Company lists · Data refreshed September 2026

Top 25 Marketing call centers based in the United Kingdom

Name: Marketing call centers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 493 companies tracked

RevenueBase identified 493 marketing call centers headquartered in the United Kingdom as of September 2026 and tracks 6,030 professional contacts across them, including 857 with verified work emails. London is the largest hub.

This list covers marketing call centers 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 28, 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 28, 2026 86% judged on-target in blind review

493Companies

6,030Contacts tracked

857Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest marketing call centers based in the United Kingdom

Ranked by team size

Top 25 of 493 marketing call centers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to marketing call centers: 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	ANT Marketing	Indirect evidence	Sheffield, United KingdomHQ checked Sep 28, 2026	501-1,000	327 contacts →
	Indirect evidence “Skilled talent, proven processes and leading technology.” Source: RevenueBase Database · checked Sep 28, 2026
2	The Contact Company	Indirect evidence	Birkenhead, United KingdomHQ checked Sep 28, 2026	1,001-5,000	312 contacts →
	Indirect evidence “Here at The Contact Company, we add value for clients, working as trusted partners to manage and develop their customer contact processes.” Source: RevenueBase Database · checked Sep 28, 2026
3	The Telemarketing Company	Indirect evidence	Brighton, United KingdomHQ checked Sep 28, 2026	201-500	243 contacts →
	Indirect evidence “The Telemarketing Company is one of the UK's most trusted telemarketing agencies, delivering flexible, high-quality voice services, including pre and post sales research…” Source: RevenueBase Database · checked Sep 28, 2026
4	Clearanswer Call Centres	Indirect evidence	Hull, United KingdomHQ checked Sep 28, 2026	501-1,000	205 contacts →
	Indirect evidence “Established since 1998 Clearanswer is an expert provider of contact centre solutions.” Source: RevenueBase Database · checked Sep 28, 2026
5	GCL	Partial evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	51-200	119 contacts →
	Partial evidence “GCL, with its unique, non-scripted approach to telemarketing and related marketing services, has for over 30 years established an enviable reputation for providing winning lead…” Source: RevenueBase Database · checked Sep 28, 2026
6	AIR Marketing	Partial evidence	Exeter, United KingdomHQ checked Sep 28, 2026	51-200	116 contacts →
	Partial evidence “Since 2016, Air Marketing has been the trusted outsourced sales and lead generation agency in the UK for ambitious B2B businesses.” Source: RevenueBase Database · checked Sep 28, 2026
7	EC Outsourcing Powered By Ison Xperiences	Indirect evidence	Doxford International Business Park, United KingdomHQ checked Sep 28, 2026	1,001-5,000	114 contacts →
	Indirect evidence “EC Outsourcing is one of the UK's leading outsourced contact centres.” Source: RevenueBase Database · checked Sep 28, 2026
8	Step Change Outsourcing	Indirect evidence	Stevenage, United KingdomHQ checked Sep 28, 2026	201-500	112 contacts →
	Indirect evidence “Step Change Outsourcing is a growing contact centre working in partnership with some of the UK’s largest brands for over 15 years.” Source: RevenueBase Database · checked Sep 28, 2026
9	Pursuit Marketing	Partial evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	51-200	96 contacts →
	Partial evidence “Pursuit Marketing are Experts in Demand Generation, Telemarketing, Digital Marketing and Creative Design - your 360 Marketing Provider.” Source: RevenueBase Database · checked Sep 28, 2026
10	Youpro Contact	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	90 contacts →
	Indirect evidence “A world class offshore outsourcing agency, with offices in London and Harare, we have access to some of the best educated, best spoken graduates you will find anywhere in the…” Source: RevenueBase Database · checked Sep 28, 2026
11	Voice Marketing LTD	Indirect evidence	Sheffield, United KingdomHQ checked Sep 28, 2026	201-500	75 contacts →
	Indirect evidence “Voice is an agency that specialises in customer acquisition, development and retention programs.” Source: RevenueBase Database · checked Sep 28, 2026
12	Salesar	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	59 contacts →
	Partial evidence “Looking to fill your calendar with qualified calls?” Source: RevenueBase Database · checked Sep 28, 2026
13	Impact Call Centre	Partial evidence	Romsey, United KingdomHQ checked Sep 28, 2026	201-500	54 contacts →
	Partial evidence “We are an established AI-enabled call centre specialising in every aspect of sales and customer service.” Source: RevenueBase Database · checked Sep 28, 2026
14	4marketing	Partial evidence	Portsmouth, United KingdomHQ checked Sep 28, 2026	11-50	47 contacts →
	Partial evidence “4Marketing is a direct marketing agency devoted to generating new business opportunities for its clients through its focused new generation of telemarketing professionals.” Source: RevenueBase Database · checked Sep 28, 2026
15	Advance Connects	Indirect evidence	Ellesmere Port, United KingdomHQ checked Sep 28, 2026	51-200	45 contacts →
	Indirect evidence “Advance Connects are a B2B telemarketing, lead generation & appointment scheduling experts, operating within various sectors including construction, built environment, industrial…” Source: RevenueBase Database · checked Sep 28, 2026
16	Broadley Speaking	Partial evidence	Tavistock, United KingdomHQ checked Sep 28, 2026	11-50	44 contacts →
	Partial evidence “With over three decades of experience, we partner with B2B sales and marketing teams to drive and nurture new customer acquisition - securing conversations with the right…” Source: RevenueBase Database · checked Sep 28, 2026
17	Beanstalk Marketing	Indirect evidence	Southend On Sea, United KingdomHQ checked Sep 28, 2026	11-50	43 contacts →
	Indirect evidence “Beanstalk is an integrated B2B Telemarketing and Lead Generation agency dedicated to helping our customers win new business.” Source: RevenueBase Database · checked Sep 28, 2026
18	Parallel Partnerships LTD	Indirect evidence	Leeds, United KingdomHQ checked Sep 28, 2026	51-200	43 contacts →
	Indirect evidence “B2B and B2C outsourced Telemarketing agency.” Source: RevenueBase Database · checked Sep 28, 2026
19	Chase Response	Partial evidence	Croydon, United KingdomHQ checked Sep 28, 2026	501-1,000	39 contacts →
	Partial evidence “For over 20 years, Chase Response has delivered unrivalled standards in call centre outsourcing and customer management services.” Source: RevenueBase Database · checked Sep 28, 2026
20	Sentrama	Indirect evidence	Bristol, United KingdomHQ checked Sep 28, 2026	11-50	38 contacts →
	Indirect evidence “Highly qualified B2B Sales Appointments you can trust.” Source: RevenueBase Database · checked Sep 28, 2026
21	Econtact Services-Telco Experts	Indirect evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	11-50	37 contacts →
	Indirect evidence “Founded in 2002, eContact Services is a telemarketing agency specializing in lead generation and appointment setting for communication service providers-fixed and mobile…” Source: RevenueBase Database · checked Sep 28, 2026
22	1 Stop Data LTD	Strong evidence	Ewell, United KingdomHQ checked Sep 28, 2026	51-200	35 contacts →
	Strong evidence “1 Stop Data offers the best of breed Marketing, Lead Generation and Call Centre services.” Source: RevenueBase Database · checked Sep 28, 2026
23	Paragon Marketing Projects	Partial evidence	Portsmouth, United KingdomHQ checked Sep 28, 2026	51-200	33 contacts →
	Partial evidence “Working with clients across a variety of sectors, Paragon is a leading provider of B2B lead generation and appointment setting marketing projects with vast experience in creating…” Source: RevenueBase Database · checked Sep 28, 2026
24	TELU	Indirect evidence	Leeds, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Indirect evidence “Telu is the complete business solution for generating leads and revenue for your business.” Source: RevenueBase Database · checked Sep 28, 2026
25	IT Focus Telemarketing LTD	Indirect evidence	Bradford On Avon, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “IT Focus Telemarketing Ltd is an agency that specialises in working with information technology companies.” Source: RevenueBase Database · checked Sep 28, 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: marketing call centers. 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 marketing call centers.
Partial evidence: Its own public description names part of marketing call centers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marketing call centers. 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 493 marketing call centers based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 857 reachable decision-makers.

Free signup · no credit card

View the full list →

Marketing call centers based in the United Kingdom at a glance

As of Sep 28, 2026

14.2%Verified-email coverage

12.2Average contacts per company

1-10Median size (employees)

20.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

253

11-50

162

51-200

201-500

501-1,000

1,001-5,000

10001+

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 493 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 marketing call centers, 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 “marketing call centers”. 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 marketing call centers), 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 marketing call centers, 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, 857 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 28, 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.

Marketing call centers by metro

Marketing call centers in London100

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 marketing call centers, 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 marketing call centers are there based in the United Kingdom?

RevenueBase identified 493 marketing call centers 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?

ANT Marketing, headquartered in Sheffield, tops this list with the largest team on record.

Which city has the most marketing call centers?

London leads with 100 headquartered companies, followed by Manchester (18) and Birmingham (16).

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 857 verified decision-maker contacts tracked across these 493 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 493 marketing call centers based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Marketing call centers by geography

Browse the directory

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.