Press Release


$90.2 Billion in Revenue Reported for Largest US Staffing Firms

157 Firms Ranked by SIA

Mountain View, California — July 30, 2019 — Staffing Industry Analysts (SIA), the global advisor on staffing and workforce solutions, has released its 2019 report on the Largest Staffing Firms in the United States. Ranked by revenue, the report covers firms that generated at least $100 million in US staffing revenue in 2018. This is SIA's 24th annual report on the largest US staffing firms and features 157 companies, marking an increase over the 143 firms included last year.

“This year's report is the most comprehensive bottom-up analysis of the industry's competitive landscape and market share,” said Barry Asin, President of SIA. “The 157 companies in this year’s report generated a combined revenue of $90.2 billion and had an estimated 61% of the market.”

Allegis Group leads the report as the largest firm again this year, with $10.2 billion in US staffing revenue and 6.9% market share. Allegis has been listed as the largest staffing firm in the US for thirteen consecutive years. Netherlands-based Randstad Holding and Switzerland-based Adecco, remained in the number two and three spots respectively, for the third year in a row. With Robert Half International achieving fourth position and Kelly Services as fifth, these two firms swapped positions from their rankings on SIA’s previous list.    

The five largest US staffing firms are:

Company 2018 US Staffing Revenue($million) Market Share Headquarters Country
Allegis Group 10,233 6.9% USA
Randstad Holding 4,791 3.2% The Netherlands
Adecco 4,585 3.1% Switzerland
Robert Half International 3,679 2.5% USA
Kelly Services 3,528 2.4% USA

Seventeen firms are included in this year’s report that did not appear in last year’s version: 22nd Century Technologies, CareerStaff Unlimited (Genesis HealthCare), CoreMedical Group, CSI (Consulting Solutions International), Full Steam Staffing, Green Key Resources, Hayes Locums, LaborMAX Staffing, Lancesoft, Lyneer Staffing Solutions, MedPro Healthcare Staffing, MWIDM, Staffing Alternatives, Surge Staffing, TalentLaunch, Tradesmen International, and Vdart.

“As the US economy enters into a record eleventh year of expansion, our report highlights the breadth and depth of staffing companies currently operating in the US marketplace,” said Timothy Landhuis, Director of Research, North America at SIA. “Capitalizing on the need for staffing services across all sectors of the economy, we continue to see a multitude of industrial and professional staffing firms sustain impressive revenue levels and achieve further growth.”

The full 2019 Largest Staffing Firms in the United States report is available for SIA’s Corporate and CWS Council Members.

About Staffing Industry Analysts (SIA)

SIA is the Global Advisor on Staffing and Workforce Solutions
Elevating the Workforce Solutions Ecosystem
Founded in 1989, SIA is the global advisor on staffing and workforce solutions. Our proprietary research covers all categories of employed and non-employed work including temporary staffing, independent contracting and other types of contingent labor. SIA’s independent and objective analysis provides insights into the services and suppliers operating in the workforce solutions ecosystem including staffing firms, managed service providers, recruitment process outsourcers, payrolling/compliance firms and talent acquisition technology specialists such as vendor management systems, online staffing platforms, crowdsourcing and online work services. We also provide training and accreditation with our unique Certified Contingent Workforce Professional (CCWP) program.

Known for our award-winning content, data, support tools, publications, executive conferences and events, we help both suppliers and buyers of workforce solutions make better-informed decisions that improve business results and minimize risk. As a division of the international business media company, Crain Communications Inc., SIA is headquartered in Mountain View, California, with offices in London, England.

Media Contact
Jennifer Arcuni, Communications Director, Staffing Industry Analysts  |  +1 650-390-6171  |


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