Company lists · Data refreshed November 2026

Top 24 Customer engagement services based in the United Kingdom

RevenueBase identified 468 company matches for customer engagement services associated with the United Kingdom as of November 2026 and tracks 16,818 professional contacts across them, including 3,764 with verified work emails. London is the largest hub.

This list covers company matches for customer engagement 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 6, 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 6, 2026 How this list was built
468Companies
16,818Contacts tracked
3,764Verified emails
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The 24 largest customer engagement services based in the United Kingdom

Ranked by team size
Top 24 of 468 company matches for customer engagement services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchBirmingham, United KingdomHQ recorded Nov 6, 20261,001-5,0001,983 contacts →

Exact match

“We are Sigma Connected, we are different.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchMotherwell, United KingdomHQ recorded Nov 6, 20261,001-5,0001,323 contacts →

Exact match

“Ascensos is now Firstsource.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-5001,023 contacts →

Exact match

“TLC Worldwide is a global leader in customer engagement, loyalty, and reward solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchAltrincham, United KingdomHQ recorded Nov 6, 202610001+976 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Nov 6, 2026n/a626 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 · Nov 6, 2026 · View company records in RevenueBase
6Exact matchDatchet, United KingdomHQ recorded Nov 6, 2026501-1,000572 contacts →

Exact match

“Your world is changing at lightning speed; new business models, new technologies, new competitors, and new customers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchWrexham, United KingdomHQ recorded Nov 6, 20261,001-5,000548 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 · Nov 6, 2026 · View company records in RevenueBase
8Exact matchKingston Upon Hull, United KingdomHQ recorded Nov 6, 20261,001-5,000537 contacts →

Exact match

“Give your customers a voice with ResQ.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500428 contacts →

Exact match

“MVF powers growth for our clients by connecting them to potential customers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBirkenhead, United KingdomHQ recorded Nov 6, 20261,001-5,000358 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchSheffield, United KingdomHQ recorded Nov 6, 2026501-1,000347 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSouthend-on-sea, United KingdomHQ recorded Nov 6, 2026501-1,000343 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBath, United KingdomHQ recorded Nov 6, 202651-200252 contacts →

Exact match

“Edit are future-focused data and technology experts.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchHull, United KingdomHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
15Exact matchBristol, United KingdomHQ recorded Nov 6, 202651-200178 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 · Nov 6, 2026 · View company records in RevenueBase
16Exact matchRichmond, United KingdomHQ recorded Nov 6, 2026501-1,000172 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 · Nov 6, 2026 · View company records in RevenueBase
17Exact matchWolverhampton, United KingdomHQ recorded Nov 6, 202651-200151 contacts →

Exact match

“Respondez is one of the UK’s leading customer engagement solution provider.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchWoolwich, United KingdomHQ recorded Nov 6, 2026n/a141 contacts →

Exact match

“Founded in 2007, we are independent, knowledgeable and reliable.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchHuddersfield, United KingdomHQ recorded Nov 6, 202611-50126 contacts →

Exact match

“We’re Ello, the agency who create everlasting connections between brands and consumers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5099 contacts →

Exact match

“We’re service communication experts – using a mix of science, creativity and service know-how to improve how you talk with your customers through all channels and media, from…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchGlamorgan, United KingdomHQ recorded Nov 6, 2026201-50083 contacts →

Exact match

“Our business is your business.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchBury, United KingdomHQ recorded Nov 6, 2026201-50082 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchLower Stretton, United KingdomHQ recorded Nov 6, 202651-20077 contacts →

Exact match

“We are one of the UK’s only combined incentive, loyalty, partnership and CRM agencies – providing the ideas, planning and delivery of campaigns for some of the UK’s biggest…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 24 of 468 customer engagement services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 3,764 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Customer engagement services based in the United Kingdom at a glance

As of Nov 6, 2026
22.4%Verified-email coverage
35.9Average contacts per company
11-50Median size (employees)
34.8%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
218
11-50
118
51-200
74
201-500
29
501-1,000
9
1,001-5,000
11
10001+
1

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 468 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 engagement 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 3,764 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 6, 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 engagement 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 engagement services”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 468 company matches for customer engagement 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?

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

Which city has the most customer engagement services?

London leads with 163 company records, followed by Manchester (15) and Bristol (9).

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 3,764 professional contacts with verified work emails tracked across these 468 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 6, 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.