Company lists · Data refreshed September 2026

Top 25 Outbound sales agencies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 335 companies tracked

RevenueBase identified 335 outbound sales agencies headquartered in London, United Kingdom as of September 2026 and tracks 2,889 professional contacts across them, including 549 with verified work emails and 117 with mobile numbers. London is the largest hub.

This list covers outbound sales agencies headquartered in London, 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 13, 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 13, 2026 86% judged on-target in blind review

335Companies

2,889Contacts tracked

549Verified emails

117Mobile numbers

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The 25 largest outbound sales agencies based in London, United Kingdom

Ranked by team size

Top 25 of 335 outbound sales agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 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 13, 2026	201-500	401 contacts →
	Indirect evidence “MVF powers growth for our clients by connecting them to potential customers.” Source: RevenueBase Database · checked Sep 13, 2026
2	Engagetech	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
3	Youpro Contact	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	90 contacts →
	Indirect evidence “A world class offshore outsourcing agency, with offices in London and Harare, we have access to some of the best educated, best spoken graduates you will find anywhere in the…” Source: RevenueBase Database · checked Sep 13, 2026
4	Salesar	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	59 contacts →
	Indirect evidence “Looking to fill your calendar with qualified calls?” Source: RevenueBase Database · checked Sep 13, 2026
5	FLY PIE LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
6	Pipeline Professional Services	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	43 contacts →
	Partial evidence “Pipeline is a collective of sales professionals, united in our passion and drive for commercial success.” Source: RevenueBase Database · checked Sep 13, 2026
7	Stack Solutions Group	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
8	Double Impact Group	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	31 contacts →
	Indirect evidence “Mission 1.” Source: RevenueBase Database · checked Sep 13, 2026
9	Recruitment Revenue	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	26 contacts →
	Indirect evidence “Recruitment Revenue is a lead generation partner built exclusively for recruitment agencies.” Source: RevenueBase Database · checked Sep 13, 2026
10	Xcellerate Labs	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	26 contacts →
	Indirect evidence “At Xcellerate Labs, we boost your pipeline and accelerate results in the tech industry.” Source: RevenueBase Database · checked Sep 13, 2026
11	Outbound Partners	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	24 contacts →
	Partial evidence “Outbound Partners helps B2B companies generate pipeline through structured outbound.” Source: RevenueBase Database · checked Sep 13, 2026
12	Prospectaware	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	23 contacts →
	Indirect evidence “ProspectAware are experts at Executive level appointment setting.” Source: RevenueBase Database · checked Sep 13, 2026
13	Appointment Setter	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	18 contacts →
	Indirect evidence “For Appointment Setting in The UK, We are dedicated and results driven professionals can use cold calling new potential customers as well as contacting past customers to help…” Source: RevenueBase Database · checked Sep 13, 2026
14	European Gateway Consulting Group	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	18 contacts →
	Indirect evidence “Global Connections with European Gateway At European Gateway, we are dedicated to connecting technology companies and customers on a global scale.” Source: RevenueBase Database · checked Sep 13, 2026
15	Terran Connect	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	17 contacts →
	Partial evidence “Terran Connect: Your Growth Partner for Sales, Marketing, and VC Funding At Terran Connect, we help companies achieve their growth objectives through focused execution and…” Source: RevenueBase Database · checked Sep 13, 2026
16	JBI Advertising	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	17 contacts →
	Indirect evidence “Our mission is to empower businesses across various sectors, locally and globally, by delivering innovative performance driven lead generation solutions.” Source: RevenueBase Database · checked Sep 13, 2026
17	BIG Wolf Marketing	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
18	Adds Corporation	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
19	The Sales Centre	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	14 contacts →
	Partial evidence “We are an outsourcing agency specializing in sales, marketing, and customer support.” Source: RevenueBase Database · checked Sep 13, 2026
20	salesflow.io	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	13 contacts →
	Partial evidence “Salesflow is a simple and effective lead-generation platform that enables Sales Teams, Agencies and growing SMBs to generate quality leads fast.” Source: RevenueBase Database · checked Sep 13, 2026
21	Business Hunters	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	13 contacts →
	Partial evidence “Business Hunters is a strategic B2B enterprise sales consultancy that helps businesses accelerate revenue growth by managing the full sales cycle from prospecting to closing deals.” Source: RevenueBase Database · checked Sep 13, 2026
22	Slsbmb Agency	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	12 contacts →
	Partial evidence “SLSBMB is an international IT B2B Sales Performance agency.” Source: RevenueBase Database · checked Sep 13, 2026
23	Callent Tech LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	11 contacts →
	Indirect evidence “Welcome to Callent Tech, The Future of B2B Demand Generation.” Source: RevenueBase Database · checked Sep 13, 2026
24	Transaction Focus	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	10 contacts →
	Partial evidence “Transaction Focus is a leading Global outsourced sales and marketing company with headquarters in the United Kingdom with connections and associates based in China,the USA…” Source: RevenueBase Database · checked Sep 13, 2026
25	Momentum Outbound	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	10 contacts →
	Partial evidence “Momentum Outbound helps growing SMEs run the operational side of commercial growth.” Source: RevenueBase Database · checked Sep 13, 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 335 outbound sales agencies based in London, United Kingdom

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Outbound sales agencies based in London, United Kingdom at a glance

As of Sep 13, 2026

19.0%Verified-email coverage

4.0%Mobile-number coverage

8.6Average contacts per company

1-10Median size (employees)

97.3%Largest-city concentration · London

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

233

11-50

51-200

201-500

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 16.0d

4200–30

11831–60

261–90

090–180

9180+

Company record updated

Median 78.0d

00–30

1,04531–60

1,23761–90

42790–180

180180+

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 London, 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 London 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, 549 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 13, 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 in the United Kingdom

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 London, United Kingdom?

RevenueBase identified 335 outbound sales agencies headquartered in London, 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 549 verified decision-maker contacts tracked across these 335 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 13, 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.