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15 Largest Consulting Companies in the World (2026 Edition)
The largest consulting company in the world is Tata Group, with an annual revenue of $128 billion.
As of 2022, the global management consulting industry had a market size of $973.67 billion.
There are 1,912,761 people employed in the management consulting industry in the U.S.
The global management consulting industry is projected to grow at a CAGR of 7.9% through 2026.
In today’s fast-paced business environment, companies—large and small—often turn to consulting firms for expert advice. This thriving industry is dedicated to helping organizations navigate challenges, optimize performance, and achieve their goals. With a blend of traditional consulting and innovative problem-solving solutions, these firms continue to adapt to the evolving needs of businesses in the digital age.
Below is a list of the 15 largest consulting companies in the world, ranked by their most recent annual revenue:
15 Largest Consulting Companies in the World
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Tata Group. Mumbai, India
2022 Annual Revenue: $128 billion
Tata Consultancy Services offers comprehensive information technology, digital, and business consulting services, along with a diverse array of products and platforms. Established in 1968, TCS has grown into a global leader, employing over 400,000 people across more than 10 sectors, including finance, healthcare, transportation, and retail.
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Deloitte. London, England, U.K.
2022 Annual Revenue: $59.3 billion
Founded in 1845, Deloitte boasts a workforce of over 300,000 across 150 countries. While headquartered in London, it has a significant presence in the U.S. since 1890. Deloitte’s extensive service offerings include audit, risk advisory, and tax services, with consulting alone generating $19.8 billion in 2020.
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PricewaterhouseCoopers. London, England, U.K.
2022 Annual Revenue: $50.3 billion
PWC, a leader in professional services globally, operates in 157 countries with 276,000 employees. Their advisory services span strategy, risk management, and technology consulting across various industries.
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Accenture. Dublin, Ireland
2022 Annual Revenue: $61.59 billion
Accenture, founded in 1989, specializes in consulting services, including AI, business process outsourcing, and digital transformation. With a workforce of 514,000 across 200 locations, Accenture caters to clients in over 120 countries.
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Ernst Young. London, England, U.K.
2022 Annual Revenue: $45.4 billion
Tracing its origins to 1849, Ernst & Young employs approximately 300,000 staff worldwide. The firm provides a wide array of services, including auditing, tax advisory, and digital strategy, serving over 200,000 clients in 150 countries.
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Cognizant. Teaneck, New Jersey, U.S.A.
2022 Annual Revenue: $19.4 billion
Cognizant Technology Solutions, founded in 1994, focuses on IT consulting, business consulting, and outsourcing. With over 280,000 employees, it primarily serves the North American market.
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Infosys Public Services. Fremont, California, U.S.A.
2021 Annual Revenue: $13.561 billion
Established in 2004, Infosys Consulting offers strategy and technology consulting for over 200 clients across 19 countries. The company’s headquarters are in Fremont, California, with 13 additional hubs worldwide.
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Boston Consulting Group. Boston, Massachusetts, U.S.A.
2022 Annual Revenue: $11.7 billion
Founded in 1963, BCG is a prestigious management consulting firm recognized for its innovative strategies. With 21,000 employees in over 50 countries, BCG serves clients through various specialized units.
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McKinsey & Company. New York, New York, U.S.A.
2022 Annual Revenue: $12.5 billion
Founded in 1926, McKinsey & Company offers management consulting services across various industries, employing professionals from diverse fields, including medicine and engineering. The firm operates in over 65 countries.
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CGI Group. Montreal, Canada
2022 Annual Revenue: $10.07 billion
CGI Group specializes in IT consulting services across multiple sectors, offering solutions in business process and technology management to clients globally. The firm employs 76,000 across 400 locations.
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Booz Allen Hamilton. McLean, Virginia, U.S.A.
2022 Annual Revenue: $8.36 billion
Founded in 1914, Booz Allen Hamilton focuses on management and IT consulting, covering areas such as analytics, digital solutions, and engineering. The firm’s revenue represents the entire holding corporation.
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Bain & Company. Boston, Massachusetts, U.S.A.
2022 Annual Revenue: $6 billion
Bain & Company, founded in 1973, provides consulting services in strategy, digital transformation, and sustainability. With 59 offices in 37 countries, the firm is committed to significant pro bono contributions and has worked with many Global 500 companies.
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Gartner. Stamford, Connecticut, U.S.A.
2022 Annual Revenue: $5.5 billion
Gartner is a research and advisory firm providing consulting and technical services. With a workforce of nearly 17,000, Gartner supports clients across 100 countries in customer service, finance, IT, and more.
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Mercer. New York, New York, U.S.A.
2022 Annual Revenue: $2.28 billion
A subsidiary of Marsh & McLennan, Mercer specializes in health and benefits, investment, and workforce consulting, with a global presence across North America, Europe, Asia, and beyond.
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Capgemini Invent. Paris, France
2022 Annual Revenue: $24.13 million
Capgemini Invent focuses on digital innovation and transformation consulting. Launched in 2018, it merges consulting with technology and data science expertise, employing over 6,000 professionals worldwide.
Consulting Companies FAQ
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What is a consulting firm?
A consulting firm is a business comprised of industry-specific experts that provide advice and guidance to organizations. These firms specialize in various areas and analyze businesses to identify solutions for their challenges.
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What are the types of consulting firms?
Consulting firms can be categorized into:
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Strategy consulting
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Operations consulting
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Financial consulting
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Human resources consulting
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Marketing consulting
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Is the management consulting industry growing?
Yes, the management consulting industry is experiencing growth, with a projected increase of 7.9% through 2026. The market for management consulting in the U.S. has shown steady growth, reflecting the increasing demand for consulting services in various sectors.
As businesses continue to evolve in a technology-driven world, the demand for expert consulting services is expected to rise. The firms listed above play critical roles in shaping strategies that drive success and innovation across industries.
- Services
- Largest Advertising Companies
- Largest Law Firms
- Largest Insurance Companies
- Largest For Profit Education Companies
- Largest Lobbyist Companies
- Largest Consulting Firms
- Largest Photography Companies
- Largest Engineering Companies
- Largest Marketing Companies
- Largest Multi Level Marketing Companies
- Largest HR Companies
- Largest PR Firms
- Largest Warehousing Companies
- Largest Waste Management Companies
- Largest Janitorial Companies
- Largest Temp Agencies
- Largest Security Companies
- Largest Recruiting Firms
Author
Abby is a writer who is passionate about the power of story. Whether it’s communicating complicated topics in a clear way or helping readers connect with another person or place from the comfort of their couch. Abby attended Oral Roberts University in Tulsa, Oklahoma, where she earned a degree in writing with concentrations in journalism and business.
