Company lists · Data refreshed September 2026

Top 25 Client success consulting firms worldwide

Name: Client success consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 48,141 companies tracked

RevenueBase identified 48,141 client success consulting firms worldwide as of September 2026 and tracks 349,138 professional contacts across them, including 81,029 with verified work emails. The United States is the largest market and London the largest hub.

This list covers client success consulting firms 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 27, 2026. Country and city lists for client success consulting firms 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 RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

48,141Companies

349,138Contacts tracked

81,029Verified emails

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The 25 largest client success consulting firms worldwide

Ranked by team size

Top 25 of 48,141 client success consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to client success 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	Mercer	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	10001+	20,868 contacts →
	Partial evidence “At Mercer, A Marsh business, we’re helping our clients realize their investment objectives, shape the future of work, and enhance health and retirement outcomes for their people.” Source: RevenueBase Database · checked Sep 27, 2026
2	Kearney	Partial evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	5,001-10,000	6,978 contacts →
	Partial evidence “As one of the original firms, we’ve never lost sight of the fact that consulting is a people business.” Source: RevenueBase Database · checked Sep 27, 2026
3	Accenture Strategy & Consulting	Partial evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	5,001-10,000	5,514 contacts →
	Partial evidence “Accenture Strategy combines deep industry expertise, advanced analytics capabilities and human-led design methodologies that enable clients to act with speed and confidence.” Source: RevenueBase Database · checked Sep 27, 2026
4	Eficacia	Partial evidence	Cali, ColombiaHQ checked Sep 27, 2026	10001+	4,692 contacts →
	Partial evidence “Incrementamos la productividad y eficiencia de nuestros clientes- Más de 40 años de experiencia en el mercado- Líderes en Soluciones de Mercadeo, Trade Marketing, Ventas y Gestión…” Source: RevenueBase Database · checked Sep 27, 2026
5	Management Solutions	Partial evidence	Madrid, SpainHQ checked Sep 27, 2026	1,001-5,000	4,468 contacts →
	Partial evidence “Management Solutions is a leading provider of business consulting services for regulated industries.” Source: RevenueBase Database · checked Sep 27, 2026
6	SX Negócios	Partial evidence	Novo Hamburgo, BrazilHQ checked Sep 27, 2026	5,001-10,000	4,020 contacts →
	Partial evidence “Somos a Pulse Client Experts, uma empresa em constante evolução, impulsionados pela vontade de fazer acontecer.” Source: RevenueBase Database · checked Sep 27, 2026
7	Monitor Deloitte	Indirect evidence	United StatesHQ checked Sep 27, 2026	5,001-10,000	3,116 contacts →
	Indirect evidence “To navigate the future with confidence, organizations need to make and act upon the right choices: clear, timely and inspirational choices that deliver growth in a dynamic…” Source: RevenueBase Database · checked Sep 27, 2026
8	Protiviti India Member Firm	Partial evidence	New Delhi, IndiaHQ checked Sep 27, 2026	5,001-10,000	2,652 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 27, 2026
9	Arthur D. Little	Indirect evidence	Brussels, BelgiumHQ checked Sep 27, 2026	1,001-5,000	2,186 contacts →
	Indirect evidence “As people, organizations and societies embrace change at pace, its leaders must anticipate, innovate and transform ever faster.” Source: RevenueBase Database · checked Sep 27, 2026
10	Baringa	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	2,179 contacts →
	Partial evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 27, 2026
11	MCA	Strong evidence	Westport, CT, United StatesHQ checked Sep 27, 2026	n/a	1,650 contacts →
	Strong evidence “MCAworks is a strategic marketing consulting firm passionately dedicated to helping our clients accelerate and sustain business growth.” Source: RevenueBase Database · checked Sep 27, 2026
12	P3	Partial evidence	Stuttgart, GermanyHQ checked Sep 27, 2026	1,001-5,000	1,468 contacts →
	Partial evidence “P3 group is an independent, owner-managed technology and management consulting group founded in 1996.” Source: RevenueBase Database · checked Sep 27, 2026
13	EXL Services LTD	Indirect evidence	n/a	n/a	1,373 contacts →
	Indirect evidence “Established in 1994, we provide a blend of business strategy, marketing services, behavioural change and executive coaching services and techniques to help grow the business of…” Source: RevenueBase Database · checked Sep 27, 2026
14	JLT Group	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	n/a	1,361 contacts →
	Indirect evidence “As of April 1, 2019, JLT Group is now part of Marsh & McLennan Companies (MMC).” Source: RevenueBase Database · checked Sep 27, 2026
15	SEGAL	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,149 contacts →
	Partial evidence “Segal is a leading employee-owned consulting firm with more than 1,100 professionals across North America, including 150+ credentialed actuaries.” Source: RevenueBase Database · checked Sep 27, 2026
16	W3global	Partial evidence	Frisco, TX, United StatesHQ checked Sep 27, 2026	501-1,000	1,149 contacts →
	Partial evidence “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Source: RevenueBase Database · checked Sep 27, 2026
17	Rubinbrown LLP	Indirect evidence	Saint Louis, MO, United StatesHQ checked Sep 27, 2026	501-1,000	1,056 contacts →
	Indirect evidence “RubinBrown provides unmatched service to closely held and publicly traded companies in specialized market sectors as well as non-profit and public sector organizations.” Source: RevenueBase Database · checked Sep 27, 2026
18	Alpha FMC	Partial evidence	London, IndiaHQ checked Sep 27, 2026	1,001-5,000	1,041 contacts →
	Partial evidence “Alpha Financial Markets Consulting is a leading global consultancy to the financial services industry.” Source: RevenueBase Database · checked Sep 27, 2026
19	Oc&c Strategy Consultants	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	501-1,000	1,011 contacts →
	Indirect evidence “At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.” Source: RevenueBase Database · checked Sep 27, 2026
20	Baker Tilly Netherlands	Indirect evidence	Utrecht, NetherlandsHQ checked Sep 27, 2026	1,001-5,000	996 contacts →
	Indirect evidence “Meer dan cijfers: wij zijn jouw partner in groei Bij Baker Tilly kijken we verder.” Source: RevenueBase Database · checked Sep 27, 2026
21	Falconi	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 27, 2026	501-1,000	990 contacts →
	Indirect evidence “A Falconi é a maior consultoria brasileira de gestão empresarial.” Source: RevenueBase Database · checked Sep 27, 2026
22	Paragon	Partial evidence	Cranford, NJ, United StatesHQ checked Sep 27, 2026	501-1,000	936 contacts →
	Partial evidence “Paragon is a now part of CGI (cgi.com), a global IT and business consulting services firm.” Source: RevenueBase Database · checked Sep 27, 2026
23	Go2b	Indirect evidence	São Paulo, BrazilHQ checked Sep 27, 2026	n/a	815 contacts →
	Indirect evidence “Criada em 2013, a Goiás Business nasceu para fornecer consultoria comercial para uma grande empresa de soluções em recursos humanos, tendo como resultado a geração de mais de 1.8…” Source: RevenueBase Database · checked Sep 27, 2026
24	Square Management	Partial evidence	Neuilly Sur Seine, FranceHQ checked Sep 27, 2026	501-1,000	719 contacts →
	Partial evidence “Square Management est un cabinet de conseil spécialisé en stratégie et organisation qui accompagne ses clients dans l’anticipation, la conception et la réalisation de leurs…” Source: RevenueBase Database · checked Sep 27, 2026
25	デロイトトーマツコンサルティング(合同)	Partial evidence	千代田区, JapanHQ checked Sep 27, 2026	501-1,000	696 contacts →
	Partial evidence “is a management consulting company based out of, Japan.” Source: RevenueBase Database · checked Sep 27, 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: client success 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 client success consulting firms.
Partial evidence: Its own public description names part of client success consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name client success 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 48,141 client success consulting firms worldwide

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Client success consulting firms worldwide at a glance

As of Sep 27, 2026

23.2%Verified-email coverage

7.3Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

37,653

11-50

8,332

51-200

1,539

201-500

292

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 client success 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.
Coverage: Every country. Country and city lists for client success consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “client success 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 client success 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 client success consulting firms, 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, 81,029 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 27, 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.

Client success consulting firms by location

176 lists · largest first

Every Client success consulting firms 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 client success 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 client success consulting firms are there worldwide?

RevenueBase identified 48,141 client success consulting firms 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?

Mercer, headquartered in New York, tops this list with the largest team on record.

Which country has the most client success consulting firms?

The United States leads with 12,339 companies, followed by Brazil (2,508) and the United Kingdom (2,354). Every client success consulting firms list by country and city is linked on this page.

Which city has the most client success consulting firms?

London leads with 866 headquartered companies, followed by Sao Paulo (718) and Paris (590).

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 81,029 verified decision-maker contacts tracked across these 48,141 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 27, 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.