Company lists · Data verified August 2026

Top 25 Business process outsourcing firms based in the United Kingdom

Name: 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 Verified Aug 28, 2026 453 companies tracked

There are 453 business process outsourcing firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 50,595 professional contacts across them, including 8,658 with verified work emails and 2,316 with mobile numbers. London is the largest hub.

This list covers 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. Data current as of August 28, 2026.

453Companies

50,595Contacts tracked

8,658Verified emails

2,316Mobile numbers

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

Ranked by team size

Top 25 of 453 business process outsourcing firms based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Capita	London	10001+	20,872	4,256
2	Firstsource	Warrington	10001+	17,273	2,483
3	Datamatics Business Solutions	Linford Wood	1,001-5,000	3,001	430
4	Convergys Intelligent Contact	Manchester	10001+	876	37
5	Accace	London	501-1,000	479	338
6	Outbooks	London	201-500	475	39
7	Sensée	London	1,001-5,000	399	186
8	Damco Solutions Limited	London	1,001-5,000	326	5
9	GI Outsourcing	London	201-500	317	168
10	Response	n/a	1,001-5,000	241	67
11	Obox Solution LTD	London	201-500	132	12
12	Exquisite Solution Limited	London	501-1,000	104	4
13	SOLVD	Glasgow	51-200	74	36
14	Tellida Private Limited	n/a	51-200	73	17
15	Qormotho	London	51-200	63	6
16	Direct Response	London	51-200	46	6
17	Orion Call Centre	n/a	51-200	41	3
18	Headway BPO Solutions Headway BPO Of America	Gloucester	201-500	40	1
19	Sensible Group International	Manchester	201-500	36	3
20	Taskaler	Uk	51-200	35	3
21	Kindcare Services UK LTD	Eastbourne	51-200	31	5
22	SNT Group	Leeds	51-200	26	1
23	Servicesnow Group	Manchester	201-500	25	7
24	AGO Outsourcing	East Kilbride	51-200	19	1
25	Dealist Solutions	London	51-200	16	1

Showing 25 of 453 business process outsourcing firms based in the United Kingdom

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Business process outsourcing firms based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 170 HQs

2,316Contacts with mobile numbers

47Emails re-verified in last 30 days

Companies by employee count

1-10

179

11-50

152

51-200

201-500

501-1,000

1,001-5,000

10001+

Business process outsourcing firms by metro

Metro	Companies
Business process outsourcing firms in London	170
Business process outsourcing firms in Manchester	24
Business process outsourcing firms in Birmingham	9
Business process outsourcing firms in Leeds	8
Business process outsourcing firms in Leicester	5
Business process outsourcing firms in Glasgow	5
Business process outsourcing firms in Milton Keynes	5

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “business process outsourcing firms”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 47 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many business process outsourcing firms are there based in the United Kingdom?

There are 453 business process outsourcing firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

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 business process outsourcing firms?

London leads with 170 headquartered companies, followed by Manchester (24) and Birmingham (9).

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 8,658 verified decision-maker contacts tracked across these 453 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.