Company lists · Data refreshed September 2026

Top 25 Professional services outsourcing companies based in the United States

Name: Professional services outsourcing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 1,598 companies tracked

RevenueBase identified 1,598 professional services outsourcing companies headquartered in the United States as of September 2026 and tracks 50,736 professional contacts across them, including 9,022 with verified work emails. New York is the largest hub.

This list covers professional services outsourcing companies 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 29, 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 29, 2026 86% judged on-target in blind review

1,598Companies

50,736Contacts tracked

9,022Verified emails

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The 25 largest professional services outsourcing companies based in the United States

Ranked by team size

Top 25 of 1,598 professional services outsourcing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to professional services outsourcing companies: 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	Integreon	Indirect evidence	Austin, TX, United StatesHQ checked Sep 29, 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 29, 2026
2	VEE Technologies	Partial evidence	Decatur, GA, United StatesHQ checked Sep 29, 2026	5,001-10,000	2,933 contacts →
	Partial evidence “Vee Technologies is a global consulting and professional services organization delivering specialized, technology-enabled solutions.” Source: RevenueBase Database · checked Sep 29, 2026
3	Enshored	Indirect evidence	Signal Hill, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,247 contacts →
	Indirect evidence “Enshored powers the growth of ambitious high growth companies by delivering and managing teams of elite outsourcers.” Source: RevenueBase Database · checked Sep 29, 2026
4	Sikich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,688 contacts →
	Partial evidence “Sikich offers the public and private sectors a diverse platform of professional services across consulting, technology, and compliance.” Source: RevenueBase Database · checked Sep 29, 2026
5	SEBPO	Indirect evidence	Marlton, NJ, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,237 contacts →
	Indirect evidence “SEBPO transforms operational complexity into a seamless, strategic advantage.” Source: RevenueBase Database · checked Sep 29, 2026
6	Intelligroup	Partial evidence	Princeton, NJ, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,121 contacts →
	Partial evidence “Intelligroup is a global provider of innovative consulting, technology, and outsourcing services.” Source: RevenueBase Database · checked Sep 29, 2026
7	Cogneesol	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	501-1,000	870 contacts →
	Partial evidence “Cogneesol is a global professional services firm offering comprehensive bespoke and ready-to-deploy business process management solutions to help businesses optimize, innovate and…” Source: RevenueBase Database · checked Sep 29, 2026
8	Tenpath	Partial evidence	Oak Brook, IL, United StatesHQ checked Sep 29, 2026	n/a	676 contacts →
	Partial evidence “Headquartered in the United States, Tenpath Solutions is a multinational leader in outsourced IT Professional Services.” Source: RevenueBase Database · checked Sep 29, 2026
9	Not Available	Indirect evidence	Na, United StatesHQ checked Sep 29, 2026	n/a	658 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
10	Metriqe Solutions	Indirect evidence	Irving, TX, United StatesHQ checked Sep 29, 2026	201-500	571 contacts →
	Indirect evidence “Founded in 2007, Metriqe Solutions started out as a Hotel Accounting firm in USA.” Source: RevenueBase Database · checked Sep 29, 2026
11	Global Strategic Business Process Solutions	Partial evidence	Burlington, NC, United StatesHQ checked Sep 29, 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 29, 2026
12	Premier NX	Partial evidence	New Providence, NJ, United StatesHQ checked Sep 29, 2026	1,001-5,000	544 contacts →
	Partial evidence “Premier is a leading provider of tailored, knowledge process outsourcing solutions to enhance business outcomes for diverse industries, including financial services, healthcare…” Source: RevenueBase Database · checked Sep 29, 2026
13	Black Diamond Networks	Indirect evidence	Andover, MA, United StatesHQ checked Sep 29, 2026	51-200	481 contacts →
	Indirect evidence “Delivering Contingent Staffing, Specialized Consulting, and Managed Project Services (MSP, FSP, FSO) for Engineering, IT, and Lifescience enterprises.” Source: RevenueBase Database · checked Sep 29, 2026
14	Velan Info Services	Indirect evidence	Dover, DE, United StatesHQ checked Sep 29, 2026	201-500	447 contacts →
	Indirect evidence “Velan Info Services is a leading multidisciplinary service provider with its clients across the globe.” Source: RevenueBase Database · checked Sep 29, 2026
15	OKS Group	Indirect evidence	Bala Cynwyd, PA, United StatesHQ checked Sep 29, 2026	1,001-5,000	416 contacts →
	Indirect evidence “Founded in 1985, OKS Group provides customized BPO and LPO services to some of the world's largest and most demanding companies.” Source: RevenueBase Database · checked Sep 29, 2026
16	The Functionary	Indirect evidence	Aubrey, TX, United StatesHQ checked Sep 29, 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 29, 2026
17	Global Agility Solutions	Partial evidence	Austin, TX, United StatesHQ checked Sep 29, 2026	501-1,000	403 contacts →
	Partial evidence “Global Agility Solutions offers comprehensive onshore, offshore and hybrid Business Process Outsourcing (BPO) services and solutions focused on automating and advancing repeatable…” Source: RevenueBase Database · checked Sep 29, 2026
18	Outsource Partners International Alumni	Strong evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	397 contacts →
	Strong 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 29, 2026
19	Vertex Group	Indirect evidence	Olean, NY, United StatesHQ checked Sep 29, 2026	501-1,000	383 contacts →
	Indirect evidence “Vertex Global Services is one of the leading Business Optimization Solutions provider globally- Ranked 19th amongst 50 most innovative companies across the globe.” Source: RevenueBase Database · checked Sep 29, 2026
20	EDS Service Solutions	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 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 29, 2026
21	Eplanet Global	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 29, 2026	501-1,000	329 contacts →
	Indirect evidence “About Eplanet Global Since our inception in 2003, Eplanet Global has been a trailblazer in the tech-driven BPO industry.” Source: RevenueBase Database · checked Sep 29, 2026
22	Unison Globus	Strong evidence	Coral Springs, FL, United StatesHQ checked Sep 29, 2026	201-500	320 contacts →
	Strong evidence “Unison Globus is a global accounting outsourcing and offshore staffing partner dedicated to supporting CPA firms and accounting professionals.” Source: RevenueBase Database · checked Sep 29, 2026
23	Cognet	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 29, 2026	501-1,000	297 contacts →
	Indirect evidence “CogNet is a leading Business Process Management (BPM) company supporting our partners in the Human Resource Services industry.” Source: RevenueBase Database · checked Sep 29, 2026
24	World Connection	Indirect evidence	Boise, ID, United StatesHQ checked Sep 29, 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 29, 2026
25	Managed Labor Solutions	Indirect evidence	Allentown, PA, United StatesHQ checked Sep 29, 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 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: professional services outsourcing companies. 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 professional services outsourcing companies.
Partial evidence: Its own public description names part of professional services outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional services outsourcing companies. 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 1,598 professional services outsourcing companies based in the United States

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Professional services outsourcing companies based in the United States at a glance

As of Sep 29, 2026

17.8%Verified-email coverage

31.7Average contacts per company

11-50Median size (employees)

4.6%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

618

11-50

528

51-200

286

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,598 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 professional services outsourcing companies, 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 “professional services outsourcing companies”. 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 professional services outsourcing companies), 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 professional services outsourcing companies, 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, 9,022 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.

Professional services outsourcing companies 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 professional services outsourcing companies, 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 professional services outsourcing companies are there based in the United States?

RevenueBase identified 1,598 professional services outsourcing companies 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?

Integreon, headquartered in Austin, tops this list with the largest team on record.

Which city has the most professional services outsourcing companies?

New York leads with 73 headquartered companies, followed by Houston (40) and Miami (39).

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 9,022 verified decision-maker contacts tracked across these 1,598 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.

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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.