McKinsey & Company vs EY
Side-by-side comparison of AI visibility scores, market position, and capabilities
New York global management consulting (founded 1926, private) at ~$16B 2024 revenue; 40% AI-related projects, QuantumBlack AI (350+ scientists), "State of AI 2025" thought leadership competing with BCG and Deloitte for C-suite AI strategy.
About
McKinsey & Company is a New York City-based global management consulting firm — privately held as a partnership — providing strategy, operations, technology, and organization consulting to CEOs and C-suites of the world's largest corporations, governments, and institutions through approximately 40,000 professionals across 130+ offices in 70+ countries and approximately $16 billion in estimated revenue in 2024. Founded in Chicago in 1926 by James O. McKinsey, a University of Chicago accounting professor, the firm's modern identity was shaped by Marvin Bower (who joined in 1933 and led the firm from 1950-1967, establishing the partnership model, professional ethics standards, and global expansion that define McKinsey today). Global Managing Partner Bob Sternfels (reelected to a second and final three-year term in February 2024) oversees the firm through a challenging period that includes reputation headwinds from its opioid consulting work and global scrutiny of consulting industry practices. McKinsey's service capabilities span traditional strategy consulting through McKinsey Digital (digital transformation, analytics), QuantumBlack (AI and machine learning, acquired 2015), and McKinsey Technology (CTO/CIO advisory, technology strategy) — with over 7,000 employees in digital and technology roles and approximately 40% of 2024 projects estimated to be AI-related. McKinsey's "State of AI in 2025" report found that organizations now mitigate an average of four AI-related risks (versus two in 2022) and that AI high performers (6% of survey respondents) attribute 5%+ EBIT improvement to AI, with AI agents increasingly deployed as virtual coworkers rather than passive research assistants.
Big Four professional services partnership at $51.2B FY2024 revenue (+3.9%); CEO Janet Truncale launched EY.ai Agentic Platform with NVIDIA (150 agents, 80K professionals) competing with Deloitte and PwC for global audit and consulting.
About
EY (Ernst & Young) is a London-based global professional services partnership — one of the Big Four accounting and consulting firms — generating $51.2 billion in record annual revenue in fiscal year 2024 (+3.9%), with approximately 393,000 professionals operating across more than 700 offices in over 150 countries and territories. EY's roots trace to 1903 when Alwin C. Ernst and Theodore Ernst founded Ernst & Ernst in Cleveland, Ohio; the modern EY emerged from the historic 1989 merger of Ernst & Whinney and Arthur Young & Co. EY's integrated service model spans assurance (the highest-revenue segment among Big Four peers), consulting, strategy and transactions through EY-Parthenon (created via the 2014 acquisition of The Parthenon Group), and tax services. In July 2024, Janet Truncale became EY's Global Chair and CEO, the first woman to lead the firm. In 2025, EY launched the EY.ai Agentic Platform in partnership with NVIDIA, deploying 150 AI agents supporting 80,000 EY professionals across tax, risk, and finance domains to surpass 3 million tax compliance outcomes annually.
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