Company lists · Data refreshed September 2026

Top 25 Outsourcing companies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,214 companies tracked

RevenueBase identified 1,214 outsourcing companies headquartered in the United Kingdom as of September 2026 and tracks 43,165 professional contacts across them, including 9,743 with verified work emails and 1,765 with mobile numbers. London is the largest hub.

This list covers outsourcing companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

1,214Companies

43,165Contacts tracked

9,743Verified emails

1,765Mobile numbers

Unlock all 1,214 companies Free signup · no credit card · 500 free credits

The 25 largest outsourcing companies based in the United Kingdom

Ranked by team size

Top 25 of 1,214 outsourcing companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names outsourcing companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	CapitaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	10001+	20,824
	“Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Source: company website · checked Sep 5, 2026
2	QX Global GroupIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	3,115
	“QX Global Group is a sector‑led, technology‑enabled Business Process Management partner serving mid‑market organizations across the US, UK, and Ireland.” Source: company website · checked Sep 5, 2026
3	NSC GlobalIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,039
	“Global business doesn’t have to be complicated.” Source: company website · checked Sep 5, 2026
4	Convergys Intelligent ContactIndirect evidence	Altrincham, United KingdomHQ checked Sep 5, 2026	10001+	873
	“At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Source: company website · checked Sep 5, 2026
5	Oliver JamesIndirect evidence	Manchester, United KingdomHQ checked Sep 5, 2026	501-1,000	870
	“At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Source: company website · checked Sep 5, 2026
6	Vertex Data ScienceStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	569
	“Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Source: company website · checked Sep 5, 2026
7	OutbooksStrong evidence	Harrow, United KingdomHQ checked Sep 5, 2026	201-500	477
	“Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: company website · checked Sep 5, 2026
8	SenséeIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	406
	“In 2004, Sensée was founded on a simple principle: bring work to people, not people to work.” Source: company website · checked Sep 5, 2026
9	Hirexa SolutionsIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	377
	“Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.” Source: company website · checked Sep 5, 2026
10	Ubique SystemsStrong evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	333
	“Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Source: company website · checked Sep 5, 2026
11	Damco Solutions LimitedStrong evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	327
	“Damco Solutions Limited is a specialist software solutions and services & a business process outsourcing services company.” Source: company website · checked Sep 5, 2026
12	VentricaIndirect evidence	Southend-on-sea, United KingdomHQ checked Sep 5, 2026	501-1,000	318
	“Ventrica is a global leader in delivering emotive CX through BPO.” Source: company website · checked Sep 5, 2026
13	GI OutsourcingStrong evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	311
	“GI Outsourcing is a UK-based accountants outsourcing firm.” Source: company website · checked Sep 5, 2026
14	Sharp BrainsIndirect evidence	Slough, United KingdomHQ checked Sep 5, 2026	51-200	241
	“At Sharp Brains, we are your premier IT Services & Solutions Provider based in the UK, dedicated to meeting your business's unique needs with tailor-made solutions.” Source: company website · checked Sep 5, 2026
15	Linnk GroupStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	194
	“Linnk Group provides staffing, outsourcing and professional services to our clients.” Source: company website · checked Sep 5, 2026
16	NCUBEIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	180
	“In a globalized world, code is currency, and great developers are the gold standard.” Source: company website · checked Sep 5, 2026
17	Potentiam LTDIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	150
	“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: company website · checked Sep 5, 2026
18	Ceuta Healthcare Part Of Ceuta GroupStrong evidence	Bournemouth, United KingdomHQ checked Sep 5, 2026	51-200	148
	“Ceuta Healthcare is the leading outsourcing partner in OTC Health & Personal Care.” Source: company website · checked Sep 5, 2026
19	The DOT HQIndirect evidence	Milton Keynes, United KingdomHQ checked Sep 5, 2026	51-200	146
	“At The Dot HQ, we empower businesses with a full spectrum of offshore resource solutions, ensuring efficiency, compliance and growth.” Source: company website · checked Sep 5, 2026
20	OrchestraIndirect evidence	Woolwich, United KingdomHQ checked Sep 5, 2026	n/a	129
	“Founded in 2007, we are independent, knowledgeable and reliable.” Source: company website · checked Sep 5, 2026
21	Intelligent OutsourcingStrong evidence	Tunbridge Wells, United KingdomHQ checked Sep 5, 2026	51-200	118
	“Intelligent Outsourcing (iO) is an offshoring company in the Philippines dedicated to supporting UK accounting practices.” Source: company website · checked Sep 5, 2026
22	FOCUSStrong evidence	Manchester, United KingdomHQ checked Sep 5, 2026	201-500	118
	“Focus is a UK-managed outsourcing partner with a large dedicated offshore delivery team, built and proven inside real UK retail operations before we opened it to other brands.” Source: company website · checked Sep 5, 2026
23	RemoteliStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	115
	“At Remoteli, we’re revolutionising staffing, recruitment, and outsourcing.” Source: company website · checked Sep 5, 2026
24	IGLUIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	114
	“Iglu is the global hub for tech talent changing how-and where-businesses do their best work.” Source: company website · checked Sep 5, 2026
25	Solvex SolutionsStrong evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	103
	“we redefine business process outsourcing, empowering companies to broaden their horizons.” Source: company website · checked Sep 5, 2026

Showing 25 of 1,214 outsourcing companies based in the United Kingdom

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Outsourcing companies based in the United Kingdom at a glance

As of Sep 5, 2026

11-50Median size (employees)

LondonLargest hub · 513 HQs

1,765Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

544

11-50

395

51-200

181

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

9,153

31–60

538

61–90

90–180

180+

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 outsourcing companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “outsourcing companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among outsourcing companies, 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 an evidence 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, 9,743 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 5, 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.

Outsourcing companies by metro

Outsourcing companies in London513
Outsourcing companies in Manchester48

Frequently asked

How many outsourcing companies are there based in the United Kingdom?

RevenueBase identified 1,214 outsourcing companies 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 outsourcing companies?

London leads with 513 headquartered companies, followed by Manchester (48) and Birmingham (24).

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 9,743 verified decision-maker contacts tracked across these 1,214 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 5, 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.