OA500 2024 Ranks World’s Top 500 Outsourcing Firms

What is the OA500 2024 and which firms top the ranking?
The OA500 2024 is Outsource Accelerator’s annual ranking of the world’s top 500 outsourcing firms, assessed against more than 20 public data points, with Accenture, Teleperformance, and Concentrix taking the top three places.
- The 2024 index screened 2,847 outsourcing firms globally, up 26% from 2023.
- The 500 ranked firms generated a combined $590.87 billion in revenue and account for 94.7% of total industry revenue.
- Over half of the ranked companies (55.6%) are headquartered in the United States, followed by India and the United Kingdom.
MANILA, PHILIPPINES, March 7, 2024, Outsource Accelerator, the leading global outsourcing marketplace, today announced the release of its highly anticipated 2024 OA500 report, ranking the top 500 outsourcing companies worldwide.
The OA500 uses an objective methodology evaluating over 20 public metadata points to provide a definitive view into the global outsourcing industry. The 2024 report features an enhanced ranking system, and longitudinal analysis, providing an even more comprehensive insight into the global outsourcing industry and its top 500 firms.
This year’s Global Outsourcing Firm (BPO) Index assessed 2,847 outsourcing firms globally, up by 26% from 2023.
Key Highlights from the 2024 OA500 Analysis:
- Double-Digit Industry Growth: The OA500 firms generated a combined $590.87 billion in revenue, up 13.8% from $519.25 billion in 2023. They account for 94.7% of the total industry revenue, despite counting for just 17.5% of companies. The OA500 workforce represents 97.9% of the total industry workforce. The increase of large BPO companies in the rankings has surpassed the total workforce last year alone with 7.86 million, which is 24.9% higher than last year’s 6.29 million.
- Online Presence Opportunity: While capturing 92.5% of total industry web traffic (up from 91.8%), OA500 firms experienced a dramatic 23% year-on-year decline in online traffic.
- U.S. Firms Maintain Dominance: The top 500 firms are present in 11,493 locations worldwide. Over half (55.6%) of ranked companies are headquartered in the United States (278 firms), followed by India at 12.6% (63 firms) and the United Kingdom at 6% (30 firms).
- Employee Satisfaction: The average Glassdoor rating for small and mid-sized OA500 firms was 4.1, signaling positive workplace cultures and employee engagement. On the other hand, the average rating for large OA500 companies is 3.7.
- Emerging Trends: The healthcare outsourcing segment experienced significant gains primarily due to the ongoing healthcare staffing crisis in the United States. Emerging technologies and specialty services are expected to unlock new capabilities, positioning the OA500 firms to further enable global organizational focus.
“The 2024 OA500 report offers an unrivaled analysis of the top 500 outsourcing firms globally, assessing their progress both individually and as a cohort compared to 2023,” said Derek Gallimore, Founder and CEO of Outsource Accelerator. “We go deep into the trends, challenges, and opportunities shaping the outsourcing landscape, making this report an invaluable resource for industry stakeholders.”
Professional services giant Accenture retains the #1 spot, followed by Teleperformance and Concentrix rounding out the top three.
Top 10 Outsourcing Firms in the 2024 OA500:
Visit outsourceaccelerator.com/oa500 to access the full 2024 OA500 rankings and insights from Outsource Accelerator.
For media inquiries, contact:
News and Public Relations Team, Outsource Accelerator
About Outsource Accelerator
Outsource Accelerator (OA) is the world’s trusted source of independent information, advisory, and expert implementation of outsourcing, offering the world’s leading aggregator marketplace for outsourcing. www.outsourceaccelerator.com
Frequently asked questions
How many firms were assessed for the 2024 OA500?
The 2024 Global Outsourcing Firm (BPO) Index assessed 2,847 outsourcing firms worldwide, a 26% increase over 2023, before narrowing to the top 500.
Which company ranked number one in the 2024 OA500?
Accenture retained the number one spot, followed by Teleperformance and Concentrix in second and third.
How much revenue do the OA500 firms represent?
The OA500 firms generated a combined $590.87 billion in revenue, up 13.8% from $519.25 billion in 2023, representing 94.7% of total industry revenue despite being just 17.5% of companies.
Where are most of the top outsourcing firms based?
Most ranked firms are headquartered in the United States (278 firms, 55.6%), followed by India (63 firms, 12.6%) and the United Kingdom (30 firms, 6%).
What methodology does the OA500 use?
The OA500 uses an objective methodology that evaluates more than 20 public metadata points, with the 2024 edition adding an enhanced ranking system and longitudinal analysis.







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