Company lists · Data refreshed September 2026

Top 25 Outsourcing advisory firms worldwide

Name: Outsourcing advisory firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 39,835 companies tracked

RevenueBase identified 39,835 outsourcing advisory firms worldwide as of September 2026 and tracks 348,012 professional contacts across them, including 76,415 with verified work emails. The United States is the largest market and London the largest hub.

This list covers outsourcing advisory 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 21, 2026. Country and city lists for outsourcing advisory 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

39,835Companies

348,012Contacts tracked

76,415Verified emails

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The 25 largest outsourcing advisory firms worldwide

Ranked by team size

Top 25 of 39,835 outsourcing advisory firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to outsourcing advisory 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	Alvarez & Marsal	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	10001+	13,099 contacts →
	Indirect evidence “Alvarez & Marsal is a leading global professional services firm dedicated to helping organizations tackle their most complex business issues, maximize stakeholder value, and…” Source: RevenueBase Database · checked Sep 21, 2026
2	Liderança Serviços	Indirect evidence	São José, BrazilHQ checked Sep 21, 2026	10001+	4,504 contacts →
	Indirect evidence “Atuamos nos principais setores de terceirização, e somos pioneiros na implantação de contratos à distância.” Source: RevenueBase Database · checked Sep 21, 2026
3	TOA Global	Indirect evidence	Southport, AustraliaHQ checked Sep 21, 2026	1,001-5,000	3,912 contacts →
	Indirect evidence “Don’t wait until understaffing eats away at your productivity and client satisfaction.” Source: RevenueBase Database · checked Sep 21, 2026
4	Integreon	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,678 contacts →
	Indirect evidence “Integreon is a trusted provider of legal, creative and business outsourced services to corporations and law firms worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
5	PT Danamas Insan Kreasi Andalan Dika	Partial evidence	Jakarta Pusat, IndonesiaHQ checked Sep 21, 2026	1,001-5,000	2,036 contacts →
	Partial evidence “PT Danamas Insan Kreasi Andalan (DIKA) adalah solusi outsourcing terpercaya untuk membantu bisnis Anda tumbuh lebih cepat dan efisien.” Source: RevenueBase Database · checked Sep 21, 2026
6	Covalen	Indirect evidence	Dublin 4, IrelandHQ checked Sep 21, 2026	1,001-5,000	2,020 contacts →
	Indirect evidence “Hello.” Source: RevenueBase Database · checked Sep 21, 2026
7	J.S. Held LLC	Indirect evidence	Jericho, NY, PalestineHQ checked Sep 21, 2026	1,001-5,000	1,954 contacts →
	Indirect evidence “J.S.” Source: RevenueBase Database · checked Sep 21, 2026
8	Emagine	Indirect evidence	Copenhagen, DenmarkHQ checked Sep 21, 2026	1,001-5,000	1,636 contacts →
	Indirect evidence “emagine is a high-end business & IT consulting company challenging the way businesses leverage high-end expertise.” Source: RevenueBase Database · checked Sep 21, 2026
9	Gemini Solutions PVT LTD	Partial evidence	Gurgaon, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,275 contacts →
	Partial evidence “Gemini Solutions is a global IT firm, a leading offshore outsourcing company with a specialized focus in financial services.” Source: RevenueBase Database · checked Sep 21, 2026
10	Information Evolution, INC	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	501-1,000	1,238 contacts →
	Partial evidence “We are a boutique outsourcing firm specializing in keeping our customers' databases up-to-date, accurate, and as robust as possible.” Source: RevenueBase Database · checked Sep 21, 2026
11	Cygnus	Partial evidence	Santiago, ChileHQ checked Sep 21, 2026	5,001-10,000	1,189 contacts →
	Partial evidence “Cygnus comienza sus operaciones en Abril de 1998 con el objetivo de ofrecer servicios de Outsourcing con una propuesta de valor innovadora: entregar soluciones a la medida de los…” Source: RevenueBase Database · checked Sep 21, 2026
12	Riveron	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,160 contacts →
	Indirect evidence “With over 1,200 professionals across 18 international offices, Riveron delivers tailored solutions for CFOs, private equity firms, and key stakeholders.” Source: RevenueBase Database · checked Sep 21, 2026
13	W3global	Indirect evidence	Frisco, TX, United StatesHQ checked Sep 21, 2026	501-1,000	1,149 contacts →
	Indirect 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 21, 2026
14	crystel.co	Partial evidence	Amman, JordanHQ checked Sep 21, 2026	1,001-5,000	1,128 contacts →
	Partial evidence “Crystel emerged as a leading Outsourcing Service Provider (OSP) since its establishment in Jordan in early 2007.” Source: RevenueBase Database · checked Sep 21, 2026
15	Zinnov	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 21, 2026	201-500	1,101 contacts →
	Partial evidence “Zinnov is a full-stack global management consulting firm specializing in GCC set-up and scale-up, M&A, PE advisory, AI strategy, and partner ecosystem growth for technology…” Source: RevenueBase Database · checked Sep 21, 2026
16	COGEP	Indirect evidence	Saint-doulchard, FranceHQ checked Sep 21, 2026	1,001-5,000	1,051 contacts →
	Indirect evidence “Une vision augmentée du conseil au service de votre réussite.” Source: RevenueBase Database · checked Sep 21, 2026
17	Paperchase Accountancy GDC	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,026 contacts →
	Indirect evidence “Paperchase Accountancy is a leading hospitality and consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
18	Eclaro	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,024 contacts →
	Indirect evidence “ECLARO is an award-winning Talent Solutions firm headquartered in New York City and operating in the U.S, Canada and the Philippines.” Source: RevenueBase Database · checked Sep 21, 2026
19	Inelcom, Ingeniería Electrónica Comercial	Partial evidence	Pozuelo De Alarcón, SpainHQ checked Sep 21, 2026	1,001-5,000	1,007 contacts →
	Partial evidence “Specialized services in order to provide to other companies outsourcing for activities, improving its performance and cost.” Source: RevenueBase Database · checked Sep 21, 2026
20	Head Field Solutions Pvt. LTD	Indirect evidence	Uttar Pradesh, IndiaHQ checked Sep 21, 2026	1,001-5,000	934 contacts →
	Indirect evidence “We, at Head Field, are a force to reckon with in offering total staffing solutions to offshore clients.” Source: RevenueBase Database · checked Sep 21, 2026
21	Solvo Global Careers	Indirect evidence	Medellín, ColombiaHQ checked Sep 21, 2026	1,001-5,000	933 contacts →
	Indirect evidence “Solvo is a strategic partner in North America which provides back-office support for US-based companies and turns it into our front office.” Source: RevenueBase Database · checked Sep 21, 2026
22	Eight Advisory	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	501-1,000	895 contacts →
	Partial evidence “Eight Advisory, Europe's leading independent advisory firm specialising in financial, operational and strategy consulting, is involved in transactions, restructuring and…” Source: RevenueBase Database · checked Sep 21, 2026
23	Perella Weinberg	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	883 contacts →
	Indirect evidence “Perella Weinberg is a leading global independent financial services firm, founded in 2006 to address the need for experienced, trusted and unconflicted advice in the financial…” Source: RevenueBase Database · checked Sep 21, 2026
24	Servestsa	Indirect evidence	Caracas, VenezuelaHQ checked Sep 21, 2026	n/a	865 contacts →
	Indirect evidence “Statistics first” Source: RevenueBase Database · checked Sep 21, 2026
25	Connext	Partial evidence	Honolulu, United StatesHQ checked Sep 21, 2026	5,001-10,000	854 contacts →
	Partial evidence “Most outsourcing companies give you a vendor.” Source: RevenueBase Database · checked Sep 21, 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: outsourcing advisory 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 outsourcing advisory firms.
Partial evidence: Its own public description names part of outsourcing advisory firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsourcing advisory 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 39,835 outsourcing advisory firms worldwide

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Outsourcing advisory firms worldwide at a glance

As of Sep 21, 2026

22.0%Verified-email coverage

8.7Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

27,103

11-50

9,449

51-200

2,193

201-500

548

501-1,000

207

1,001-5,000

164

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 outsourcing advisory 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 outsourcing advisory firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “outsourcing advisory 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 outsourcing advisory 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 outsourcing advisory 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, 76,415 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 21, 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.

Outsourcing advisory firms by location

164 lists · largest first

Every Outsourcing advisory 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 outsourcing advisory 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 outsourcing advisory firms are there worldwide?

RevenueBase identified 39,835 outsourcing advisory 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?

Alvarez & Marsal, headquartered in New York, tops this list with the largest team on record.

Which country has the most outsourcing advisory firms?

The United States leads with 6,806 companies, followed by India (3,430) and Brazil (2,372). Every outsourcing advisory firms list by country and city is linked on this page.

Which city has the most outsourcing advisory firms?

London leads with 886 headquartered companies, followed by Sao Paulo (685) and Paris (501).

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 76,415 verified decision-maker contacts tracked across these 39,835 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 21, 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.