Company lists · Data refreshed November 2026

Top 25 Outbound call center services based in the United Kingdom

RevenueBase identified 500 company matches for outbound call center services associated with the United Kingdom as of November 2026 and tracks 6,897 professional contacts across them, including 1,044 with verified work emails. London is the largest hub.

This list covers company matches for outbound call center services associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Nov 5, 2026 How this list was built
500Companies
6,897Contacts tracked
1,044Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest outbound call center services based in the United Kingdom

Ranked by team size
Top 25 of 500 company matches for outbound call center services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSheffield, United KingdomHQ recorded Nov 5, 2026501-1,000347 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchBrighton, United KingdomHQ recorded Nov 5, 2026201-500280 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchHull, United KingdomHQ recorded Nov 5, 2026501-1,000205 contacts →

Exact match

“Established since 1998 Clearanswer is an expert provider of contact centre solutions.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchBristol, United KingdomHQ recorded Nov 5, 20261,001-5,000148 contacts →

Exact match

“Dedicated and shared contact centre outsourcing operations.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchBirmingham, United KingdomHQ recorded Nov 5, 202651-200130 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchExeter, United KingdomHQ recorded Nov 5, 202651-200120 contacts →

Exact match

“Established in 2016, Air Marketing is a specialist B2B outsourced sales and lead generation partner.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchStevenage, United KingdomHQ recorded Nov 5, 2026201-500118 contacts →

Exact match

“Step Change Outsourcing is a growing contact centre working in partnership with some of the UK’s largest brands for over 15 years.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchGlasgow, United KingdomHQ recorded Nov 5, 202651-200106 contacts →

Exact match

“Pursuit Marketing are Experts in Demand Generation, Telemarketing, Digital Marketing and Creative Design - your 360 Marketing Provider.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Nov 5, 2026201-500102 contacts →

Exact match

“Founded in 1988, RSVP is the oldest provider of contact centre services in the UK.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchBristol, United KingdomHQ recorded Nov 5, 202651-20081 contacts →

Exact match

“We are Subfero.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchBanbury, United KingdomHQ recorded Nov 5, 202651-20069 contacts →

Exact match

“At Contact Web, we deliver customer experience outsourcing differently.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Nov 5, 20261,001-5,00061 contacts →

Exact match

“CallCare is your outsourced contact centre and customer service partner.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchRomsey, United KingdomHQ recorded Nov 5, 2026201-50058 contacts →

Exact match

“We are an established AI-enabled call centre specialising in every aspect of sales and customer service.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchEllesmere Port, United KingdomHQ recorded Nov 5, 202651-20054 contacts →

Exact match

“Advance Connects are a B2B telemarketing, lead generation & appointment scheduling experts, operating within various sectors including construction, built environment, industrial…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchWrexham, United KingdomHQ recorded Nov 5, 202651-20053 contacts →

Exact match

“Orca offers flexible and adaptable call answering and live chat services that help clients manage costs effectively.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Nov 5, 202651-20053 contacts →

Exact match

“Direct Response can provide outsourcing of voice, data and contact centre services for organisation from a global business to a one-man operation, delivering outstanding service…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 5, 202651-20048 contacts →

Exact match

“We find ourselves in an era of remarkable technological advancement.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchShadsworth Business Park, United KingdomHQ recorded Nov 5, 202651-20047 contacts →

Exact match

“From planning & recruiting to training & delivery, we provide unbeatable outsourcing services that are not only cost effective but surpass the average UK skill set.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchLeeds, United KingdomHQ recorded Nov 5, 202651-20046 contacts →

Exact match

“B2B and B2C outsourced Telemarketing agency.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchSouthend On Sea, United KingdomHQ recorded Nov 5, 202611-5044 contacts →

Exact match

“Beanstalk is an integrated B2B Telemarketing and Lead Generation agency dedicated to helping our customers win new business.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchTavistock, United KingdomHQ recorded Nov 5, 202611-5044 contacts →

Exact match

“We set appointments with your buyers.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchPortsmouth, United KingdomHQ recorded Nov 5, 202611-5043 contacts →

Exact match

“4Marketing is a direct marketing agency devoted to generating new business opportunities for its clients through its focused new generation of telemarketing professionals.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchBristol, United KingdomHQ recorded Nov 5, 202611-5042 contacts →

Exact match

“Highly qualified B2B Sales Appointments you can trust.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24Exact matchGlasgow, United KingdomHQ recorded Nov 5, 202611-5042 contacts →

Exact match

“Founded in 2002, eContact Services is a telemarketing agency specializing in lead generation and appointment setting for communication service providers-fixed and mobile…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25Exact matchCroydon, United KingdomHQ recorded Nov 5, 2026501-1,00040 contacts →

Exact match

“For over 20 years, Chase Response has delivered unrivalled standards in call centre outsourcing and customer management services.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 500 outbound call center services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,044 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Outbound call center services based in the United Kingdom at a glance

As of Nov 5, 2026
15.1%Verified-email coverage
13.8Average contacts per company
11-50Median size (employees)
20.4%Largest-city concentration · London
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
230
11-50
161
51-200
61
201-500
25
501-1,000
6
1,001-5,000
4

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 500 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “outbound call center services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,044 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Outbound call center services by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “outbound call center services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many outbound call center services are there based in the United Kingdom?

RevenueBase identified 500 company matches for outbound call center services associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

ANT Marketing tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most outbound call center services?

London leads with 102 company records, followed by Leeds (15) and Manchester (15).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,044 professional contacts with verified work emails tracked across these 500 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 500 outbound call center services based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

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 SmartSearch, 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.