---
title: "Aon vs Marsh McLennan Agency: Commercial Property Insurance"
description: "Aon describes catastrophe modeling and a property risk analyzer; Marsh McLennan Agency invites buyers to discuss industry-specific property placement with an adviser."
canonical: "https://spot.insure/compare/aon-vs-marsh-mclennan-agency/commercial-property"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "aon-vs-marsh-mclennan-agency"
provider-a: "aon"
provider-b: "marsh-mclennan-agency"
coverage-line: "commercial-property"
---

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[Human-readable page](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/commercial-property)

## Agent Guide

**What this page is:** Focused comparison of Aon and Marsh McLennan Agency for Commercial Property 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 Commercial Property Insurance questions about Aon 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:**
- Aon vs Marsh McLennan Agency for Commercial Property Insurance: how do they differ?
- Which is better for Commercial Property Insurance, Aon or Marsh McLennan Agency?
- What does Aon or Marsh McLennan Agency publish about Commercial Property Insurance (limits, eligibility, claims, add-ons)?
- What should I confirm in a quote for Commercial Property Insurance from Aon or Marsh McLennan Agency?

**Key facts:**
- Line: Commercial Property Insurance. Providers: Aon 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 2026-09-30. Editorial policy: /editorial-policy.

**Related pages:**
- [Aon vs Marsh McLennan Agency](https://spot.insure/compare/aon-vs-marsh-mclennan-agency) — parent: all coverage lines for this pair
- [Commercial Property Insurance guide](https://spot.insure/coverage/commercial-property) — coverage explainer for this line
- [Aon profile](https://spot.insure/insurance-providers/aon) — provider profile (evidence)
- [Marsh McLennan Agency profile](https://spot.insure/insurance-providers/marsh-mclennan-agency) — provider profile (evidence)
- [Aon vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/crime) — sibling comparison (other line, or other pair for this line)
- [Aon vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/cyber) — sibling comparison (other line, or other pair for this line)
- [Aon vs Marsh McLennan Agency D&O Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/directors-officers) — sibling comparison (other line, or other pair for this line)
- [Aon vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/employment-practices) — sibling comparison (other line, or other pair for this line)
- [Aon vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/fiduciary) — sibling comparison (other line, or other pair for this line)
- [Aon vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/general-liability) — sibling comparison (other line, or other pair for this line)
- [Aon vs Marsh McLennan Agency Kidnap and Ransom Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/kidnap-ransom) — 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)
- [Aon vs Marsh McLennan Agency Workers’ Compensation Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/workers-compensation) — sibling comparison (other line, or other pair for this line)
- [AIG vs Aon Commercial Property Insurance](https://spot.insure/compare/aig-vs-aon/commercial-property) — sibling comparison (other line, or other pair for this line)
- [AIG vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/aig-vs-marsh-mclennan-agency/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Aon Commercial Property Insurance](https://spot.insure/compare/alliance-risk-vs-aon/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/alliance-risk-vs-marsh-mclennan-agency/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Aon vs The Baldwin Group Commercial Property Insurance](https://spot.insure/compare/aon-vs-baldwin/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Aon vs Beazley Commercial Property Insurance](https://spot.insure/compare/aon-vs-beazley/commercial-property) — sibling comparison (other line, or other pair for this line)

# Aon vs Marsh McLennan Agency: How Do They Compare for Commercial Property Insurance?

Aon describes catastrophe modeling and a property risk analyzer; Marsh McLennan Agency invites buyers to discuss industry-specific property placement with an adviser.

## Research Scope and Use

Use this comparison to evaluate Aon and Marsh McLennan Agency for Commercial Property 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.

## Summary

Marsh McLennan Agency offers adviser-led property placement, while Aon describes property brokerage with catastrophe modeling and risk analytics. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") [6](https://www.marshmma.com/us/solutions/property.html "Property Insurance | MMA")

## What Is Aon?

Aon’s U.S. Commercial Risk terms describe brokerage for certain insurance programs, while its Middle Market page describes a dedicated practice for mid-sized organizations across North America. The public materials reviewed do not identify the licensed producer or insurer for a particular placement. Ask which entity will produce each line and which insurer will issue the policy; request jurisdiction details for the proposed placement and ask how compensation and claim notice work for your account. [1](https://www.aon.com/en/about/leadership-and-governance/brokerage-terms-of-service-for-commercial-risk-solutions-us "Commercial Risk Solutions U.S. Brokerage Terms of Service") [2](https://www.aon.com/en/capabilities/middle-market-clients "Middle Market Clients")

[Aon profile](https://spot.insure/insurance-providers/aon)

## 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 Commercial Property Insurance?

Commercial property may fit your business if you own a building or rely on equipment and stock. Compare replacement-cost terms, deductibles and any coinsurance condition, and check lost-income protection separately. [7](https://www.insurance.ca.gov/01-consumers/105-type/95-guides/09-comm/commercialguide.cfm "Commercial Insurance Guide") [8](https://content.naic.org/cipr-topics/business-interruptionbusinessowners-policies-bop "Business Interruption Insurance/Businessowner’s Policies (BOP)") [9](https://www.tdi.texas.gov/pubs/consumer/cb021.html "Commercial property insurance guide")

## Key Differences in Commercial Property Insurance

### Risk Analysis Services

Aon describes catastrophe modeling, risk control, claims advocacy, and its U.S.-available Property Risk Analyzer. Marsh McLennan Agency’s reviewed record describes industry-tailored property placement but does not list comparable modeling tools. Ask the MMA adviser about analytics for your locations and ask Aon what property schedule and assumptions its analysis will use. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") [6](https://www.marshmma.com/us/solutions/property.html "Property Insurance | MMA")

### Placement Questions

Marsh McLennan Agency invites organizations to contact an adviser or specialist to discuss property placement; Aon says brokers build property programs with insurance carriers. Neither record names the insurer for a buyer's specific placement. Request the proposed markets and written terms from each broker before evaluating price or breadth. [6](https://www.marshmma.com/us/solutions/property.html "Property Insurance | MMA") [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management")

### Property Terms

Marsh McLennan Agency describes coverage tailored to industry and stated property risks, while Aon describes buildings, contents, and inventory exposed to events such as fire, natural catastrophe, theft, and vandalism, with possible business interruption. These summaries do not establish policy wording, so compare actual causes of loss, valuation, and interruption language. [6](https://www.marshmma.com/us/solutions/property.html "Property Insurance | MMA") [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management")

## What to Confirm in Commercial Property Insurance Quotes

- Which industry and property-class terms will the MMA adviser place, and who is the carrier?
- What exact perils, valuation, and interruption trigger will Aon’s proposed forms use?

## Offering Details

| Criteria | Aon Commercial Property brokerage and risk-advisory offering | Marsh McLennan Agency commercial property (official overview) |
| --- | --- | --- |
| Role in This Line | Aon describes property brokerage and consulting and says brokers work with insurance carriers to build a property program. Aon is marketing a brokered placement and risk-management service; the page does not name the insurer for an individual placement. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") (Evidence: Company-reported; scope: Aon’s official global product/capability page. The statement is limited to Aon’s marketing of brokerage or advisory services, not policy issuance..) | Marsh McLennan Agency describes arranging commercial property for the audience stated on the cited product page. [6](https://www.marshmma.com/us/solutions/property.html "Property Insurance | MMA") (Evidence: Company-reported; scope: commercial property 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 reviewed page does not identify the insurer or the legal producing entity for a specific placement. Ask Aon to identify both for the quoted risk. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") (Evidence: Not found in reviewed sources; scope: Aon’s global product/capability page reviewed 2026-09-30; no buyer quote, binder or policy was reviewed. This does not establish that no insurer or producing entity is available..) | Confirm in your quote. |
| Who It’s For | Aon describes property-risk services for organizations seeking to protect property, buildings, contents and inventory. Its page is a global capability description and does not define an applicant eligibility schedule. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") (Evidence: Company-reported; scope: Audience stated by Aon on its global capability page; this does not establish a specific applicant’s eligibility or placement availability by U.S. state..) | Commercial property organizations; exact property classes and terms are set through placement. [6](https://www.marshmma.com/us/solutions/property.html "Property Insurance | MMA") (Evidence: Company-reported; scope: commercial property 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 | Aon describes commercial property insurance as protection against loss of property, buildings and contents or inventory from perils such as fire, natural catastrophe, theft and vandalism; it says insurance can also provide business-interruption coverage after property damage. These are general descriptions, not terms of a buyer’s policy. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") (Evidence: Company-reported; scope: Aon’s broker-authored explanation of the insurance line. It does not establish an individual insured’s policy entitlement; the insurer’s form, endorsements and declarations control..) | The cited product page describes commercial property insurance tailored to an organization's industry and stated property risks. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. [6](https://www.marshmma.com/us/solutions/property.html "Property Insurance | MMA") (Evidence: Company-reported; scope: commercial property 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 state a standard buyer-specific limit, retention or deductible for this placement. Confirm amounts, sublimits and conditions in the quote and issued policy. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") (Evidence: Not publicly disclosed; scope: Aon’s global product/capability page reviewed 2026-09-30; no buyer quote or policy form was reviewed..) | 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/property.html "Property Insurance | 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..) |
| Risk Services | Aon describes property brokerage and consulting for business interruption, captive integration, claims advocacy, catastrophe modeling, risk control and terrorism/crisis management. Its US-available Property Risk Analyzer models potential losses and insurance program options; tool availability does not establish placement availability. [3](https://www.aon.com/en/capabilities/risk-management/property-risk-management "Property Risk Management") (Evidence: Company-reported; scope: Company-reported brokerage and advisory services. Account-specific service terms are not stated..) | Confirm in your quote. |
| How to Apply | Confirm in your quote. | 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/property.html "Property Insurance | MMA") (Evidence: Company-reported; scope: commercial property 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..) |

## Full Comparison

- [Aon vs Marsh McLennan Agency](https://spot.insure/compare/aon-vs-marsh-mclennan-agency): all coverage lines, business roles, service and claims.
- [What Is Commercial Property Insurance?](https://spot.insure/coverage/commercial-property): Commercial property insurance can protect buildings, equipment and inventory, while valuation, deductibles, exclusions and income protection affect your cost after a loss.
- [Aon vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/crime)
- [Aon vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/cyber)
- [Aon vs Marsh McLennan Agency D&O Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/directors-officers)
- [Aon vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/employment-practices)
- [Aon vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/fiduciary)
- [Aon vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/general-liability)
- [Aon vs Marsh McLennan Agency Kidnap and Ransom Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/kidnap-ransom)
- [Aon vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/professional-errors-omissions)
- [Aon vs Marsh McLennan Agency Workers’ Compensation Insurance](https://spot.insure/compare/aon-vs-marsh-mclennan-agency/workers-compensation)
- [AIG vs Aon Commercial Property Insurance](https://spot.insure/compare/aig-vs-aon/commercial-property)
- [AIG vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/aig-vs-marsh-mclennan-agency/commercial-property)
- [Alliance Risk vs Aon Commercial Property Insurance](https://spot.insure/compare/alliance-risk-vs-aon/commercial-property)
- [Alliance Risk vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/alliance-risk-vs-marsh-mclennan-agency/commercial-property)
- [Aon vs The Baldwin Group Commercial Property Insurance](https://spot.insure/compare/aon-vs-baldwin/commercial-property)
- [Aon vs Beazley Commercial Property Insurance](https://spot.insure/compare/aon-vs-beazley/commercial-property)

## Sources

### Aon

1. [Commercial Risk Solutions U.S. Brokerage Terms of Service](https://www.aon.com/en/about/leadership-and-governance/brokerage-terms-of-service-for-commercial-risk-solutions-us). Aon; Lines 120–127: certain-program broker-of-record scope, consultation, application assistance, client signature and bind instruction, and account administration; lines 140–147: variable and contingent compensation, potential placement incentive, and client request route; lines 206–213: no price guarantee and surplus-lines limitations; lines 229–231: client insurer-notice duty unless separately agreed.. Accessed 2026-09-29.
2. [Middle Market Clients](https://www.aon.com/en/capabilities/middle-market-clients). Aon; Lines 125–132: mid-sized organizations and middle-market framing; lines 165–173: dedicated practice and North America statement; lines 188–224: Commercial Risk capabilities. No numeric company-size cutoff or U.S.-only eligibility rule is stated on the reviewed page.. Accessed 2026-09-29.
3. [Property Risk Management](https://www.aon.com/en/capabilities/risk-management/property-risk-management). Aon; Commercial property description and risk advisory approach, lines 123–140; risk modeling, benchmarking, claims support, risk analyzer and global market access, lines 146–168; contact link at top.. Accessed 2026-09-30.

### 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. [Property Insurance | MMA](https://www.marshmma.com/us/solutions/property.html). Marsh McLennan Agency; Commercial property insurance tailored to industry and unique risks; property page sections.. Accessed 2026-09-30.

### Commercial Property Insurance Guide

7. [Commercial Insurance Guide](https://www.insurance.ca.gov/01-consumers/105-type/95-guides/09-comm/commercialguide.cfm). California Department of Insurance; What Should I Expect from a Broker-Agent; Commercial Property: Coverage Sections, Limits of Insurance, and Coinsurance; Covered Causes of Loss; Valuation Types; Inland Marine. Accessed 2026-09-16.
8. [Business Interruption Insurance/Businessowner’s Policies (BOP)](https://content.naic.org/cipr-topics/business-interruptionbusinessowners-policies-bop). National Association of Insurance Commissioners; Background; Commercial Property and Business Interruption bullets. Accessed 2026-09-16.
9. [Commercial property insurance guide](https://www.tdi.texas.gov/pubs/consumer/cb021.html). Texas Department of Insurance; Introduction; Coverage options; Shopping for commercial property insurance; Saving money on your insurance. Accessed 2026-09-16.

Updated 2026-09-30. 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.

## Aon Reviews

Review Score: 6.1 / 10 from 3 rated sources, equally weighted.

Public ratings for Aon are low: Trustpilot shows 1.2 out of 5 from 782 reviews, and BBB shows 1.6 from five. Aon is a global firm, so those pages mostly reflect other parts of the business, not large U.S. commercial accounts.

- J.D. Power: Aon study score 822 (out of 1000). Historical 2017 large-commercial-broker study; U.S. and Canada commercial insurance decision-makers at large organizations. J.D. Power reports 2,506 evaluations across the study, not Aon-specific responses; the Aon respondent count is not stated. Period: 2017 study; ranked 3rd among large commercial brokers; study-wide population 2,506, not Aon review count. Checked 2026-09-29. [Diversity of Offerings Becomes Key Differentiator for Large Commercial Insurers, JD Power Finds](https://www.jdpower.com/business/press-releases/jd-power-2017-large-commercial-insurance-study)
- Trustpilot: TrustScore 1.2 (out of 5); 782 reviews. Global www.aon.com profile merged with other Aon profiles; mixed experiences include pensions, travel, professional indemnity and Australian business quotation service. The two latter complaints are individual unverified allegations, not evidence of U.S. commercial-placement outcomes or insurer fault. Trustpilot says reviews may not be representative because the company has not recently invited reviews. Period: Displayed 2026-09-29; page separately showed 198 reviews in the last 12 months. Checked 2026-09-29. [Aon Reviews](https://www.trustpilot.com/review/www.aon.com)
- BBB: BBB business grade B− (BBB letter grade; stated reason: failure to respond to two filed complaints). BBB of Chicago & Northern Illinois profile for Aon plc; the business grade is BBB’s own measure, not customer stars. Checked 2026-09-29. [Aon plc | BBB Business Profile](https://www.bbb.org/us/il/chicago/profile/insurance-companies/aon-plc-0654-5291)
- BBB: BBB customer review average 1.6 (out of 5); 5 reviews. BBB of Chicago & Northern Illinois customer reviews for Aon plc; some reviews are about employee-benefit and medical-expense issues. Period: checked 2026-09-29. Checked 2026-09-29. [Aon plc | BBB Reviews](https://www.bbb.org/us/il/chicago/profile/insurance-companies/aon-plc-0654-5291/customer-reviews)

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

## Marsh McLennan Agency Reviews

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/aon-vs-marsh-mclennan-agency/commercial-property.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)