Coalition vs Marsh: Professional Liability / E&O Insurance

Marsh places professional liability for specialized sectors like banking, venture capital and biotech, backed by attorneys and actuaries. Coalition markets professional liability to any business performing professional services, as an Active Cyber add-on.

Kearny Risk organizes these comparisons for firms whose advice, content or technology creates professional exposures.Research updated 2026-09-29

What Are the Key Differences Between Coalition and Marsh Professional Liability (E&O) Insurance?

Placement and Claims Support

Marsh places coverage with outside insurers, while Coalition combines MPL with its own cyber relationship. [5] [1] Marsh describes attorneys, economists and actuaries assessing exposures before placement; Coalition describes an in-house claims team managing MPL and cyber claims together. [5] [1] The services serve different stages; If you want exposure assessment before buying, Marsh describes that service; Coalition focuses on handling MPL and cyber claims together after purchase.

Coverage Breadth

Coalition lists defense costs, settlements, judgments and other expenses for professional-services errors on a duty-to-defend basis. [1] Marsh says many policies it places also cover privacy violations and computer-security breaches, depending on the chosen wording. [5] Ask Marsh to confirm cyber terms for the specific quote.

What Should You Confirm in Coalition and Marsh Professional Liability (E&O) Insurance Quotes?

  • Ask Marsh which insurer it proposes and whether privacy and computer-security claims are included. [5]
  • Ask Coalition whether Active Cyber is required and who issues the MPL. [1] [2]
  • Compare the insurer, limits, exclusions and claims service in each quote. [1] [5]

Areas of coverage

Coalition

  • role: Coalition designs and distributes MPL as an add-on coverage that combines with certain Active Cyber Insurance policies, sold through appointed brokers. Miscellaneous Professional Liability product page as read on 2026-09-23.company-reportedSource ↗
  • eligibility: Coalition markets MPL to any business that performs professional services, naming examples such as consultants, marketing and PR firms, staffing firms, printers, interior decorators, photographers and videographers, and property managers. Miscellaneous Professional Liability product page as read on 2026-09-23.company-reportedSource ↗
  • coverage: Coalition says MPL covers defense costs, settlements, judgments, and other expenses from claims of errors and omissions in professional services, including negligence, failure to provide service, and misstatements about the service performed, on a duty-to-defend basis even when the business is not ultimately at fault. Miscellaneous Professional Liability product page as read on 2026-09-23; the issued policy controls actual terms.company-reportedSource ↗
  • insurer: Coalition's disclaimer page has named sections for admitted cyber, non-admitted cyber, and admitted executive risk, but no equivalent 'Admitted MPL' section, indicating MPL is placed on a non-admitted (surplus lines) basis with unaffiliated insurers the disclaimer does not name. U.S. Disclaimers page as read on 2026-09-23; the buyer's declarations page names the actual issuing insurer.not-disclosedSource ↗
  • application: Coalition sells MPL only as an addition to an Active Cyber Insurance quote, saying it takes just a few extra questions to add, rather than as a stand-alone policy. Miscellaneous Professional Liability product page as read on 2026-09-23.company-reportedSource ↗
  • claims: Coalition says its in-house claims team manages both MPL and cyber claims in one place, which it describes as a smoother, more coordinated process for the policyholder. Miscellaneous Professional Liability product page as read on 2026-09-23; speed and efficiency descriptions are company-reported and not independently verified.company-reportedSource ↗

Marsh

  • role: 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. Marsh professional liability page and MMA executive and professional liability page.company-reportedSource ↗Source ↗
  • coverage: 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. Marsh professional liability page opening description; illustrative policy description, not a specific policy form.company-reportedSource ↗
  • eligibility: 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. Marsh professional liability page, What We Offer section.company-reportedSource ↗
  • insurer: The reviewed pages do not name a specific professional liability insurer. Marsh professional liability page and MMA executive and professional liability page as read on 2026-09-23.not-disclosedSource ↗Source ↗
  • services: Marsh says it employs attorneys, economists and actuaries alongside coverage specialists to assess a client's professional liability exposure from multiple angles, given the complexity of these risks. Marsh professional liability page.company-reportedSource ↗

Marsh serves specialized sectors such as banking, asset management and healthcare; Coalition offers MPL only with an Active Cyber quote.

Sources reviewed

  1. 01
    Miscellaneous Professional Liability

    Coalition · Why Miscellaneous Professional Liability?; MPL Advantage; What does MPL cover?; What types of claims does MPL protect against?; What types of businesses could benefit from MPL?; Why does 'Duty to Defend' coverage matter? · accessed 2026-09-23

  2. 02
    U.S. Disclaimers

    Coalition · Non-Admitted Cyber; Admitted Cyber; Admitted Executive Risk (names Zurich American Insurance Company, NAIC 16535); no 'Admitted MPL' or 'Admitted Tech E&O' section appears on the page · accessed 2026-09-23

  3. 03
    Professional Liability – US Direct Errors and Omissions Insurance

    Hiscox Inc. specimen · About this Policy / Coverage for Claims Made Against You; I.A Insuring Agreement; I.B Defense; I.C Settlement; II.A Notice of Claims; II.C Optional Extended Reporting Period; III.A, III.K, III.M, III.R, III.S Exclusions; IV.A–B Limits and Deductible; VI.O Professional Services; VI.U Wrongful Act · accessed 2026-09-16

  4. 04
    Professional liability insurance

    Insurance Information Institute · Opening paragraphs (professional services/advice and E&O name); Claims not covered by general liability; What types of businesses need professional liability insurance?; What’s covered… and what’s not (claims-made versus occurrence, defense and judgments, non-financial/intentional limits, BOP/in-home exclusion) · accessed 2026-09-16

  5. 05
    Professional liability

    Marsh · Opening description; What We Offer: specialized industries served (banking, insurance/asset managers, merchant banking/venture capital, accountants/attorneys/architects/engineers, media/communications/entertainment, technology, healthcare/biotechnology) · accessed 2026-09-23

  6. 06
    Expert Executive and Professional Liability Insurance

    Marsh McLennan Agency · Our policies include D&O, E&O, EPL, commercial crime/fidelity, network security privacy risk/cyber, fiduciary, media liability, IP, architects and engineers, lawyers professional, and kidnap and ransom · accessed 2026-09-23

  7. 07
    FAQ: Professional liability insurance

    Texas Department of Insurance · What’s professional liability coverage?; What types of damages…; What’s general liability insurance?; Do I need professional liability… if I have general liability…?; Is professional liability insurance required?; Can a client require…?; What’s the difference between occurrence policies and claims-made policies · accessed 2026-09-16

  8. 08
    Get business insurance

    U.S. Small Business Administration · Six common types of business insurance table · accessed 2026-09-16

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