The Top Ten Consulting Firms, Ranked

New York, NY · Est. 1926 · ~$16B revenue; 45,000+ staff

• ·First-place prestige ranking across two decades of independent consultant surveys. [Vault Consulting 50]
• ·Advises the largest verified share of Fortune 100 companies of any firm. [Industry analyses / firm disclosures]

Boston, MA · Est. 1963 · ~$12B revenue; 32,000+ staff

• ·Creator of foundational strategy frameworks (growth-share matrix) still in global use. [Business literature record]
• ·Consistent top-two prestige and employee-satisfaction placement. [Vault Consulting 50]

Boston, MA · Est. 1973 · Results-delivery model; PE diligence leader

• ·Highest client Net Promoter Score claims verified by third-party research in the strategy segment. [Bain client research / industry studies]
• ·Leading private-equity diligence practice by deal volume. [PitchBook / industry rankings]

New York, NY · Est. 1845 · Largest consulting practice globally by revenue

• ·Largest consulting organization in the world by verified revenue. [Deloitte global revenue report]
• ·Broadest implementation capability across technology and operations. [Gartner / Forrester coverage]

New York, NY (listed) · Est. 1989 · ~$65B revenue; 750,000+ staff

• ·Largest publicly traded professional-services firm with fully audited results. [ACN 10-K filings]
• ·Leader across the most Gartner and Forrester capability evaluations of any firm. [Gartner Magic Quadrants]

New York, NY · Est. 1849 · Big Four; Strategy& strategy arm

• ·Strategy& lineage traces to Booz & Company, the oldest strategy-consulting practice. [Firm history records]
• ·Verified scale across assurance, tax, and advisory provides unique cross-practice depth. [PwC global annual review]

New York, NY · Est. 1991 · EY's strategy arm; strong education & PE practices

• ·Rapid verified rise into the top tier of strategy rankings since joining EY. [Vault Consulting 50]
• ·Leading education-sector and transaction-strategy practices. [Industry rankings]

Chicago, IL · Est. 1926 · Operations & supply-chain specialist

• ·Near-century operating history with a verified operations-transformation specialty. [Firm records / Vault profiles]
• ·Consistent top-ten placement in operations consulting rankings. [Vault Consulting 50]

New York, NY · Est. 1984 · Marsh McLennan subsidiary; financial-services depth

• ·Top-tier financial-services consulting verified by banking-client penetration. [Industry analyses]
• ·Strong placement in consultant-quality surveys. [Vault Consulting 50]

McLean, VA · Est. 1914 · Public company (NYSE: BAH); ~$10B revenue

• ·Dominant US government consulting position with audited public financials. [BAH 10-K filings]
• ·110-year continuous operating history, among the longest in the industry. [Firm records]