Company lists · Data verified August 2026

Top 25 Business development outsourcing companies based in the United Kingdom

Name: Business development outsourcing companies 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 1,339 companies tracked

There are 1,339 business development outsourcing companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 9,078 professional contacts across them, including 1,831 with verified work emails and 391 with mobile numbers. London is the largest hub.

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

1,339Companies

9,078Contacts tracked

1,831Verified emails

391Mobile numbers

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The 25 largest business development outsourcing companies based in the United Kingdom

Ranked by team size

Top 25 of 1,339 business development outsourcing companies 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	Accace	London	501-1,000	479	338
2	Smartsourcing	Bristol	201-500	464	183
3	Qualifa	Brighton	51-200	440	2
4	Planet E-Com Solutions Pecs	Liverpool	51-200	116	2
5	Durhamlane	Newcastle Upon Tyne	51-200	114	74
6	Creative Media	Omagh	51-200	70	27
7	Excelerate360	Hitchin	51-200	65	19
8	LTK Consultants LTD	Park	51-200	63	1
9	FLY PIE LTD	London	51-200	49	8
10	Advance Connects	London	51-200	45	20
11	Parallel Partnerships LTD	Leeds	51-200	43	7
12	Matter	Leeds	51-200	39	19
13	Taskaler	Uk	51-200	35	3
14	Paragon Marketing Projects	Portsmouth	51-200	32	23
15	SLM Connect	Manchester	201-500	27	1
16	Servicesnow Group	Manchester	201-500	25	7
17	Outbound Partners	London	51-200	24	3
18	Adds Corporation	London	51-200	16	1
19	BIG Wolf Marketing	London	51-200	16	1
20	Matlay	London	51-200	15	1
21	Callent Tech LTD	London	51-200	12	2
22	Demand Studio	London	51-200	7	5
23	The Growth Group	Manchester	51-200	5	2
24	Weben Partners	Windsor Berkshire	51-200	3	2
25	Sales Geek Midlands	Uk	51-200	3	1

Showing 25 of 1,339 business development outsourcing companies based in the United Kingdom

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

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 452 HQs

391Contacts with mobile numbers

7Emails re-verified in last 30 days

Companies by employee count

1-10

918

11-50

319

51-200

201-500

501-1,000

1,001-5,000

10001+

Business development outsourcing companies by metro

Metro	Companies
Business development outsourcing companies in London	452
Business development outsourcing companies in Manchester	56
Business development outsourcing companies in Birmingham	25
Business development outsourcing companies in Leeds	19
Business development outsourcing companies in Bristol	13
Business development outsourcing companies in Brighton	11
Business development outsourcing companies in Glasgow	11

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 development outsourcing companies”, 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; 7 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 development outsourcing companies are there based in the United Kingdom?

There are 1,339 business development outsourcing companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Accace, headquartered in London, tops this list with the largest team on record.

Which city has the most business development outsourcing companies?

London leads with 452 headquartered companies, followed by Manchester (56) and Birmingham (25).

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 1,831 verified decision-maker contacts tracked across these 1,339 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.