Company lists · Data verified August 2026

Top 25 Enterprise connectivity providers based in the United Kingdom

Name: Enterprise connectivity 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 112 companies tracked

There are 112 enterprise connectivity providers headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 3,328 professional contacts across them, including 1,274 with verified work emails and 177 with mobile numbers. London is the largest hub.

This list covers enterprise connectivity 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.

112Companies

3,328Contacts tracked

1,274Verified emails

177Mobile numbers

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The 25 largest enterprise connectivity providers based in the United Kingdom

Ranked by team size

Top 25 of 112 enterprise connectivity 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	Exponential-E	London	501-1,000	661	505
2	PXC	Manchester	1,001-5,000	599	307
3	ZEN Internet	Rochdale	501-1,000	517	4
4	Vorboss	London	201-500	268	155
5	ISG Tech	Brierfield	201-500	76	12
6	MLR Networks LTD	Runcorn	11-50	53	34
7	IIJ Europe	London	51-200	49	1
8	Mobilise	London	51-200	47	26
9	ONEIO	London	51-200	45	36
10	Updata Infrastructure	Reigate	501-1,000	43	8
11	Smartcic Global Services	London	51-200	33	15
12	Cerberus Networks	Greenford	11-50	30	22
13	Core Telecom LTD	Leeds	11-50	27	16
14	Actionpoint Technology Group	Lisburn	201-500	21	9
15	Fastnet	Brighton	11-50	21	9
16	Neutrality Managed Services	London	11-50	18	13
17	Opious	Cranfield	11-50	18	10
18	ELITE	Portsmouth	11-50	16	5
19	Smoad Networks	London	51-200	16	1
20	BT Local Business	Preston	11-50	15	1
21	Jelly Communications	Epsom	11-50	12	5
22	Structured Networks Technology	Chatham	51-200	10	6
23	Amatis Networks	Reading	11-50	10	6
24	NGN	Barnet	11-50	10	3
25	Express Data LTD	Leeds	11-50	9	6

Showing 25 of 112 enterprise connectivity providers based in the United Kingdom

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Enterprise connectivity providers based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 28 HQs

177Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Enterprise connectivity providers by metro

Metro	Companies
Enterprise connectivity providers in London	28
Enterprise connectivity providers in Reading	6
Enterprise connectivity providers in Leeds	5
Enterprise connectivity providers in Manchester	5
Enterprise connectivity providers in Birmingham	3
Enterprise connectivity providers in Portsmouth	2
Enterprise connectivity providers in Newcastle Upon Tyne	2

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 connectivity 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 connectivity providers are there based in the United Kingdom?

There are 112 enterprise connectivity providers headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Exponential-E, headquartered in London, tops this list with the largest team on record.

Which city has the most enterprise connectivity providers?

London leads with 28 headquartered companies, followed by Reading (6) and Leeds (5).

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 1,274 verified decision-maker contacts tracked across these 112 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.