Staffing Industry Analysts estimates the 100 largest staffing firms in the world had 43% of global staffing revenue in 2020, down from 45% in the previous year. Overall, the world’s 100 largest staffing firms posted combined revenue of $206 billion, down from $224 billion in 2019.
The data comes in a report released by SIA Dec. 10, “Largest Global Staffing Firms 2021.”
In total, SIA estimates the global staffing market to have been worth $482.5 billion in 2020.
The 10 largest firms on the list this year include:
| Rank | Company | Headquarters country | 2020 revenue (billions) | Market share% |
| 1 | Randstad | Netherlands | $21,842.6 | 4.5% |
| 2 | The Adecco Group | Switzerland | $19,580.0 | 4.1% |
| 3 | ManpowerGroup | US | $16,391.0 | 3.4% |
| 4 | Recruit | Japan | $11,287.7 | 2.3% |
| 5 | Allegis Group | US | $10,717.9 | 2.2% |
| 6 | Hays | UK | $7,288.5 | 1.5% |
| 7 | Persol Holdings | Japan | $6,659.8 | 1.4% |
| 8 | Kelly | US | $4,067.0 | 0.8% |
| 9 | Robert Half International | US | $3,847.4 | 0.8% |
| 10 | Outsourcing | Japan | $3,436.1 | 0.7% |
The rankings of the top three have not changed from the prior year.
Of the total 100 largest firms, 41 are based in the United States; 38 in Europe, the Middle East and Africa; and 21 in Asia Pacific.
This list, available to corporate members of SIA, follows an earlier list of the largest staffing firms in the US.