Company lists · Data refreshed September 2026

Top 25 Outsourcing advisory firms based in the United States

Name: Outsourcing advisory firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 6,806 companies tracked

RevenueBase identified 6,806 outsourcing advisory firms headquartered in the United States as of September 2026 and tracks 75,123 professional contacts across them, including 29,679 with verified work emails. New York is the largest hub.

This list covers outsourcing advisory firms headquartered in the United States, 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.

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

6,806Companies

75,123Contacts tracked

29,679Verified emails

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The 25 largest outsourcing advisory firms based in the United States

Ranked by team size

Top 25 of 6,806 outsourcing advisory firms based in the United States, 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	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
3	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
4	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
5	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
6	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
7	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
8	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
9	Clark Schaefer Hackett	Partial evidence	Dayton, OH, United StatesHQ checked Sep 21, 2026	501-1,000	683 contacts →
	Partial evidence “Clark Schaefer Hackett is more than an accounting and advisory firm; we’re striving to be your most valued advisor.” Source: RevenueBase Database · checked Sep 21, 2026
10	Not Available	Indirect evidence	Na, United StatesHQ checked Sep 21, 2026	n/a	658 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
11	Global Strategic Business Process Solutions	Partial evidence	Burlington, NC, United StatesHQ checked Sep 21, 2026	1,001-5,000	553 contacts →
	Partial evidence “Global Strategic is a business process outsourcing partner that builds high-performing teams through custom onshore, nearshore, and offshore solutions.” Source: RevenueBase Database · checked Sep 21, 2026
12	Pride Global	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	448 contacts →
	Partial evidence “Pride Global is a minority-owned integrated human capital solutions & advisory firm headquartered in New York with operating companies throughout the United States, United…” Source: RevenueBase Database · checked Sep 21, 2026
13	Valueonshore 'vos' Advisors	Partial evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	501-1,000	429 contacts →
	Partial evidence “Valueonshore (‘VOS’) Advisors is a global business advisory services firm of Big 4 alumni and industry executives.” Source: RevenueBase Database · checked Sep 21, 2026
14	The Functionary	Indirect evidence	Aubrey, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	415 contacts →
	Indirect evidence “The Functionary helps companies scale operations around the reality of their business, not a standard model.” Source: RevenueBase Database · checked Sep 21, 2026
15	Outsource Partners International Alumni	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	397 contacts →
	Partial evidence “Outsource Partners International (OPI) is a professional services firm dedicated to the outsourcing of finance, accounting, and analytics business processes.” Source: RevenueBase Database · checked Sep 21, 2026
16	CC Pace	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 21, 2026	51-200	390 contacts →
	Indirect evidence “CC Pace is a trusted partner with 40+ years of experience helping organizations achieve lasting success.” Source: RevenueBase Database · checked Sep 21, 2026
17	EDS Service Solutions	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	5,001-10,000	342 contacts →
	Partial evidence “EDS service solutions is the number one outsourcing solution for Fortune 500 companies throughout the US.” Source: RevenueBase Database · checked Sep 21, 2026
18	Sellside Group, LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	51-200	339 contacts →
	Indirect evidence “Selling a business is one of the most important financial decisions you'll ever make.” Source: RevenueBase Database · checked Sep 21, 2026
19	ATS	Indirect evidence	Cambridge, United StatesHQ checked Sep 21, 2026	n/a	313 contacts →
	Indirect evidence “ATS – 40 Years: Advancing Projects, Boosting Profits, and Cutting Costs For over 40 years, ATS has partnered with organizations worldwide to deliver outstanding results.” Source: RevenueBase Database · checked Sep 21, 2026
20	Montpac	Indirect evidence	Granite Bay, CA, United StatesHQ checked Sep 21, 2026	201-500	298 contacts →
	Indirect evidence “Montgomery Pacific Corporation (MontPac) is an outsourced accounting and financial management firm with personnel in the US, UK, and the Philippines.” Source: RevenueBase Database · checked Sep 21, 2026
21	World Connection	Indirect evidence	Boise, ID, United StatesHQ checked Sep 21, 2026	1,001-5,000	284 contacts →
	Indirect evidence “World Connection helps founder-led, private equity-backed, and growth-stage small to mid-market companies transform customer experience into measurable business outcomes.” Source: RevenueBase Database · checked Sep 21, 2026
22	Managed Labor Solutions	Indirect evidence	Allentown, PA, United StatesHQ checked Sep 21, 2026	1,001-5,000	275 contacts →
	Indirect evidence “Managed Labor Solutions (MLS) is a unique provider of outsourced labor to companies large and small.” Source: RevenueBase Database · checked Sep 21, 2026
23	NPI	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	51-200	267 contacts →
	Partial evidence “NPI is an IT procurement advisory services company that helps enterprises identify and eliminate overspending on IT purchases.” Source: RevenueBase Database · checked Sep 21, 2026
24	SAPRO	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	252 contacts →
	Strong evidence “SAPRO is a global, tech-enabled talent outsourcing firm specializing in Assurance, Tax, Advisory, and Client Accounting Services (CAS).” Source: RevenueBase Database · checked Sep 21, 2026
25	Bridgepoint Consulting	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	201-500	250 contacts →
	Indirect evidence “Bridgepoint Consulting, an Addison Group company, is a leading management consulting firm that offers a full suite of services and solutions to help companies navigate the…” 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 6,806 outsourcing advisory firms based in the United States

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Outsourcing advisory firms based in the United States at a glance

As of Sep 21, 2026

39.5%Verified-email coverage

11.0Average contacts per company

1-10Median size (employees)

7.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

4,930

11-50

1,369

51-200

365

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 6,806 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 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.
What qualifies: Companies headquartered in the United States 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. Companies headquartered outside United States 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, 29,679 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 metro

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 based in the United States?

RevenueBase identified 6,806 outsourcing advisory firms headquartered in the United States 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 city has the most outsourcing advisory firms?

New York leads with 479 headquartered companies, followed by Atlanta (171) and Chicago (163).

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 29,679 verified decision-maker contacts tracked across these 6,806 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.