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, its RevenueBase Smart Search rating, 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 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 5, 2026 86% judged on-target in blind review

1,214Companies

43,165Contacts tracked

9,743Verified emails

1,765Mobile numbers

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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. RevenueBase Smart Search rates how each company's information relates to outsourcing companies: 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	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	10001+	20,824 contacts →
	Indirect 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 5, 2026
2	QX Global Group	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	3,115 contacts →
	Indirect 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 5, 2026
3	NSC Global	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,039 contacts →
	Indirect evidence “Global business doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 5, 2026
4	Convergys Intelligent Contact	Indirect evidence	Altrincham, United KingdomHQ checked Sep 5, 2026	10001+	873 contacts →
	Indirect evidence “At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Source: RevenueBase Database · checked Sep 5, 2026
5	Oliver James	Indirect evidence	Manchester, United KingdomHQ checked Sep 5, 2026	501-1,000	870 contacts →
	Indirect evidence “At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.” Source: RevenueBase Database · checked Sep 5, 2026
6	Vertex Data Science	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	569 contacts →
	Strong evidence “Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Source: RevenueBase Database · checked Sep 5, 2026
7	Outbooks	Strong evidence	Harrow, United KingdomHQ checked Sep 5, 2026	201-500	477 contacts →
	Strong evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Sep 5, 2026
8	Sensée	Indirect evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
9	Hirexa Solutions	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	377 contacts →
	Indirect evidence “Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.” Source: RevenueBase Database · checked Sep 5, 2026
10	Ubique Systems	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	333 contacts →
	Strong 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 5, 2026
11	Damco Solutions Limited	Strong evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
12	Ventrica	Indirect evidence	Southend-on-sea, United KingdomHQ checked Sep 5, 2026	501-1,000	318 contacts →
	Indirect evidence “Ventrica is a global leader in delivering emotive CX through BPO.” Source: RevenueBase Database · checked Sep 5, 2026
13	GI Outsourcing	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	311 contacts →
	Strong evidence “GI Outsourcing is a UK-based accountants outsourcing firm.” Source: RevenueBase Database · checked Sep 5, 2026
14	Sharp Brains	Indirect evidence	Slough, United KingdomHQ checked Sep 5, 2026	51-200	241 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
15	Linnk Group	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	194 contacts →
	Strong evidence “Linnk Group provides staffing, outsourcing and professional services to our clients.” Source: RevenueBase Database · checked Sep 5, 2026
16	NCUBE	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	180 contacts →
	Indirect evidence “In a globalized world, code is currency, and great developers are the gold standard.” Source: RevenueBase Database · checked Sep 5, 2026
17	Potentiam LTD	Indirect evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
18	Ceuta Healthcare Part Of Ceuta Group	Strong evidence	Bournemouth, United KingdomHQ checked Sep 5, 2026	51-200	148 contacts →
	Strong evidence “Ceuta Healthcare is the leading outsourcing partner in OTC Health & Personal Care.” Source: RevenueBase Database · checked Sep 5, 2026
19	The DOT HQ	Indirect evidence	Milton Keynes, United KingdomHQ checked Sep 5, 2026	51-200	146 contacts →
	Indirect evidence “At The Dot HQ, we empower businesses with a full spectrum of offshore resource solutions, ensuring efficiency, compliance and growth.” Source: RevenueBase Database · checked Sep 5, 2026
20	Orchestra	Indirect evidence	Woolwich, United KingdomHQ checked Sep 5, 2026	n/a	129 contacts →
	Indirect evidence “Founded in 2007, we are independent, knowledgeable and reliable.” Source: RevenueBase Database · checked Sep 5, 2026
21	Intelligent Outsourcing	Strong evidence	Tunbridge Wells, United KingdomHQ checked Sep 5, 2026	51-200	118 contacts →
	Strong evidence “Intelligent Outsourcing (iO) is an offshoring company in the Philippines dedicated to supporting UK accounting practices.” Source: RevenueBase Database · checked Sep 5, 2026
22	FOCUS	Strong evidence	Manchester, United KingdomHQ checked Sep 5, 2026	201-500	118 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 5, 2026
23	Remoteli	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	115 contacts →
	Strong evidence “At Remoteli, we’re revolutionising staffing, recruitment, and outsourcing.” Source: RevenueBase Database · checked Sep 5, 2026
24	IGLU	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	114 contacts →
	Indirect evidence “Iglu is the global hub for tech talent changing how-and where-businesses do their best work.” Source: RevenueBase Database · checked Sep 5, 2026
25	Solvex Solutions	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	103 contacts →
	Strong evidence “we redefine business process outsourcing, empowering companies to broaden their horizons.” Source: RevenueBase Database · checked Sep 5, 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: outsourcing companies. 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 outsourcing companies.
Partial evidence: Its own public description names part of outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsourcing companies. 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 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

22.6%Verified-email coverage

4.1%Mobile-number coverage

35.6Average contacts per company

11-50Median size (employees)

42.3%Largest-city concentration · London

Sep 5, 2026Page data 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+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

9,1530–30

53831–60

061–90

090–180

52180+

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 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 “outsourcing companies”. 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 outsourcing companies), 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 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 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, 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

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 outsourcing companies, 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 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 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.