Company lists · Data refreshed September 2026

Top 25 Thought leadership consultancies worldwide

Name: Thought leadership consultancies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 17,753 companies tracked

RevenueBase identified 17,753 thought leadership consultancies worldwide as of September 2026 and tracks 67,858 professional contacts across them, including 13,468 with verified work emails. The United States is the largest market and London the largest hub.

This list covers thought leadership consultancies worldwide, 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 29, 2026. Country and city lists for thought leadership consultancies follow the table.

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 29, 2026 86% judged on-target in blind review

17,753Companies

67,858Contacts tracked

13,468Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest thought leadership consultancies worldwide

Ranked by team size

Top 25 of 17,753 thought leadership consultancies worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to thought leadership consultancies: 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	Idol Image Consulting	Indirect evidence	Kula, HI, TürkiyeHQ checked Sep 29, 2026	n/a	12,976 contacts →
	Indirect evidence “IDOL Image Consulting has developed strategies to help individuals, groups or corporate organizations face today’s challenges and fierce competition.” Source: RevenueBase Database · checked Sep 29, 2026
2	FGS Global	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,814 contacts →
	Partial evidence “FGS Global is the strategic leadership advisory for a complex world.” Source: RevenueBase Database · checked Sep 29, 2026
3	Miltton	Indirect evidence	Helsinki, FinlandHQ checked Sep 29, 2026	201-500	269 contacts →
	Indirect evidence “We are an explorative, dynamic and constantly curious consulting group, equipped to offer insight and inspiration to our clients in a changing world.” Source: RevenueBase Database · checked Sep 29, 2026
4	Sheffield Haworth	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	244 contacts →
	Indirect evidence “Sheffield Haworth is a global consultancy founded in 1993.” Source: RevenueBase Database · checked Sep 29, 2026
5	Medialink	Indirect evidence	Beverly Hills, CA, United StatesHQ checked Sep 29, 2026	51-200	204 contacts →
	Indirect evidence “MediaLink is the leading consulting firm serving the media and marketing industry’s C-suite.” Source: RevenueBase Database · checked Sep 29, 2026
6	Hanover Communications	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	177 contacts →
	Indirect evidence “Hanover is an award-winning communications consultancy that advises enterprises, institutions, and individuals on rewiring their strategies for long-term success.” Source: RevenueBase Database · checked Sep 29, 2026
7	TACT	Indirect evidence	Québec, QC, CanadaHQ checked Sep 29, 2026	51-200	175 contacts →
	Indirect evidence “Founded in September 2011, TACT Intelligence-conseil is composed of a group of experienced, professional communicators seeking to create a Québec-owned consulting agency.” Source: RevenueBase Database · checked Sep 29, 2026
8	Newlink Spain	Indirect evidence	Madrid, SpainHQ checked Sep 29, 2026	51-200	175 contacts →
	Indirect evidence “Newlink es una consultora internacional con más de 20 años en el sector, con sede en Miami (EE.UU.) y oficinas en España y en numerosos países de Latinoamérica.” Source: RevenueBase Database · checked Sep 29, 2026
9	Orchestra	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 2026	501-1,000	166 contacts →
	Indirect evidence “Orchestra is a strategic communications and marketing company purpose-built for a world defined by speed, fragmentation and unprecedented transparency.” Source: RevenueBase Database · checked Sep 29, 2026
10	Signium	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	51-200	156 contacts →
	Indirect evidence “What got us here won’t get us there… Business today is more volatile and unpredictable than ever.” Source: RevenueBase Database · checked Sep 29, 2026
11	Quadrangle	Partial evidence	Noida, IndiaHQ checked Sep 29, 2026	51-200	153 contacts →
	Partial evidence “Quadrangle, a division of InfoEdge India Ltd, is a trusted talent advisory partner that has been shaping leadership for over 25 years.” Source: RevenueBase Database · checked Sep 29, 2026
12	Lansons Team Farner	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	143 contacts →
	Indirect evidence “Organisations and brands turn to us to shape, protect and transform their reputations.” Source: RevenueBase Database · checked Sep 29, 2026
13	Hager Executive Consulting Gmbh	Partial evidence	Frankfurt Am Main, GermanyHQ checked Sep 29, 2026	51-200	137 contacts →
	Partial evidence “HAGER is the leading global leadership consultancy, empowering leaders to tackle complex challenges with human-centered solutions.” Source: RevenueBase Database · checked Sep 29, 2026
14	Aiir Consulting	Partial evidence	Bala Cynwyd, PA, United StatesHQ checked Sep 29, 2026	51-200	135 contacts →
	Partial evidence “At AIIR Consulting, we believe leadership is the greatest lever for change.” Source: RevenueBase Database · checked Sep 29, 2026
15	The RBL Group	Indirect evidence	Provo, UT, United StatesHQ checked Sep 29, 2026	51-200	132 contacts →
	Indirect evidence “The RBL Group is a consulting and development firm.” Source: RevenueBase Database · checked Sep 29, 2026
16	Modern Executive Solutions	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	51-200	121 contacts →
	Indirect evidence “Modern Executive Solutions helps organizations and leaders shape what’s next.” Source: RevenueBase Database · checked Sep 29, 2026
17	Eric Salmon & Partners	Partial evidence	Paris, ItalyHQ checked Sep 29, 2026	51-200	116 contacts →
	Partial evidence “Eric Salmon & Partners is a leading leadership and talent consulting firm that specializes in Executive Search, Governance Advisory & Leadership Advisory.” Source: RevenueBase Database · checked Sep 29, 2026
18	FDC	Indirect evidence	Cape Town, South AfricaHQ checked Sep 29, 2026	51-200	115 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
19	Copper Consultancy	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	114 contacts →
	Indirect evidence “At Copper, we combine insight, intelligence and creative communications expertise to deliver measurable impact for our clients.” Source: RevenueBase Database · checked Sep 29, 2026
20	Novus Global	Indirect evidence	Marina Del Rey, CA, United StatesHQ checked Sep 29, 2026	51-200	113 contacts →
	Indirect evidence “Novus Global partners with leaders and organizations to drive meaningful, measurable transformation.” Source: RevenueBase Database · checked Sep 29, 2026
21	Gennesys	Indirect evidence	Goiânia, BrazilHQ checked Sep 29, 2026	51-200	112 contacts →
	Indirect evidence “A LARGADA DA HISTÓRIA Criado em 1995, o Grupo Gennesys prontamente se destacou no mercado local pelo investimento diferenciado em capital humano e a experiência internacional de…” Source: RevenueBase Database · checked Sep 29, 2026
22	Sámara	Indirect evidence	Santiago, ChileHQ checked Sep 29, 2026	11-50	111 contacts →
	Indirect evidence “Sámara es una consultora de comunicaciones que desde sus inicios en 2005, ha buscado contribuir a cargar de sentido las comunicaciones de instituciones, organismos, empresas y…” Source: RevenueBase Database · checked Sep 29, 2026
23	We DO Advisory	Indirect evidence	Roma, ItalyHQ checked Sep 29, 2026	501-1,000	107 contacts →
	Indirect evidence “Designing the next edge of management advisory.#BeTheDifference” Source: RevenueBase Database · checked Sep 29, 2026
24	SNP Communications	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	11-50	102 contacts →
	Indirect evidence “We help the world's most interesting companies by making their content clear and delivery memorable.” Source: RevenueBase Database · checked Sep 29, 2026
25	IMI International	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 29, 2026	51-200	97 contacts →
	Indirect evidence “IMI International is an independent marketing consultancy focused on insight driving profit.” Source: RevenueBase Database · checked Sep 29, 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: thought leadership consultancies. 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 thought leadership consultancies.
Partial evidence: Its own public description names part of thought leadership consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name thought leadership consultancies. 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 17,753 thought leadership consultancies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 13,468 reachable decision-makers.

Free signup · no credit card

View the full list →

Thought leadership consultancies worldwide at a glance

As of Sep 29, 2026

19.8%Verified-email coverage

3.8Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

16,119

11-50

1,376

51-200

184

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 thought leadership consultancies, 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.
Coverage: Every country. Country and city lists for thought leadership consultancies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “thought leadership consultancies”. 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 thought leadership consultancies), 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 thought leadership consultancies, and records with no verified work email.
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, 13,468 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 29, 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.

Thought leadership consultancies by location

81 lists · largest first

Every Thought leadership consultancies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 thought leadership consultancies, 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 thought leadership consultancies are there worldwide?

RevenueBase identified 17,753 thought leadership consultancies worldwide 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?

Idol Image Consulting, headquartered in Kula, tops this list with the largest team on record.

Which country has the most thought leadership consultancies?

The United States leads with 5,362 companies, followed by the United Kingdom (1,291) and France (679). Every thought leadership consultancies list by country and city is linked on this page.

Which city has the most thought leadership consultancies?

London leads with 572 headquartered companies, followed by New York (335) and Paris (259).

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 13,468 verified decision-maker contacts tracked across these 17,753 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 29, 2026.

Ready to reach these companies? Verified emails and direct dials for all 17,753 thought leadership consultancies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.