Company lists · Data refreshed September 2026

Top 25 Staff augmentation companies based in the United States

Name: Staff augmentation 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 22, 2026 8,644 companies tracked

RevenueBase identified 8,644 staff augmentation companies headquartered in the United States as of September 2026 and tracks 393,264 professional contacts across them, including 53,042 with verified work emails. New York is the largest hub.

This list covers staff augmentation 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 22, 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 22, 2026 86% judged on-target in blind review

8,644Companies

393,264Contacts tracked

53,042Verified emails

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The 25 largest staff augmentation companies based in the United States

Ranked by team size

Top 25 of 8,644 staff augmentation companies based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to staff augmentation 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	KELLY	Indirect evidence	Troy, MI, United StatesHQ checked Sep 22, 2026	10001+	30,378 contacts →
	Indirect evidence “We’ve been helping organizations find the people they need longer than any other company in the world.” Source: RevenueBase Database · checked Sep 22, 2026
2	Manpower	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 22, 2026	10001+	22,508 contacts →
	Indirect evidence “Manpower is the global leader in contingent and permanent recruitment workforce solutions.” Source: RevenueBase Database · checked Sep 22, 2026
3	Express Employment International	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 22, 2026	10001+	12,647 contacts →
	Indirect evidence “Founded in 1983 and corporately headquartered in Oklahoma City, Express Employment International supports the Express Employment Professionals franchise and related brands.” Source: RevenueBase Database · checked Sep 22, 2026
4	Randstad USA	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	1,001-5,000	8,522 contacts →
	Indirect evidence “Randstad North America, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
5	Tradesmen International	Indirect evidence	Macedonia, OH, United StatesHQ checked Sep 22, 2026	10001+	4,999 contacts →
	Indirect evidence “Founded in 1992, Tradesmen International is North America’s premier resource for proven skilled craftsmen and labor consulting services.” Source: RevenueBase Database · checked Sep 22, 2026
6	Appleone Employment Services	Indirect evidence	Glendale, CA, United StatesHQ checked Sep 22, 2026	1,001-5,000	4,627 contacts →
	Indirect evidence “AppleOne Employment Services is a full-service employment company.” Source: RevenueBase Database · checked Sep 22, 2026
7	Spherion	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	10001+	4,263 contacts →
	Indirect evidence “We’re Spherion-a staffing and recruiting pioneer that’s been driving careers and helping businesses grow for over 75 years.” Source: RevenueBase Database · checked Sep 22, 2026
8	Select Staffing	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	10001+	3,934 contacts →
	Indirect evidence “Select Staffing is a leading provider of temporary staffing and employment services in the U.S, with nationwide operations across multiple contingent staffing sectors.” Source: RevenueBase Database · checked Sep 22, 2026
9	Artech L.L.C	Indirect evidence	Morristown, NJ, United StatesHQ checked Sep 22, 2026	5,001-10,000	3,674 contacts →
	Indirect evidence “Artech is the largest Women-Owned IT Staffing Firm in the U.S, with 34+ years of experience powering workforce transformation for Fortune 500 companies and public-sector…” Source: RevenueBase Database · checked Sep 22, 2026
10	Elwood Staffing Services, INC	Indirect evidence	Columbus, IN, United StatesHQ checked Sep 22, 2026	n/a	3,481 contacts →
	Indirect evidence “Whether you're looking to find your next great employee, make your next career move, or help a friend find a new job, you can trust that Elwood puts its passion and expertise into…” Source: RevenueBase Database · checked Sep 22, 2026
11	Beacon Hill	Indirect evidence	Boston, MA, United StatesHQ checked Sep 22, 2026	1,001-5,000	3,238 contacts →
	Indirect evidence “Beacon Hill was founded to set a new standard in search, career placement and flexible staffing.” Source: RevenueBase Database · checked Sep 22, 2026
12	Dexian	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 22, 2026	1,001-5,000	2,852 contacts →
	Indirect evidence “Dexian is a leading provider of staffing, IT, and workforce solutions with nearly employees and 70 locations worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
13	Staff Management SMX	Partial evidence	Chicago, IL, United StatesHQ checked Sep 22, 2026	501-1,000	2,680 contacts →
	Partial evidence “Founded in 1988, Staff Management is a recognized leader of comprehensive workforce solutions that deliver best talent, drive compliance, yield tangible savings and build…” Source: RevenueBase Database · checked Sep 22, 2026
14	Oxford Global Resources	Indirect evidence	Beverly, MA, United StatesHQ checked Sep 22, 2026	501-1,000	2,564 contacts →
	Indirect evidence “Oxford Global Resources delivers tailored solutions for any technical challenges you are facing using our partnership-first approach.” Source: RevenueBase Database · checked Sep 22, 2026
15	Trueblue INC	Indirect evidence	Tacoma, WA, United StatesHQ checked Sep 22, 2026	1,001-5,000	2,148 contacts →
	Indirect evidence “TrueBlue (NYSE: TBI) is a leading provider of specialized workforce solutions.” Source: RevenueBase Database · checked Sep 22, 2026
16	CSI Companies	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 22, 2026	n/a	2,120 contacts →
	Indirect evidence “Headquartered in Jacksonville, FL, CSI Companies partners with organizations nationwide to deliver solutions-focused workforce services.” Source: RevenueBase Database · checked Sep 22, 2026
17	Mindlance	Indirect evidence	Union, NJ, United StatesHQ checked Sep 22, 2026	1,001-5,000	2,096 contacts →
	Indirect evidence “Mindlance is a global Talent, Teams, Projects, and Workforce Solutions partner, serving leading enterprises across industries since With a strong footprint across multiple…” Source: RevenueBase Database · checked Sep 22, 2026
18	Rose International	Indirect evidence	Chesterfield, MO, United StatesHQ checked Sep 22, 2026	5,001-10,000	2,061 contacts →
	Indirect evidence “Rose International is a leading provider of Staffing and Total Talent Solutions to corporations and government agencies, employing thousands of people across the U.S, Canada and…” Source: RevenueBase Database · checked Sep 22, 2026
19	Remedy Intelligent Staffing	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	10001+	1,948 contacts →
	Indirect evidence “Remedy Intelligent Staffing is a nationwide professional staffing organization with more than 50 years of recruiting and selection expertise to match job candidates with positions…” Source: RevenueBase Database · checked Sep 22, 2026
20	Spectraforce	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,845 contacts →
	Indirect evidence “Founded in 2004, SPECTRAFORCE® is a global staffing and workforce solutions company that helps organizations build high-performing teams across healthcare, technology, financial…” Source: RevenueBase Database · checked Sep 22, 2026
21	Addison Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,840 contacts →
	Indirect evidence “Addison Group provides comprehensive talent solutions and consulting services across diverse practice areas, including Non-Clinical Healthcare, Information Technology (IT), Human…” Source: RevenueBase Database · checked Sep 22, 2026
22	Labormax Staffing	Indirect evidence	Kearney, MO, United StatesHQ checked Sep 22, 2026	n/a	1,755 contacts →
	Indirect evidence “LaborMAX Staffing is your reliable provider of quality pre-screened contingent workers.” Source: RevenueBase Database · checked Sep 22, 2026
23	MEDIX	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 22, 2026	501-1,000	1,753 contacts →
	Indirect evidence “Medix provides workforce solutions to clients and creates opportunity for talent in the Healthcare, Life Sciences, Engineering and Technology fields.” Source: RevenueBase Database · checked Sep 22, 2026
24	Prolink	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 22, 2026	501-1,000	1,751 contacts →
	Indirect evidence “We are here to solve your existing problems and prevent new ones.” Source: RevenueBase Database · checked Sep 22, 2026
25	Elite Staffing INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 22, 2026	10001+	1,661 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 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: staff augmentation 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 staff augmentation companies.
Partial evidence: Its own public description names part of staff augmentation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name staff augmentation 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 8,644 staff augmentation companies based in the United States

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Staff augmentation companies based in the United States at a glance

As of Sep 22, 2026

13.5%Verified-email coverage

45.5Average contacts per company

11-50Median size (employees)

3.2%Largest-city concentration · New York

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

2,927

11-50

2,685

51-200

1,835

201-500

620

501-1,000

271

1,001-5,000

212

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 8,644 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 staff augmentation 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 “staff augmentation 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 staff augmentation 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 staff augmentation 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, 53,042 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 22, 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.

Staff augmentation 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 staff augmentation 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 staff augmentation companies are there based in the United States?

RevenueBase identified 8,644 staff augmentation 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?

KELLY, headquartered in Troy, tops this list with the largest team on record.

Which city has the most staff augmentation companies?

New York leads with 274 headquartered companies, followed by Houston (265) and Dallas (161).

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 53,042 verified decision-maker contacts tracked across these 8,644 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 22, 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.