Heffernan Insurance Brokers vs 
Marsh: How Do They Compare for Professional Liability (E&O) Insurance?
Marsh brings attorneys, economists and actuaries to professional liability for banks, asset managers, architects and venture firms. Heffernan Insurance Brokers' small-business division serves sole proprietors through fast-growing companies.
Marsh places professional liability for specialized industries such as banking, asset managers and venture capital, while Heffernan's small-business division serves a broader, less specialized client base. 2,1
What Are the Key Differences Between Heffernan Insurance Brokers and Marsh Professional Liability (E&O) Insurance?
Which Businesses Each Targets
Marsh names specialized industries its professional liability experts serve, including banking and broker/dealers, insurance companies and asset managers, merchant banking and venture capital, accountants, attorneys, architects and engineers, media and entertainment, technology, and healthcare and biotechnology. 2 1
When comparing Heffernan Insurance Brokers and Marsh, use the stated fit categories to rule either provider in or out before spending time on an application.
What the Coverage Description Includes
Marsh says professional liability policies can protect against liability and defense costs from an error, omission or negligence claim, and that many of the policies it places also cover privacy violations and computer security breaches. 2 1
What Should You Confirm in Heffernan Insurance Brokers and Marsh Professional Liability (E&O) Insurance Quotes?
- Ask Marsh and Heffernan which insurer would issue your policy, since neither reviewed page names one. 2 3 1
- Ask Marsh whether the specific policy it recommends includes privacy or computer-security coverage, or whether that requires a separate cyber policy. 2
- If your business doesn't fit Marsh's named specialized industries, confirm whether its practice still places your coverage. 2
- Ask Heffernan which carriers it typically places E&O with for a business your size. 1
Heffernan Insurance Brokers vs Marsh Professional Liability (E&O) Compared
Heffernan Insurance Brokers vs Marsh: Professional Liability (E&O) Insurance: documented features by provider
| Criteria | Heffernan Professional Errors and Omissions Brokerage | Marsh Professional Liability Insurance Brokerage |
|---|---|---|
| Who It’s For | Heffernan's small-business division says it serves sole proprietors through fast-growing companies across industries including construction, food, health care, hospitality, nonprofits, real estate, technology, transportation, and vintners and growers, and will custom-design a package for industries not listed. 1Company-reported. Small Business Insurance page as read on 2026-09-23; not exclusively E&O-specific, but describes the buyer base for the page listing this coverage. | Marsh names specialized industries its professional liability experts serve, including banking and broker/dealers, insurance companies and asset managers, merchant banking and venture capital, accountants, attorneys, architects and engineers, media and entertainment, technology, and healthcare and biotechnology. 2Company-reported. Marsh professional liability page, What We Offer section. |
| Coverage Features | Heffernan describes errors and omissions coverage as protecting against claims for problems with a company's product or service that result in a financial loss to a client. 1Company-reported. Small Business Insurance page as read on 2026-09-23; the page does not list specific exclusions, claims-made versus occurrence form, or endorsements. | Marsh says professional liability coverage can protect a company against liability and defense costs from a claim alleging an error, omission or negligence in performing professional services, and that many policies also cover privacy violations and computer security breaches. 2Company-reported. Marsh professional liability page opening description; illustrative policy description, not a specific policy form. |
| Role in This Line | Heffernan lists errors and omissions among the coverages its small-business division places for clients, shopping the line with insurers rather than underwriting it. 1Company-reported. Small Business Insurance page as read on 2026-09-23; no dedicated professional-E&O product page was found. | Marsh's financial and professional liability practice places professional liability (errors and omissions) insurance; MMA also places E&O coverage within its executive and professional liability practice for middle-market clients. 2,3Company-reported. Marsh professional liability page and MMA executive and professional liability page. |
