Company lists · Data verified August 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 Verified Aug 28, 2026 328 companies tracked

There are 328 enterprise voip providers headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Bonline	London	51-200	172	41
2	Gradwell	West Bath	51-200	85	43
3	Sipcom	London	501-1,000	84	28
4	Telappliant	Manchester	51-200	67	44
5	Prestige Telecom Group	Gosport	51-200	44	17
6	Lister Unified Communications	Stonehouse	11-50	32	16
7	Voicemailtel	Haslemere	51-200	29	8
8	Comms Connect	n/a	11-50	29	6
9	NTA LTD	Romford	11-50	25	14
10	Wavetel Business LTD	London	51-200	21	8
11	Birmingham Telecommunications Limited	Coleshill	11-50	19	10
12	Voipstudio	London	51-200	17	4
13	GPS Telecom	n/a	11-50	15	11
14	Packnet Limited	Daresbury	11-50	13	7
15	Splicecom LTD	Chorleywood	51-200	13	5
16	Connect Comms	Manchester	11-50	12	11
17	IP Office LTD	Exeter	11-50	12	4
18	In2tel, An 8x8 Communications Company	Telford	11-50	10	7
19	Y-Our Network Group LTD	n/a	11-50	10	3
20	Nexus IP	London	11-50	10	3
21	The Real PBX	Snodland	11-50	10	1
22	BDM Voice	Burgess Hill	11-50	9	2
23	Vanillaip	Croydon	51-200	8	7
24	Voxbit	Belfast	11-50	8	4
25	Voipon	Chelmsford	11-50	8	4

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 Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 73 HQs

133Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

167

11-50

129

51-200

201-500

501-1,000

10001+

Enterprise voip providers by metro

Metro	Companies
Enterprise voip providers in London	73
Enterprise voip providers in Birmingham	8
Enterprise voip providers in Manchester	7
Enterprise voip providers in Leeds	6
Enterprise voip providers in Sheffield	4
Enterprise voip providers in Milton Keynes	4
Enterprise voip providers in Oakham	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “enterprise voip providers”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 328 enterprise voip providers headquartered in the United Kingdom as of August 2026 (RevenueBase).

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 is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.