Gallagher vs Marsh McLennan Agency: How Do They Compare for Professional Liability (E&O) Insurance?

Gallagher says E&O can respond to claims involving past work, temporary staff and independent contractors, subject to the issued policy. MMA names E&O, A&E and lawyers professional lines. 6,9

What Is Gallagher?

Gallagher’s technology specialists serve startups through global enterprises, while its executive-risk team supports IPO and M&A needs; small firms seeking one simple digital quote should compare online agencies. 1,2,3,4,5

Read the Gallagher profile

Read the Gallagher Professional Liability (E&O) Insurance page

What Is Marsh McLennan Agency?

Marsh McLennan Agency provides business insurance and employee health and benefits, alongside retirement, wealth, and private-client services across the United States and Canada. Its US small-business page lists six common coverage types and directs buyers to request a personalized quote by phone; the insurer and terms for a specific placement must be confirmed in the proposal. 7,8

Read the Marsh McLennan Agency profile

Read the Marsh McLennan Agency Professional Liability (E&O) Insurance page

What Is Professional Errors and Omissions (E&O) Insurance?

Professional liability can help pay defense costs and covered losses when a client says your advice or service caused financial harm. If customers rely on your work, list every service you provide and check the claims-made reporting and prior-work terms. 10,11,12,13

Read the full coverage guide

Key Differences in Professional Liability (E&O) Insurance

Work history and people whose work may trigger a claim

Gallagher describes E&O claims involving past work, temporary staff and independent contractors, as well as legal costs for alleged professional-service losses; its record notes medical malpractice is handled as a separate specialized line. MMA’s source names general E&O and distinct lawyer and architect/engineer products. A business using contractors should compare the insured-person wording in the proposed form with Gallagher’s listed examples and identify any profession-specific MMA policy. 6 9

Scope by professional class

Gallagher recommends E&O for small businesses providing professional services and gives technology, accounting, tax, wealth-management and legal examples. MMA’s source lists E&O, A&E and lawyers lines as distinct suite offerings. A licensed profession should check whether a general E&O form or a specialized policy applies in either quote; ask for the carrier, prior-acts date and contractor definition in writing. 6 9

What to Confirm in Professional Liability (E&O) Insurance Quotes

  • Does Gallagher’s proposed form include prior work and contractor claims for your profession? 6 9
  • Which MMA specialist line and insured-person definition fit the work and license involved? 6 9

Gallagher and Marsh McLennan Agency Review Scores for 2026

These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.

Gallagher Review Score

9.3/ 10

Review Score

3 rated sources

Gallagher has strong Trustpilot feedback and a favorable historical large-commercial survey result. Neither directly measures today’s US small-business service.[2][4][6]

Read Gallagher reviews

Marsh McLennan Agency Review Score

8.2/ 10

Review Score

2 rated sources

There are almost no public customer reviews of Marsh McLennan Agency (MMA). Trustpilot shows 3.2 out of 5, but from a single review, and BBB shows an A grade with four complaints closed in three years.[8][9][1]

Read Marsh McLennan Agency reviews

Gallagher vs Marsh McLennan Agency Professional Liability (E&O) Compared

Gallagher vs Marsh McLennan Agency: Professional Liability (E&O) Insurance: documented features by provider

CriteriaGallagher Small Business Errors and Omissions InsuranceMarsh McLennan Agency professional errors omissions (official overview)
Role in This Line

Gallagher Small Business arranges errors and omissions (E&O) coverage with partner carriers rather than underwriting the policy itself. 6Company-reported. Gallagher Small Business's direct-to-small-business E&O product page.

Marsh McLennan Agency describes arranging professional errors omissions for the audience stated on the cited product page. 9Company-reported. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Issuing Insurer

The E&O product page does not name the insurer that would issue a given business's policy. 6Not publicly disclosed. Checked the E&O product page on 2026-09-23.

Confirm in your quote.

Who It’s For

Gallagher recommends E&O for small businesses that provide a specific professional service, naming technology, insurance, accounting, tax, wealth management and legal services, and lists doctors, lawyers, accountants, nurses, caregivers, counselors, social workers and engineers as example professionals; it also notes that many client contracts require carrying E&O. 6Company-reported. Product page eligibility and recommended-professions lists; actual acceptance depends on underwriting.

Organizations seeking professional liability placement; source does not imply all professions share one policy. 9Company-reported. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Coverage Features

Gallagher describes E&O as protecting against client charges of negligence or injury tied to professional services, covering losses, attorney fees and court costs regardless of fault, and specifically responding to alleged or actual negligence, personal injury, copyright infringement, punitive damages, and claims against past work, temporary staff or independent contractors. 6Company-reported. Product page coverage description; the issued policy and its exclusions control. Note this record excludes medical malpractice, which the page treats as a separate specialized coverage covered under its own line.

Gallagher's small-business team says the E&O market has seen consistent rate increases that have started to moderate, driven by higher claim frequency, litigation costs and a more litigious environment, and that insurers are more selective and require more detailed underwriting information. 6Company-reported. Product page market-commentary section; a general market view, not a quote for any specific business.

The cited product page describes E&O and named specialist professional lines, including architects and engineers and lawyers professional liability; the overview does not treat them as one form. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. 9Company-reported. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Limits and Retentions

The E&O product page does not publish limits, deductibles or premiums; it directs prospective buyers to request a quote instead. 6Not publicly disclosed. Checked the E&O product page on 2026-09-23.

The cited overview does not set a universal limit or retention for this line. Ask for the proposed policy form, limits, retentions, exclusions, and conditions in the quote. 9Not publicly disclosed. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred.

How to Apply

Gallagher offers an online quote form, a small business advisor phone line (1-833-292-9441, Monday through Friday, 8 a.m. to 5 p.m., continental U.S.), and a scheduled callback request to start an E&O quote. 6Company-reported. Product page "Get Covered Now" section.

The page invites organizations to contact a Marsh McLennan Agency adviser or specialist to discuss placement. The page does not establish a quote, bind, or coverage-effective timeline. 9Company-reported. professional errors omissions marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement.

Related Pages for Gallagher vs Marsh McLennan Agency

Professional Liability (E&O) Pages for Gallagher and Marsh McLennan Agency

Other Coverage Lines Compared for Gallagher vs Marsh McLennan Agency

Other Professional Liability (E&O) Insurance Provider Comparisons

Sources for Gallagher vs Marsh McLennan Agency

Sources About Gallagher

  1. Technology Insurance. Gallagher; Introduction; Solutions and coverages for the technology industry: Technology errors and omissions including cyber, Intellectual property insurance, Product liability, Employee benefits; Data-driven insights; global network. Accessed 2026-09-16.
  2. Insurance for Technology & IT Businesses. Gallagher Small Business; Protection for IT Professionals & Their Technology-Based Businesses; recommended coverage menu, including Surety Bond Programs; Connect With An Advisor. Accessed 2026-09-16.
  3. Executive and Financial Risk Insurance. Gallagher; Opening (insurance broking and placement); three key services; Directors and Officers; IPO and direct listings; Employment Practices; Fiduciary; Employee Dishonesty (Crime) and Fidelity Bond; Kidnap, Ransom and Extortion; M&A Transactional Insurance. Accessed 2026-09-16.
  4. Legal Information. Gallagher Small Business; Producer identification immediately above Quick Links. Accessed 2026-09-16.
  5. Woodruff Sawyer Is Now Gallagher. Gallagher; Opening; Executive and Financial Risk consulting; Continued access to client portals; contact form. Accessed 2026-09-16.
  6. Errors and Omissions Insurance. Gallagher Small Business; What is Errors and Omissions Insurance?; Do you need Errors and Omissions insurance?; Recommended for professionals including; E&O trends; An E&O policy protects you from; Consider this claim scenario; Get Covered Now. Accessed 2026-09-23.

Sources About Marsh McLennan Agency

  1. Who We Are. Marsh McLennan Agency; Lines 193-195: ‘a business of Marsh’ and company-listed service lines across US and Canada. This does not establish the legal entity for an account, corporate ownership chart, or insurer role. Accessed 2026-09-29.
  2. Small Business Insurance Solutions. Marsh McLennan Agency; Lines 205-207: small-business audience and call invitation; lines 224-249 list six coverage categories and short descriptions; line 264 is an embedded form whose function is not stated. No form submitted. Accessed 2026-09-29.
  3. Executive and Professional Liability | MMA. Marsh McLennan Agency; E&O, architects and engineers, and lawyers professional lines are named in the policy suite. Accessed 2026-09-30.

Sources for the Professional Liability (E&O) Insurance Guide

  1. 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.
  2. 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.
  3. Get business insurance. U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
  4. 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.

Updated . Spot, a product of Tools for Enlightenment, publishes this research and works in the commercial insurance market. The comparison applies the same criteria to both providers. Editorial policy. To suggest a correction, contact Spot with the page URL and supporting source.

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