Company lists · Data refreshed September 2026

Top 25 Contact center as a service providers based in the United Kingdom

RevenueBase identified 234 company matches for contact center as a service providers associated with the United Kingdom as of September 2026 and tracks 9,591 professional contacts across them, including 3,312 with verified work emails and 1,021 with mobile numbers. London is the largest hub.

This list covers company matches for contact center as a service providers 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 1, 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 1, 2026 How this list was built
234Companies
9,591Contacts tracked
3,312Verified emails
1,021Mobile numbers
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The 25 largest contact center as a service providers based in the United Kingdom

Ranked by team size
Top 25 of 234 company matches for contact center as a service providers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 1, 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 matchAylesbury, United Kingdom1,001-5,0002,427 contacts →

Exact match

“8x8, Inc.(NASDAQ: EGHT) believes that CX limits were meant to be shattered.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
2Exact matchSeaham, United Kingdom1,001-5,000493 contacts →

Exact match

“Give your customers a voice with ResQ.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
3Exact matchLondon, United Kingdom1,001-5,000436 contacts →

Exact match

“We've moved!”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
4Exact matchSheffield, United Kingdom501-1,000328 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
5Exact matchWirral, United Kingdom1,001-5,000324 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 1, 2026 · View company records in RevenueBase
6Exact matchSouthend-On-Sea, United Kingdom501-1,000320 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
7Exact matchUk, United Kingdom201-500233 contacts →

Exact match

“Vocalcom enables faster value realization by orchestrating end-to-end customer experiences across all channels, combining human with AI-agents.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
8Exact matchLondon, United Kingdom201-500226 contacts →

Exact match

“Since 2002, CallTower has been at the forefront of transforming global communication, emerging as a leader in enterprise-class cloud communication, collaboration, and CX solutions.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
9Exact matchHemel Hempstead, United Kingdom201-500202 contacts →

Exact match

“At Eckoh, we are dedicated to making the world secure, ensuring that everyone can trust brands and engage without risk.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
10Exact matchLeeds, United Kingdom501-1,000202 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
11Exact matchLondon, United Kingdom51-200189 contacts →

Exact match

“3CLogic transforms customer and employee experiences with its leading Cloud Contact Center and Voice AI capabilities purpose-built to enhance today's leading CRM and Customer…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
12Exact matchRichmond, United Kingdom501-1,000159 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 1, 2026 · View company records in RevenueBase
13Exact matchLondon, United Kingdom51-200154 contacts →

Exact match

“Luware builds intelligent, cloud-native CX solutions that unlock the full potential of Microsoft Teams for enterprise communication.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
14Exact matchNewcastle Upon Tyne, United Kingdom201-500140 contacts →

Exact match

“Echoing our clients in every conversation.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
15Exact matchBristol, United Kingdom51-200135 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 1, 2026 · View company records in RevenueBase
16Exact matchBristol, United Kingdom1,001-5,000131 contacts →

Exact match

“Dedicated and shared contact centre outsourcing operations.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
17Exact matchBirmingham, United Kingdom51-200116 contacts →

Exact match

“Transforming Contact Centers with Real-Time Intelligence Founded in 1993, QPC has spent over three decades at the forefront of contact center innovation.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
18Exact matchChester, United Kingdom51-20098 contacts →

Exact match

“Daktela is all-in-one contact center solution perfectly suited for small and mid-size businesses.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
19Exact matchLondon, United Kingdom201-50095 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 1, 2026 · View company records in RevenueBase
20Exact matchBury, United Kingdom201-50082 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
21Exact matchLondon, United Kingdom51-20071 contacts →

Exact match

“Business Systems is a trusted transformation partner with over 35 years of experience helping CX teams and contact centres become smarter, faster and more compliant.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
22Exact matchCrawley, United Kingdom51-20067 contacts →

Exact match

“We provide real-time CX (Customer Experience) insights that enhance Service Providers value-added portfolio, helping them drive revenue growth in the cloud communications market.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
23Exact matchGuildford, United Kingdom51-20060 contacts →

Exact match

“Nebula is a leading SaaS provider of workplace communications software, delivering powerful, secure, and adaptable solutions and applications for voice, messaging, customer…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
24Exact matchLondon, United Kingdom1,001-5,00059 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
25Exact matchHoddesdon, United Kingdom51-20057 contacts →

Exact match

“Bulb Technologies helps all types of CSPs and enterprises to deliver a superior customer experience, reduce customer support related cost and increase revenues.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase

Showing 25 of 234 contact center as a service providers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 3,312 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Contact center as a service providers based in the United Kingdom at a glance

As of Sep 1, 2026
34.5%Verified-email coverage
10.6%Mobile-number coverage
41.0Average contacts per company
11-50Median size (employees)
24.4%Largest-city concentration · London
Sep 1, 2026Page data refreshed

Companies by employee count

1-10
62
11-50
73
51-200
56
201-500
25
501-1,000
8
1,001-5,000
9
10001+
1

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 “contact center as a service providers” 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 3,312 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 1, 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.

Contact center as a service providers 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 “contact center as a service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many contact center as a service providers are there based in the United Kingdom?

RevenueBase identified 234 company matches for contact center as a service providers 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?

8x8 tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most contact center as a service providers?

London leads with 57 company records, followed by Manchester (16) and Glasgow (7).

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 3,312 professional contacts with verified work emails tracked across these 234 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 1, 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.