Company lists · Data refreshed September 2026

Top 25 Outbound sales companies based in the United Kingdom

Name: Outbound sales 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 5, 2026 822 companies tracked

RevenueBase identified 822 outbound sales companies headquartered in the United Kingdom as of September 2026 and tracks 7,646 professional contacts across them, including 1,573 with verified work emails and 413 with mobile numbers. London is the largest hub.

This list covers outbound sales 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

822Companies

7,646Contacts tracked

1,573Verified emails

413Mobile numbers

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The 25 largest outbound sales companies based in the United Kingdom

Ranked by team size

Top 25 of 822 outbound sales companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to outbound sales companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	The Telemarketing Company	Partial evidence	Brighton, United KingdomHQ checked Sep 5, 2026	201-500	243 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 5, 2026
2	Engagetech	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	205 contacts →
	Partial evidence “EngageTech is the leading sales development partner for complex B2B technology companies operating in multi-stakeholder, enterprise sales environments.” Source: RevenueBase Database · checked Sep 5, 2026
3	Inside Global	Indirect evidence	Liverpool, United KingdomHQ checked Sep 5, 2026	51-200	164 contacts →
	Indirect evidence “Inside is a global agency dedicated to delivering growth and revenue opportunities for B2B tech companies.” Source: RevenueBase Database · checked Sep 5, 2026
4	GCL	Indirect evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	51-200	119 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
5	AIR Marketing	Partial evidence	Exeter, United KingdomHQ checked Sep 5, 2026	51-200	116 contacts →
	Partial evidence “Since 2016, Air Marketing has been the trusted outsourced sales and lead generation agency in the UK for ambitious B2B businesses.” Source: RevenueBase Database · checked Sep 5, 2026
6	Durhamlane	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 5, 2026	51-200	115 contacts →
	Indirect evidence “More than SDR Outsourcing.” Source: RevenueBase Database · checked Sep 5, 2026
7	EC Outsourcing Powered By Ison Xperiences	Indirect evidence	Doxford International Business Park, United KingdomHQ checked Sep 5, 2026	1,001-5,000	114 contacts →
	Indirect evidence “EC Outsourcing is one of the UK's leading outsourced contact centres.” Source: RevenueBase Database · checked Sep 5, 2026
8	FLOWD	Partial evidence	Manchester, United KingdomHQ checked Sep 5, 2026	11-50	104 contacts →
	Partial evidence “Flowd is an award-winning sales prospecting specialist based in the UK, Europe & US.” Source: RevenueBase Database · checked Sep 5, 2026
9	Pursuit Marketing	Indirect evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	51-200	96 contacts →
	Indirect evidence “Pursuit Marketing are Experts in Demand Generation, Telemarketing, Digital Marketing and Creative Design - your 360 Marketing Provider.” Source: RevenueBase Database · checked Sep 5, 2026
10	Internal Results	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	88 contacts →
	Indirect evidence “The B2B Customer Acquisition Specialists Internal Results specialize in generating leads, promoting content, and driving brand awareness for B2B organizations worldwide through…” Source: RevenueBase Database · checked Sep 5, 2026
11	Alliance Sales Support Services Limited	Partial evidence	Tunbridge Wells, United KingdomHQ checked Sep 5, 2026	51-200	82 contacts →
	Partial evidence “Alliance Sales Support Services provides effective and sustainable sales solutions for your business.” Source: RevenueBase Database · checked Sep 5, 2026
12	Voice Marketing LTD	Indirect evidence	Sheffield, United KingdomHQ checked Sep 5, 2026	201-500	75 contacts →
	Indirect evidence “Voice is an agency that specialises in customer acquisition, development and retention programs.” Source: RevenueBase Database · checked Sep 5, 2026
13	Creative Media	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	66 contacts →
	Indirect evidence “Creative Media is a global marketing agency specializing in B2B lead generation.” Source: RevenueBase Database · checked Sep 5, 2026
14	Excelerate360	Partial evidence	Hitchin, United KingdomHQ checked Sep 5, 2026	51-200	65 contacts →
	Partial evidence “Excelerate360 offers business development and sales outsourcing services for B2B software and technology companies in the UK, Europe, and North America.” Source: RevenueBase Database · checked Sep 5, 2026
15	Tfli LTD	Indirect evidence	Macclesfield, United KingdomHQ checked Sep 5, 2026	51-200	60 contacts →
	Indirect evidence “TFLI are a leading B2B & B2C customer generation agency, driving growth for some of the world's biggest brands.” Source: RevenueBase Database · checked Sep 5, 2026
16	Salesar	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	59 contacts →
	Indirect evidence “Looking to fill your calendar with qualified calls?” Source: RevenueBase Database · checked Sep 5, 2026
17	Sales Force Europe	Partial evidence	Hitchin, United KingdomHQ checked Sep 5, 2026	51-200	54 contacts →
	Partial evidence “European Sales Outsourcing, B2B Lead Generation, European Business Development.” Source: RevenueBase Database · checked Sep 5, 2026
18	FLY PIE LTD	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	48 contacts →
	Partial evidence “At Fly Pie, sales outsourcing isn’t a “done-for-you” service, it’s a growth engine we build with you.” Source: RevenueBase Database · checked Sep 5, 2026
19	4marketing	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 5, 2026	11-50	47 contacts →
	Indirect evidence “4Marketing is a direct marketing agency devoted to generating new business opportunities for its clients through its focused new generation of telemarketing professionals.” Source: RevenueBase Database · checked Sep 5, 2026
20	Advance Connects	Indirect evidence	Ellesmere Port, United KingdomHQ checked Sep 5, 2026	51-200	45 contacts →
	Indirect evidence “Advance Connects are a B2B telemarketing, lead generation & appointment scheduling experts, operating within various sectors including construction, built environment, industrial…” Source: RevenueBase Database · checked Sep 5, 2026
21	Broadley Speaking	Partial evidence	Tavistock, United KingdomHQ checked Sep 5, 2026	11-50	44 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 5, 2026
22	Beanstalk Marketing	Indirect evidence	Southend On Sea, United KingdomHQ checked Sep 5, 2026	11-50	43 contacts →
	Indirect evidence “Beanstalk is an integrated B2B Telemarketing and Lead Generation agency dedicated to helping our customers win new business.” Source: RevenueBase Database · checked Sep 5, 2026
23	Parallel Partnerships LTD	Indirect evidence	Leeds, United KingdomHQ checked Sep 5, 2026	51-200	43 contacts →
	Indirect evidence “B2B and B2C outsourced Telemarketing agency.” Source: RevenueBase Database · checked Sep 5, 2026
24	Matter	Indirect evidence	Leeds, United KingdomHQ checked Sep 5, 2026	51-200	41 contacts →
	Indirect evidence “The problem with B2B growth isn't a lack of activity.” Source: RevenueBase Database · checked Sep 5, 2026
25	Sentrama	Partial evidence	Bristol, United KingdomHQ checked Sep 5, 2026	11-50	38 contacts →
	Partial evidence “Highly qualified B2B Sales Appointments you can trust.” Source: RevenueBase Database · checked Sep 5, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: outbound sales companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names outbound sales companies.
Partial evidence: Its own public description names part of outbound sales companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outbound sales companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 822 outbound sales companies based in the United Kingdom

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Outbound sales companies based in the United Kingdom at a glance

As of Sep 5, 2026

20.6%Verified-email coverage

5.4%Mobile-number coverage

9.3Average contacts per company

1-10Median size (employees)

32.1%Largest-city concentration · London

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

504

11-50

235

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

1,4720–30

8231–60

061–90

190–180

18180+

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 outbound sales companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “outbound sales companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names outbound sales companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among outbound sales 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 its RevenueBase Smart Search 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, 1,573 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 5, 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.

Outbound sales companies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names outbound sales companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 822 outbound sales 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?

The Telemarketing Company, headquartered in Brighton, tops this list with the largest team on record.

Which city has the most outbound sales companies?

London leads with 264 headquartered companies, followed by Manchester (43) and Birmingham (22).

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 1,573 verified decision-maker contacts tracked across these 822 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 5, 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 Smart Search, 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.