Company lists · Data refreshed September 2026

Top 25 Cloud communications companies based in the United Kingdom

Name: Cloud communications companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 241 companies tracked

RevenueBase identified 241 cloud communications companies headquartered in the United Kingdom as of September 2026 and tracks 5,036 professional contacts across them, including 1,762 with verified work emails. London is the largest hub.

This list covers cloud communications companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review

241Companies

5,036Contacts tracked

1,762Verified emails

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The 25 largest cloud communications companies based in the United Kingdom

Ranked by team size

Top 25 of 241 cloud communications companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to cloud communications companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Onecom	Strong evidence	Fareham, United KingdomHQ checked Sep 14, 2026	501-1,000	655 contacts →
	Strong evidence “Onecom is the UK’s leading business telecoms and cloud communications provider managing over a million services for business customers - delivering communication services and…” Source: RevenueBase Database · checked Sep 14, 2026
2	Imimobile Part Of Webex	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	1,001-5,000	433 contacts →
	Indirect evidence “We've moved!” Source: RevenueBase Database · checked Sep 14, 2026
3	Elite Group	Indirect evidence	Chorley, United KingdomHQ checked Sep 14, 2026	51-200	148 contacts →
	Indirect evidence “Great technology matters, but it’s great people who make it work.” Source: RevenueBase Database · checked Sep 14, 2026
4	NTT Ltd. Collaboration & CX	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	10001+	120 contacts →
	Indirect evidence “The Collaboration and CX solutions offered by NTT Ltd.” Source: RevenueBase Database · checked Sep 14, 2026
5	Tyntec	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	103 contacts →
	Strong evidence “tyntec is a cloud communications provider enabling businesses to communicate easier with their customers, workforce and machines.” Source: RevenueBase Database · checked Sep 14, 2026
6	Flotek Group Limited	Partial evidence	Bridgend, United KingdomHQ checked Sep 14, 2026	51-200	96 contacts →
	Partial evidence “At last, an IT & Comms service provider taking SMEs to the Cloud with confidence, clarity and clout.” Source: RevenueBase Database · checked Sep 14, 2026
7	Wavecrest	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	93 contacts →
	Indirect evidence “Wavecrest is a global managed voice and messaging services company.” Source: RevenueBase Database · checked Sep 14, 2026
8	Sipcom	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	501-1,000	86 contacts →
	Indirect evidence “Sipcom exists to make you the hero of your business narrative by turning complexity into clarity.” Source: RevenueBase Database · checked Sep 14, 2026
9	Hornbill	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	85 contacts →
	Partial evidence “Hornbill is an innovator of cloud-based business collaboration technology and applications that engage teams, optimise operations and deliver better customer experiences.” Source: RevenueBase Database · checked Sep 14, 2026
10	Gradwell	Strong evidence	Bath, United KingdomHQ checked Sep 14, 2026	51-200	85 contacts →
	Strong evidence “Gradwell Communications Ltd are a leading cloud communications solutions provider with a focus on small to medium-sized businesses (SMEs).” Source: RevenueBase Database · checked Sep 14, 2026
11	Telappliant	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	67 contacts →
	Strong evidence “Telappliant is an award-winning VoIP and cloud communications provider.” Source: RevenueBase Database · checked Sep 14, 2026
12	Britannic	Partial evidence	Guildford, United KingdomHQ checked Sep 14, 2026	51-200	65 contacts →
	Partial evidence “A leading Systems Integrator and Technology Innovator trusted by world class brands for over 40 years, Britannic designs, develops and delivers business communications, sovereign…” Source: RevenueBase Database · checked Sep 14, 2026
13	Nebula	Partial evidence	Guildford, United KingdomHQ checked Sep 14, 2026	51-200	62 contacts →
	Partial evidence “Nebula is a leading SaaS provider of workplace communications software, delivering powerful, secure, and adaptable solutions and applications for voice, messaging, customer…” Source: RevenueBase Database · checked Sep 14, 2026
14	Digitalk	Strong evidence	Milton Keynes, United KingdomHQ checked Sep 14, 2026	51-200	60 contacts →
	Strong evidence “Digitalk, a Hansen Technologies company, enables communications service providers worldwide to operate efficient and innovative services profitably with its Carrier Cloud and…” Source: RevenueBase Database · checked Sep 14, 2026
15	Firstcom Europe LTD	Partial evidence	Bolton, United KingdomHQ checked Sep 14, 2026	51-200	56 contacts →
	Partial evidence “We have over 20 years' experience of working to deliver best of breed cloud telephony solutions to B2B clients.” Source: RevenueBase Database · checked Sep 14, 2026
16	SCB Global LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	52 contacts →
	Partial evidence “SCB Global is a leading global provider of collaboration and communication solutions native inside Microsoft Teams, delivering workplace transformation for the dynamic workforce.” Source: RevenueBase Database · checked Sep 14, 2026
17	Microtalk	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	45 contacts →
	Strong evidence “Microtalk: Global Communications Made Simple For over 15 years, Microtalk has delivered reliable voice, messaging, and cloud communications to businesses worldwide.” Source: RevenueBase Database · checked Sep 14, 2026
18	Voiceflex	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	43 contacts →
	Partial evidence “Voiceflex is an innovative and multi-award-winning wholesale communications provider and leading telecoms carrier of SIP, Hosted Telephony, Connectivity, Unified Communications…” Source: RevenueBase Database · checked Sep 14, 2026
19	XINIX	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	43 contacts →
	Strong evidence “Xinix is UK’s leading cloud-based unified communication provider making persistent efforts towards modernizing business communications.” Source: RevenueBase Database · checked Sep 14, 2026
20	SVL	Strong evidence	East Kilbride, United KingdomHQ checked Sep 14, 2026	11-50	36 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 14, 2026
21	Comtec Enterprises LTD	Partial evidence	Reigate, United KingdomHQ checked Sep 14, 2026	11-50	36 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 14, 2026
22	Pinnaca	Strong evidence	Slough, United KingdomHQ checked Sep 14, 2026	51-200	32 contacts →
	Strong evidence “We are a leading worldwide provider of cloud-based and customer hosted managed visual communication and collaboration services.” Source: RevenueBase Database · checked Sep 14, 2026
23	Quickblox	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	31 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 14, 2026
24	Cerberus Networks	Partial evidence	Greenford, United KingdomHQ checked Sep 14, 2026	11-50	30 contacts →
	Partial evidence “Cerberus Networks provides innovative connectivity, cloud computing and managed IT services.” Source: RevenueBase Database · checked Sep 14, 2026
25	Eloquent Technologies Limited	Indirect evidence	Stratford Upon Avon, United KingdomHQ checked Sep 14, 2026	11-50	28 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 14, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cloud communications companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cloud communications companies.
Partial evidence: Its own public description names part of cloud communications companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud communications companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 241 cloud communications companies based in the United Kingdom

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Cloud communications companies based in the United Kingdom at a glance

As of Sep 14, 2026

35.0%Verified-email coverage

20.9Average contacts per company

11-50Median size (employees)

29.0%Largest-city concentration · London

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 241 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cloud communications companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “cloud communications companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cloud communications companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among cloud communications companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,762 across the full list. 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 September 14, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Cloud communications companies by metro

Cloud communications companies in London70

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cloud communications companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 241 cloud communications companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Onecom, headquartered in Whiteley, tops this list with the largest team on record.

Which city has the most cloud communications companies?

London leads with 70 headquartered companies, followed by Birmingham (4) and Leeds (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,762 verified decision-maker contacts tracked across these 241 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 14, 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 Smart Search, 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.