Company lists · Data refreshed September 2026

Top 25 Outsourcing companies based in the United Kingdom

RevenueBase identified 1,214 company matches for outsourcing companies associated with 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 company matches for outsourcing companies 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 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 RevenueBase SmartSearch · Exact Recorded Sep 5, 2026 How this list was built
1,214Companies
43,165Contacts tracked
9,743Verified emails
1,765Mobile numbers
Explore this list → 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 company matches for outsourcing companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 5, 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 matchLondon, United KingdomHQ recorded Sep 5, 202610001+20,824 contacts →

Exact match

“Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 5, 20261,001-5,0003,115 contacts →

Exact match

“QX Global Group is a sector‑led, technology‑enabled Business Process Management partner serving mid‑market organizations across the US, UK, and Ireland.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 5, 20261,001-5,0001,039 contacts →

Exact match

“Global business doesn’t have to be complicated.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
4Exact matchAltrincham, United KingdomHQ recorded Sep 5, 202610001+873 contacts →

Exact match

“At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
5Exact matchManchester, United KingdomHQ recorded Sep 5, 2026501-1,000870 contacts →

Exact match

“At Oliver James, we deliver flexible hiring solutions tailored to your business needs across financial services, professional services, commerce & industry.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200569 contacts →

Exact match

“Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
7Exact matchHarrow, United KingdomHQ recorded Sep 5, 2026201-500477 contacts →

Exact match

“Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 5, 20261,001-5,000406 contacts →

Exact match

“In 2004, Sensée was founded on a simple principle: bring work to people, not people to work.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 5, 2026201-500377 contacts →

Exact match

“Hirexa Solutions is a leading group of companies committed to delivering exceptional services to Fortune 500 clients worldwide.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 5, 2026501-1,000333 contacts →

Exact match

“Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 5, 20261,001-5,000327 contacts →

Exact match

“Damco Solutions Limited is a specialist software solutions and services & a business process outsourcing services company.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
12Exact matchSouthend-on-sea, United KingdomHQ recorded Sep 5, 2026501-1,000318 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 5, 2026201-500311 contacts →

Exact match

“GI Outsourcing is a UK-based accountants outsourcing firm.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
14Exact matchSlough, United KingdomHQ recorded Sep 5, 202651-200241 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200194 contacts →

Exact match

“Linnk Group provides staffing, outsourcing and professional services to our clients.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 5, 2026201-500180 contacts →

Exact match

“In a globalized world, code is currency, and great developers are the gold standard.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 5, 2026201-500150 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
18Exact matchBournemouth, United KingdomHQ recorded Sep 5, 202651-200148 contacts →

Exact match

“Ceuta Healthcare is the leading outsourcing partner in OTC Health & Personal Care.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
19Exact matchMilton Keynes, United KingdomHQ recorded Sep 5, 202651-200146 contacts →

Exact match

“At The Dot HQ, we empower businesses with a full spectrum of offshore resource solutions, ensuring efficiency, compliance and growth.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
20Exact matchWoolwich, United KingdomHQ recorded Sep 5, 2026n/a129 contacts →

Exact match

“Founded in 2007, we are independent, knowledgeable and reliable.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
21Exact matchTunbridge Wells, United KingdomHQ recorded Sep 5, 202651-200118 contacts →

Exact match

“Intelligent Outsourcing (iO) is an offshoring company in the Philippines dedicated to supporting UK accounting practices.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
22Exact matchManchester, United KingdomHQ recorded Sep 5, 2026201-500118 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200115 contacts →

Exact match

“At Remoteli, we’re revolutionising staffing, recruitment, and outsourcing.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 5, 2026201-500114 contacts →

Exact match

“Iglu is the global hub for tech talent changing how-and where-businesses do their best work.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 5, 2026201-500103 contacts →

Exact match

“we redefine business process outsourcing, empowering companies to broaden their horizons.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase

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

See the full list, filter by size, metro and specialty, and access 9,743 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

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
50
501-1,000
19
1,001-5,000
11
5,001-10,000
2
10001+
5

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 “outsourcing companies” 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 9,743 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 5, 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.

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 “outsourcing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,214 company matches for outsourcing companies 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?

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

Which city has the most outsourcing companies?

London leads with 513 company records, 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 limited free results with 500 credits to start. Upgrading provides access to the 9,743 professional contacts with verified work emails tracked across these 1,214 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,214 outsourcing companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

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.