Company lists · Data refreshed September 2026

Top 25 Cx agencies based in the United Kingdom

Name: Cx agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 530 companies tracked

RevenueBase identified 530 cx agencies headquartered in the United Kingdom as of September 2026 and tracks 9,046 professional contacts across them, including 1,751 with verified work emails. London is the largest hub.

This list covers cx agencies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

530Companies

9,046Contacts tracked

1,751Verified emails

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The 25 largest cx agencies based in the United Kingdom

Ranked by team size

Top 25 of 530 cx agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cx agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Ascensos	Indirect evidence	Motherwell, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,244 contacts →
	Indirect evidence “Ascensos is now Firstsource.” Source: RevenueBase Database · checked Sep 21, 2026
2	Kura CS LTD	Strong evidence	Glasgow, United KingdomHQ checked Sep 21, 2026	1,001-5,000	595 contacts →
	Strong evidence “Kura is a global CX outsourcer.” Source: RevenueBase Database · checked Sep 21, 2026
3	Vertex Data Science	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	569 contacts →
	Indirect evidence “Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Source: RevenueBase Database · checked Sep 21, 2026
4	Merkle Emea	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	368 contacts →
	Indirect evidence “Merkle, a dentsu company, powers the experience economy.” Source: RevenueBase Database · checked Sep 21, 2026
5	The Contact Company	Indirect evidence	Birkenhead, United KingdomHQ checked Sep 21, 2026	1,001-5,000	312 contacts →
	Indirect evidence “Here at The Contact Company, we add value for clients, working as trusted partners to manage and develop their customer contact processes.” Source: RevenueBase Database · checked Sep 21, 2026
6	EDIT	Indirect evidence	Bath, United KingdomHQ checked Sep 21, 2026	51-200	221 contacts →
	Indirect evidence “Edit are future-focused data and technology experts.” Source: RevenueBase Database · checked Sep 21, 2026
7	Interact Contact Centres	Indirect evidence	Richmond, United KingdomHQ checked Sep 21, 2026	501-1,000	162 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
8	ORG	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	139 contacts →
	Indirect evidence “We believe that change is an opportunity to thrive.” Source: RevenueBase Database · checked Sep 21, 2026
9	KPS UK	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	96 contacts →
	Indirect evidence “We help businesses succeed in an ever-changing digital landscape and keep pace with evolving customer expectations.” Source: RevenueBase Database · checked Sep 21, 2026
10	SOH	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	96 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
11	Circlesquare	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	92 contacts →
	Indirect evidence “We are customer experience experts, working with our clients on bespoke strategies to engage customers along the entire customer journey.” Source: RevenueBase Database · checked Sep 21, 2026
12	Brandwidth	Indirect evidence	West End, United KingdomHQ checked Sep 21, 2026	51-200	89 contacts →
	Indirect evidence “Brandwidth is a digital customer experience agency that has been helping brands to grow through digital transformation for over 20 years.” Source: RevenueBase Database · checked Sep 21, 2026
13	Signal	Indirect evidence	Cheltenham, United KingdomHQ checked Sep 21, 2026	51-200	85 contacts →
	Indirect evidence “Signal, a Broadridge Company, is a UK customer communications specialist trusted by leading enterprises in the banking, insurance and social sectors to accelerate digital…” Source: RevenueBase Database · checked Sep 21, 2026
14	EYC	Indirect evidence	Richmond, United KingdomHQ checked Sep 21, 2026	51-200	84 contacts →
	Indirect evidence “Engage Your Customers; a world leader analytical and customer centric technology company with powerful consulting services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Pobuca	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	78 contacts →
	Strong evidence “Pobuca, the Customer Experience (CX) company.” Source: RevenueBase Database · checked Sep 21, 2026
16	TAP CXM	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	77 contacts →
	Indirect evidence “At Tap CXM, we believe businesses do best when they focus on customer experience.” Source: RevenueBase Database · checked Sep 21, 2026
17	PEN	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	76 contacts →
	Indirect evidence “We’re a specialist, management consultancy, focusing on; Customer Experience, Operational Excellence and Change Delivery, dedicated to helping our clients create real, positive…” Source: RevenueBase Database · checked Sep 21, 2026
18	Change Management Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	74 contacts →
	Indirect evidence “Whether complex transformation is required across your business or you are seeking support with a small project, we are here to help.” Source: RevenueBase Database · checked Sep 21, 2026
19	Excalibur Communications	Indirect evidence	Swindon, United KingdomHQ checked Sep 21, 2026	51-200	72 contacts →
	Indirect evidence “Excalibur provides an end to end business consulting service that offers reliable insight, and expertise in communications and technology.” Source: RevenueBase Database · checked Sep 21, 2026
20	Huumun	Indirect evidence	Bracknell, United KingdomHQ checked Sep 21, 2026	51-200	71 contacts →
	Indirect evidence “Digital strategy & innovation, omnichannel design, and interactive data: next-generation customer experiences with a human touch.” Source: RevenueBase Database · checked Sep 21, 2026
21	NERV	Indirect evidence	Cheltenham, United KingdomHQ checked Sep 21, 2026	11-50	68 contacts →
	Indirect evidence “Nerv is an agency specialising in customer experience and content marketing.” Source: RevenueBase Database · checked Sep 21, 2026
22	Business Systems	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	63 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
23	Strive Group	Indirect evidence	Harrogate, United KingdomHQ checked Sep 21, 2026	51-200	62 contacts →
	Indirect evidence “Strive Group is a connected experience agency that turns touchpoints into talking points for businesses that care about their brand, employees and customers.” Source: RevenueBase Database · checked Sep 21, 2026
24	Signalcx	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	51 contacts →
	Indirect evidence “For nearly 4 decades, we have worked with some of the world’s best brands to design and enable great customer experiences.” Source: RevenueBase Database · checked Sep 21, 2026
25	Insight6	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	50 contacts →
	Strong evidence “insight6 is a customer experience (CX) specialist company with a team covering the whole of the UK and Ireland.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cx agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cx agencies.
Partial evidence: Its own public description names part of cx agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cx agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 530 cx agencies based in the United Kingdom

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Cx agencies based in the United Kingdom at a glance

As of Sep 21, 2026

19.4%Verified-email coverage

17.1Average contacts per company

1-10Median size (employees)

37.9%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

377

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 530 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cx agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “cx agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cx agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among cx agencies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,751 across the full list. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Cx agencies by metro

Cx agencies in London201

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cx agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many cx agencies are there based in the United Kingdom?

RevenueBase identified 530 cx agencies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Ascensos, headquartered in Motherwell, tops this list with the largest team on record.

Which city has the most cx agencies?

London leads with 201 headquartered companies, followed by Manchester (13) and Leeds (10).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,751 verified decision-maker contacts tracked across these 530 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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 Smart Search, 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.