Company lists · Data refreshed September 2026

Top 25 Outbound sales agencies based in the United Kingdom

Name: Outbound sales agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 1,001 companies tracked

RevenueBase identified 1,001 outbound sales agencies headquartered in the United Kingdom as of September 2026 and tracks 8,406 professional contacts across them, including 1,558 with verified work emails and 453 with mobile numbers. London is the largest hub.

This list covers outbound sales 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 3, 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 3, 2026 86% judged on-target in blind review

1,001Companies

8,406Contacts tracked

1,558Verified emails

453Mobile numbers

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The 25 largest outbound sales agencies based in the United Kingdom

Ranked by team size

Top 25 of 1,001 outbound sales agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to outbound sales agencies: 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	MVF	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	201-500	417 contacts →
	Indirect evidence “MVF powers growth for our clients by connecting them to potential customers.” Source: RevenueBase Database · checked Sep 3, 2026
2	The Telemarketing Company	Partial evidence	Brighton, United KingdomHQ checked Sep 3, 2026	201-500	242 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 3, 2026
3	AIR Marketing	Partial evidence	Exeter, United KingdomHQ checked Sep 3, 2026	51-200	123 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 3, 2026
4	GCL	Indirect evidence	Birmingham, United KingdomHQ checked Sep 3, 2026	51-200	120 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 3, 2026
5	EC Outsourcing Powered By Ison Xperiences	Indirect evidence	Doxford International Business Park, United KingdomHQ checked Sep 3, 2026	1,001-5,000	115 contacts →
	Indirect evidence “EC Outsourcing is one of the UK's leading outsourced contact centres.” Source: RevenueBase Database · checked Sep 3, 2026
6	Durhamlane	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 3, 2026	51-200	114 contacts →
	Indirect evidence “More than SDR Outsourcing.” Source: RevenueBase Database · checked Sep 3, 2026
7	Pursuit Marketing	Indirect evidence	Glasgow, United KingdomHQ checked Sep 3, 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 3, 2026
8	Voice Marketing LTD	Indirect evidence	Sheffield, United KingdomHQ checked Sep 3, 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 3, 2026
9	Excelerate360	Partial evidence	Hitchin, United KingdomHQ checked Sep 3, 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 3, 2026
10	Impact Call Centre	Indirect evidence	Romsey, United KingdomHQ checked Sep 3, 2026	201-500	55 contacts →
	Indirect evidence “Employing over 250 staff, we are a well-established, highly regarded and successful outsourced multi-channel contact centre.” Source: RevenueBase Database · checked Sep 3, 2026
11	FLY PIE LTD	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	49 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 3, 2026
12	Advance Connects	Indirect evidence	Ellesmere Port, United KingdomHQ checked Sep 3, 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 3, 2026
13	Parallel Partnerships LTD	Indirect evidence	Leeds, United KingdomHQ checked Sep 3, 2026	51-200	43 contacts →
	Indirect evidence “B2B and B2C outsourced Telemarketing agency.” Source: RevenueBase Database · checked Sep 3, 2026
14	Matter	Indirect evidence	Leeds, United KingdomHQ checked Sep 3, 2026	51-200	39 contacts →
	Indirect evidence “The problem with B2B growth isn't a lack of activity.” Source: RevenueBase Database · checked Sep 3, 2026
15	Stack Solutions Group	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	201-500	39 contacts →
	Indirect evidence “At Stack Solutions Group, we help ambitious brands grow faster, smarter, and more efficiently - across any market.” Source: RevenueBase Database · checked Sep 3, 2026
16	1 Stop Data LTD	Indirect evidence	Ewell, United KingdomHQ checked Sep 3, 2026	51-200	35 contacts →
	Indirect evidence “1 Stop Data offers the best of breed Marketing, Lead Generation and Call Centre services.” Source: RevenueBase Database · checked Sep 3, 2026
17	Paragon Marketing Projects	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 3, 2026	51-200	32 contacts →
	Indirect evidence “Working with clients across a variety of sectors, Paragon is a leading provider of B2B lead generation and appointment setting marketing projects with vast experience in creating…” Source: RevenueBase Database · checked Sep 3, 2026
18	TELU	Indirect evidence	Leeds, United KingdomHQ checked Sep 3, 2026	51-200	32 contacts →
	Indirect evidence “Telu is the complete business solution for generating leads and revenue for your business.” Source: RevenueBase Database · checked Sep 3, 2026
19	SLM Connect	Indirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	201-500	27 contacts →
	Indirect evidence “Since SLM Connect started up as a contact centre in 2008, we've supplied more than customers to our clients.” Source: RevenueBase Database · checked Sep 3, 2026
20	1call Direct	Indirect evidence	Glasgow, United KingdomHQ checked Sep 3, 2026	51-200	26 contacts →
	Indirect evidence “Established in 1988 in London as Hotlines Telemarketing Ltd, the Glasgow branch (which was established in June rebranded as 1Call Direct in October 2003.” Source: RevenueBase Database · checked Sep 3, 2026
21	AGO Outsourcing	Strong evidence	East Kilbride, United KingdomHQ checked Sep 3, 2026	51-200	19 contacts →
	Strong evidence “AGO Outsourcing is a leading provider of outsourced business services, including inbound and outbound customer service and outbound sales as well as social media engagement…” Source: RevenueBase Database · checked Sep 3, 2026
22	BIG Wolf Marketing	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	16 contacts →
	Indirect evidence “Big Wolf Marketing - Leaders in B2B Telemarketing, Lead Generation & Appointment Setting With a vast combined experience, implementing established and cutting edge innovative…” Source: RevenueBase Database · checked Sep 3, 2026
23	Adds Corporation	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	16 contacts →
	Indirect evidence “ADDS Corporation is a one-stop marketplace for the best B2B Marketers, Agencies, Publishers, and Lead Generation Solution Providers.” Source: RevenueBase Database · checked Sep 3, 2026
24	Callent Tech LTD	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	12 contacts →
	Indirect evidence “Welcome to Callent Tech, The Future of B2B Demand Generation.” Source: RevenueBase Database · checked Sep 3, 2026
25	The Chat Shop	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	11 contacts →
	Partial evidence “We increase sales leads by 50% and achieve 99% customer satisfaction with our UK- and US-based team.” Source: RevenueBase Database · checked Sep 3, 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 agencies. 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 agencies.
Partial evidence: Its own public description names part of outbound sales agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outbound sales agencies. 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 1,001 outbound sales agencies based in the United Kingdom

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Outbound sales agencies based in the United Kingdom at a glance

As of Sep 3, 2026

18.5%Verified-email coverage

5.4%Mobile-number coverage

8.4Average contacts per company

1-10Median size (employees)

32.6%Largest-city concentration · London

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

632

11-50

267

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

00–30

13931–60

84761–90

55890–180

14180+

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 agencies, 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 agencies”. 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 agencies), 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 agencies, 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, 1,558 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 3, 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 agencies 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 agencies, 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 agencies are there based in the United Kingdom?

RevenueBase identified 1,001 outbound sales agencies 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?

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

Which city has the most outbound sales agencies?

London leads with 326 headquartered companies, followed by Manchester (56) and Birmingham (27).

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 1,558 verified decision-maker contacts tracked across these 1,001 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 3, 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.