---
title: "Heffernan Insurance Brokers vs Marsh McLennan Agency: Professional Liability (E&O) Insurance"
description: "Heffernan’s small-business division lists E&O among its coverages and describes a broader buyer base; MMA names E&O alongside distinct lawyer and architect/engineer lines."
canonical: "https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-10-01"
comparison-pair: "heffernan-vs-marsh-mclennan-agency"
provider-a: "heffernan"
provider-b: "marsh-mclennan-agency"
coverage-line: "professional-errors-omissions"
---

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

## Agent Guide

**What this page is:** Focused comparison of Heffernan Insurance Brokers and Marsh McLennan Agency 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 Heffernan Insurance Brokers versus Marsh McLennan Agency. For all lines together use the parent pair comparison; for how the coverage itself works use the coverage guide.

**Questions this page answers:**
- Heffernan Insurance Brokers vs Marsh McLennan Agency for Professional Liability (E&O) Insurance: how do they differ?
- Which is better for Professional Liability (E&O) Insurance, Heffernan Insurance Brokers or Marsh McLennan Agency?
- What does Heffernan Insurance Brokers or Marsh McLennan Agency publish about Professional Liability (E&O) Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Professional Liability (E&O) Insurance from Heffernan Insurance Brokers or Marsh McLennan Agency?

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: Heffernan Insurance Brokers and Marsh McLennan Agency.
- Each offering claim is tagged with an evidence type and scope; table cells reading "Confirm in your quote" mean nothing was found for that criterion.
- Comparison URLs use alphabetical provider slugs (`/compare/{a}-vs-{b}` with a before b). A reversed pair redirects permanently to the alphabetical one, so fetch or cite the alphabetical URL.

**Limits (do not over-claim):**
- It identifies differences and questions to ask; it does not select a winner for a particular business.
- "Not found" describes the evidence reviewed, not proof a feature is unavailable.
- 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 in the Sources section; last updated 2026-10-01. Editorial policy: /editorial-policy.

**Related pages:**
- [Heffernan Insurance Brokers vs Marsh McLennan Agency](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency) — parent: all coverage lines for this pair
- [Professional Liability (E&O) Insurance guide](https://spot.insure/coverage/professional-errors-omissions) — coverage explainer for this line
- [Heffernan Insurance Brokers profile](https://spot.insure/insurance-providers/heffernan) — provider profile (evidence)
- [Marsh McLennan Agency profile](https://spot.insure/insurance-providers/marsh-mclennan-agency) — provider profile (evidence)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Builders Risk Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/builders-risk) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Cargo and Transit Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/cargo-transit) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Commercial Auto Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/commercial-auto) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/crime) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/cyber) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/employment-practices) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/fiduciary) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/general-liability) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Surety Bonds](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Workers’ Compensation Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/workers-compensation) — sibling comparison (other line, or other pair for this line)
- [AIG vs Heffernan Insurance Brokers Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-heffernan/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [AIG vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-marsh-mclennan-agency/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Heffernan Insurance Brokers Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-heffernan/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-marsh-mclennan-agency/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Aon vs Heffernan Insurance Brokers Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-heffernan/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Aon vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)

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

Heffernan’s small-business division lists E&O among its coverages and describes a broader buyer base; MMA names E&O alongside distinct lawyer and architect/engineer lines.

## How to Use the Heffernan Insurance Brokers vs Marsh McLennan Agency Professional Liability (E&O) Insurance Comparison

Use this comparison to evaluate Heffernan Insurance Brokers and Marsh McLennan Agency for Professional Liability (E&O) Insurance against the same documented criteria. It identifies differences and questions to confirm; it does not select a winner for a particular business. Offering claims are what each provider publishes about this line unless marked otherwise. “Not found” describes the evidence reviewed, not proof that a feature is unavailable. Confirm the insurer, policy wording, limits, retentions, exclusions and cost in an actual quote.

## Heffernan Insurance Brokers vs Marsh McLennan Agency Professional Liability (E&O) Insurance Summary

Heffernan’s small-business division lists E&O for client financial-loss claims and describes serving sole proprietors through fast-growing firms across several industries; this is division-level, not E&O-specific eligibility. MMA names E&O, A&E and lawyers lines. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")

## What Is Heffernan Insurance Brokers?

Heffernan’s technology practice targets mid- and late-stage, venture-funded and pre-IPO companies; early-stage firms seeking a direct online quote should compare digital providers. It also offers claims consulting and workers’ compensation support. [1](https://www.heffins.com/about-us/our-story/ "Our Story") [2](https://www.heffins.com/business-insurance/technology/ "Technology Company Insurance") [3](https://www.heffins.com/business-insurance/ "Heffernan Business Insurance Brokerage")

[Heffernan Insurance Brokers profile](https://spot.insure/insurance-providers/heffernan)

## 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. [5](https://www.marshmma.com/us/mma/about-us.html "Who We Are") [6](https://www.marshmma.com/us/solutions/small-business.html "Small Business Insurance Solutions")

[Marsh McLennan Agency profile](https://spot.insure/insurance-providers/marsh-mclennan-agency)

## 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. [8](https://www.tdi.texas.gov/commercial/pl-faq.html "FAQ: Professional liability insurance") [9](https://www.iii.org/article/professional-liability-insurance "Professional liability insurance") [10](https://www.sba.gov/counseling/launch-your-business/#business-insurance "Get business insurance") [11](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf "Professional Liability – US Direct Errors and Omissions Insurance")

## What Are the Key Differences Between Heffernan Insurance Brokers and Marsh McLennan Agency Professional Liability (E&O) Insurance?

### Coverage listing and buyer scope

Heffernan’s small-business page lists E&O among its coverages and describes the division as serving sole proprietors through fast-growing firms across industries such as construction, healthcare, hospitality, technology and transportation. That audience statement is division-wide, not an E&O eligibility guarantee. MMA’s source names general E&O alongside A&E and lawyers professional products, giving a buyer separate categories to compare with its occupation. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")

### Line-specific trigger and quote preparation

Heffernan describes E&O as addressing client financial loss from a problem with a company’s product or service and directs small-business buyers to request a quote from the division. MMA’s locator identifies the professional suite by line. Share service descriptions and client contracts with both teams, then ask which carrier form and professional-services definition apply to your specific business. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")

## What Should You Confirm in Heffernan Insurance Brokers and Marsh McLennan Agency Professional Liability (E&O) Insurance Quotes?

- Does Heffernan offer E&O for your specific services and industry, and what client-loss definition applies? [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")
- Which MMA general or specialist line fits the profession and what underwriting information is needed? [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")

## Heffernan Insurance Brokers vs Marsh McLennan Agency Professional Liability (E&O) Compared

| Criteria | Heffernan Professional Errors and Omissions Brokerage | Marsh McLennan Agency professional errors omissions (official overview) |
| --- | --- | --- |
| 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. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; no dedicated professional-E&O product page was found..) | Marsh McLennan Agency describes arranging professional errors omissions for the audience stated on the cited product page. [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") (Evidence: Company-reported; scope: 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..) |
| 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. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: 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..) | Organizations seeking professional liability placement; source does not imply all professions share one policy. [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") (Evidence: Company-reported; scope: 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 | 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. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23; the page does not list specific exclusions, claims-made versus occurrence form, or endorsements..) | 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. [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") (Evidence: Company-reported; scope: 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 reviewed page does not publish limits, retentions, or premium ranges for errors and omissions coverage. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Not publicly disclosed; scope: Small Business Insurance page as read 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. [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") (Evidence: Not publicly disclosed; scope: Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred..) |
| How to Apply | Heffernan directs small-business buyers to contact the firm's small-business division to request a quote and says it will research and build a custom package for industries not already listed. [4](https://www.heffins.com/business-insurance/small-business/ "Small Business Insurance") (Evidence: Company-reported; scope: Small Business Insurance page as read on 2026-09-23..) | 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. [7](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") (Evidence: Company-reported; scope: 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 Heffernan Insurance Brokers vs Marsh McLennan Agency

- [Heffernan Insurance Brokers vs Marsh McLennan Agency](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency): 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.
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Builders Risk Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/builders-risk)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Cargo and Transit Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/cargo-transit)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Commercial Auto Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/commercial-auto)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/commercial-property)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/crime)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/cyber)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/employment-practices)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/fiduciary)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/general-liability)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Surety Bonds](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/surety-bonds)
- [Heffernan Insurance Brokers vs Marsh McLennan Agency Workers’ Compensation Insurance](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/workers-compensation)
- [AIG vs Heffernan Insurance Brokers Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-heffernan/professional-errors-omissions)
- [AIG vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-marsh-mclennan-agency/professional-errors-omissions)
- [Alliance Risk vs Heffernan Insurance Brokers Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-heffernan/professional-errors-omissions)
- [Alliance Risk vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-marsh-mclennan-agency/professional-errors-omissions)
- [Aon vs Heffernan Insurance Brokers Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-heffernan/professional-errors-omissions)
- [Aon vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/professional-errors-omissions)

## Sources for Heffernan Insurance Brokers vs Marsh McLennan Agency

### Sources About Heffernan Insurance Brokers

1. [Our Story](https://www.heffins.com/about-us/our-story/). Heffernan Insurance Brokers; Headquartered in Walnut Creek; nationwide presence; founded 1988; employee owned; niche practices including technology. Accessed 2026-09-16.
2. [Technology Company Insurance](https://www.heffins.com/business-insurance/technology/). Heffernan Insurance Brokers; Pre-IPO and venture-funded heading; mid to late stage specialization; global expansion copy; self-insurance strategies; Key Markets list; Why Heffernan broker history; Joseph Talmadge practice leader; FAQ. Accessed 2026-09-16.
3. [Heffernan Business Insurance Brokerage](https://www.heffins.com/business-insurance/). Heffernan Insurance Brokers; Forward-Thinking Business Insurance: basic coverages (general liability, commercial property and auto, workers’ compensation); corporate and executive protection (EPL, D&O, fiduciary responsibility, cyber, kidnap and ransom); alternative risk capabilities; claims, loss control and risk-management services; industry practice links including Technology and Claims Advocacy. Accessed 2026-09-16.
4. [Small Business Insurance](https://www.heffins.com/business-insurance/small-business/). Heffernan Insurance Brokers; The types of coverage we can provide include... Errors and omissions protects against claims for problems with your product or service that result in a financial loss; industries served list; Specialty Programs; contact for custom-designed packages. Accessed 2026-09-23.

### Sources About Marsh McLennan Agency

5. [Who We Are](https://www.marshmma.com/us/mma/about-us.html). 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.
6. [Small Business Insurance Solutions](https://www.marshmma.com/us/solutions/small-business.html). 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.
7. [Executive and Professional Liability | MMA](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html). 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

8. [FAQ: Professional liability insurance](https://www.tdi.texas.gov/commercial/pl-faq.html). 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.
9. [Professional liability insurance](https://www.iii.org/article/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.
10. [Get business insurance](https://www.sba.gov/counseling/launch-your-business/#business-insurance). U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
11. [Professional Liability – US Direct Errors and Omissions Insurance](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf). 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 2026-10-01. 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.

## Heffernan Insurance Brokers Review Scores for 2026

Review Score: 5.2 / 10 from 1 rated source, equally weighted.

Heffernan’s available review sample is small and local, with a low Google rating for one office. Check the team that would actually serve your business.

- Google reviews (aggregated by Birdeye): Google local listing rating (displayed by Birdeye) 2.6 (5 stars); 5 reviews. Portland office listing at 5100 S Macadam Avenue, matching the official Heffernan locations directory; Birdeye identifies the original review platform as Google. Checked 2026-09-25. [Heffernan Insurance Brokers - Portland reviews](https://reviews.birdeye.com/heffernan-insurance-brokers-144140015138058)

Reviewed 2026-09-25. [Read the sourced review](https://spot.insure/insurance-providers/heffernan/reviews).

## Marsh McLennan Agency Review Scores for 2026

Review Score: 8.2 / 10 from 2 rated sources, equally weighted.

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.

- Trustpilot: TrustScore 3.2 (out of 5); 1 reviews. Trustpilot profile for marshmma.com, MMA's own domain. Unclaimed; MMA has not invited reviews. Period: checked 2026-09-29. Checked 2026-09-29. [marshmma.com Trustpilot profile](https://www.trustpilot.com/review/marshmma.com)
- Trustpilot: TrustScore (Marsh brand) 1.3 (out of 5); 115 reviews. Trustpilot page for marsh.com, the global Marsh brand (mostly individual and non-US customers). This is a different entity from MMA. Period: checked 2026-09-29. Checked 2026-09-29. [Marsh Reviews](https://www.trustpilot.com/review/www.marsh.com)
- BBB: BBB business grade A. BBB San Diego-area profile for Marsh & McLennan Agency LLC (accredited). MMA has separate BBB profiles per office; Dayton and Schaumburg both show A+. Checked 2026-09-29. [Marsh & McLennan Agency LLC (San Diego) BBB](https://www.bbb.org/us/ca/san-diego/profile/insurance-services-office/marsh-mclennan-agency-llc-1126-3000103)
- BBB: Complaints 4. Same San Diego-area profile; zero customer reviews. No client-count denominator. Period: closed in the last three years (checked 2026-09-29). Checked 2026-09-29. [Marsh & McLennan Agency LLC — BBB Complaints](https://www.bbb.org/us/ca/san-diego/profile/insurance-services-office/marsh-mclennan-agency-llc-1126-3000103/complaints); [Marsh & McLennan Agency LLC — BBB Reviews](https://www.bbb.org/us/ca/san-diego/profile/insurance-services-office/marsh-mclennan-agency-llc-1126-3000103/customer-reviews)

Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/marsh-mclennan-agency/reviews).

## Agent and Developer Resources

- [Markdown page](https://spot.insure/compare/heffernan-vs-marsh-mclennan-agency/professional-errors-omissions.md)
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