Company lists · Data refreshed September 2026

Top 25 Offshore call centers based in the United Kingdom

RevenueBase identified 116 company matches for offshore call centers associated with the United Kingdom as of September 2026 and tracks 2,184 professional contacts across them, including 207 with verified work emails. London is the largest hub.

This list covers company matches for offshore call centers 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 September 29, 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 Sep 29, 2026 How this list was built
116Companies
2,184Contacts tracked
207Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest offshore call centers based in the United Kingdom

Ranked by team size
Top 25 of 116 company matches for offshore call centers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 Sep 29, 2026501-1,000327 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchBirkenhead, United KingdomHQ recorded Sep 29, 20261,001-5,000312 contacts →

Exact match

“Here at The Contact Company, we add value for clients, working as trusted partners to manage and develop their customer contact processes.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchHull, United KingdomHQ recorded Sep 29, 2026501-1,000205 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchBristol, United KingdomHQ recorded Sep 29, 20261,001-5,000132 contacts →

Exact match

“Dedicated and shared contact centre outsourcing operations.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-20090 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchBury, United KingdomHQ recorded Sep 29, 2026201-50083 contacts →

Exact match

“We are FM Outsource, a modern customer service outsourcer.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchBristol, United KingdomHQ recorded Sep 29, 202651-20083 contacts →

Exact match

“We are Subfero.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-20062 contacts →

Exact match

“Support Adventure is an outsourcing company that specializes in customer service and support.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,00059 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchRomsey, United KingdomHQ recorded Sep 29, 2026201-50054 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 · Sep 29, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-20046 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 · Sep 29, 2026 · View company records in RevenueBase
12Exact matchShadsworth Business Park, United KingdomHQ recorded Sep 29, 202651-20041 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 · Sep 29, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 29, 202611-5040 contacts →

Exact match

“Kingdom Vision is a medium to take your business from good to great.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchCroydon, United KingdomHQ recorded Sep 29, 2026501-1,00039 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 · Sep 29, 2026 · View company records in RevenueBase
15Exact matchLeeds, United KingdomHQ recorded Sep 29, 202651-20032 contacts →

Exact match

“Telu is the complete business solution for generating leads and revenue for your business.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchEast Kilbride, United KingdomHQ recorded Sep 29, 202651-20019 contacts →

Exact match

“AGO Outsourcing is a leading provider of outsourced business services, including inbound and outbound customer service and outbound sales as well as social media engagement…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchЛондон, United KingdomHQ recorded Sep 29, 202651-20016 contacts →

Exact match

“Dealist.solutions, part of "Pivot" LTD, provides outsourcing solutions in the interests, on the instructions and on behalf of the General contractor.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchNewbury, United KingdomHQ recorded Sep 29, 202611-5011 contacts →

Exact match

“UK Outsource Specialists – First Call Helpdesk At First Call Helpdesk, we don’t just provide support-we co-create seamless customer experiences that strengthen businesses.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-20010 contacts →

Exact match

“Indigo 21: Pioneering IT business process outsourcing since 2003.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchBury, United KingdomHQ recorded Sep 29, 202651-2008 contacts →

Exact match

“At Forge Solutions, we redefine call centre services with state-of-the-art technology and tailored solutions.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 29, 20261-107 contacts →

Exact match

“At alaouico, we understand the challenges businesses face with customer interactions-whether it's managing high call volumes, ensuring timely responses, or maintaining customer…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchManchester, United KingdomHQ recorded Sep 29, 20261-106 contacts →

Exact match

“USMAART’s provides business consultancy and outsourcing support to a wide range of clients across multiple sectors.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchAndover, United KingdomHQ recorded Sep 29, 202611-504 contacts →

Exact match

“Angel Call Handling are award winning UK based experts in providing inbound & outbound call handling, Virtual Assistants, PA and admin support to businesses.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchBurgess Hill, United KingdomHQ recorded Sep 29, 202651-2002 contacts →

Exact match

“BDM Talk is an Inbound & Outbound Contact Centre.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchBognor Regis, United KingdomHQ recorded Sep 29, 20261-101 contacts →

Exact match

“Telephone Answering Services Live Chat Answering Customer Services Outbound calling projects Telemarketing Email Marketing Administrative Support”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 116 offshore call centers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 207 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Offshore call centers based in the United Kingdom at a glance

As of Sep 29, 2026
9.5%Verified-email coverage
18.8Average contacts per company
11-50Median size (employees)
31.9%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
34
11-50
35
51-200
29
201-500
7
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 116 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 “offshore call centers” 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 207 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 September 29, 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.

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 “offshore call centers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many offshore call centers are there based in the United Kingdom?

RevenueBase identified 116 company matches for offshore call centers associated with the United Kingdom as of September 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 offshore call centers?

London leads with 37 company records, followed by Bristol (7) and Manchester (5).

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 207 professional contacts with verified work emails tracked across these 116 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 September 29, 2026.

Ready to reach these companies? Verified emails and direct dials for all 116 offshore call centers 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.