Company lists · Data refreshed September 2026

Top 25 Enterprise voice solutions companies based in the United Kingdom

RevenueBase identified 720 company matches for enterprise voice solutions companies associated with the United Kingdom as of September 2026 and tracks 11,403 professional contacts across them, including 4,063 with verified work emails and 827 with mobile numbers. London is the largest hub.

This list covers company matches for enterprise voice solutions 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 September 2, 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 Sep 2, 2026 How this list was built
720Companies
11,403Contacts tracked
4,063Verified emails
827Mobile numbers
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest enterprise voice solutions companies based in the United Kingdom

Ranked by team size
Top 25 of 720 company matches for enterprise voice solutions companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 2, 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 matchWashington, United Kingdom1,001-5,0001,576 contacts →

Exact match

“Gamma Communications is a leading provider of technology-based communication solutions across Europe.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
2Exact matchLondon, United Kingdom501-1,000661 contacts →

Exact match

“Innovation is at the core of Exponential-e, and has been since our inception in 2002.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
3Exact 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 · Sep 2, 2026 · View company records in RevenueBase
4Exact 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 · Sep 2, 2026 · View company records in RevenueBase
5Exact 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 · Sep 2, 2026 · View company records in RevenueBase
6Exact matchLondon, United Kingdom51-200172 contacts →

Exact match

“bOnline is UK’s leading provider of VoIP services for micro and small businesses.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
7Exact 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 · Sep 2, 2026 · View company records in RevenueBase
8Exact matchLondon, United Kingdom201-500122 contacts →

Exact match

“What if you could dispense with the frustration, fragmentation and complexity of managing a disparate patchwork of regional telecoms vendors?”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
9Exact matchLondon, United Kingdom10001+120 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
10Exact matchOrpington, United Kingdom51-200111 contacts →

Exact match

“FLR Spectron is an award-winning, integrated solutions provider with over two decades of experience in the Telecoms, Mobile, Interiors, Technology, Cooling and Fire and Security…”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
11Exact matchWorcester, United Kingdom51-200109 contacts →

Exact match

“We provide communication solutions and IT business services to businesses, big and small, to help your business grow.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
12Exact matchSouthampton, United Kingdom51-20097 contacts →

Exact match

“Yo Telecom is an award winning telecommunications provider that specialises in small to medium sized businesses.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
13Exact 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 · Sep 2, 2026 · View company records in RevenueBase
14Exact 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 · Sep 2, 2026 · View company records in RevenueBase
15Exact matchPeterborough, United Kingdom51-20073 contacts →

Exact match

“Rydal Group is the brand name of Rydal Communications LTD, Rydal Security LTD & Rydal Energy LTD.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
16Exact matchMarket Harborough, United Kingdom51-20068 contacts →

Exact match

“With 30+ years of experience in industry, Welcomm transform the way businesses communicate and operate.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
17Exact matchManchester, United Kingdom51-20067 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
18Exact 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 · Sep 2, 2026 · View company records in RevenueBase
19Exact matchBrighouse, United Kingdom51-20061 contacts →

Exact match

“Business: It’s all about connecting people.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
20Exact matchTelford, United Kingdom51-20061 contacts →

Exact match

“We’re a leading unified communications provider supplying over 2 million users with the technology they need to work their magic.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
21Exact 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 · Sep 2, 2026 · View company records in RevenueBase
22Exact 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 · Sep 2, 2026 · View company records in RevenueBase
23Exact matchGosport, United Kingdom51-20044 contacts →

Exact match

“We help UK companies cut costs, stay connected, and scale smarter - with VoIP, mobile and broadband solutions that actually work.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
24Exact matchBelfast, United Kingdom51-20043 contacts →

Exact match

“The Simplicity Group specialise in fully managed communications and technology solutions for businesses throughout the UK and Ireland.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
25Exact matchChristchurch, United Kingdom51-20033 contacts →

Exact match

“At Mtech, we pride ourselves in taking an honest view of your current telecoms solution, if needed we will demonstrate how our package not only simplifies your set up, with the…”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase

Showing 25 of 720 enterprise voice solutions companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 4,063 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Enterprise voice solutions companies based in the United Kingdom at a glance

As of Sep 2, 2026
35.6%Verified-email coverage
7.3%Mobile-number coverage
15.8Average contacts per company
11-50Median size (employees)
18.5%Largest-city concentration · London
Sep 2, 2026Page data refreshed

Companies by employee count

1-10
323
11-50
307
51-200
48
201-500
7
501-1,000
7
1,001-5,000
4
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 “enterprise voice solutions 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 4,063 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 September 2, 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.

Enterprise voice solutions 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 “enterprise voice solutions companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many enterprise voice solutions companies are there based in the United Kingdom?

RevenueBase identified 720 company matches for enterprise voice solutions companies associated with the United Kingdom as of September 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?

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

Which city has the most enterprise voice solutions companies?

London leads with 133 company records, followed by Manchester (15) and Birmingham (14).

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 4,063 professional contacts with verified work emails tracked across these 720 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 September 2, 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.