Note (September 2026): Earlier versions of this list included FirstGroup America, a transportation company rather than a staffing firm, and gave wrong founders, founding years and revenue figures for several companies; these are corrected below.
The largest staffing companies operating in the USA include ManpowerGroup, Robert Half, Kelly Services, TrueBlue and Kforce, which are US-headquartered, plus Randstad and The Adecco Group, which are European. Among US-headquartered listed firms, ManpowerGroup reported the highest revenue, $17.96 billion in 2025. Allegis Group, a large private US staffing firm, is not included in that comparison because its latest public revenue figure dates from 2018.
Key Takeaways
- Randstad (€24.1 billion revenue in 2024) and The Adecco Group (€23.1 billion in 2025) are the two largest staffing firms in the world, and both are headquartered in Europe.
- ManpowerGroup, based in Milwaukee, is the largest US-headquartered listed staffing company by revenue, at $17.96 billion in 2025.
- Spherion has been part of Randstad since 2011, and FirstGroup America was a transportation company, not a staffing firm.
- Revenue at most listed US staffing firms has fallen since its 2022 peak: Robert Half went from $7.24 billion to $5.38 billion by 2025.
- Nearly 2.2 million temporary and contract employees worked for US staffing companies in an average week in 2024, according to the American Staffing Association.
With their wide range of services, staffing firms are becoming standard and changing employment practices. By collaborating with a staffing agency, you can hire a qualified pool of applicants with the least amount of work. Staffing firms pair employers with qualified job candidates.
Staffing Companies In USA – List of Top Staffing Companies In USA
This guide profiles the best-known staffing companies operating in the USA, for employers and job seekers comparing American staffing firms. Nine of the ten entries are staffing businesses. The tenth, FirstGroup America, is a transportation company, and its section has been corrected rather than removed. Randstad and The Adecco Group are headquartered in Europe, while the other staffing firms listed are US-based.
Because it provides a qualified pool of applicants and a wealth of chances while meeting the demands of the business sector, the staffing industry is crucial for the expansion of the American economy. Here is the list, with each company’s headquarters, ownership and latest reported revenue checked as of September 2026.
Randstad
Randstad, headquartered in Diemen, Netherlands, and founded in 1960 by Frits Goldschmeding and Gerrit Daleboudt, has a significant worldwide footprint, with 4,861 branches in 39 countries according to Wikipedia. Randstad reported revenue of €24.1 billion for 2024 and owns the US staffing brand Spherion (acquired in 2011) and the job site Monster (acquired in 2016). By 2019, the business had placed 649,000 people across a wide range of industries, including HR, manufacturing, accountancy, IT, engineering, and many more, by drawing on its nearly 60 years of experience. Of these, 260,700 were long-term assignments.
Randstad’s operations in the United States and Canada are a major part of its business; the office counts of 537 (US) and 51 (Canada) reported when this article was first published could not be re-verified in September 2026, and branch numbers change often. For their staffing requirements, businesses of all sizes rely on Randstad’s database of millions of candidates. The team oversees a workforce of more than 100,000 people in these areas each week.
Express Employment Professionals
One of the top staffing companies in the US is Express Employment Professionals. Express Employment Professionals was co-founded in Oklahoma City in 1983 by Robert A. Funk, Bill Stoller and Jim Gray and grew into one of the largest staffing franchisors in the United States. Express offers a wide range of employment possibilities, from entry-level to professional roles, through its franchise offices; a current location count could not be verified from the company’s website in September 2026.
Additionally, they provide a range of staffing services, such as direct hire placement and temporary and contract staffing. Express Employment Professionals has grown outside of the US, operating in Australia, Canada, and New Zealand. Express Employment Professionals is privately held, so it does not publish audited revenue the way listed staffing companies do.
Express Employment Professionals is well-positioned to expand in the upcoming years, thanks to a strong dedication to customer service and a focus on finding the ideal fit for both employers and employees.
Manpower Group
One of the top staffing firms in the US is ManpowerGroup. ManpowerGroup, which was established in 1948, has more than 70 years of experience in placing individuals in positions. ManpowerGroup, founded in Milwaukee, Wisconsin, by Elmer Winter and Aaron Scheinfeld, is still headquartered there and reported about 2,700 offices in 80 countries and territories in 2017, according to Wikipedia. Its main brands are Manpower, Experis and Right Management. ManpowerGroup reported revenue of $18.0 billion in 2020 (not $23.6 billion, as earlier versions of this article said) and $17.96 billion in 2025, and had about 30,000 full-time staff in 2021.
ManpowerGroup provides a comprehensive range of recruiting and staffing services to assist companies in filling open positions. These services include executive search, outplacement, temporary and contract staffing, permanent placement, and training & development. ManpowerGroup additionally offers consultancy and workforce planning services to assist firms in making future plans. ManpowerGroup can provide a wide range of services thanks to its knowledgeable staff.
Kelly Services
Kelly Services, a pioneer in employment and recruiting, was founded in 1946 by William Russell Kelly as Russell Kelly Office Service and is headquartered in Troy, Michigan. Their knowledge spans a variety of sectors, including manufacturing, banking, healthcare, and information technology. Kelly Services also provides payroll services, human resource consulting, and other HR-related services in addition to temporary and contract staffing solutions.
Kelly Services is one of the biggest employment firms in the US, with revenue of $4.25 billion in fiscal 2025, down from $4.97 billion in fiscal 2022. In May 2024, Kelly Services acquired Motion Recruitment Partners for $425 million in cash, expanding its technology staffing business. Kelly Services remains one of the larger US-headquartered staffing companies by revenue.
Robert Half International
Robert Half, one of the biggest staffing firms in the US, was founded in New York City in March 1948 by Bob and Maxine Half. The company formerly traded as Robert Half International Inc. and now operates as Robert Half Inc., headquartered in Menlo Park, California. The business offers a comprehensive array of hiring and staffing services, including executive search, temporary and contract employment, permanent placement, and consultancy. Other services provided by Robert Half International include background checks, drug tests, and HR outsourcing. Robert Half reported 315 Robert Half locations and 89 locations for Protiviti, its consulting subsidiary founded in 2002, and about 14,700 employees in December 2024.
Robert Half’s revenue in 2020 was $5.11 billion (not $5.4 billion, as earlier versions of this article said). Revenue rose to a peak of $7.24 billion in 2022, then declined to $6.39 billion in 2023, $5.80 billion in 2024 and $5.38 billion in 2025. Across the whole US industry, the American Staffing Association reports that nearly 2.2 million temporary and contract employees worked for staffing companies in an average week in 2024.
Spherion
One of the staffing firms in the US is called Spherion Corporation. Leroy Dettman and Joseph Perfetto founded it in Chicago in 1946 as City Car Unloaders; it later became Personnel Pool of America and then Interim Services before taking the Spherion name in 2000 (earlier versions of this article named the wrong founders). Spherion is headquartered in Atlanta, Georgia, and has been owned by the Dutch group Randstad since 2011, so it is no longer an independent company. Spherion operates offices across the United States; a current office count could not be verified in September 2026.
The business offers specialization in hiring, staffing, and human resources. Additionally, it provides services including benefits administration and payroll processing. Because Spherion is part of Randstad, it does not publish separate revenue, and the $1.6 billion 2020 revenue figure given in earlier versions of this article could not be verified. The 3.5% annual growth forecast for 2021 to 2025 that appeared here also could not be traced to any Randstad or Spherion publication. For current figures, Randstad’s group results are the reliable source. Spherion continues to operate as a Randstad staffing brand in North America.
TrueBlue
In the US, TrueBlue is a top supplier of employment and recruiting solutions. TrueBlue was founded in 1985 and operated as Labor Ready, Inc. until it changed its name to TrueBlue, Inc. in December 2007 (earlier versions of this article gave 1995). TrueBlue is headquartered in Tacoma, Washington, and its brands include PeopleReady, PeopleScout, Staff Management | SMX, Centerline, SIMOS and Healthcare Staffing Professionals.
A broad variety of staffing and recruiting services, such as contingent industrial staffing, recruitment process outsourcing and managed service provider solutions, are provided by TrueBlue, which reported revenue of $1.62 billion in fiscal 2025, not the $3 billion stated in earlier versions of this article. TrueBlue’s revenue fell from $2.25 billion in fiscal 2022 to $1.57 billion in fiscal 2024 before edging up in fiscal 2025, and the company says it has connected more than 10 million people with work.
The Adecco Group
The Adecco Group was formed on 1 January 1997 by the merger of the French company Ecco and the Swiss company Adia Interim. Its headquarters are in Zurich, Switzerland, and it employs about 34,000 full-time equivalent staff (2025) across 5,200 branches in more than 60 countries and territories. The Adecco Group is described by Wikipedia as the world’s second-largest HR and temporary staffing company, behind Randstad, and operates in the US through brands including Adecco, LHH and Akkodis. It reported revenue of €23.1 billion in 2025.
The business provides a wide range of staffing and recruiting services, including executive search, outplacement, temporary staffing, and permanent placement. The Adecco Group also offers a wide range of additional services, including HR advice, training, and development. The Adecco Group remains one of the two largest staffing firms in the world by revenue.
FirstGroup America
FirstGroup America is not a staffing company. It was the North American arm of FirstGroup, a British transport group headquartered in Aberdeen, Scotland, that runs bus, coach and rail services. FirstGroup built its US business by buying Ryder Public Transport Services in 1999 and later Laidlaw, which gave it control of Greyhound Lines alongside its school-bus (First Student) and contracted-transit (First Transit) operations. In April 2021, FirstGroup agreed to sell First Student and First Transit to the investment firm EQT, and the sale completed later in 2021.
The staffing network, headcount and founding year attributed to FirstGroup America in earlier versions of this article could not be verified and do not match the company’s actual business. FirstGroup now concentrates on its UK and Ireland transport operations after selling its North American businesses. Employers looking for a staffing partner should consider the staffing firms in this list, or the additional firms covered below, instead.
Kforce
Staffing firm Kforce was established in 1962. Tampa, Florida serves as the company’s headquarters, and it has more than 40 offices nationwide. Kforce describes itself as a professional staffing firm that focuses on two areas, Technology and Finance and Accounting, and says about 17,000 of its consultants and experts work with clients each year. The business also provides training and HR consulting services.
Kforce reported $1.40 billion in revenue in 2020; revenue then rose to $1.71 billion in 2022 before falling to $1.33 billion in 2025. The forecast in earlier versions of this article, of $1.7 billion in revenue by 2025, therefore did not materialize. Kforce remains one of the larger publicly listed professional staffing firms headquartered in the US.
How Do the Top Staffing Companies in the USA Compare?
The table below compares the companies in this list by headquarters, founding year and latest reported revenue. Revenue figures come from company filings as summarized by Wikipedia and Stock Analysis, checked in September 2026. Randstad and Adecco report in euros.
| Company | Headquarters | Founded | Latest revenue | Status |
|---|---|---|---|---|
| Randstad | Diemen, Netherlands | 1960 | €24.1 billion (2024) | Independent; owns Spherion and Monster |
| The Adecco Group | Zurich, Switzerland | 1997 (merger) | €23.1 billion (2025) | Independent; brands include Adecco, LHH, Akkodis |
| ManpowerGroup | Milwaukee, Wisconsin | 1948 | $17.96 billion (2025) | Independent, NYSE-listed |
| Robert Half | Menlo Park, California | 1948 | $5.38 billion (2025) | Independent; owns Protiviti |
| Kelly Services | Troy, Michigan | 1946 | $4.25 billion (2025) | Independent; bought Motion Recruitment in 2024 |
| TrueBlue | Tacoma, Washington | 1985 | $1.62 billion (2025) | Independent; formerly Labor Ready |
| Kforce | Tampa, Florida | 1962 | $1.33 billion (2025) | Independent |
| Express Employment Professionals | Oklahoma City, Oklahoma | 1983 | Private; not published | Independent franchisor |
| Spherion | Atlanta, Georgia | 1946 | Reported within Randstad | Owned by Randstad since 2011 |
| FirstGroup America | Parent in Aberdeen, Scotland | Not applicable | Not applicable | Transport business, not staffing; sold in 2021 |
Which Staffing Companies Are Headquartered in the USA?
Seven of the staffing businesses in this list are headquartered in the United States: ManpowerGroup, Robert Half, Kelly Services, TrueBlue, Kforce, Express Employment Professionals and Spherion. Spherion, however, is owned by the Dutch company Randstad.
Randstad and The Adecco Group are European companies with large US operations. Readers who specifically want an American-owned, independent staffing firm should look at the five US-listed companies or at Express Employment Professionals, which is privately held.
Other Large US Staffing Firms Worth Knowing
Several large staffing companies were missing from the original list. Two that are well documented are described below.
Allegis Group
Allegis Group is a private staffing company headquartered in Hanover, Maryland, founded in 1983 by Jim C. Davis and Steve Bisciotti. Its brands include Aerotek, TEKsystems and Actalent. Because Allegis Group is private, the most recent revenue figure listed on Wikipedia is $13.4 billion for 2018, with 19,000 employees that year.
AMN Healthcare
AMN Healthcare Services is a healthcare staffing company headquartered in Dallas, Texas, and founded in 1985. AMN Healthcare places travel nurses, physicians and allied health professionals with hospitals and other facilities. Its revenue fell from $5.24 billion in 2022 to $2.73 billion in 2025.
What Does a Staffing Company Do?
A staffing company finds and retains workers and sends them to client companies that need extra help. The client contracts with the staffing agency, and the agency places workers on assignments, which is the core model Wikipedia describes for temporary work agencies.
- Temporary and contract staffing: workers are employed by the agency and assigned to a client for a set period.
- Temp-to-hire: a worker starts on a temporary assignment that can convert into a permanent job with the client.
- Direct hire or permanent placement: the agency recruits a candidate who joins the client’s own payroll.
- Recruitment process outsourcing (RPO): the provider runs all or part of a client’s hiring, a service TrueBlue offers through its PeopleSolutions segment.
- Managed service provider (MSP): the provider manages a client’s contingent workforce program, often across several agencies.
For a closer look at how agencies add value, see how recruitment agencies drive productivity and results, and for technology hiring specifically, the benefits of IT recruitment outsourcing.
US Staffing Industry by the Numbers
The American Staffing Association (ASA), the US industry body, publishes the most widely cited figures on the sector:
- Nearly 2.2 million temporary and contract employees worked for US staffing companies in an average week in 2024.
- During 2023, US staffing companies hired 12.7 million temporary and contract employees.
- In 2021, there were around 27,000 staffing and recruiting companies in the US, operating close to 54,000 offices.
- The staffing industry employs only about 2% of the US nonfarm workforce, according to the ASA.
How Has Staffing Company Revenue Changed Recently?
Revenue at the listed US staffing companies peaked around 2022 and has declined since. Robert Half fell from $7.24 billion (2022) to $5.38 billion (2025), Kforce from $1.71 billion to $1.33 billion, TrueBlue from $2.25 billion to $1.62 billion, and ManpowerGroup from $19.83 billion to $17.96 billion over the same period.
The largest swing was in healthcare staffing, where AMN Healthcare’s revenue roughly halved between 2022 and 2025. The figures show that projections of steady growth made in earlier versions of this article, such as fixed annual growth rates through 2025, did not hold.
How to Choose a Staffing Company
- Match the specialism. Kforce focuses on technology and finance roles, TrueBlue’s PeopleReady on general, industrial and skilled-trade work, and AMN Healthcare on clinical staff.
- Decide on the engagement type. Choose between temporary, temp-to-hire, direct hire, RPO or MSP before you request quotes.
- Check local coverage. Branch networks change often, so confirm that the agency has recruiters in your area or for remote roles.
- Ask about screening. Confirm how the agency handles background checks and compliance; our guide to background checks for temporary workers explains the risks.
- Plan the first weeks. Temporary staff need the same structured start as employees; see our guide to employee onboarding.
Job seekers can register with several agencies at once. A focused resume helps, so read how to make a recruiter seriously consider your resume before applying. Businesses that need technology partners rather than staff may also compare the top IT services companies in the USA.
Frequently Asked Questions
What is the largest staffing company in the USA?
ManpowerGroup is the largest US-headquartered listed staffing company by revenue, reporting $17.96 billion in 2025. Worldwide, Randstad of the Netherlands and The Adecco Group of Switzerland are larger, and both have big US operations. Allegis Group is a large private US firm whose most recent public revenue figure, $13.4 billion, dates from 2018.
Is Robert Half International the same company as Robert Half?
Yes. Robert Half International Inc. now operates as Robert Half Inc., headquartered in Menlo Park, California. Robert Half was founded in 1948 and also owns the consulting firm Protiviti.
Is Spherion still an independent company?
No. Spherion was acquired by the Dutch staffing group Randstad in 2011 and now operates as a Randstad brand in North America, headquartered in Atlanta, Georgia.
Is FirstGroup America a staffing company?
No. FirstGroup America was the North American transport arm of FirstGroup, a British bus and rail operator. FirstGroup sold First Student and First Transit to EQT in 2021, and the company does not provide staffing services.
How many people work through US staffing agencies?
Nearly 2.2 million temporary and contract employees worked for US staffing companies in an average week in 2024, according to the American Staffing Association. Over the course of 2023, staffing companies hired 12.7 million temporary and contract employees.
What is the difference between a staffing agency and a recruitment agency?
A staffing agency typically employs temporary or contract workers and places them with clients, while a recruitment agency typically focuses on finding candidates for permanent roles on the client’s own payroll. Many large firms offer both types of service.
