Company lists · Data refreshed September 2026

Top 25 Enterprise voip providers based in the United Kingdom

Name: Enterprise voip 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 2, 2026 328 companies tracked

RevenueBase identified 328 enterprise voip providers headquartered in the United Kingdom as of September 2026 and tracks 2,939 professional contacts across them, including 635 with verified work emails and 133 with mobile numbers. London is the largest hub.

This list covers enterprise voip 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 2, 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 Sep 2, 2026 86% judged on-target in blind review

328Companies

2,939Contacts tracked

635Verified emails

133Mobile numbers

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The 25 largest enterprise voip providers based in the United Kingdom

Ranked by team size

Top 25 of 328 enterprise voip providers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise voip 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 Kingdom	51-200	172 contacts →
	Partial evidence “bOnline is UK’s leading provider of VoIP services for micro and small businesses.” Source: RevenueBase Database · checked Sep 2, 2026
2	Gradwell	Indirect evidence	West Bath, United Kingdom	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 2, 2026
3	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 Sep 2, 2026
4	Telappliant	Partial evidence	Manchester, United Kingdom	51-200	67 contacts →
	Partial evidence “Telappliant is an award-winning VoIP and cloud communications provider.” Source: RevenueBase Database · checked Sep 2, 2026
5	Prestige Telecom Group	Partial evidence	Gosport, United Kingdom	51-200	44 contacts →
	Partial evidence “We help UK companies cut costs, stay connected, and scale smarter - with VoIP, mobile and broadband solutions that actually work.” Source: RevenueBase Database · checked Sep 2, 2026
6	Lister Unified Communications	Indirect evidence	Stonehouse, United Kingdom	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 2, 2026
7	Voicemailtel	Partial evidence	Haslemere, United Kingdom	51-200	29 contacts →
	Partial evidence “VoiceMailTel is a high tech innovator and service provider of a unified telecommunication solution which effectively integrates PSTN, VoIP, cellular, voicemail into an…” Source: RevenueBase Database · checked Sep 2, 2026
8	Comms Connect	Indirect evidence	United Kingdom	11-50	29 contacts →
	Indirect evidence “Comms Connect is an independent B2B telecommunications provider, specialising in providing business communication solutions.” Source: RevenueBase Database · checked Sep 2, 2026
9	NTA LTD	Partial evidence	Romford, United Kingdom	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 2, 2026
10	Wavetel Business LTD	Partial evidence	London, United Kingdom	51-200	21 contacts →
	Partial evidence “Wavetel is one of the top VoIP Phone System and Telecom Services Providers in the UK.” Source: RevenueBase Database · checked Sep 2, 2026
11	Birmingham Telecommunications Limited	Indirect evidence	Coleshill, United Kingdom	11-50	19 contacts →
	Indirect evidence “We are an established telecom service provider taking SMEs to the Cloud using our 18 years of experience, superior customer support and competitive pricing.” Source: RevenueBase Database · checked Sep 2, 2026
12	Voipstudio	Indirect evidence	London, United Kingdom	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 2, 2026
13	GPS Telecom	Partial evidence	United Kingdom	11-50	15 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 2, 2026
14	Packnet Limited	Indirect evidence	Daresbury, United Kingdom	11-50	13 contacts →
	Indirect evidence “We are a telecommunications company based in Daresbury, Cheshire, in northwest England.” Source: RevenueBase Database · checked Sep 2, 2026
15	Splicecom LTD	Indirect evidence	Chorleywood, United Kingdom	51-200	13 contacts →
	Indirect evidence “British based Splicecom is the Channel focussed Voice Solution provider offering enhanced voice services deployed in the cloud, on–premise or any blend of the two.” Source: RevenueBase Database · checked Sep 2, 2026
16	Connect Comms	Indirect evidence	Manchester, United Kingdom	11-50	12 contacts →
	Indirect evidence “At Connect Comms we are committed to supplying all our customers with a first-class service from start to finish for no extra expense.” Source: RevenueBase Database · checked Sep 2, 2026
17	IP Office LTD	Indirect evidence	Exeter, United Kingdom	11-50	12 contacts →
	Indirect evidence “IP Office Ltd is a leading supplier of business communications and IT services.” Source: RevenueBase Database · checked Sep 2, 2026
18	In2tel, An 8x8 Communications Company	Partial evidence	Telford, United Kingdom	11-50	10 contacts →
	Partial evidence “in2tel provides reliable and feature-rich business VoIP through phone lines, phone systems, and contact centre solutions.” Source: RevenueBase Database · checked Sep 2, 2026
19	Y-Our Network Group LTD	Indirect evidence	United Kingdom	11-50	10 contacts →
	Indirect evidence “Y-our Network Group provides modern, reliable telecoms solutions designed specifically for small and medium-sized businesses across the UK.” Source: RevenueBase Database · checked Sep 2, 2026
20	Nexus IP	Indirect evidence	London, United Kingdom	11-50	10 contacts →
	Indirect evidence “Nexus IP have been providing business telephony nationwide for over 30 years.” Source: RevenueBase Database · checked Sep 2, 2026
21	The Real PBX	Indirect evidence	Snodland, United Kingdom	11-50	10 contacts →
	Indirect evidence “The Real PBX is a leading provider of unified cloud communication services to consumers and businesses.” Source: RevenueBase Database · checked Sep 2, 2026
22	BDM Voice	Indirect evidence	Burgess Hill, United Kingdom	11-50	9 contacts →
	Indirect evidence “If you feel that your business telephone system no longer meets the needs of your business then why not talk to us?” Source: RevenueBase Database · checked Sep 2, 2026
23	Vanillaip	Indirect evidence	Croydon, United Kingdom	51-200	8 contacts →
	Indirect evidence “VanillaIP is a leading UK provider of real-time, integrated communication solutions in the Cloud.” Source: RevenueBase Database · checked Sep 2, 2026
24	Voxbit	Indirect evidence	Belfast, United Kingdom	11-50	8 contacts →
	Indirect evidence “Voxbit is reinventing the business phone by merging the worlds of cloud computing, web services & telecommunications to make collaborating part of the team.” Source: RevenueBase Database · checked Sep 2, 2026
25	Voipon	Indirect evidence	Chelmsford, United Kingdom	11-50	8 contacts →
	Indirect evidence “VoIPon is a worldwide business to business distributor of the highest quality voice over IP hardware.” Source: RevenueBase Database · checked Sep 2, 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: enterprise voip 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 enterprise voip providers.
Partial evidence: Its own public description names part of enterprise voip providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise voip 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 328 enterprise voip providers based in the United Kingdom

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Enterprise voip providers based in the United Kingdom at a glance

As of Sep 2, 2026

21.6%Verified-email coverage

4.5%Mobile-number coverage

9.0Average contacts per company

1-10Median size (employees)

22.3%Largest-city concentration · London

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

167

11-50

129

51-200

201-500

501-1,000

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 enterprise voip 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 “enterprise voip 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 enterprise voip 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 enterprise voip 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, 635 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 2, 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.

Enterprise voip providers by metro

Enterprise voip providers in London73

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 enterprise voip 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 enterprise voip providers are there based in the United Kingdom?

RevenueBase identified 328 enterprise voip 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 enterprise voip providers?

London leads with 73 headquartered companies, followed by Birmingham (8) and Manchester (7).

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 635 verified decision-maker contacts tracked across these 328 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 2, 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.