Company lists · Data refreshed September 2026

Top 25 Business development outsourcers based in London, United Kingdom

Name: Business development outsourcers based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 473 companies tracked

RevenueBase identified 473 business development outsourcers headquartered in London, United Kingdom as of September 2026 and tracks 2,899 professional contacts across them, including 364 with verified work emails. London is the largest hub.

This list covers business development outsourcers 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 19, 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 19, 2026 86% judged on-target in blind review

473Companies

2,899Contacts tracked

364Verified emails

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The 25 largest business development outsourcers based in London, United Kingdom

Ranked by team size

Top 25 of 473 business development outsourcers based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to business development outsourcers: 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	Engagetech	Partial evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
2	The Point Company	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	160 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 19, 2026
3	Xanadutec	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	70 contacts →
	Indirect evidence “We are a 400 member strong, specialist business process outsourcing (BPO) provider that caters to the diverse and complex information processing needs of todays corporation.” Source: RevenueBase Database · checked Sep 19, 2026
4	Salesar	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	59 contacts →
	Indirect evidence “Looking to fill your calendar with qualified calls?” Source: RevenueBase Database · checked Sep 19, 2026
5	Xlr8	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	59 contacts →
	Indirect evidence “Consult us for.” Source: RevenueBase Database · checked Sep 19, 2026
6	Topboffin	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	53 contacts →
	Indirect evidence “Most UK SMEs hit the same two walls.” Source: RevenueBase Database · checked Sep 19, 2026
7	FLY PIE LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	48 contacts →
	Indirect 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 19, 2026
8	Stack Solutions Group	Indirect evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
9	auxilium.digital	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “Auxilium Digital helps businesses with limited resources, higher operational costs achieve utmost customer satisfaction through providing customized offshore development teams…” Source: RevenueBase Database · checked Sep 19, 2026
10	Xcellerate Labs	Indirect evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
11	Outbound Partners	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect evidence “Outbound Partners helps B2B companies generate pipeline through structured outbound.” Source: RevenueBase Database · checked Sep 19, 2026
12	RCR Partnership	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	24 contacts →
	Partial evidence “We help you work out what marketing and business development you should be doing (the strategy) AND how to get it done (the implementation).” Source: RevenueBase Database · checked Sep 19, 2026
13	European Gateway Consulting Group	Indirect evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
14	JBI Advertising	Indirect evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
15	Terran Connect	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	17 contacts →
	Indirect 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 19, 2026
16	Corextreme Technologies	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Are you starting a business and need affordable solutions to help it grow?” Source: RevenueBase Database · checked Sep 19, 2026
17	BIG Wolf Marketing	Indirect evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
18	Adds Corporation	Indirect evidence	London, United KingdomHQ checked Sep 19, 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 19, 2026
19	Matlay	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	15 contacts →
	Indirect evidence “We are a full range Business Process Outsourcing company with innovative and cost-effective technology services to help our customers focus on their primary business objectives…” Source: RevenueBase Database · checked Sep 19, 2026
20	The Sales Centre	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	14 contacts →
	Indirect evidence “We are an outsourcing agency specializing in sales, marketing, and customer support.” Source: RevenueBase Database · checked Sep 19, 2026
21	salesflow.io	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect 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 19, 2026
22	Business Hunters	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect 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 19, 2026
23	Anybpo	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	11 contacts →
	Indirect evidence “About AnyBPO: AnyBPO is an international consulting company specializing in Business Process Outsourcing (BPO) solutions.” Source: RevenueBase Database · checked Sep 19, 2026
24	Callent Tech LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	11 contacts →
	Indirect evidence “Welcome to Callent Tech, The Future of B2B Demand Generation.” Source: RevenueBase Database · checked Sep 19, 2026
25	Transaction Focus	Partial evidence	London, United KingdomHQ checked Sep 19, 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 19, 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: business development outsourcers. 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 business development outsourcers.
Partial evidence: Its own public description names part of business development outsourcers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business development outsourcers. 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 473 business development outsourcers based in London, United Kingdom

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Business development outsourcers based in London, United Kingdom at a glance

As of Sep 19, 2026

12.6%Verified-email coverage

6.1Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

334

11-50

103

51-200

201-500

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 473 companies.

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 business development outsourcers, 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 “business development outsourcers”. 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 business development outsourcers), 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 business development outsourcers, 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, 364 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 19, 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.

Business development outsourcers by metro in the United Kingdom

Business development outsourcers in London473
Business development outsourcers in Manchester67
Business development outsourcers in Birmingham26

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 business development outsourcers, 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 business development outsourcers are there based in London, United Kingdom?

RevenueBase identified 473 business development outsourcers 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?

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

Which city has the most business development outsourcers?

London leads with 473 headquartered companies, followed by Manchester (67) and Birmingham (26).

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 364 verified decision-maker contacts tracked across these 473 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 19, 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.