Company lists · Data refreshed September 2026

Top 25 Multichannel outbound agencies based in London, United Kingdom

Name: Multichannel outbound 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 14, 2026 324 companies tracked

RevenueBase identified 324 multichannel outbound agencies headquartered in London, United Kingdom as of September 2026 and tracks 2,282 professional contacts across them, including 583 with verified work emails. London is the largest hub.

This list covers multichannel outbound 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 14, 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 14, 2026 86% judged on-target in blind review

324Companies

2,282Contacts tracked

583Verified emails

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

Ranked by team size

Top 25 of 324 multichannel outbound agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to multichannel outbound 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 14, 2026	201-500	401 contacts →
	Indirect evidence “MVF powers growth for our clients by connecting them to potential customers.” Source: RevenueBase Database · checked Sep 14, 2026
2	MBA Group LTD	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	201-500	222 contacts →
	Indirect evidence “To us, the ability to communicate effectively is not a commodity and we are proud to possess the right balance of technology and services.” Source: RevenueBase Database · checked Sep 14, 2026
3	Internal Results	Indirect evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
4	Salesar	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	59 contacts →
	Indirect evidence “Looking to fill your calendar with qualified calls?” Source: RevenueBase Database · checked Sep 14, 2026
5	AMS Media Group	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	50 contacts →
	Indirect evidence “From our office in London & Leeds, we seamlessly plan and buy media across all channels: digital, TV, cinema, OOH, radio, print, social and search.” Source: RevenueBase Database · checked Sep 14, 2026
6	Digiio	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	28 contacts →
	Indirect evidence “At digiio we pioneer innovative campaigns, approaches and intelligence that unlock interest and capture the imagination of our client’s customers.” Source: RevenueBase Database · checked Sep 14, 2026
7	Xcellerate Labs	Indirect evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
8	Smithfield Agency	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	24 contacts →
	Indirect evidence “Where people and creativity drive real results.” Source: RevenueBase Database · checked Sep 14, 2026
9	Guerillascope	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	21 contacts →
	Indirect evidence “Guerillascope is a full-service media agency, with serious chops across AV, out-of-home, publishers, digital, and partnerships.” Source: RevenueBase Database · checked Sep 14, 2026
10	RED Interactive Limited	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	18 contacts →
	Indirect evidence “RedInteractive is a strategic marketing agency specialising in developing and driving channels for sales and customer acquisition for online companies.” Source: RevenueBase Database · checked Sep 14, 2026
11	ARM Direct LTD	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	18 contacts →
	Indirect evidence “THANK YOU FOR VISITING THE ARM DIRECT PAGE: ARM DIRECT LTD + ARM DIRECT GROUP LTD We are a specialist Full-Service Direct Response Agency offering a combination of Media Buying +…” Source: RevenueBase Database · checked Sep 14, 2026
12	BIG Wolf Marketing	Indirect evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
13	Adds Corporation	Indirect evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
14	The Sales Centre	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	14 contacts →
	Indirect evidence “We are an outsourcing agency specializing in sales, marketing, and customer support.” Source: RevenueBase Database · checked Sep 14, 2026
15	salesflow.io	Indirect evidence	London, United KingdomHQ checked Sep 14, 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 14, 2026
16	Electric Octopus	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	13 contacts →
	Indirect evidence “Electric Octopus Mobile-First B2B Growth: Clay Wizards \| Mobile Funnels \|#1 Ranked Link Building In 13+ years: 770+ clients served \|$1.2B in sales pipelines \|$200M+ closed in 2024…” Source: RevenueBase Database · checked Sep 14, 2026
17	Callent Tech LTD	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	11 contacts →
	Indirect evidence “Welcome to Callent Tech, The Future of B2B Demand Generation.” Source: RevenueBase Database · checked Sep 14, 2026
18	Lavery Rowe Advertising	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	10 contacts →
	Indirect evidence “Lavery Rowe Advertising has over 30 years experience in Direct Response and Performance Marketing.” Source: RevenueBase Database · checked Sep 14, 2026
19	Crate Media Group	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	8 contacts →
	Indirect evidence “We specialise in Display, Social, Native, Video, Search, Programmatic TV, Digital Radio & Digital Out of Home, alongside Creative services, seamlessly unifying cross-channel…” Source: RevenueBase Database · checked Sep 14, 2026
20	Blue Market Media	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	7 contacts →
	Indirect evidence “Through package inserts, door drops, and direct mail; we boost brands that want to add to their digital marketing.” Source: RevenueBase Database · checked Sep 14, 2026
21	Fluid DM	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	7 contacts →
	Indirect evidence “Paid media campaigns designed to help businesses generate more leads and sales.” Source: RevenueBase Database · checked Sep 14, 2026
22	Demand Studio	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	7 contacts →
	Indirect evidence “Demand Studio is a B2B marketing services company with a highly experienced team and 250+ operational resources worldwide.” Source: RevenueBase Database · checked Sep 14, 2026
23	Neptik	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	7 contacts →
	Indirect evidence “Neptik is a highly effective, cost efficient, B2B lead generation specialist.” Source: RevenueBase Database · checked Sep 14, 2026
24	B2B Consultancy Services	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	7 contacts →
	Indirect evidence “Generating new business leads in a cost effective and scalable way is challenging in a B2B environment.” Source: RevenueBase Database · checked Sep 14, 2026
25	Kontiki Media	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	7 contacts →
	Indirect evidence “Kontiki Media: Your Partner in Digital and Relationship Marketing Kontiki Media is a rapidly growing digital marketing company with a team of 45 professionals, headquartered in…” Source: RevenueBase Database · checked Sep 14, 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: multichannel outbound 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 multichannel outbound agencies.
Partial evidence: Its own public description names part of multichannel outbound agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name multichannel outbound 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 324 multichannel outbound agencies based in London, United Kingdom

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Multichannel outbound agencies based in London, United Kingdom at a glance

As of Sep 14, 2026

25.5%Verified-email coverage

7.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

228

11-50

51-200

201-500

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 324 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 multichannel outbound 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 “multichannel outbound 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 multichannel outbound 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 multichannel outbound 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, 583 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 14, 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.

Multichannel outbound agencies by metro in the United Kingdom

Multichannel outbound agencies in London324
Multichannel outbound agencies in Manchester57
Multichannel outbound agencies in Birmingham25

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 multichannel outbound 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 multichannel outbound agencies are there based in London, United Kingdom?

RevenueBase identified 324 multichannel outbound 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 multichannel outbound agencies?

London leads with 324 headquartered companies, followed by Manchester (57) 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 583 verified decision-maker contacts tracked across these 324 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 14, 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.