Company lists · Data refreshed September 2026

Top 25 Enterprise communication consulting firms based in London, United Kingdom

Name: Enterprise communication consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 299 companies tracked

RevenueBase identified 299 enterprise communication consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 2,294 professional contacts across them, including 802 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise communication consulting firms 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 28, 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 28, 2026 86% judged on-target in blind review

299Companies

2,294Contacts tracked

802Verified emails

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The 25 largest enterprise communication consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 299 enterprise communication consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise communication consulting firms: 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	Cartesian	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	302 contacts →
	Partial evidence “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Source: RevenueBase Database · checked Sep 28, 2026
2	Radley Yeldar	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	198 contacts →
	Partial evidence “Radley Yeldar is an award-winning, independent London and Birmingham-based creative consultancy with more than 200 communications specialists.” Source: RevenueBase Database · checked Sep 28, 2026
3	Havas People	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	170 contacts →
	Indirect evidence “At Havas People we shape meaningful brands for the changing worlds of work and study.” Source: RevenueBase Database · checked Sep 28, 2026
4	SOH	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	96 contacts →
	Partial evidence “We’re service communication experts – using a mix of science, creativity and service know-how to improve how you talk with your customers through all channels and media, from…” Source: RevenueBase Database · checked Sep 28, 2026
5	AB	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	40 contacts →
	Indirect evidence “We help organisations reach their full potential by engaging, informing and inspiring their audiences.” Source: RevenueBase Database · checked Sep 28, 2026
6	Decision Inc. UK	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	35 contacts →
	Indirect evidence “Decision Inc.” Source: RevenueBase Database · checked Sep 28, 2026
7	JB Communications LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “We believe that developing the right dialogue helps our clients change mind-sets and create new ways of engagement, driving positive business results.” Source: RevenueBase Database · checked Sep 28, 2026
8	Maple Networks	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	30 contacts →
	Indirect evidence “We’re the team that the IT leaders of tech-dependant organisations come to when they need to really shake things up, innovate (effectively), and tackle their transformational…” Source: RevenueBase Database · checked Sep 28, 2026
9	JP Reis	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	26 contacts →
	Indirect evidence “JP Reis helps financial trading organizations make better technology decisions and deliver complex transformation programs with confidence.” Source: RevenueBase Database · checked Sep 28, 2026
10	Streets Consulting	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Strong evidence “Streets Consulting Ltd is a business development, marketing and communications consultancy supporting international financial services, technology and fast-growth companies.” Source: RevenueBase Database · checked Sep 28, 2026
11	RND Systems Integration	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “RnD Systems Integration is an IT consultancy based in, London.” Source: RevenueBase Database · checked Sep 28, 2026
12	Voyager Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Voyager Solutions provide business change and implementation support for process, people and technology transformation programmes.” Source: RevenueBase Database · checked Sep 28, 2026
13	Seven Consultancy	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “We are a team of experts who are passionate about the brands and organisations we work with.” Source: RevenueBase Database · checked Sep 28, 2026
14	Platform Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “Propel Your Business Own the narrative, elevate your brand and drive sales success with our complete comms offering based on decades of industry experience.” Source: RevenueBase Database · checked Sep 28, 2026
15	AGL Communication	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “Why great communication matters: We believe great communication is what turns individuals into teams and effort into progress.” Source: RevenueBase Database · checked Sep 28, 2026
16	Bowen Craggs	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “We are experts in global online corporate communications.” Source: RevenueBase Database · checked Sep 28, 2026
17	Cedar Consulting NOW Version 1	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Cedar Consulting (Cedar) provides Application, Business, Technology and Training consulting services on a global basis, with offices in the United Kingdom, Switzerland, Australia…” Source: RevenueBase Database · checked Sep 28, 2026
18	Recenso Services	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Our sole mission is to help you deliver successful programmes faster.” Source: RevenueBase Database · checked Sep 28, 2026
19	HEED	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Heed is a leading provider of innovative communication solutions for the modern workplace.” Source: RevenueBase Database · checked Sep 28, 2026
20	Frank, Bright & Abel	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “Frank, Bright & Abel is a creative communications consultancy shaped to fit our clients' brand, employer brand, marketing and communications challenges.” Source: RevenueBase Database · checked Sep 28, 2026
21	Asygma	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	12 contacts →
	Indirect evidence “At Asygma, we're more than a technology provider; we're your trusted advisor and partner in growth.” Source: RevenueBase Database · checked Sep 28, 2026
22	Celicourt Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “The Celicourt team has considerable experience advising clients ranging from small fast growing businesses to some of the world's leading companies, as well as supporting…” Source: RevenueBase Database · checked Sep 28, 2026
23	Indaba Communications	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Communication at its best starts with a conversation." That is the meaning behind Indaba, and it is the philosophy that drives our agency.” Source: RevenueBase Database · checked Sep 28, 2026
24	Acumen BAY Consultancy Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Most organisations don't have a technology problem.” Source: RevenueBase Database · checked Sep 28, 2026
25	Bright Space Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “We are Bright Space – an award winning, strategy-led creative consultancy that helps businesses communicate value where it matters most.” Source: RevenueBase Database · checked Sep 28, 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: enterprise communication consulting firms. 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 enterprise communication consulting firms.
Partial evidence: Its own public description names part of enterprise communication consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise communication consulting firms. 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 299 enterprise communication consulting firms based in London, United Kingdom

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Enterprise communication consulting firms based in London, United Kingdom at a glance

As of Sep 28, 2026

35.0%Verified-email coverage

7.7Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

205

11-50

51-200

201-500

1,001-5,000

5,001-10,000

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 299 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 enterprise communication consulting firms, 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 “enterprise communication consulting firms”. 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 enterprise communication consulting firms), 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 enterprise communication consulting firms, 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, 802 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 28, 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.

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 enterprise communication consulting firms, 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 enterprise communication consulting firms are there based in London, United Kingdom?

RevenueBase identified 299 enterprise communication consulting firms 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?

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

Which city in the United Kingdom has the most enterprise communication consulting firms?

London leads the United Kingdom with 299 headquartered companies, followed by Birmingham (11) and Bristol (10).

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 802 verified decision-maker contacts tracked across these 299 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 28, 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.