Company lists · Data refreshed September 2026

Top 25 Business support outsourcing companies based in the United Kingdom

RevenueBase identified 1,106 company matches for business support outsourcing companies associated with the United Kingdom as of September 2026 and tracks 30,625 professional contacts across them, including 6,267 with verified work emails. London is the largest hub.

This list covers company matches for business support 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 27, 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 27, 2026 How this list was built
1,106Companies
30,625Contacts tracked
6,267Verified emails
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The 25 largest business support outsourcing companies based in the United Kingdom

Ranked by team size
Top 25 of 1,106 company matches for business support outsourcing companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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 27, 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 27, 2026 · View company records in RevenueBase
2Exact matchAltrincham, United KingdomHQ recorded Sep 27, 202610001+873 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
5Exact matchSheffield, United KingdomHQ recorded Sep 27, 2026501-1,000327 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchRichmond, United KingdomHQ recorded Sep 27, 2026501-1,000162 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchManchester, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-200108 contacts →

Exact match

“As attention turns to the new fiscal year, accountants across the UK are finalising plans to boost growth and productivity and improve profitability.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 27, 2026201-500103 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchHemel Hempstead, United KingdomHQ recorded Sep 27, 202611-5094 contacts →

Exact match

“Running your own business can be overwhelming, but with SSG's market-leading support services, you can focus on what really matters – your clients and billing!”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20090 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchBury, United KingdomHQ recorded Sep 27, 2026201-50083 contacts →

Exact match

“We are FM Outsource, a modern customer service outsourcer.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchBristol, United KingdomHQ recorded Sep 27, 202651-20083 contacts →

Exact match

“We are Subfero.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchTunbridge Wells, United KingdomHQ recorded Sep 27, 202651-20082 contacts →

Exact match

“Alliance Sales Support Services provides effective and sustainable sales solutions for your business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchGlasgow, United KingdomHQ recorded Sep 27, 202651-20074 contacts →

Exact match

“Streamline your business with our bespoke support services.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchNantgawr, United KingdomHQ recorded Sep 27, 2026201-50073 contacts →

Exact match

“We’re a 24/7 specialist outsourced Contact Centre business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 27, 2026201-50070 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchHitchin, United KingdomHQ recorded Sep 27, 202651-20065 contacts →

Exact match

“Excelerate360 offers business development and sales outsourcing services for B2B software and technology companies in the UK, Europe, and North America.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchBrighouse, United KingdomHQ recorded Sep 27, 202611-5062 contacts →

Exact match

“Greybeard Solutions provides expert accounting outsourcing and business process automation services to SMEs worldwide.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20062 contacts →

Exact match

“Support Adventure is an outsourcing company that specializes in customer service and support.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,00059 contacts →

Exact match

“CallCare is your outsourced contact centre and customer service partner.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchRomsey, United KingdomHQ recorded Sep 27, 2026201-50054 contacts →

Exact match

“We are an established AI-enabled call centre specialising in every aspect of sales and customer service.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchWrexham, United KingdomHQ recorded Sep 27, 202651-20054 contacts →

Exact match

“Orca offers flexible and adaptable call answering and live chat services that help clients manage costs effectively.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20053 contacts →

Exact match

“Most UK SMEs hit the same two walls.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchBeccles, United KingdomHQ recorded Sep 27, 202611-5047 contacts →

Exact match

“Leading providers of specialist support services.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 1,106 business support outsourcing companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 6,267 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Business support outsourcing companies based in the United Kingdom at a glance

As of Sep 27, 2026
20.5%Verified-email coverage
27.7Average contacts per company
1-10Median size (employees)
27.4%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
728
11-50
245
51-200
77
201-500
31
501-1,000
11
1,001-5,000
7
10001+
3

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 1,106 companies.

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 “business support 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 6,267 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 27, 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 “business support outsourcing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,106 company matches for business support 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 business support outsourcing companies?

London leads with 303 company records, followed by Manchester (35) and Birmingham (23).

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 6,267 professional contacts with verified work emails tracked across these 1,106 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 27, 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.