Company lists · Data verified August 2026

Top 25 Outsourced sdr companies based in the United Kingdom

Name: Outsourced sdr 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 490 companies tracked

There are 490 outsourced sdr companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 3,695 professional contacts across them, including 778 with verified work emails and 173 with mobile numbers. London is the largest hub.

This list covers outsourced sdr 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.

490Companies

3,695Contacts tracked

778Verified emails

173Mobile numbers

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The 25 largest outsourced sdr companies based in the United Kingdom

Ranked by team size

Top 25 of 490 outsourced sdr 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	AIR Marketing	Exeter	51-200	123	47
2	PUNCH	London	51-200	122	24
3	Durhamlane	Newcastle Upon Tyne	51-200	114	74
4	FLOWD	Manchester	11-50	106	20
5	Excelerate360	Hitchin	51-200	65	19
6	FLY PIE LTD	London	51-200	49	8
7	Advance Connects	London	51-200	45	20
8	Beanstalk Marketing	Birmingham	11-50	43	33
9	Parallel Partnerships LTD	Leeds	51-200	43	7
10	Seventic	London	11-50	38	4
11	Paceops	Cambridge	11-50	36	20
12	Paragon Marketing Projects	Portsmouth	51-200	32	23
13	TELU	Leeds	51-200	32	6
14	The Lead Generation Company	Manchester Manchester	11-50	28	10
15	The Lead GEN Specialists	n/a	11-50	25	9
16	Outbound Partners	London	51-200	24	3
17	Incite NEW Business	Kingston Upon Thames	11-50	18	6
18	QSL	London	11-50	18	5
19	ACE Marketing LTD	Birmingham	11-50	17	1
20	Newton FOX	Bolton	11-50	16	10
21	BIG Wolf Marketing	London	51-200	16	1
22	Sales Fuel	Brighouse	11-50	14	7
23	Hayward Miller	Thetford	11-50	12	6
24	Bluewater Marketing LTD	Wellingborough	11-50	12	4
25	Salessourcers	London	11-50	12	4

Showing 25 of 490 outsourced sdr companies based in the United Kingdom

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Outsourced sdr companies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 161 HQs

173Contacts with mobile numbers

7Emails re-verified in last 30 days

Companies by employee count

1-10

326

11-50

133

51-200

201-500

Outsourced sdr companies by metro

Metro	Companies
Outsourced sdr companies in London	161
Outsourced sdr companies in Manchester	24
Outsourced sdr companies in Birmingham	14
Outsourced sdr companies in Leeds	10
Outsourced sdr companies in Oxford	6
Outsourced sdr companies in Southampton	5
Outsourced sdr companies in Peterborough	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 “outsourced sdr 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 outsourced sdr companies are there based in the United Kingdom?

There are 490 outsourced sdr companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

AIR Marketing, headquartered in Exeter, tops this list with the largest team on record.

Which city has the most outsourced sdr companies?

London leads with 161 headquartered companies, followed by Manchester (24) and Birmingham (14).

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 778 verified decision-maker contacts tracked across these 490 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.