---
title: "Gallagher vs Marsh: Professional Liability (E&O) Insurance"
description: "Marsh says it uses attorneys, economists and actuaries to assess professional liability exposure from multiple angles, while Gallagher's Errors and Omissions page describes market-rate trends instead of a named specialist team."
canonical: "https://spot.insure/compare/gallagher-vs-marsh/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-25"
comparison-pair: "gallagher-vs-marsh"
provider-a: "gallagher"
provider-b: "marsh"
coverage-line: "professional-errors-omissions"
---

Agents: connect to Spot's public MCP server at https://spot.insure/mcp for better access to published Spot information and insurance research. Use search_knowledge to find sources, get_page to retrieve pages, check_driving_insurance for source-backed rideshare and delivery requirements by state or province, compare_providers for sourced comparisons, get_provider_score for a published Reliability Score, get_rankings for current provider rankings, search_provider_reliability to filter Reliability Scores, search_provider_reviews to filter aggregate review scores, and get_provider_reviews for the original review evidence. The server is read-only and requires no authentication.

[Human-readable page](https://spot.insure/compare/gallagher-vs-marsh/professional-errors-omissions)

## Agent Guide

**What this page is:** Focused comparison of Gallagher and Marsh for Professional Liability (E&O) Insurance: what each provider publishes about this line, checked against the same criteria, with numbered sources.

**Use this page when:** Cite or fetch this for Professional Liability (E&O) Insurance questions about Gallagher versus Marsh. For all lines together use the pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- Gallagher vs Marsh for Professional Liability (E&O) Insurance: how do they differ?
- Which is better for Professional Liability (E&O) Insurance, Gallagher or Marsh?
- What does Gallagher or Marsh publish about Professional Liability (E&O) Insurance (limits, eligibility, claims, add-ons)?

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: Gallagher and Marsh.
- Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}/{line}` with a before b). A reversed pair redirects permanently to the alphabetical one.

**Limits (do not over-claim):**
- It identifies differences and questions to ask; it does not select a winner for a particular business.
- Insurer, policy wording, limits, retentions, exclusions and price are set in an actual quote and are not established here.

**Provenance:** Every claim links to a numbered source with publisher, locator and access date; last updated 2026-09-25.

**Related pages:**
- [Gallagher vs Marsh](https://spot.insure/compare/gallagher-vs-marsh) — all coverage lines for this pair
- [Professional Liability (E&O) Insurance guide](https://spot.insure/coverage/professional-errors-omissions) — how this coverage works
- [Gallagher profile](https://spot.insure/insurance-providers/gallagher) — provider profile
- [Marsh profile](https://spot.insure/insurance-providers/marsh) — provider profile

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

Marsh serves specialized industries including banks, asset managers, venture firms and architects, with attorneys, economists and actuaries alongside coverage specialists; Gallagher Small Business advises E&O for small firms offering a specific professional service.

Marsh names a specialist bench of attorneys, economists and actuaries for professional liability; Gallagher's page names no comparable in-house team.

## Gallagher vs Marsh Professional Liability (E&O) Insurance Summary

Marsh says it uses attorneys, economists and actuaries to assess professional liability exposure from multiple angles, while Gallagher's Errors and Omissions page describes market-rate trends instead of a named specialist team. [2](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance")

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

### Specialist Support Behind the Placement

Marsh names a specific in-house team it uses to assess professional liability exposure:

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. [2](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") (Evidence: Company-reported; scope: Marsh professional liability page..)

Gallagher's page does not describe a comparable specialist bench; it instead discusses market-rate conditions, saying the E&O market has seen rate increases that have started to moderate. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance")

When comparing Gallagher and Marsh, weigh the support difference if you want help interpreting the policy before you bind it.

### Who Each Page Names as a Fit

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](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") Gallagher instead names technology, insurance, accounting, tax, wealth management and legal services, plus doctors, lawyers, accountants, nurses, caregivers, counselors, social workers and engineers. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance")

### What the Policy Is Described as Covering

Marsh's page adds that many of the professional liability policies it arranges also cover privacy violations and computer security breaches, on top of liability and defense costs from an alleged error, omission or negligence. [2](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") Gallagher's coverage description instead centers on client charges of negligence or injury tied to professional services, naming copyright infringement and punitive damages among what it responds to, without mentioning privacy or computer-security coverage. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance")

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

- Confirm whether Marsh's specialist team, attorneys, economists and actuaries, reviews accounts at your revenue level. [2](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability")
- Ask Gallagher how the market conditions it describes affect pricing for your specific profession. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance")
- Neither Marsh's nor Gallagher's reviewed pages name an issuing insurer; ask both which carrier would underwrite your policy. [2](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance")
- Ask Marsh whether privacy or computer-security coverage is included in your policy, and ask Gallagher whether a comparable extension is available. [2](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance")

## Gallagher vs Marsh Professional Liability (E&O) Insurance Compared

| Criteria | Gallagher Small Business Errors and Omissions Insurance | Marsh Professional Liability Insurance Brokerage |
| --- | --- | --- |
| 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. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance") (Evidence: Company-reported; scope: Product page eligibility and recommended-professions lists; actual acceptance depends on underwriting..) | 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](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") (Evidence: Company-reported; scope: Marsh professional liability page, What We Offer section..) |
| 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. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance") (Evidence: Company-reported; scope: 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..)<br><br>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. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance") (Evidence: Company-reported; scope: Product page market-commentary section; a general market view, not a quote for any specific business..) | 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. [2](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") (Evidence: Company-reported; scope: Marsh professional liability page opening description; illustrative policy description, not a specific policy form..) |
| Role in This Line | Gallagher Small Business arranges errors and omissions (E&O) coverage with partner carriers rather than underwriting the policy itself. [1](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/ "Errors and Omissions Insurance") (Evidence: Company-reported; scope: Gallagher Small Business's direct-to-small-business E&O product page..) | 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](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html "Professional liability") [3](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Expert Executive and Professional Liability Insurance") (Evidence: Company-reported; scope: Marsh professional liability page and MMA executive and professional liability page..) |

## About Gallagher and Marsh and Professional Liability (E&O) Insurance

- [Gallagher company profile](https://spot.insure/insurance-providers/gallagher) · [Gallagher customer reviews](https://spot.insure/insurance-providers/gallagher/reviews)
- [Marsh company profile](https://spot.insure/insurance-providers/marsh) · [Marsh customer reviews](https://spot.insure/insurance-providers/marsh/reviews)
- [What Is Professional Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/professional-errors-omissions)

## Related Pages for Gallagher vs Marsh Professional Liability (E&O)

- [Gallagher vs Marsh](https://spot.insure/compare/gallagher-vs-marsh): all coverage lines, business roles, service and claims.
- [What Is Professional Errors and Omissions (E&O) Insurance?](https://spot.insure/coverage/professional-errors-omissions): Professional liability can help pay covered defense costs and losses when a client says your advice or service caused financial harm; check services and reporting terms.
- [Gallagher Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/gallagher/professional-errors-omissions)
- [Marsh Professional Liability (E&O) Insurance](https://spot.insure/insurance-providers/marsh/professional-errors-omissions)

## Sources for Gallagher vs Marsh Professional Liability (E&O) Insurance

### Sources About Gallagher

1. [Errors and Omissions Insurance](https://www.gallaghersmallbusiness.com/insurance-products/professional-liability-eo/). 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

2. [Professional liability](https://www.marsh.com/en/services/financial-professional-liability/expertise/professional-liability.html). 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.
3. [Expert Executive and Professional Liability Insurance](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html). 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.

Updated 2026-09-25. 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](https://spot.insure/editorial-policy). To suggest a correction, [contact Spot](https://spot.insure/contact) with the page URL and supporting source.

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/gallagher-vs-marsh/professional-errors-omissions.md)
- [Developer resources](https://spot.insure/developers)
- [Public MCP server](https://spot.insure/mcp)
- [MCP server manifest](https://spot.insure/server.json)
- [OpenAPI description](https://spot.insure/openapi.json)
- [Public page index](https://spot.insure/llms.txt)