Company lists · Data verified August 2026

Top 25 Cold email agencies based in the United Kingdom

Name: Cold email agencies 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 137 companies tracked

There are 137 cold email agencies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 8,514 professional contacts across them, including 122 with verified work emails and 1,596 with mobile numbers. London is the largest hub.

This list covers cold email agencies 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.

137Companies

8,514Contacts tracked

122Verified emails

1,596Mobile numbers

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The 25 largest cold email agencies based in the United Kingdom

Ranked by team size

Top 25 of 137 cold email agencies 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	Emailclub	London	51-200	103	39
2	Mailercloud	London	11-50	30	12
3	Open House Media	London	11-50	16	8
4	TOP Marketing Media	Preston	1-10	16	1
5	Merrehill	Macclesfield	11-50	13	9
6	Salessourcers	London	11-50	12	4
7	Callent Tech LTD	London	51-200	12	2
8	Oaktree Technology LTD	Stourbridge	1-10	10	3
9	Manifest NEW Business LTD	London	11-50	9	4
10	Perlon AI	London	11-50	7	4
11	Pitchlane	London	1-10	7	1
12	IOL Marketing	Alford	1-10	5	4
13	Guruaxis	London	11-50	5	1
14	Cosmic Revenue	London	1-10	5	1
15	Enchant Agency	London	11-50	4	4
16	Zoommail Email Marketing & Marketing Stack	Plymouth	1-10	3	3
17	Proven Concept	Portsmouth	1-10	3	2
18	Mailpimps	London	1-10	1	1
19	RED Circle Digital	London	1-10	1	1
20	Simplescale	Stirling	1-10	1	1
21	Omnipredict	London	1-10	1	1
22	Inqubee	Thame	1-10	1	1
23	The Email ACE	Leamington Spa	1-10	1	1
24	Killer Cold Email	London	1-10	1	1
25	Efocus Marketing	Orpington	1-10	1	1

Showing 25 of 137 cold email agencies based in the United Kingdom

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Cold email agencies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 69 HQs

1,596Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

111

11-50

51-200

201-500

Cold email agencies by metro

Metro	Companies
Cold email agencies in London	69
Cold email agencies in Manchester	10
Cold email agencies in Leicester	2
Cold email agencies in Poole	2
Cold email agencies in Bristol	2
Cold email agencies in Glasgow	2
Cold email agencies in Brighton	2
Cold email agencies in Coventry	2

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 “cold email agencies”, 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; 0 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 cold email agencies are there based in the United Kingdom?

There are 137 cold email agencies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most cold email agencies?

London leads with 69 headquartered companies, followed by Manchester (10) and Leicester (2).

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 122 verified decision-maker contacts tracked across these 137 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.