Company lists · Data refreshed September 2026

Top 25 Unified communications services for IT consulting firms based in the United Kingdom

RevenueBase identified 331 company matches for unified communications services for IT consulting firms associated with the United Kingdom as of September 2026 and tracks 4,475 professional contacts across them, including 1,724 with verified work emails. London is the largest hub.

This list covers company matches for unified communications services for IT consulting firms 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 21, 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 21, 2026 How this list was built
331Companies
4,475Contacts tracked
1,724Verified emails
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The 25 largest unified communications services for IT consulting firms based in the United Kingdom

Ranked by team size
Top 25 of 331 company matches for unified communications services for IT consulting firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 matchSolihull, United KingdomHQ recorded Sep 21, 20261,001-5,000927 contacts →

Exact match

“Since we’ve been helping organisations stay connected, protected and ready for what comes next.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchLincoln, United KingdomHQ recorded Sep 21, 2026501-1,000203 contacts →

Exact match

“Multi-award-winning GCI is one of the UK’s leading ICT Service Providers, with offices across the UK.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchBury, United KingdomHQ recorded Sep 21, 202651-200156 contacts →

Exact match

“Our expertise spans consultancy, sales, installation and maintenance services across the communication spectrum, from unified comms systems and hardware, CX solutions and cloud…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 21, 202610001+120 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchHampton-in-arden, United KingdomHQ recorded Sep 21, 202651-200111 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 21, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
7Exact matchSwindon, United KingdomHQ recorded Sep 21, 202651-20072 contacts →

Exact match

“Excalibur provides an end to end business consulting service that offers reliable insight, and expertise in communications and technology.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchMarket Harborough, United KingdomHQ recorded Sep 21, 202651-20069 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 21, 2026 · View company records in RevenueBase
9Exact matchGuildford, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
10Exact matchTelford, United KingdomHQ recorded Sep 21, 202651-20061 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 21, 2026 · View company records in RevenueBase
11Exact matchCamberley, United KingdomHQ recorded Sep 21, 202651-20057 contacts →

Exact match

“Windsor Telecom believes that technology should be easy and enjoyable.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchSunderland, United KingdomHQ recorded Sep 21, 2026n/a56 contacts →

Exact match

“Established in 1995, Cellular Solutions NE, now part of Communications Plus, is a trusted business telecoms provider supporting organisations across the North East and throughout…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20046 contacts →

Exact match

“The Symity team are a group of passionate Microsoft Teams advocates who are dedicated to changing the way people work.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20045 contacts →

Exact match

“TiG provide award-winning cloud transformation services, unified communications and infrastructure solutions.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
18Exact matchSolihull, United KingdomHQ recorded Sep 21, 202651-20042 contacts →

Exact match

“Amillan is a communications integrator that delivers solutions to make your organisation perform better.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchCheltenham, United KingdomHQ recorded Sep 21, 202651-20038 contacts →

Exact match

“PSU supplies and supports business technology that is essential to our customers' operational needs, today and for the future, without ever compromising on quality service.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchWilmslow, United KingdomHQ recorded Sep 21, 202611-5036 contacts →

Exact match

“Zest4 are a leading provider of Unified Communications solutions for resellers across the UK.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchEast Kilbride, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
22Exact matchReigate, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
23Exact matchSlough, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
24Exact matchBelfast, United KingdomHQ recorded Sep 21, 202611-5026 contacts →

Exact match

“Welcome to Radius Connect Solutions.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchHam Green, United KingdomHQ recorded Sep 21, 20261-1023 contacts →

Exact match

“Alliance Communications provides businesses with clear impartial advice on a range of communications needs.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 331 unified communications services for IT consulting firms based in the United Kingdom

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Unified communications services for IT consulting firms based in the United Kingdom at a glance

As of Sep 21, 2026
38.5%Verified-email coverage
13.5Average contacts per company
1-10Median size (employees)
23.9%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
174
11-50
110
51-200
33
201-500
4
501-1,000
3
1,001-5,000
1
5,001-10,000
1
10001+
2

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 331 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 “unified communications services for IT consulting firms” 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 1,724 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 21, 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.

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 “unified communications services for IT consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many unified communications services for IT consulting firms are there based in the United Kingdom?

RevenueBase identified 331 company matches for unified communications services for IT consulting firms 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?

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

Which city has the most unified communications services for IT consulting firms?

London leads with 79 company records, followed by Manchester (7) and Glasgow (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 1,724 professional contacts with verified work emails tracked across these 331 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 21, 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.