Company lists · Data refreshed September 2026

Top 25 Global business process outsourcing firms based in the United Kingdom

Name: Global business process outsourcing firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 616 companies tracked

RevenueBase identified 616 global business process outsourcing firms headquartered in the United Kingdom as of September 2026 and tracks 37,218 professional contacts across them, including 8,142 with verified work emails. London is the largest hub.

This list covers global business process outsourcing firms 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 28, 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 28, 2026 86% judged on-target in blind review

616Companies

37,218Contacts tracked

8,142Verified emails

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The 25 largest global business process outsourcing firms based in the United Kingdom

Ranked by team size

Top 25 of 616 global business process outsourcing firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to global business process outsourcing firms: 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	Capita	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	10001+	20,824 contacts →
	Partial evidence “Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Source: RevenueBase Database · checked Sep 28, 2026
2	QX Global Group	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	3,115 contacts →
	Strong evidence “QX Global Group is a sector‑led, technology‑enabled Business Process Management partner serving mid‑market organizations across the US, UK, and Ireland.” Source: RevenueBase Database · checked Sep 28, 2026
3	Genisys Group	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,178 contacts →
	Strong evidence “Genisys Group is a new age global information technology and business process services company.” Source: RevenueBase Database · checked Sep 28, 2026
4	NSC Global	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,039 contacts →
	Partial evidence “Global business doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 28, 2026
5	The DDC Group	Partial evidence	Worksop, United KingdomHQ checked Sep 28, 2026	5,001-10,000	903 contacts →
	Partial evidence “The DDC Group is a Tech-led Business Process Management (BPM) company serving clients in the shipping and logistics, energy and utilities, banking and finance, retail and…” Source: RevenueBase Database · checked Sep 28, 2026
6	Convergys Intelligent Contact	Indirect evidence	Altrincham, United KingdomHQ checked Sep 28, 2026	10001+	873 contacts →
	Indirect evidence “At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Source: RevenueBase Database · checked Sep 28, 2026
7	Vertex Data Science	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	569 contacts →
	Partial evidence “Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Source: RevenueBase Database · checked Sep 28, 2026
8	Sensée	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	406 contacts →
	Indirect evidence “In 2004, Sensée was founded on a simple principle: bring work to people, not people to work.” Source: RevenueBase Database · checked Sep 28, 2026
9	Ubique Systems	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	333 contacts →
	Partial evidence “Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Source: RevenueBase Database · checked Sep 28, 2026
10	Damco Solutions Limited	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	327 contacts →
	Strong evidence “Damco Solutions Limited is a specialist software solutions and services & a business process outsourcing services company.” Source: RevenueBase Database · checked Sep 28, 2026
11	Momenta	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	313 contacts →
	Indirect evidence “With over 30 years of experience servicing blue-chip clients, Momenta Group is renowned for our expertise and quality-driven approach.” Source: RevenueBase Database · checked Sep 28, 2026
12	Potentiam LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	150 contacts →
	Indirect evidence “At Potentiam, we help businesses unlock growth by building nearshore and offshore teams that empower organisations to scale faster, operate smarter and stay ahead of the…” Source: RevenueBase Database · checked Sep 28, 2026
13	Solvex Solutions	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	103 contacts →
	Strong evidence “we redefine business process outsourcing, empowering companies to broaden their horizons.” Source: RevenueBase Database · checked Sep 28, 2026
14	Rsvp Media Response LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	98 contacts →
	Indirect evidence “Founded in 1988, RSVP is the oldest provider of contact centre services in the UK.” Source: RevenueBase Database · checked Sep 28, 2026
15	Youpro Contact	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	90 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
16	Oneapps Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	86 contacts →
	Partial evidence “OneAPPS Consulting is a global services partner providing IT solutions and building high-performance teams for our clients in the BFSI, Communications, Government and Technology…” Source: RevenueBase Database · checked Sep 28, 2026
17	Proservartner	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	84 contacts →
	Indirect evidence “Proservartner is an international consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
18	FM Outsource	Indirect evidence	Bury, United KingdomHQ checked Sep 28, 2026	201-500	83 contacts →
	Indirect evidence “We are FM Outsource, a modern customer service outsourcer.” Source: RevenueBase Database · checked Sep 28, 2026
19	Invedus Outsourcing	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	70 contacts →
	Partial evidence “Invedus Outsourcing is a remote employees outsourcing company.” Source: RevenueBase Database · checked Sep 28, 2026
20	Xanadutec	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	70 contacts →
	Strong evidence “We are a 400 member strong, specialist business process outsourcing (BPO) provider that caters to the diverse and complex information processing needs of todays corporation.” Source: RevenueBase Database · checked Sep 28, 2026
21	Qormotho	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	66 contacts →
	Strong evidence “QORMOTHO is a global outsourcing company.” Source: RevenueBase Database · checked Sep 28, 2026
22	Iykons	Indirect evidence	Surbiton, United KingdomHQ checked Sep 28, 2026	11-50	63 contacts →
	Indirect evidence “IYKONS – 17 Years of Empowering Businesses Since 2008, IYKONS has been transforming the way businesses operate, delivering trusted solutions that integrate Accounting & Finance…” Source: RevenueBase Database · checked Sep 28, 2026
23	Greybeard Automation & Outsourcing	Strong evidence	Brighouse, United KingdomHQ checked Sep 28, 2026	11-50	62 contacts →
	Strong evidence “Greybeard Solutions provides expert accounting outsourcing and business process automation services to SMEs worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
24	Support Adventure	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	62 contacts →
	Partial evidence “Support Adventure is an outsourcing company that specializes in customer service and support.” Source: RevenueBase Database · checked Sep 28, 2026
25	Everett SKY	Indirect evidence	Essex, United KingdomHQ checked Sep 28, 2026	51-200	61 contacts →
	Indirect evidence “Based in Europe, Everett Sky specializes in helping businesses scale their teams for growth through transformative solutions and exceptional customer service.” Source: RevenueBase Database · checked Sep 28, 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: global business process outsourcing firms. 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 global business process outsourcing firms.
Partial evidence: Its own public description names part of global business process outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name global business process outsourcing firms. 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 616 global business process outsourcing firms based in the United Kingdom

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Global business process outsourcing firms based in the United Kingdom at a glance

As of Sep 28, 2026

21.9%Verified-email coverage

60.4Average contacts per company

11-50Median size (employees)

44.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

233

11-50

214

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 616 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 global business process outsourcing firms, 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 “global business process outsourcing firms”. 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 global business process outsourcing firms), 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 global business process outsourcing firms, 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, 8,142 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 28, 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.

Global business process outsourcing firms by metro

Global business process outsourcing firms in London273

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 global business process outsourcing firms, 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 global business process outsourcing firms are there based in the United Kingdom?

RevenueBase identified 616 global business process outsourcing firms 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?

Capita, headquartered in London, tops this list with the largest team on record.

Which city has the most global business process outsourcing firms?

London leads with 273 headquartered companies, followed by Manchester (21) and Birmingham (14).

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 8,142 verified decision-maker contacts tracked across these 616 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 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 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.