Company lists · Data refreshed August 2026

Top 25 Cloud communications platforms based in the United Kingdom

Name: Cloud communications platforms 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 172 companies tracked

RevenueBase identified 172 cloud communications platforms headquartered in the United Kingdom as of August 2026 and tracks 7,464 professional contacts across them, including 2,826 with verified work emails and 1,208 with mobile numbers. London is the largest hub.

This list covers cloud communications platforms 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

172Companies

7,464Contacts tracked

2,826Verified emails

1,208Mobile numbers

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The 25 largest cloud communications platforms based in the United Kingdom

Ranked by team size

Top 25 of 172 cloud communications platforms 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 platforms: 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	8x8	Indirect evidence	Aylesbury, United Kingdom	1,001-5,000	2,427 contacts →
	Indirect evidence “8x8, Inc.(NASDAQ: EGHT) believes that CX limits were meant to be shattered.” Source: RevenueBase Database · checked Aug 31, 2026
2	Full Creative	Indirect evidence	Edinburgh, United Kingdom	501-1,000	756 contacts →
	Indirect evidence “FULL Creative is a Portland-based product company with offices in India (Chennai), Canada (Toronto) and the United Kingdom (Edinburgh).” Source: RevenueBase Database · checked Aug 31, 2026
3	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
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	Imimobile Part Of Webex	Indirect evidence	London, United Kingdom	1,001-5,000	436 contacts →
	Indirect evidence “We've moved!” Source: RevenueBase Database · checked Aug 31, 2026
6	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
7	Synacor	Partial evidence	London, United Kingdom	201-500	182 contacts →
	Partial evidence “Synacor is a cloud-based software and services company headquartered in Buffalo, New York with offices across the globe.” Source: RevenueBase Database · checked Aug 31, 2026
8	Vocovo	Partial evidence	Cheltenham, United Kingdom	51-200	165 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Aug 31, 2026
9	Luware	Strong evidence	London, United Kingdom	51-200	154 contacts →
	Strong evidence “Luware builds intelligent, cloud-native CX solutions that unlock the full potential of Microsoft Teams for enterprise communication.” Source: RevenueBase Database · checked Aug 31, 2026
10	NTT Ltd. Collaboration & CX	Indirect evidence	London, United Kingdom	10001+	120 contacts →
	Indirect evidence “The Collaboration and CX solutions offered by NTT Ltd.” Source: RevenueBase Database · checked Aug 31, 2026
11	Daktela	Indirect evidence	Chester, United Kingdom	51-200	98 contacts →
	Indirect evidence “Daktela is all-in-one contact center solution perfectly suited for small and mid-size businesses.” Source: RevenueBase Database · checked Aug 31, 2026
12	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
13	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
14	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
15	Britannic	Partial evidence	Guildford, United Kingdom	51-200	65 contacts →
	Partial evidence “At Britannic, we are dedicated to revolutionising business communications and driving digital transformation.” Source: RevenueBase Database · checked Aug 31, 2026
16	Nebula	Partial evidence	Guildford, United Kingdom	51-200	60 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 Aug 31, 2026
17	Digitalk	Strong evidence	Milton Keynes, United Kingdom	51-200	58 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 Aug 31, 2026
18	Firstcom Europe LTD	Partial evidence	Bolton, United Kingdom	51-200	55 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 Aug 31, 2026
19	Microtalk	Strong evidence	London, United Kingdom	11-50	44 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 Aug 31, 2026
20	SVL	Strong evidence	East Kilbride, United Kingdom	11-50	35 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 Aug 31, 2026
21	Quickblox	Strong evidence	London, United Kingdom	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 Aug 31, 2026
22	Mission Labs	Partial evidence	Manchester, United Kingdom	51-200	29 contacts →
	Partial evidence “At Mission Labs we have a single vision: to power the future of business communications.” Source: RevenueBase Database · checked Aug 31, 2026
23	Radius Connect Solutions Ireland	Indirect evidence	Belfast, United Kingdom	11-50	26 contacts →
	Indirect evidence “Welcome to Radius Connect Solutions.” Source: RevenueBase Database · checked Aug 31, 2026
24	Marlin Communications	Partial evidence	London, United Kingdom	11-50	22 contacts →
	Partial evidence “Marlin Communications is a UK-based, single-source provider of business communications technology solutions that helps organisations improve customer experiences and optimise how…” Source: RevenueBase Database · checked Aug 31, 2026
25	Meetingzone	Indirect evidence	Thame, United Kingdom	51-200	18 contacts →
	Indirect evidence “MeetingZone was set up in 2002 and has operations in the UK, Germany, USA, Nordics and Asia Pacific.” 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 platforms. 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 platforms.
Partial evidence: Its own public description names part of cloud communications platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud communications platforms. 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 172 cloud communications platforms based in the United Kingdom

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Cloud communications platforms based in the United Kingdom at a glance

As of Aug 31, 2026

37.9%Verified-email coverage

16.2%Mobile-number coverage

43.4Average contacts per company

11-50Median size (employees)

29.7%Largest-city concentration · London

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 platforms, 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 platforms”. 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 platforms), 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 platforms, 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, 2,826 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 platforms by metro

Cloud communications platforms in London51

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 platforms, 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 platforms are there based in the United Kingdom?

RevenueBase identified 172 cloud communications platforms 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?

8x8, headquartered in Aylesbury, tops this list with the largest team on record.

Which city has the most cloud communications platforms?

London leads with 51 headquartered companies, followed by Manchester (8) and Guildford (3).

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 2,826 verified decision-maker contacts tracked across these 172 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.