Company lists · Data refreshed September 2026

Top 25 Customer experience outsourcing services based in the United Kingdom

RevenueBase identified 425 company matches for customer experience outsourcing services associated with the United Kingdom as of September 2026 and tracks 36,964 professional contacts across them, including 7,590 with verified work emails. London is the largest hub.

This list covers company matches for customer experience outsourcing 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 September 28, 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 28, 2026 How this list was built
425Companies
36,964Contacts tracked
7,590Verified emails
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The 25 largest customer experience outsourcing services based in the United Kingdom

Ranked by team size
Top 25 of 425 company matches for customer experience outsourcing services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 matchLondon, United KingdomHQ recorded Sep 28, 202610001+20,824 contacts →

Exact match

“Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 28, 20261,001-5,0001,991 contacts →

Exact match

“We believe customers and employees should be looked after, and every interaction is an opportunity for a conversation and to learn more about them.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchBirmingham, United KingdomHQ recorded Sep 28, 20261,001-5,0001,839 contacts →

Exact match

“We are Sigma Connected, we are different.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchMotherwell, United KingdomHQ recorded Sep 28, 20261,001-5,0001,244 contacts →

Exact match

“Ascensos is now Firstsource.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchAltrincham, United KingdomHQ recorded Sep 28, 202610001+873 contacts →

Exact match

“At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchThame, United KingdomHQ recorded Sep 28, 202610001+777 contacts →

Exact match

“CPM is an international sales outsourcing and customer experience agency.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchGlasgow, United KingdomHQ recorded Sep 28, 20261,001-5,000595 contacts →

Exact match

“Kura is a global CX outsourcer.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-200569 contacts →

Exact match

“Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchWrexham, United KingdomHQ recorded Sep 28, 20261,001-5,000530 contacts →

Exact match

“Moneypenny is the leading customer conversations partner to businesses across the UK and US, blending exceptional people with proprietary AI technology to deliver trusted caller…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchKingston Upon Hull, United KingdomHQ recorded Sep 28, 20261,001-5,000490 contacts →

Exact match

“Give your customers a voice with ResQ.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchSheffield, United KingdomHQ recorded Sep 28, 2026501-1,000327 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchSouthend-on-sea, United KingdomHQ recorded Sep 28, 2026501-1,000318 contacts →

Exact match

“Ventrica is a global leader in delivering emotive CX through BPO.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchBirkenhead, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
14Exact matchHull, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
15Exact matchRichmond, United KingdomHQ recorded Sep 28, 2026501-1,000162 contacts →

Exact match

“We are a leading UK customer experience outsourcer, recently named Gold winners for L&D Team of the Year 2025, Best Contact Centre Culture (Large) 2024 and Outsourced Contact…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 28, 2026201-500140 contacts →

Exact match

“Echoing our clients in every conversation.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchBristol, United KingdomHQ recorded Sep 28, 20261,001-5,000132 contacts →

Exact match

“Dedicated and shared contact centre outsourcing operations.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchBristol, United KingdomHQ recorded Sep 28, 202651-200131 contacts →

Exact match

“Route 101 offers award-winning customer engagement solutions that help you reduce operational costs, enhance efficiency, and deliver a next-generation customer experience (CX).”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchSwansea, United KingdomHQ recorded Sep 28, 2026201-50099 contacts →

Exact match

“Our business is your business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 28, 2026201-50098 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20092 contacts →

Exact match

“We are customer experience experts, working with our clients on bespoke strategies to engage customers along the entire customer journey.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
23Exact matchBury, United KingdomHQ recorded Sep 28, 2026201-50083 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchBristol, United KingdomHQ recorded Sep 28, 202651-20083 contacts →

Exact match

“We are Subfero.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20078 contacts →

Exact match

“Pobuca, the Customer Experience (CX) company.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 425 customer experience outsourcing services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 7,590 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Customer experience outsourcing services based in the United Kingdom at a glance

As of Sep 28, 2026
20.5%Verified-email coverage
87.0Average contacts per company
11-50Median size (employees)
32.0%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
187
11-50
108
51-200
69
201-500
28
501-1,000
12
1,001-5,000
14
10001+
5

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 425 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 “customer experience outsourcing 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 7,590 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 28, 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.

Customer experience outsourcing 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 “customer experience outsourcing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many customer experience outsourcing services are there based in the United Kingdom?

RevenueBase identified 425 company matches for customer experience outsourcing services 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?

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

Which city has the most customer experience outsourcing services?

London leads with 136 company records, followed by Manchester (17) and Bristol (10).

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 7,590 professional contacts with verified work emails tracked across these 425 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 28, 2026.

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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.