Company lists · Data refreshed August 2026

Top 25 Cloud communications consulting companies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 790 companies tracked

RevenueBase identified 790 cloud communications consulting companies headquartered in the United Kingdom as of August 2026 and tracks 35,685 professional contacts across them, including 4,313 with verified work emails and 1,272 with mobile numbers. London is the largest hub.

This list covers cloud communications consulting 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

790Companies

35,685Contacts tracked

4,313Verified emails

1,272Mobile numbers

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The 25 largest cloud communications consulting companies based in the United Kingdom

Ranked by team size

Top 25 of 790 cloud communications consulting companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to cloud communications consulting 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	Shoretel	Indirect evidence	White Waltham Maidenhead, United Kingdom	1,001-5,000	690 contacts →
	Indirect evidence “ShoreTel is now part of Mitel.” Source: RevenueBase Database · checked Aug 31, 2026
2	Sourcefuse	Indirect evidence	London, United Kingdom	501-1,000	669 contacts →
	Indirect evidence “SourceFuse is a global, AI-native digital and product engineering company that helps enterprises build, modernize, and scale intelligent systems.” Source: RevenueBase Database · checked Aug 31, 2026
3	Exponential-E	Indirect evidence	London, United Kingdom	501-1,000	661 contacts →
	Indirect evidence “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Source: RevenueBase Database · checked Aug 31, 2026
4	Alianza	Partial evidence	Enfield, United Kingdom	501-1,000	605 contacts →
	Partial evidence “Empowering service provider growth with the world’s most trusted Intelligent Communications Fabric.” Source: RevenueBase Database · checked Aug 31, 2026
5	Devoteam Google Cloud Partner	Partial evidence	London, United Kingdom	501-1,000	546 contacts →
	Partial evidence “Devoteam is a Diamond Tier Partner in the Google Cloud Services Partner Path and a Managed Services Provider.” Source: RevenueBase Database · checked Aug 31, 2026
6	Maintel	Partial evidence	London, United Kingdom	201-500	361 contacts →
	Partial evidence “Maintel is a communications managed services provider.” Source: RevenueBase Database · checked Aug 31, 2026
7	BUI	Partial evidence	Derby, United Kingdom	51-200	250 contacts →
	Partial evidence “BUI is an award-winning global technology consultancy delivering cloud, security, networking and managed services from offices in South Africa, East Africa, the United Kingdom…” Source: RevenueBase Database · checked Aug 31, 2026
8	Calltower	Strong evidence	London, United Kingdom	201-500	226 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Aug 31, 2026
9	Proact IT Group AB	Partial evidence	Leeds, United Kingdom	1,001-5,000	224 contacts →
	Partial evidence “Proact is a leading IT expert helping customers secure business critical data via best in class hybrid cloud solutions.” Source: RevenueBase Database · checked Aug 31, 2026
10	Cloud Direct	Partial evidence	United Kingdom	51-200	168 contacts →
	Partial evidence “Cloud Direct is a leading Microsoft Partner that helps organisations realise the true value of artificial intelligence and position themselves as Agent-Ready Enterprises.” Source: RevenueBase Database · checked Aug 31, 2026
11	Avoira	Strong evidence	Bury, United Kingdom	51-200	155 contacts →
	Strong evidence “Our expertise spans consultancy, sales, installation and maintenance services across the communication spectrum, from unified comms systems and hardware, CX solutions and cloud…” Source: RevenueBase Database · checked Aug 31, 2026
12	Elite Group	Indirect evidence	Chorley, United Kingdom	51-200	151 contacts →
	Indirect evidence “Great technology matters, but it’s great people who make it work.” Source: RevenueBase Database · checked Aug 31, 2026
13	Digitalwell	Partial evidence	London, United Kingdom	201-500	113 contacts →
	Partial evidence “We are a market leading provider of enterprise communications, consultancy and technology transformation services.” Source: RevenueBase Database · checked Aug 31, 2026
14	RDX	Partial evidence	London, United Kingdom	501-1,000	110 contacts →
	Partial evidence “Navisite is a modern managed cloud service provider that accelerates IT transformation for thousands of growing and established global brands.” Source: RevenueBase Database · checked Aug 31, 2026
15	Flotek Group Limited	Partial evidence	Pencoed, United Kingdom	51-200	95 contacts →
	Partial evidence “At last, an IT & Comms service provider taking SMEs to the Cloud with confidence, clarity and clout.” Source: RevenueBase Database · checked Aug 31, 2026
16	Adex International	Partial evidence	Folkestone, United Kingdom	51-200	91 contacts →
	Partial evidence “Adex International is an ISO Certified company (ISO/IEC 27001:2013) specializing in IT Outsourcing, Cloud Consultation & Modernization.” Source: RevenueBase Database · checked Aug 31, 2026
17	Sysgroup	Partial evidence	London, United Kingdom	51-200	88 contacts →
	Partial evidence “SysGroup is the services leader for realising AI transformation, as an award-winning managed IT services, cloud hosting, and IT consultancy provider.” Source: RevenueBase Database · checked Aug 31, 2026
18	Iotap INC	Partial evidence	Middleton, United Kingdom	51-200	86 contacts →
	Partial evidence “IOTAP provides IT consulting and Software Services that enables companies to effectively connect, communicate and collaborate with their internal and external customers and peers…” Source: RevenueBase Database · checked Aug 31, 2026
19	Gradwell	Strong evidence	West Bath, United Kingdom	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 Aug 31, 2026
20	Sipcom	Indirect evidence	London, United Kingdom	501-1,000	84 contacts →
	Indirect evidence “Sipcom exists to make you the hero of your business narrative by turning complexity into clarity.” Source: RevenueBase Database · checked Aug 31, 2026
21	Xtravirt	Strong evidence	London, United Kingdom	51-200	83 contacts →
	Strong evidence “Xtravirt is a cloud consulting and managed services business committed to supporting VMware and Omnissa customers across the full IT lifecycle.” Source: RevenueBase Database · checked Aug 31, 2026
22	Excalibur Communications	Strong evidence	Swindon, United Kingdom	51-200	72 contacts →
	Strong evidence “Excalibur provides an end to end business consulting service that offers reliable insight, and expertise in communications and technology.” Source: RevenueBase Database · checked Aug 31, 2026
23	Tuliptech	Partial evidence	Leicester, United Kingdom	51-200	68 contacts →
	Partial evidence “TulipTech drives progress through unmatched Cloud Migration & Management capabilities, DevOps, NetOps, and SecOps.” Source: RevenueBase Database · checked Aug 31, 2026
24	Telappliant	Strong evidence	Manchester, United Kingdom	51-200	67 contacts →
	Strong evidence “Telappliant is an award-winning VoIP and cloud communications provider.” Source: RevenueBase Database · checked Aug 31, 2026
25	Cogeco Peer 1	Indirect evidence	Southampton, United Kingdom	501-1,000	67 contacts →
	Indirect evidence “Cogeco Peer 1 has changed its name to Aptum Technologies.” Source: RevenueBase Database · checked Aug 31, 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 consulting 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 consulting companies.
Partial evidence: Its own public description names part of cloud communications consulting 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 consulting 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 790 cloud communications consulting companies based in the United Kingdom

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Cloud communications consulting companies based in the United Kingdom at a glance

As of Aug 31, 2026

12.1%Verified-email coverage

3.6%Mobile-number coverage

45.2Average contacts per company

1-10Median size (employees)

36.2%Largest-city concentration · London

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

440

11-50

256

51-200

201-500

501-1,000

1,001-5,000

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 consulting 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 consulting 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 consulting 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 consulting 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, 4,313 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 August 31, 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 consulting companies by metro

Cloud communications consulting companies in London286
Cloud communications consulting companies in Manchester27

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 consulting 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 consulting companies are there based in the United Kingdom?

RevenueBase identified 790 cloud communications consulting companies headquartered in the United Kingdom as of August 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?

Shoretel, headquartered in White Waltham Maidenhead, tops this list with the largest team on record.

Which city has the most cloud communications consulting companies?

London leads with 286 headquartered companies, followed by Manchester (27) and Leeds (17).

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 4,313 verified decision-maker contacts tracked across these 790 companies.

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.

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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.