---
title: "Insureon vs Marsh McLennan Agency: Professional Liability (E&O) Insurance"
description: "Marsh McLennan Agency names specialist professional lines such as architects and engineers and lawyers liability; Insureon describes service-business E&O through an online quote route."
canonical: "https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-10-01"
comparison-pair: "insureon-vs-marsh-mclennan-agency"
provider-a: "insureon"
provider-b: "marsh-mclennan-agency"
coverage-line: "professional-errors-omissions"
---

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

## Agent Guide

**What this page is:** Focused comparison of Insureon 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 Insureon 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:**
- Insureon vs Marsh McLennan Agency for Professional Liability (E&O) Insurance: how do they differ?
- Which is better for Professional Liability (E&O) Insurance, Insureon or Marsh McLennan Agency?
- What does Insureon 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 Insureon or Marsh McLennan Agency?

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: Insureon 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:**
- [Insureon vs Marsh McLennan Agency](https://spot.insure/compare/insureon-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
- [Insureon profile](https://spot.insure/insurance-providers/insureon) — provider profile (evidence)
- [Marsh McLennan Agency profile](https://spot.insure/insurance-providers/marsh-mclennan-agency) — provider profile (evidence)
- [Insureon vs Marsh McLennan Agency Commercial Auto Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/commercial-auto) — sibling comparison (other line, or other pair for this line)
- [Insureon vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Insureon vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/cyber) — sibling comparison (other line, or other pair for this line)
- [Insureon vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/general-liability) — sibling comparison (other line, or other pair for this line)
- [Insureon vs Marsh McLennan Agency Surety Bonds](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/surety-bonds) — sibling comparison (other line, or other pair for this line)
- [Insureon vs Marsh McLennan Agency Workers’ Compensation Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/workers-compensation) — sibling comparison (other line, or other pair for this line)
- [AIG vs Insureon Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-insureon/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 Insureon Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-insureon/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 Insureon Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-insureon/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)

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

Marsh McLennan Agency names specialist professional lines such as architects and engineers and lawyers liability; Insureon describes service-business E&O through an online quote route.

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

Use this comparison to evaluate Insureon 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.

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

Marsh McLennan Agency distinguishes E&O placement from named specialist lines, including architects and engineers and lawyers professional liability. Insureon describes service-business E&O but leaves profession eligibility to the selected carrier. [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes") [6](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")

## What is Insureon?

Insureon describes a small-business insurance agency and broker route with online quote entry and agent support. Its pages market several coverage types, but do not establish which insurer, policy form, state availability, or eligibility applies to a particular buyer. [1](https://www.insureon.com/about-us/how-insureon-works "How Insureon Works") [2](https://www.insureon.com/small-business-insurance/general-liability "General Liability Insurance - Get Online Quotes")

[Insureon profile](https://spot.insure/insurance-providers/insureon)

## 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. [4](https://www.marshmma.com/us/mma/about-us.html "Who We Are") [5](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. [7](https://www.tdi.texas.gov/commercial/pl-faq.html "FAQ: Professional liability insurance") [8](https://www.iii.org/article/professional-liability-insurance "Professional liability insurance") [9](https://www.sba.gov/counseling/launch-your-business/#business-insurance "Get business insurance") [10](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf "Professional Liability – US Direct Errors and Omissions Insurance")

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

### When a Specialist Form Applies

Marsh McLennan Agency’s reviewed page presents professional liability as a set of placements and names specialist lines for architects and engineers and lawyers rather than one universal form. Insureon describes E&O for service businesses, with specific professions and carrier appetite determined through the application. A licensed firm should ask whether a specialty form is required; a company with several professional services should have Insureon identify how the carrier classifies each one. [6](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes")

### Profession-Specific Wording

The Marsh McLennan Agency overview describes E&O and those named specialist lines but does not treat them as a single form or set universal terms. Insureon’s overview also leaves detailed terms to the quote. Ask each adviser which professional-services definition and policy wording is proposed for your profession, and whether a separate specialty policy is needed. [6](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes")

### Adviser-Led Placement

Marsh McLennan Agency invites organizations to contact an adviser or specialist, while Insureon offers an online quote request. Neither reviewed page publishes universal limits or an issuing insurer for a particular account. Compare named insurers, forms, limits, retentions, and exclusions in the actual proposals. [6](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes")

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

- Does the account require a specialist architects-and-engineers or lawyers form, or another professional liability placement? [6](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")
- What professional-services definition, issuing insurer, limits, and exclusions appear in the adviser-led and online proposals?  [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes")

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

| Criteria | Insureon Professional Liability / E&O Insurance | Marsh McLennan Agency professional errors omissions (official overview) |
| --- | --- | --- |
| Role in This Line | Insureon markets Professional Liability, also called Errors & Omissions, through its small-business quote channel. [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes") (Evidence: Company-reported; scope: Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents..) | Marsh McLennan Agency describes arranging professional errors omissions for the audience stated on the cited product page. [6](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 | The page addresses service businesses exposed to client claims; the eligible professions and carrier appetite depend on the application and quote. [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes") (Evidence: Company-reported; scope: Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents..) | Organizations seeking professional liability placement; source does not imply all professions share one policy. [6](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 | The page describes client claims over alleged mistakes or unsatisfactory professional work; it does not establish policy-specific retroactive dates, exclusions or limits. [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes") (Evidence: Company-reported; scope: Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents..) | 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. [6](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 cited public overview does not establish the limits, deductibles, exclusions or form terms that would apply to a specific buyer. [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes") (Evidence: Not publicly disclosed; scope: Ask for the quote and specimen or issued policy forms before treating a listed feature as covered..) | 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. [6](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 | The cited Insureon product page provides an online quote request path; that route does not identify the insurer or guarantee that a quote will be offered or bound. [3](https://www.insureon.com/small-business-insurance/professional-liability "Professional Liability Insurance - Get Online Quotes") (Evidence: Company-reported; scope: Insureon’s public marketing page and quote route documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents..) | 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. [6](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 Insureon vs Marsh McLennan Agency

- [Insureon vs Marsh McLennan Agency](https://spot.insure/compare/insureon-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.
- [Insureon vs Marsh McLennan Agency Commercial Auto Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/commercial-auto)
- [Insureon vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/commercial-property)
- [Insureon vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/cyber)
- [Insureon vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/general-liability)
- [Insureon vs Marsh McLennan Agency Surety Bonds](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/surety-bonds)
- [Insureon vs Marsh McLennan Agency Workers’ Compensation Insurance](https://spot.insure/compare/insureon-vs-marsh-mclennan-agency/workers-compensation)
- [AIG vs Insureon Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-insureon/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 Insureon Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-insureon/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 Insureon Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-insureon/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 Insureon vs Marsh McLennan Agency

### Sources About Insureon

1. [How Insureon Works](https://www.insureon.com/about-us/how-insureon-works). Insureon; Agent/broker and carrier roles (L82-88); application and advertised quote/payment route (L89-97); human support (L98-101). Accessed 2026-09-28.
2. [General Liability Insurance - Get Online Quotes](https://www.insureon.com/small-business-insurance/general-liability). Insureon; Coverage/product overview; illustrative third-party claims; quote CTA.. Accessed 2026-09-29.
3. [Professional Liability Insurance - Get Online Quotes](https://www.insureon.com/small-business-insurance/professional-liability). Insureon; Product definition L67-L89; quote CTA and target users on page.. Accessed 2026-09-29.

### Sources About Marsh McLennan Agency

4. [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.
5. [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.
6. [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

7. [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.
8. [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.
9. [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.
10. [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.

## Insureon Review Scores for 2026

Review Score: 5.8 / 10 from 4 rated sources, equally weighted.

Insureon's ratings are split. Trustpilot shows 4.5 out of 5 from 2,401 reviews, while ConsumerAffairs shows 1.0 from 344.

- Trustpilot: TrustScore 4.5 (out of 5); 2401 reviews. Insureon's own Trustpilot profile (claimed since 2014), checked 2026-09-29. Reviews are collected by Insureon, so they are not a random sample. Period: all time; 548 in the prior 12 months (checked 2026-09-29). Checked 2026-09-29. [Insureon Reviews | Trustpilot](https://www.trustpilot.com/review/www.insureon.com)
- ConsumerAffairs: Displayed listing rating 1.0 (out of 5); 344 reviews. Insureon listing on ConsumerAffairs, page updated 2026-08-14 (read in an earlier pass; the numbers were not re-confirmed on the latest check). Period: page updated 2026-08-14. Checked 2026-09-29. [Insureon Reviews (From First-hand Experiences)](https://www.consumeraffairs.com/insurance/insureon.html)
- BBB: BBB business grade A+. BBB Chicago/Northern Illinois profile for Insureon; BBB Accredited since 2025-08-29. Checked 2026-09-29. [Insureon | BBB Business Profile](https://www.bbb.org/us/il/chicago/profile/commercial-insurance-services/insureon-0654-88589675)
- BBB: Customer-review rating 1 (out of 5); 2 reviews. Two self-selected customer reviews on the BBB profile (read earlier; the 2 count was reconfirmed 2026-09-29). Period: BBB profile checked 2026-09-29. Checked 2026-09-29. [Insureon | BBB Reviews](https://www.bbb.org/us/il/chicago/profile/commercial-insurance-services/insureon-0654-88589675/customer-reviews)
- BBB: Complaints 6. BBB complaint list for Insureon; no policy-volume denominator. Period: closed in the last three years (BBB, 2026-09-29). Checked 2026-09-29. [Insureon | BBB Complaints](https://www.bbb.org/us/il/chicago/profile/commercial-insurance-services/insureon-0654-88589675/complaints)

Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/insureon/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/insureon-vs-marsh-mclennan-agency/professional-errors-omissions.md)
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