Company lists · Data verified August 2026

Top 25 Contact center as a service providers based in the United Kingdom

Name: Contact center as a service 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 234 companies tracked

There are 234 contact center as a service providers headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 9,591 professional contacts across them, including 3,312 with verified work emails and 1,021 with mobile numbers. London is the largest hub.

This list covers contact center as a 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. Data current as of August 28, 2026.

234Companies

9,591Contacts tracked

3,312Verified emails

1,021Mobile numbers

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The 25 largest contact center as a service providers based in the United Kingdom

Ranked by team size

Top 25 of 234 contact center as a service 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	8x8	Aylesbury	1,001-5,000	2,427	1,335
2	RESQ	Seaham	1,001-5,000	493	149
3	Imimobile Part Of Webex	London	1,001-5,000	436	54
4	ANT Marketing	Sheffield	501-1,000	328	35
5	The Contact Company	Wirral	1,001-5,000	324	17
6	Ventrica	Southend-On-Sea	501-1,000	320	95
7	Vocalcom	Uk	201-500	233	119
8	Calltower	London	201-500	226	128
9	ECKOH	Hemel Hempstead	201-500	202	124
10	Clearanswer Call Centres	Leeds	501-1,000	202	24
11	3clogic	London	51-200	189	120
12	Interact Contact Centres	Richmond	501-1,000	159	75
13	Luware	London	51-200	154	110
14	Echo-U LTD	Newcastle Upon Tyne	201-500	140	7
15	Route 101 LTD	Bristol	51-200	135	93
16	We ARE Woven	Bristol	1,001-5,000	131	11
17	QPC	Birmingham	51-200	116	26
18	Daktela	Chester	51-200	98	72
19	Rsvp Media Response LTD	London	201-500	95	22
20	FM Outsource	Bury	201-500	82	33
21	Business Systems	London	51-200	71	43
22	AKIXI	Crawley	51-200	67	53
23	Nebula	Guildford	51-200	60	29
24	Callcare	London	1,001-5,000	59	13
25	Bulb Tech	Hoddesdon	51-200	57	50

Showing 25 of 234 contact center as a service providers based in the United Kingdom

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Contact center as a service providers based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 57 HQs

1,021Contacts with mobile numbers

7Emails 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

10001+

Contact center as a service providers by metro

Metro	Companies
Contact center as a service providers in London	57
Contact center as a service providers in Manchester	16
Contact center as a service providers in Glasgow	7
Contact center as a service providers in Bristol	7
Contact center as a service providers in Sheffield	6
Contact center as a service providers in Birmingham	4
Contact center as a service providers in Reading	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 “contact center as a service 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; 7 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 contact center as a service providers are there based in the United Kingdom?

There are 234 contact center as a service providers headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

8x8, headquartered in Aylesbury, tops this list with the largest team on record.

Which city has the most contact center as a service providers?

London leads with 57 headquartered companies, followed by Manchester (16) and Glasgow (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 3,312 verified decision-maker contacts tracked across these 234 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.