Marsh McLennan vs Brown & Brown
Side-by-side comparison of AI visibility scores, market position, and capabilities
World's largest insurance broker network (Marsh, Guy Carpenter, Mercer, Oliver Wyman); $23.4B FY2024 revenue; hard market tailwind 2019-2024; cyber insurance leader; competes with Aon, Willis Towers Watson.
About
Marsh McLennan is the world's leading professional services firm in risk, strategy, and human resources, formed through the merger of Marsh & McLennan Companies and operating four market-leading subsidiaries: Marsh (global insurance broker and risk management advisor), Guy Carpenter (global reinsurance broker), Mercer (human resources and employee benefits consulting), and Oliver Wyman (management consulting). Headquartered in New York City and trading on NYSE (MMC), the company generated approximately $23.4 billion in revenues for FY2024 under CEO John Doyle, who succeeded longtime CEO Dan Glaser in 2022 and has maintained the firm's organic growth momentum and selective acquisition strategy. Marsh, the flagship insurance brokerage, is the world's largest insurance broker by revenue, advising corporations globally on risk placement, captive insurance programs, and risk management strategies across property, casualty, marine, and specialty lines.
Daytona Beach FL insurance brokerage (NYSE: BRO) $4.5B FY2024 revenue (+12%); decentralized acquisition model, National Programs specialty, 30-year consistent growth competing with Marsh McLennan and Aon.
About
Brown & Brown, Inc. is a Daytona Beach, Florida-based insurance brokerage and risk management company — publicly traded on the New York Stock Exchange (NYSE: BRO) as an S&P 500 Financials component — providing insurance brokerage, risk management consulting, and third-party claims administration services to businesses and individuals across the United States, Canada, the UK, Ireland, and Bermuda through approximately 16,000 employees at 500+ offices. In fiscal year 2024, Brown & Brown reported revenues of $4.5 billion (+12% organic growth) — continuing its 30-year track record of consistent organic and acquisition-driven revenue growth that has made Brown & Brown one of the fastest-growing large insurance brokers in the US, growing from $1B revenue in 2015 to $4.5B in 2024 through organic growth compounding and disciplined acquisition integration. CEO Powell Brown (son of founder Hyatt Brown, representing the family's generational leadership of the company) leads Brown & Brown's distinctive "decentralized" operating model where each acquired insurance agency retains its local brand identity, leadership team, and community relationships while benefiting from Brown & Brown's national carrier relationships, compliance infrastructure, shared technology, and capital for further acquisition. Brown & Brown's four business segments — Retail (local commercial insurance for small-to-midsize businesses), National Programs (specialty program insurance distributed through managing general agents for specific industries — veterinarians, dentists, pest control, construction), Wholesale Brokerage (surplus lines excess and specialty placement for non-admitted risks), and Services (third-party claims administration) — provide diversified revenue across insurance distribution channels that smooth individual market cycle volatility.
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