts →

Exact match

“Voiceflex is an innovative and multi-award-winning wholesale communications provider and leading telecoms carrier of SIP, Hosted Telephony, Connectivity, Unified Communications…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5043 contacts →

Exact match

“Xinix is UK’s leading cloud-based unified communication provider making persistent efforts towards modernizing business communications.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20Exact matchEast Kilbride, United KingdomHQ recorded Oct 1, 202611-5036 contacts →

Exact match

“As the UK and Ireland’s longest serving trusted advisor to the Contact Centre industry, SVL has grown to become a leading provider of unified cloud communications and telephony…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21Exact matchReigate, United KingdomHQ recorded Oct 1, 202611-5036 contacts →

Exact match

“We specialise in providing unified communication, technology and datacentre services to businesses operating within the private and public sectors throughout the UK and across the…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22Exact matchSlough, United KingdomHQ recorded Oct 1, 202651-20032 contacts →

Exact match

“We are a leading worldwide provider of cloud-based and customer hosted managed visual communication and collaboration services.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5031 contacts →

Exact match

“QuickBlox is a leading cloud communication platform helping businesses bring AI-driven chat, video, and automation into their digital products-quickly, securely, and at scale.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24Exact matchGreenford, United KingdomHQ recorded Oct 1, 202611-5030 contacts →

Exact match

“Cerberus Networks provides innovative connectivity, cloud computing and managed IT services.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25Exact matchStratford Upon Avon, United KingdomHQ recorded Oct 1, 202611-5028 contacts →

Exact match

“Eloquent operates a range of platforms across various secure data centres in the UK, all of which are connected to our network and serve as the delivery point for our services.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

Showing 25 of 256 cloud communications companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,886 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cloud communications companies based in the United Kingdom at a glance

As of Oct 1, 2026
36.0%Verified-email coverage
20.5Average contacts per company
11-50Median size (employees)
28.1%Largest-city concentration · London
Oct 1, 2026Page data refreshed

Companies by employee count

1-10
107
11-50
98
51-200
31
201-500
6
501-1,000
6
1,001-5,000
2
10001+
3

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 256 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “cloud communications companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 1,886 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Cloud communications companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cloud communications companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cloud communications companies are there based in the United Kingdom?

RevenueBase identified 256 company matches for cloud communications companies associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Onecom tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most cloud communications companies?

London leads with 72 company records, followed by Poole (5) and Birmingham (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,886 professional contacts with verified work emails tracked across these 256 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.