Company lists · Data refreshed September 2026

Top 25 Managed voip service providers based in the United Kingdom

Name: Managed voip service providers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 326 companies tracked

RevenueBase identified 326 managed voip service providers headquartered in the United Kingdom as of September 2026 and tracks 2,278 professional contacts across them, including 697 with verified work emails. London is the largest hub.

This list covers managed voip service providers 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 September 20, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

326Companies

2,278Contacts tracked

697Verified emails

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The 25 largest managed voip service providers based in the United Kingdom

Ranked by team size

Top 25 of 326 managed voip service providers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to managed voip service providers: 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	Bonline	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	170 contacts →
	Partial evidence “bOnline is UK’s leading provider of VoIP services for micro and small businesses.” Source: RevenueBase Database · checked Sep 20, 2026
2	YO Telecom	Indirect evidence	Southampton, United KingdomHQ checked Sep 20, 2026	51-200	97 contacts →
	Indirect evidence “Yo Telecom is an award winning telecommunications provider that specialises in small to medium sized businesses.” Source: RevenueBase Database · checked Sep 20, 2026
3	Wavecrest	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	93 contacts →
	Partial evidence “Wavecrest is a global managed voice and messaging services company.” Source: RevenueBase Database · checked Sep 20, 2026
4	Bicom Systems	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	90 contacts →
	Indirect evidence “Made for businesses of all sizes, Bicom Systems revolutionizes communications by providing PBXware, the world's most unified turnkey open standards hosted telephony platform, plus…” Source: RevenueBase Database · checked Sep 20, 2026
5	Gradwell	Indirect evidence	Bath, United KingdomHQ checked Sep 20, 2026	51-200	85 contacts →
	Indirect 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 Sep 20, 2026
6	Telappliant	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	67 contacts →
	Partial evidence “Telappliant is an award-winning VoIP and cloud communications provider.” Source: RevenueBase Database · checked Sep 20, 2026
7	Cellular Solutions	Indirect evidence	Sunderland, United KingdomHQ checked Sep 20, 2026	n/a	56 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
8	XINIX	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	43 contacts →
	Indirect evidence “Xinix is UK’s leading cloud-based unified communication provider making persistent efforts towards modernizing business communications.” Source: RevenueBase Database · checked Sep 20, 2026
9	Lister Unified Communications	Indirect evidence	Stonehouse, United KingdomHQ checked Sep 20, 2026	11-50	32 contacts →
	Indirect evidence “At Lister Unified Communications we understand that everyone’s business telephone requirements are different.” Source: RevenueBase Database · checked Sep 20, 2026
10	Comms Connect	Indirect evidence	Hertfordshire, United KingdomHQ checked Sep 20, 2026	11-50	29 contacts →
	Indirect evidence “Comms Connect is an award-winning UK provider of business communications, connectivity and energy solutions, helping organisations stay connected, productive and competitive.” Source: RevenueBase Database · checked Sep 20, 2026
11	NTA LTD	Partial evidence	Romford, United KingdomHQ checked Sep 20, 2026	11-50	25 contacts →
	Partial evidence “NTA Ltd are a UK based VoIP Carrier - Hosted Telephony in your name & branding, utilising our network infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
12	Mainstream Digital	Indirect evidence	Cirencester, United KingdomHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “Mainstream Digital – Communications Solutions for Business Mainstream Digital is a Business Communications solutions provider with over 20 years of telecommunications experience.” Source: RevenueBase Database · checked Sep 20, 2026
13	Pinevox	Indirect evidence	Harrow, United KingdomHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “With a legacy rooted in two decades of telecom consulting and services expertise, PineVox emerges as a visionary leader in the industry.” Source: RevenueBase Database · checked Sep 20, 2026
14	Magrathea Telecommunications LTD	Partial evidence	Theale, United KingdomHQ checked Sep 20, 2026	11-50	23 contacts →
	Partial evidence “Magrathea have been wholesale VoIP experts for over 25 years.” Source: RevenueBase Database · checked Sep 20, 2026
15	Wavetel Business LTD	Partial evidence	Basildon, United KingdomHQ checked Sep 20, 2026	51-200	20 contacts →
	Partial evidence “Wavetel is one of the top VoIP Phone System and Telecom Services Providers in the UK.” Source: RevenueBase Database · checked Sep 20, 2026
16	Birmingham Telecommunications Limited	Partial evidence	Coleshill, United KingdomHQ checked Sep 20, 2026	11-50	19 contacts →
	Partial evidence “Since 2006, Birmingham Telecom has been helping businesses across the UK with reliable business telecoms, Managed IT Support, Cyber Security and Connectivity Solutions.” Source: RevenueBase Database · checked Sep 20, 2026
17	9eons Limited	Indirect evidence	Milton Keynes, United KingdomHQ checked Sep 20, 2026	11-50	19 contacts →
	Indirect evidence “9Eons provides a comprehensive suite of voice and data services to a wide variety of customers: from Mobile operators to residential users.” Source: RevenueBase Database · checked Sep 20, 2026
18	Voipfone	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	19 contacts →
	Indirect evidence “Voipfone is an Internet Telephone Service provided by iNet Telecoms Ltd.” Source: RevenueBase Database · checked Sep 20, 2026
19	Voipstudio	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	17 contacts →
	Indirect evidence “VoIPstudio is a complete business phone system and scalable call center with small business pricing.” Source: RevenueBase Database · checked Sep 20, 2026
20	Pocket Receptionist	Strong evidence	Lowestoft, United KingdomHQ checked Sep 20, 2026	11-50	16 contacts →
	Strong evidence “Professional Telephone Answering Service, Fully Managed Live Chat & Business VoIP Phone System” Source: RevenueBase Database · checked Sep 20, 2026
21	GPS Telecom	Partial evidence	Cheshire, United KingdomHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “At GPS Telecom, we help UK businesses stay connected with reliable, straightforward telecoms solutions, from VoIP phone systems to business mobile plans and fast, secure internet…” Source: RevenueBase Database · checked Sep 20, 2026
22	Elementel LTD	Partial evidence	Romsey, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Partial evidence “ElemenTel are a leading provider of next generation voice over internet (VoIP) telephony solutions to businesses of all types and sizes.” Source: RevenueBase Database · checked Sep 20, 2026
23	Fusion Communications	Indirect evidence	Staffordshire, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Fusion Communications helps UK businesses take control of their communications set-up, cutting unnecessary costs, removing inflexible contracts, and replacing poor support with a…” Source: RevenueBase Database · checked Sep 20, 2026
24	Cobus Communications Group	Indirect evidence	Kingston Upon Hull, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “We're experienced in all forms of Unified Communications and have been delivering superior solutions to businesses of all sizes and across all sectors, from our Head Office in…” Source: RevenueBase Database · checked Sep 20, 2026
25	Digicomm 360 LTD	Indirect evidence	Bolton, United KingdomHQ checked Sep 20, 2026	1-10	15 contacts →
	Indirect evidence “IT and Telecoms Experts with over 100 years of collective expertise, backed up with experience and award wins, we fully understand how effective communications can help an…” Source: RevenueBase Database · checked Sep 20, 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: managed voip service providers. 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 managed voip service providers.
Partial evidence: Its own public description names part of managed voip service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name managed voip service providers. 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 326 managed voip service providers based in the United Kingdom

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Managed voip service providers based in the United Kingdom at a glance

As of Sep 20, 2026

30.6%Verified-email coverage

7.0Average contacts per company

1-10Median size (employees)

21.2%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

167

11-50

133

51-200

201-500

501-1,000

5,001-10,000

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 326 companies.

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 managed voip service providers, 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 “managed voip service providers”. 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 managed voip service providers), 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 managed voip service providers, 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, 697 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 September 20, 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.

Managed voip service providers by metro

Managed voip service providers in London69

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 managed voip service providers, 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 managed voip service providers are there based in the United Kingdom?

RevenueBase identified 326 managed voip service providers headquartered in the United Kingdom as of September 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?

Bonline, headquartered in London, tops this list with the largest team on record.

Which city has the most managed voip service providers?

London leads with 69 headquartered companies, followed by Manchester (7) and Birmingham (6).

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 697 verified decision-maker contacts tracked across these 326 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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.