Company lists · Data refreshed August 2026

Top 25 Collaboration and communication software companies based in the United Kingdom

Name: Collaboration and communication software 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 122 companies tracked

RevenueBase identified 122 collaboration and communication software companies headquartered in the United Kingdom as of August 2026 and tracks 2,995 professional contacts across them, including 890 with verified work emails and 408 with mobile numbers. London is the largest hub.

This list covers collaboration and communication software 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

122Companies

2,995Contacts tracked

890Verified emails

408Mobile numbers

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The 25 largest collaboration and communication software companies based in the United Kingdom

Ranked by team size

Top 25 of 122 collaboration and communication software 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 collaboration and communication software 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	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
2	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
3	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
4	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
5	Onlyoffice	Indirect evidence	London, United Kingdom	51-200	125 contacts →
	Indirect evidence “ONLYOFFICE is a project developed by experienced IT experts from Ascensio System SIA, leading IT company with headquarters in Riga, Latvia.” Source: RevenueBase Database · checked Aug 31, 2026
6	NTT Ltd. Collaboration & CX	Partial evidence	London, United Kingdom	10001+	120 contacts →
	Partial evidence “The Collaboration and CX solutions offered by NTT Ltd.” Source: RevenueBase Database · checked Aug 31, 2026
7	Involve Visual Collaboration	Partial evidence	Weymouth, United Kingdom	51-200	96 contacts →
	Partial evidence “Involve is the UK leader in the creation, design and support of Visual Collaboration business solutions.” Source: RevenueBase Database · checked Aug 31, 2026
8	Element	Partial evidence	London, United Kingdom	51-200	85 contacts →
	Partial evidence “Element is a new type of communications platform.” Source: RevenueBase Database · checked Aug 31, 2026
9	XAIT	Strong evidence	Cheltenham, United Kingdom	51-200	78 contacts →
	Strong evidence “Xait is a global Software Technology Company dedicated to empowering enterprise customers with cutting-edge solutions for document co-authoring, automation, collaboration, and…” Source: RevenueBase Database · checked Aug 31, 2026
10	VIJU	Indirect evidence	London, United Kingdom	201-500	70 contacts →
	Indirect evidence “On the 6th of February 2018, Viju and VisionsConnected officially terminated their previous company names, and created a new brand, Kinly We provide secure and flexible visual…” Source: RevenueBase Database · checked Aug 31, 2026
11	Nebula	Strong evidence	Guildford, United Kingdom	51-200	60 contacts →
	Strong 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
12	Avocor	Partial evidence	Clerkenwell, United Kingdom	51-200	48 contacts →
	Partial evidence “Avocor stands out as a worldwide frontrunner in collaboration display solutions, offering an ideal display for every setting.” Source: RevenueBase Database · checked Aug 31, 2026
13	Visavvi, An SCC Business	Strong evidence	Farnborough, United Kingdom	51-200	48 contacts →
	Strong evidence “We are the newest and most exciting name in the dynamic world of #audiovisual, business #communication and #collaboration.” Source: RevenueBase Database · checked Aug 31, 2026
14	Newline Interactive Europe	Partial evidence	London, United Kingdom	501-1,000	47 contacts →
	Partial evidence “We make collaboration easier.” Source: RevenueBase Database · checked Aug 31, 2026
15	VQ Communications	Partial evidence	Chippenham, United Kingdom	51-200	44 contacts →
	Partial evidence “Our software and expertise put you on the fast-track to modern, self-hosted conferencing with Cisco.” Source: RevenueBase Database · checked Aug 31, 2026
16	Unify Square	Indirect evidence	Leeds, United Kingdom	n/a	44 contacts →
	Indirect evidence “Unify Square joined Unisys in June 2021 to help our clients create breakthrough employee experiences across devices and platforms as workflows change and evolve.” Source: RevenueBase Database · checked Aug 31, 2026
17	Code Software	Indirect evidence	Northleach, United Kingdom	11-50	32 contacts →
	Indirect evidence “At Code we’ve been creating strategies for productivity and efficiency in a digitally connected world for a decade.” Source: RevenueBase Database · checked Aug 31, 2026
18	Othership	Indirect evidence	London, United Kingdom	11-50	27 contacts →
	Indirect evidence “Othership helps teams and individuals coordinate how work happens-bringing clarity to who should work together, where, and when.” Source: RevenueBase Database · checked Aug 31, 2026
19	Kolekti	Indirect evidence	London, United Kingdom	51-200	26 contacts →
	Indirect evidence “We've got an app to help you work better – together and apart.” Source: RevenueBase Database · checked Aug 31, 2026
20	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
21	Firstclass	Strong evidence	Beaconsfield, United Kingdom	1,001-5,000	17 contacts →
	Strong evidence “FirstClass is a fully integrated suite of applications designed to enhance communication, collaboration, and knowledge sharing within education and corporate environments.” Source: RevenueBase Database · checked Aug 31, 2026
22	Bridgehampton	Indirect evidence	Strand, United Kingdom	11-50	16 contacts →
	Indirect evidence “The modern workplace is changing – but people will always be at its core.” Source: RevenueBase Database · checked Aug 31, 2026
23	Kahootz	Indirect evidence	Weston, United Kingdom	11-50	15 contacts →
	Indirect evidence “Kahootz can bring everyone together in secure online workspaces, which can be configured for your specific business purpose.” Source: RevenueBase Database · checked Aug 31, 2026
24	Ipcortex	Partial evidence	Milton Keynes, United Kingdom	11-50	15 contacts →
	Partial evidence “With over 15 years’ experience in the ever-changing communications industry, IPCortex are proud to provide innovative communication systems and applications that help companies…” Source: RevenueBase Database · checked Aug 31, 2026
25	HEED	Partial evidence	London, United Kingdom	11-50	15 contacts →
	Partial evidence “Heed is a leading provider of innovative communication solutions for the modern workplace.” 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: collaboration and communication software 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 collaboration and communication software companies.
Partial evidence: Its own public description names part of collaboration and communication software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name collaboration and communication software 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 122 collaboration and communication software companies based in the United Kingdom

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Collaboration and communication software companies based in the United Kingdom at a glance

As of Aug 31, 2026

29.7%Verified-email coverage

13.6%Mobile-number coverage

24.5Average contacts per company

11-50Median size (employees)

47.5%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 collaboration and communication software 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 “collaboration and communication software 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 collaboration and communication software 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 collaboration and communication software 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, 890 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.

Collaboration and communication software companies by metro

Collaboration and communication software companies in London58

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 collaboration and communication software 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 collaboration and communication software companies are there based in the United Kingdom?

RevenueBase identified 122 collaboration and communication software 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?

Full Creative, headquartered in Edinburgh, tops this list with the largest team on record.

Which city has the most collaboration and communication software companies?

London leads with 58 headquartered companies, followed by Bristol (3) and Leeds (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 890 verified decision-maker contacts tracked across these 122 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.