Company lists · Data refreshed September 2026

Top 25 Sales outsourcing companies based in the United Kingdom

Name: Sales outsourcing companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 1,002 companies tracked

RevenueBase identified 1,002 sales outsourcing companies headquartered in the United Kingdom as of September 2026 and tracks 9,312 professional contacts across them, including 2,135 with verified work emails and 449 with mobile numbers. London is the largest hub.

This list covers sales 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. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 6, 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 HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review

1,002Companies

9,312Contacts tracked

2,135Verified emails

449Mobile numbers

Explore all 1,002 companies → Free signup · no credit card · 500 free credits

The 25 largest sales outsourcing companies based in the United Kingdom

Ranked by team size

Top 25 of 1,002 sales outsourcing companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names sales outsourcing companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	CPM InternationalStrong evidence	Thame, United KingdomHQ checked Sep 6, 2026	10001+	777
	“CPM is an international sales outsourcing and customer experience agency.” Source: company website · checked Sep 6, 2026
2	MVFIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	201-500	401
	“MVF powers growth for our clients by connecting them to potential customers.” Source: company website · checked Sep 6, 2026
3	EIMSIndirect evidence	Bournemouth, United KingdomHQ checked Sep 6, 2026	501-1,000	369
	“Welcome to EIMS.” Source: company website · checked Sep 6, 2026
4	The Telemarketing CompanyPartial evidence	Brighton, United KingdomHQ checked Sep 6, 2026	201-500	243
	“The Telemarketing Company is one of the UK's most trusted telemarketing agencies, delivering flexible, high-quality voice services, including pre and post sales research…” Source: company website · checked Sep 6, 2026
5	EngagetechPartial evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	205
	“EngageTech is the leading sales development partner for complex B2B technology companies operating in multi-stakeholder, enterprise sales environments.” Source: company website · checked Sep 6, 2026
6	Quantum MarketingIndirect evidence	Reading, United KingdomHQ checked Sep 6, 2026	51-200	198
	“Quantum Marketing hangs its hat on one simple promise: one agency, one brief, and one measure of success.” Source: company website · checked Sep 6, 2026
7	Inside GlobalIndirect evidence	Liverpool, United KingdomHQ checked Sep 6, 2026	51-200	164
	“Inside is a global agency dedicated to delivering growth and revenue opportunities for B2B tech companies.” Source: company website · checked Sep 6, 2026
8	The Point CompanyIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	160
	“We’re The Point Company, the team behind some of the fastest-scaling B2B companies in tech, SaaS and cybersecurity, working across five continents from North America and LATAM to…” Source: company website · checked Sep 6, 2026
9	PUNCHIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	122
	“Most B2B pipeline problems aren't a volume problem.” Source: company website · checked Sep 6, 2026
10	GCLIndirect evidence	Birmingham, United KingdomHQ checked Sep 6, 2026	51-200	119
	“GCL, with its unique, non-scripted approach to telemarketing and related marketing services, has for over 30 years established an enviable reputation for providing winning lead…” Source: company website · checked Sep 6, 2026
11	AIR MarketingPartial evidence	Exeter, United KingdomHQ checked Sep 6, 2026	51-200	116
	“Since 2016, Air Marketing has been the trusted outsourced sales and lead generation agency in the UK for ambitious B2B businesses.” Source: company website · checked Sep 6, 2026
12	DurhamlanePartial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 6, 2026	51-200	115
	“More than SDR Outsourcing.” Source: company website · checked Sep 6, 2026
13	EC Outsourcing Powered By Ison XperiencesPartial evidence	Doxford International Business Park, United KingdomHQ checked Sep 6, 2026	1,001-5,000	114
	“EC Outsourcing is one of the UK's leading outsourced contact centres.” Source: company website · checked Sep 6, 2026
14	FLOWDPartial evidence	Manchester, United KingdomHQ checked Sep 6, 2026	11-50	104
	“Flowd is an award-winning sales prospecting specialist based in the UK, Europe & US.” Source: company website · checked Sep 6, 2026
15	Alliance Sales Support Services LimitedPartial evidence	Tunbridge Wells, United KingdomHQ checked Sep 6, 2026	51-200	82
	“Alliance Sales Support Services provides effective and sustainable sales solutions for your business.” Source: company website · checked Sep 6, 2026
16	Voice Marketing LTDIndirect evidence	Sheffield, United KingdomHQ checked Sep 6, 2026	201-500	75
	“Voice is an agency that specialises in customer acquisition, development and retention programs.” Source: company website · checked Sep 6, 2026
17	Excelerate360Strong evidence	Hitchin, United KingdomHQ checked Sep 6, 2026	51-200	65
	“Excelerate360 offers business development and sales outsourcing services for B2B software and technology companies in the UK, Europe, and North America.” Source: company website · checked Sep 6, 2026
18	Everett SKYIndirect evidence	Essex, United KingdomHQ checked Sep 6, 2026	51-200	61
	“Based in Europe, Everett Sky specializes in helping businesses scale their teams for growth through transformative solutions and exceptional customer service.” Source: company website · checked Sep 6, 2026
19	Angsana NEW Business AgencyIndirect evidence	Covent Garden, United KingdomHQ checked Sep 6, 2026	11-50	61
	“Angsana is the UK’s most respected new business development and lead generation agency for Healthcare & Life Sciences, Marketing Services and Technology companies.” Source: company website · checked Sep 6, 2026
20	SalesarIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	59
	“Looking to fill your calendar with qualified calls?” Source: company website · checked Sep 6, 2026
21	Sales Force EuropeStrong evidence	Hitchin, United KingdomHQ checked Sep 6, 2026	51-200	54
	“European Sales Outsourcing, B2B Lead Generation, European Business Development.” Source: company website · checked Sep 6, 2026
22	FLY PIE LTDStrong evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	48
	“At Fly Pie, sales outsourcing isn’t a “done-for-you” service, it’s a growth engine we build with you.” Source: company website · checked Sep 6, 2026
23	4marketingIndirect evidence	Portsmouth, United KingdomHQ checked Sep 6, 2026	11-50	47
	“4Marketing is a direct marketing agency devoted to generating new business opportunities for its clients through its focused new generation of telemarketing professionals.” Source: company website · checked Sep 6, 2026
24	Advance ConnectsIndirect evidence	Ellesmere Port, United KingdomHQ checked Sep 6, 2026	51-200	45
	“Advance Connects are a B2B telemarketing, lead generation & appointment scheduling experts, operating within various sectors including construction, built environment, industrial…” Source: company website · checked Sep 6, 2026
25	Broadley SpeakingPartial evidence	Tavistock, United KingdomHQ checked Sep 6, 2026	11-50	44
	“With over three decades of experience, we partner with B2B sales and marketing teams to drive and nurture new customer acquisition - securing conversations with the right…” Source: company website · checked Sep 6, 2026

Showing 25 of 1,002 sales outsourcing companies based in the United Kingdom

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Sales outsourcing companies based in the United Kingdom at a glance

As of Sep 6, 2026

1-10Median size (employees)

LondonLargest hub · 329 HQs

449Contacts with mobile numbers

Sep 6, 2026Data refreshed

Companies by employee count

1-10

646

11-50

270

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

1,986

31–60

115

61–90

90–180

180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among sales outsourcing companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

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: Companies headquartered in the United Kingdom whose own description of what they do matches “sales outsourcing companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among sales outsourcing companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 2,135 across the full list. 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 6, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Sales outsourcing companies by metro

Frequently asked

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

RevenueBase identified 1,002 sales outsourcing companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

CPM International, headquartered in Thame, tops this list with the largest team on record.

Which city has the most sales outsourcing companies?

London leads with 329 headquartered companies, followed by Manchester (47) 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 2,135 verified decision-maker contacts tracked across these 1,002 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 6, 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.