Company lists · Data refreshed August 2026

Top 25 Cloud communication software companies based in the United Kingdom

RevenueBase identified 234 company matches for cloud communication software companies associated with the United Kingdom as of August 2026 and tracks 5,769 professional contacts across them, including 2,128 with verified work emails and 728 with mobile numbers. London is the largest hub.

This list covers company matches for cloud communication software 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 August 31, 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 Aug 31, 2026 How this list was built
234Companies
5,769Contacts tracked
2,128Verified emails
728Mobile numbers
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest cloud communication software companies based in the United Kingdom

Ranked by team size
Top 25 of 234 company matches for cloud communication software companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Aug 31, 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 matchWhite Waltham Maidenhead, United Kingdom1,001-5,000690 contacts →

Exact match

“ShoreTel is now part of Mitel.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
2Exact matchWhiteley, United Kingdom501-1,000650 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 · Aug 31, 2026 · View company records in RevenueBase
3Exact matchEnfield, United Kingdom501-1,000605 contacts →

Exact match

“Empowering service provider growth with the world’s most trusted Intelligent Communications Fabric.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
4Exact matchLondon, United Kingdom1,001-5,000436 contacts →

Exact match

“We've moved!”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
5Exact matchLondon, United Kingdom201-500226 contacts →

Exact match

“Since 2002, CallTower has been at the forefront of transforming global communication, emerging as a leader in enterprise-class cloud communication, collaboration, and CX solutions.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
6Exact matchLondon, United Kingdom51-200201 contacts →

Exact match

“At Hiya, we are revolutionizing the voice communication experience, making it more productive and secure.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
7Exact matchLondon, United Kingdom201-500182 contacts →

Exact match

“Synacor is a cloud-based software and services company headquartered in Buffalo, New York with offices across the globe.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
8Exact matchCheltenham, United Kingdom51-200165 contacts →

Exact match

“VoCoVo is a globally recognised innovative retail team communication solutions provider, improving business efficiency and customer experience for some of the best-known tier 1…”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
9Exact matchLondon, United Kingdom51-200154 contacts →

Exact match

“Luware builds intelligent, cloud-native CX solutions that unlock the full potential of Microsoft Teams for enterprise communication.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
10Exact matchChorley, United Kingdom51-200151 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
11Exact matchChester, United Kingdom51-20098 contacts →

Exact match

“Daktela is all-in-one contact center solution perfectly suited for small and mid-size businesses.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
12Exact matchEnfield, United Kingdom501-1,00092 contacts →

Exact match

“Metaswitch is a recognized leader in the development of ultra-high-performance, cloud native communications software.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
13Exact matchLondon, United Kingdom51-20092 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
14Exact matchWest Bath, United Kingdom51-20085 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 · Aug 31, 2026 · View company records in RevenueBase
15Exact matchLondon, United Kingdom501-1,00084 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 · Aug 31, 2026 · View company records in RevenueBase
16Exact matchManchester, United Kingdom51-20067 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
17Exact matchGuildford, United Kingdom51-20065 contacts →

Exact match

“At Britannic, we are dedicated to revolutionising business communications and driving digital transformation.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
18Exact matchGuildford, United Kingdom51-20060 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 · Aug 31, 2026 · View company records in RevenueBase
19Exact matchMilton Keynes, United Kingdom51-20058 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 · Aug 31, 2026 · View company records in RevenueBase
20Exact matchBolton, United Kingdom51-20055 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 · Aug 31, 2026 · View company records in RevenueBase
21Exact matchLeeds, United Kingdomn/a44 contacts →

Exact match

“Unify Square joined Unisys in June 2021 to help our clients create breakthrough employee experiences across devices and platforms as workflows change and evolve.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
22Exact matchLondon, United Kingdom11-5044 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 · Aug 31, 2026 · View company records in RevenueBase
23Exact matchAylesbury Bucks, United Kingdom11-5041 contacts →

Exact match

“Sytel Limited develops and supplies Softdial Contact Center (SCC) multimedia, multichannel, fully blended cloud contact center solutions, for quick and easy deployment by partners…”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
24Exact matchEast Kilbride, United Kingdom11-5035 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 · Aug 31, 2026 · View company records in RevenueBase
25Exact matchLondon, United Kingdom51-20035 contacts →

Exact match

“At Telogo, we are redefining the way the world connects.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase

Showing 25 of 234 cloud communication software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 2,128 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Cloud communication software companies based in the United Kingdom at a glance

As of Aug 31, 2026
36.9%Verified-email coverage
12.6%Mobile-number coverage
24.7Average contacts per company
11-50Median size (employees)
28.6%Largest-city concentration · London
Aug 31, 2026Page data refreshed

Companies by employee count

1-10
105
11-50
84
51-200
27
201-500
5
501-1,000
6
1,001-5,000
2
10001+
2

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 communication software 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 2,128 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 August 31, 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 communication software 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 communication software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 234 company matches for cloud communication software companies associated with the United Kingdom as of August 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?

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

Which city has the most cloud communication software companies?

London leads with 67 company records, followed by Manchester (7) and Bournemouth (5).

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 2,128 professional contacts with verified work emails tracked across these 234 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 August 31, 2026.

Ready to reach these companies? Verified emails and direct dials for all 234 cloud communication software companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

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.