Company lists · Data refreshed September 2026

Top 25 Outsourced professional services based in the United States

Name: Outsourced professional services 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 725 companies tracked

RevenueBase identified 725 outsourced professional services headquartered in the United States as of September 2026 and tracks 21,648 professional contacts across them, including 3,008 with verified work emails. New York is the largest hub.

This list covers outsourced professional services 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

725Companies

21,648Contacts tracked

3,008Verified emails

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The 25 largest outsourced professional services based in the United States

Ranked by team size

Top 25 of 725 outsourced professional services 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 outsourced professional services: 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	Enshored	Partial evidence	Signal Hill, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,247 contacts →
	Partial evidence “Enshored powers the growth of ambitious high growth companies by delivering and managing teams of elite outsourcers.” Source: RevenueBase Database · checked Sep 21, 2026
2	Tenpath	Strong evidence	Oak Brook, IL, United StatesHQ checked Sep 21, 2026	n/a	676 contacts →
	Strong evidence “Headquartered in the United States, Tenpath Solutions is a multinational leader in outsourced IT Professional Services.” Source: RevenueBase Database · checked Sep 21, 2026
3	Not Available	Indirect evidence	Na, United StatesHQ checked Sep 21, 2026	n/a	658 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
4	Premier NX	Partial evidence	New Providence, NJ, United StatesHQ checked Sep 21, 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 21, 2026
5	Velan Info Services	Indirect evidence	Dover, DE, United StatesHQ checked Sep 21, 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 21, 2026
6	Global Agility Solutions	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 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 21, 2026
7	Outsource Partners International Alumni	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
8	Unison Globus	Strong evidence	Coral Springs, FL, United StatesHQ checked Sep 21, 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 21, 2026
9	Questco Companies	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 21, 2026	51-200	279 contacts →
	Partial evidence “Outsourcing HR through a PEO is a strong option for growing businesses.” Source: RevenueBase Database · checked Sep 21, 2026
10	Managed Labor Solutions	Partial evidence	Allentown, PA, United StatesHQ checked Sep 21, 2026	1,001-5,000	275 contacts →
	Partial evidence “Managed Labor Solutions (MLS) is a unique provider of outsourced labor to companies large and small.” Source: RevenueBase Database · checked Sep 21, 2026
11	Staffvirtual	Partial evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	501-1,000	245 contacts →
	Partial evidence “STAFFVIRTUAL is an American business process outsourcing (BPO) company with offices in the Philippines specializing in customer support, back office, and IT outsourcing.” Source: RevenueBase Database · checked Sep 21, 2026
12	Nextsource	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	1,001-5,000	231 contacts →
	Indirect evidence “It’s important to know who you’re partnering with.” Source: RevenueBase Database · checked Sep 21, 2026
13	Moksh Tech	Strong evidence	Lake Hiawatha, NJ, United StatesHQ checked Sep 21, 2026	201-500	187 contacts →
	Strong evidence “We are a leading global outsourcing services company with highly skilled professionals working for our clients and partners.” Source: RevenueBase Database · checked Sep 21, 2026
14	Glocal RPO	Partial evidence	Wilmington De, DE, United StatesHQ checked Sep 21, 2026	501-1,000	167 contacts →
	Partial evidence “Glocal RPO is a leading Recruitment Process Outsourcing partner providing plug-and-play virtual sourcers and recruiters to staffing organizations across the US, Canada, UAE and UK…” Source: RevenueBase Database · checked Sep 21, 2026
15	Serverplus	Partial evidence	Orem, UT, United StatesHQ checked Sep 21, 2026	51-200	161 contacts →
	Partial evidence “Whether you need outsourced support for your ISP or for your business, after hours support, BPO services or just a virtual assistant to help you answer phones and get through the…” Source: RevenueBase Database · checked Sep 21, 2026
16	Maitri Services	Partial evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	51-200	158 contacts →
	Partial evidence “Maitri is a professional services company catering to startups and small to mid-market businesses.” Source: RevenueBase Database · checked Sep 21, 2026
17	Arch Resources Group	Indirect evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	501-1,000	141 contacts →
	Indirect evidence “ARCH Resources Group LLC With our expansion into Peru and Central America, we now have an international presence, operating through our branch and virtual offices throughout the…” Source: RevenueBase Database · checked Sep 21, 2026
18	Global Virtuoso	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	51-200	133 contacts →
	Partial evidence “Global Virtuoso is a multi-disciplined outsourcing company that specializes in business services for aviation, healthcare & medical, and finance and accounting.” Source: RevenueBase Database · checked Sep 21, 2026
19	Pacific Coast Companies INC	Indirect evidence	Rancho Cordova, CA, United StatesHQ checked Sep 21, 2026	51-200	130 contacts →
	Indirect evidence “Pacific Coast Companies, Inc.” Source: RevenueBase Database · checked Sep 21, 2026
20	Agile Soft Systems INC	Partial evidence	Fremont, CA, United StatesHQ checked Sep 21, 2026	51-200	128 contacts →
	Partial evidence “Agile Soft Systems is a professional IT Services company based in Silicon Valley (Fremont, CA) with off-shore development centers in India.” Source: RevenueBase Database · checked Sep 21, 2026
21	Peoplease	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 21, 2026	201-500	113 contacts →
	Indirect evidence “Simplify Your Success \| We're Peoplease.Nice to Meet You!” Source: RevenueBase Database · checked Sep 21, 2026
22	HCA Consulting Group	Partial evidence	Milwaukee Wi, WI, United StatesHQ checked Sep 21, 2026	51-200	105 contacts →
	Partial evidence “At HCA Consulting Group, we empower businesses worldwide through seamless offshoring and outsourcing solutions that drive efficiency, unlock growth, and put people first.” Source: RevenueBase Database · checked Sep 21, 2026
23	TDS Global Solutions	Indirect evidence	Broadview Heights, OH, United StatesHQ checked Sep 21, 2026	51-200	96 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
24	Capactix Business Solutions	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	92 contacts →
	Indirect evidence “We are one of the leading offshore companies that offer the best in the industry staffing solutions to CPAs, accounting firms, and other companies.” Source: RevenueBase Database · checked Sep 21, 2026
25	Sayva Solutions	Strong evidence	San Diego, CA, United StatesHQ checked Sep 21, 2026	51-200	91 contacts →
	Strong evidence “Sayva Solutions is a professional services firm providing tailored solutions for businesses through project-based consulting, recruiting, and outsourced back-office functions.” 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: outsourced professional services. 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 outsourced professional services.
Partial evidence: Its own public description names part of outsourced professional services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsourced professional services. 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 725 outsourced professional services based in the United States

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Outsourced professional services based in the United States at a glance

As of Sep 21, 2026

13.9%Verified-email coverage

29.9Average contacts per company

11-50Median size (employees)

4.3%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

296

11-50

221

51-200

131

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 725 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 outsourced professional services, 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 “outsourced professional services”. 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 outsourced professional services), 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 outsourced professional services, 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, 3,008 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.

Outsourced professional services by metro

Outsourced professional services in New York31

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 outsourced professional services, 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 outsourced professional services are there based in the United States?

RevenueBase identified 725 outsourced professional services 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?

Enshored, headquartered in Signal Hill, tops this list with the largest team on record.

Which city has the most outsourced professional services?

New York leads with 31 headquartered companies, followed by Dallas (18) and Houston (18).

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 3,008 verified decision-maker contacts tracked across these 725 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.