Company lists · Data refreshed September 2026

Top 25 Quality assurance staffing firms based in the United States

Name: Quality assurance staffing 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 29, 2026 5,913 companies tracked

RevenueBase identified 5,913 quality assurance staffing firms headquartered in the United States as of September 2026 and tracks 188,631 professional contacts across them, including 28,346 with verified work emails. New York is the largest hub.

This list covers quality assurance staffing 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 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

5,913Companies

188,631Contacts tracked

28,346Verified emails

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The 25 largest quality assurance staffing firms based in the United States

Ranked by team size

Top 25 of 5,913 quality assurance staffing firms 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 quality assurance staffing 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	Spherion	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	10001+	4,263 contacts →
	Partial 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 29, 2026
2	Select Staffing	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	10001+	3,934 contacts →
	Partial 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 29, 2026
3	Rose International	Partial evidence	Chesterfield, MO, United StatesHQ checked Sep 29, 2026	5,001-10,000	2,061 contacts →
	Partial 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 29, 2026
4	Remedy Intelligent Staffing	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	10001+	1,948 contacts →
	Partial 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 29, 2026
5	Addison Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 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 29, 2026
6	Labormax Staffing	Strong evidence	Kearney, MO, United StatesHQ checked Sep 29, 2026	n/a	1,755 contacts →
	Strong evidence “LaborMAX Staffing is your reliable provider of quality pre-screened contingent workers.” Source: RevenueBase Database · checked Sep 29, 2026
7	MEDIX	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 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 29, 2026
8	Pridestaff	Indirect evidence	Fresno, CA, United StatesHQ checked Sep 29, 2026	501-1,000	1,683 contacts →
	Indirect evidence “We make it all about you.” Source: RevenueBase Database · checked Sep 29, 2026
9	Elite Staffing INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	10001+	1,661 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
10	Resourcemfg	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	5,001-10,000	1,639 contacts →
	Partial evidence “ResourceMFG places temporary and direct hire employees within the total spectrum of manufacturing jobs including production, quality, maintenance, supervision, and all levels of…” Source: RevenueBase Database · checked Sep 29, 2026
11	Nesco Resource	Indirect evidence	Mayfield Heights, OH, United StatesHQ checked Sep 29, 2026	501-1,000	1,599 contacts →
	Indirect evidence “Companies need talent.” Source: RevenueBase Database · checked Sep 29, 2026
12	Infotree Global Solutions	Indirect evidence	Plymouth, MI, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,545 contacts →
	Indirect evidence “Infotree Global was founded in 2002 in a small office in Canton, MI, Infotree Global had a clear mission; To bring the world’s best talent together with the greatest companies…” Source: RevenueBase Database · checked Sep 29, 2026
13	Coworx Staffing Services	Partial evidence	Morristown, NJ, United StatesHQ checked Sep 29, 2026	201-500	1,286 contacts →
	Partial evidence “CoWorx Staffing Services is one of the largest staffing firms in the U.S.” Source: RevenueBase Database · checked Sep 29, 2026
14	Ultimate Staffing	Partial evidence	Orange, CA, United StatesHQ checked Sep 29, 2026	501-1,000	1,196 contacts →
	Partial evidence “Meet Ultimate Staffing: Ultimate Staffing Services, a business line of Roth Staffing Companies, specializes in delivering temporary, temporary-to-hire, and direct hire services…” Source: RevenueBase Database · checked Sep 29, 2026
15	TRS Staffing Solutions	Partial evidence	Greenville, United StatesHQ checked Sep 29, 2026	201-500	1,187 contacts →
	Partial evidence “TRS Staffing Solutions is a world leading engineering recruitment agency specialising in the recruitment and supply of professional, engineering, technical and field talent.” Source: RevenueBase Database · checked Sep 29, 2026
16	locumtenens.com	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 29, 2026	501-1,000	1,171 contacts →
	Partial evidence “LocumTenens.com specializes in optimizing healthcare staffing operations.” Source: RevenueBase Database · checked Sep 29, 2026
17	Totalmed	Partial evidence	Appleton, WI, United StatesHQ checked Sep 29, 2026	201-500	1,170 contacts →
	Partial evidence “TotalMed provides temporary, contract, and full time staffing services to hospitals, medical groups, health plans, and life sciences companies who require staffing assistance in…” Source: RevenueBase Database · checked Sep 29, 2026
18	Planet Pharma	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Founded in 2012, Planet Pharma is a global leader in life sciences recruitment and staffing, specializing in Pharmaceuticals, Biotechnology, Medical Device, Labs & Healthcare…” Source: RevenueBase Database · checked Sep 29, 2026
19	QPS Employment Group	Partial evidence	Brookfield, WI, United StatesHQ checked Sep 29, 2026	201-500	1,019 contacts →
	Partial evidence “Founded in 1985, QPS Employment Group has grown from a two-person operation to one of the nation's leading staffing and recruiting firms, with more than 300 internal employees…” Source: RevenueBase Database · checked Sep 29, 2026
20	Lyneer Staffing Solutions	Partial evidence	Ewing, NJ, United StatesHQ checked Sep 29, 2026	201-500	1,012 contacts →
	Partial evidence “The Solution to Your Staffing Needs Lyneer Staffing Solutions is a national workforce solutions company with over 25 years of experience in the staffing industry.” Source: RevenueBase Database · checked Sep 29, 2026
21	A1qa	Partial evidence	Decatur, GA, United StatesHQ checked Sep 29, 2026	1,001-5,000	980 contacts →
	Partial evidence “a1qa is a global software testing and QA outsourcing company trusted by IT firms and Fortune 500 enterprises to deliver software quality that holds under real-world pressure.” Source: RevenueBase Database · checked Sep 29, 2026
22	Career Strategies	Partial evidence	Round Rock, TX, United StatesHQ checked Sep 29, 2026	n/a	955 contacts →
	Partial evidence “Career Strategies is a full service staffing firm specializing in Property Management, Healthcare and Professional Services recruitment.” Source: RevenueBase Database · checked Sep 29, 2026
23	Remx The Workforce Experts	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	1,001-5,000	901 contacts →
	Partial evidence “RemX is the professional staffing division of EmployBridge, a $3 billion staffing organization with more than 600 offices in the U.S.” Source: RevenueBase Database · checked Sep 29, 2026
24	Imcs Group	Partial evidence	Irving, TX, United StatesHQ checked Sep 29, 2026	201-500	881 contacts →
	Partial evidence “IMCS Group is an IT, Healthcare, and Professional Staffing Company that helps Enterprises optimize the business value of their Staffing investments and enables them to achieve…” Source: RevenueBase Database · checked Sep 29, 2026
25	Medpro Healthcare Staffing	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 29, 2026	501-1,000	855 contacts →
	Partial evidence “MedPro Healthcare Staffing is a Joint Commission certified, leading provider of temporary and contract staffing services to healthcare facilities throughout the United States.” 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: quality assurance staffing 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 quality assurance staffing firms.
Partial evidence: Its own public description names part of quality assurance staffing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name quality assurance staffing 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 5,913 quality assurance staffing firms based in the United States

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Quality assurance staffing firms based in the United States at a glance

As of Sep 29, 2026

15.0%Verified-email coverage

31.9Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

2,098

11-50

1,763

51-200

1,211

201-500

463

501-1,000

190

1,001-5,000

136

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 5,913 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 quality assurance staffing 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 “quality assurance staffing 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 quality assurance staffing 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 quality assurance staffing 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, 28,346 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.

Quality assurance staffing 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 quality assurance staffing 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 quality assurance staffing firms are there based in the United States?

RevenueBase identified 5,913 quality assurance staffing 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?

Spherion, headquartered in Atlanta, tops this list with the largest team on record.

Which city has the most quality assurance staffing firms?

New York leads with 170 headquartered companies, followed by Houston (169) and Atlanta (117).

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 28,346 verified decision-maker contacts tracked across these 5,913 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.