---
title: "Gallagher vs Marsh McLennan Agency: Cyber Insurance"
description: "Gallagher separates first- and third-party cyber losses and describes additional services for larger accounts; Marsh McLennan Agency does not detail coverage or service on its overview."
canonical: "https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/cyber"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "gallagher-vs-marsh-mclennan-agency"
provider-a: "gallagher"
provider-b: "marsh-mclennan-agency"
coverage-line: "cyber"
---

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[Human-readable page](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/cyber)

## Agent Guide

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

**Key facts:**
- Line: Cyber Insurance. Providers: Gallagher 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:**
- [Gallagher vs Marsh McLennan Agency](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency) — parent: all coverage lines for this pair
- [Cyber Insurance guide](https://spot.insure/coverage/cyber) — coverage explainer for this line
- [Gallagher profile](https://spot.insure/insurance-providers/gallagher) — provider profile (evidence)
- [Marsh McLennan Agency profile](https://spot.insure/insurance-providers/marsh-mclennan-agency) — provider profile (evidence)
- [Gallagher vs Marsh McLennan Agency Commercial Auto Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/commercial-auto) — sibling comparison (other line, or other pair for this line)
- [Gallagher vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Gallagher vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/crime) — sibling comparison (other line, or other pair for this line)
- [Gallagher vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/employment-practices) — sibling comparison (other line, or other pair for this line)
- [Gallagher vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/fiduciary) — sibling comparison (other line, or other pair for this line)
- [Gallagher vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/general-liability) — sibling comparison (other line, or other pair for this line)
- [AIG vs Gallagher Cyber Insurance](https://spot.insure/compare/aig-vs-gallagher/cyber) — sibling comparison (other line, or other pair for this line)
- [AIG vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/aig-vs-marsh-mclennan-agency/cyber) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Gallagher Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-gallagher/cyber) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-marsh-mclennan-agency/cyber) — sibling comparison (other line, or other pair for this line)
- [Amelia Risk vs Gallagher Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-gallagher/cyber) — sibling comparison (other line, or other pair for this line)
- [Amelia Risk vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-marsh-mclennan-agency/cyber) — sibling comparison (other line, or other pair for this line)

# Gallagher vs Marsh McLennan Agency: How Do They Compare for Cyber Insurance?

Gallagher separates first- and third-party cyber losses and describes additional services for larger accounts; Marsh McLennan Agency does not detail coverage or service on its overview.

## Research Scope and Use

Use this comparison to evaluate Gallagher and Marsh McLennan Agency for Cyber 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

Gallagher separates first- and third-party cyber losses and describes additional services for larger accounts; Marsh McLennan Agency does not detail coverage or service on its overview. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA")

## What Is Gallagher?

Gallagher’s technology specialists serve startups through global enterprises, while its executive-risk team supports IPO and M&A needs; small firms seeking one simple digital quote should compare online agencies. [1](https://www.ajg.com/industries/technology-insurance/ "Technology Insurance") [2](https://www.gallaghersmallbusiness.com/technology-services/ "Insurance for Technology & IT Businesses") [3](https://www.ajg.com/insurance/executive-and-financial-risk-insurance/ "Executive and Financial Risk Insurance") [4](https://www.gallaghersmallbusiness.com/legal-information/ "Legal Information") [5](https://www.ajg.com/merger-partners/woodruff-sawyer-is-now-gallagher/ "Woodruff Sawyer Is Now Gallagher")

[Gallagher profile](https://spot.insure/insurance-providers/gallagher)

## 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. [8](https://www.marshmma.com/us/mma/about-us.html "Who We Are") [9](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 Cyber Insurance?

Cyber insurance can help pay covered response costs and claims against your business after a cyber incident. If your business relies on data, software or outside providers, compare response limits, vendor outages and approval rules. [11](https://www.ftc.gov/business-guidance/small-businesses/cybersecurity/cyber-insurance "Cyber Insurance") [12](https://www.aig.com/content/dam/aig/america-canada/us/documents/business/cyber/cyberedge-wording-sample-specimen-form.pdf "CyberEdge specimen policy")

## Key Differences in Cyber Insurance

### Coverage and Audience

Gallagher says cyber may cover a business’s own technology and data breach costs as first-party losses, and customer claims as third-party losses, including notification, credit monitoring, legal fees and regulatory fines. Marsh McLennan Agency describes cyber liability and risk strategy without itemizing those categories. Ask Marsh McLennan Agency which costs are paid directly to the business and which address third-party claims. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA")

### Eligibility and Risk Review

Gallagher recommends cyber to small businesses handling customer data or electronic payments and names retail, healthcare, finance and home repair. For larger accounts, it offers eRiskHub and a claims team that includes forensic accountants; the small-business page does not describe equivalent services. Marsh McLennan Agency’s page names neither segments nor services, so confirm what account tier and support it offers. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA")

### Application and Support

Gallagher arranges policies with outside carriers and does not underwrite. Marsh McLennan Agency describes placement through an adviser. Gallagher’s small-business team also notes social-engineering and deepfake risks as evolving threats. Ask Marsh McLennan Agency which carrier and security controls shape underwriting. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA")

## What to Confirm in Cyber Insurance Quotes

- For Gallagher, ask whether eRiskHub and forensic-accountant support apply to your account size. Ask Marsh McLennan Agency for first- and third-party grants, regulatory fine terms and included response services. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA")

## Offering Details

| Criteria | Gallagher Cyber Liability Insurance | Marsh McLennan Agency cyber (official overview) |
| --- | --- | --- |
| Role in This Line | Gallagher Small Business arranges cyber liability coverage with outside carriers for small businesses; Gallagher's group-level practice separately places cyber coverage with its own risk-consulting services for larger accounts. Gallagher does not underwrite either policy. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [7](https://www.ajg.com/insurance/cyber-liability-insurance/ "Cyber Liability Insurance") (Evidence: Company-reported; scope: Small-business cyber product page and the group-level cyber liability page..) | Marsh McLennan Agency describes arranging cyber for the audience stated on the cited product page. [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA") (Evidence: Company-reported; scope: cyber 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 | Neither the small-business cyber page nor the group-level cyber liability page names the insurer that would issue a given client's policy. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [7](https://www.ajg.com/insurance/cyber-liability-insurance/ "Cyber Liability Insurance") (Evidence: Not publicly disclosed; scope: Checked both pages on 2026-09-23..) | Confirm in your quote. |
| Who It’s For | Gallagher recommends this coverage for small businesses that handle customer data or accept credit card or electronic-funds-transfer payments, and specifically names retail, healthcare, financial services and home-repair businesses as frequent attack targets. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") (Evidence: Company-reported; scope: Small-business cyber product page "Who needs Cyber Liability Insurance" section; actual acceptance depends on underwriting..) | Organizations managing cyber exposure; exact insurer, policy form, and eligibility are placement-specific. [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA") (Evidence: Company-reported; scope: cyber marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement..) |
| Coverage Features | Gallagher describes two components of cyber coverage: first-party coverage for when a business's own technology or data is breached, and third-party coverage for when a customer sues the business for failing to prevent a breach. It says the policy can cover customer notification, credit monitoring, legal fees and regulatory fines. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") (Evidence: Company-reported; scope: Small-business cyber product page; a coverage description, not a specific policy's insuring agreement or exclusions..)<br><br>Gallagher's small-business team says cyber insurance rates are flat to down due to competitive market forces despite high-profile losses, and flags generative-AI-driven risks such as more convincing phishing, social-engineering and deepfake attacks as an emerging concern. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") (Evidence: Company-reported; scope: Small-business cyber product page market-commentary section; a general market view, not a quote for any specific business..) | The cited product page describes cyber liability and a cyber-risk management strategy as part of the executive and professional risk offering. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA") (Evidence: Company-reported; scope: cyber 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 | Neither page publishes specific cyber coverage limits, retentions or premium ranges; the small-business page's $60 million claim example is an illustrative scenario, not a stated policy limit. [6](https://www.gallaghersmallbusiness.com/insurance-products/cyber/ "Cyber Liability Insurance: What is it? Who Needs It?") [7](https://www.ajg.com/insurance/cyber-liability-insurance/ "Cyber Liability Insurance") (Evidence: Not publicly disclosed; scope: Checked both pages 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. [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | 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 | For larger accounts, Gallagher's group-level cyber practice gives clients access to the Gallagher eRiskHub risk-management portal and a dedicated claims team that includes cyber forensic accountants; the small-business product page does not describe an equivalent service for that segment. [7](https://www.ajg.com/insurance/cyber-liability-insurance/ "Cyber Liability Insurance") (Evidence: Company-reported; scope: Group-level cyber liability page; not confirmed as included with the small-business product..) | 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. [10](https://www.marshmma.com/us/solutions/cyber.html "Cyber | MMA") (Evidence: Company-reported; scope: cyber 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

- [Gallagher vs Marsh McLennan Agency](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency): all coverage lines, business roles, service and claims.
- [What Is Cyber Insurance?](https://spot.insure/coverage/cyber): Cyber insurance can help pay covered breach response, data recovery, interruption and liability costs; vendor incidents and funds-transfer fraud need separate checks.
- [Gallagher vs Marsh McLennan Agency Commercial Auto Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/commercial-auto)
- [Gallagher vs Marsh McLennan Agency Commercial Property Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/commercial-property)
- [Gallagher vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/crime)
- [Gallagher vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/employment-practices)
- [Gallagher vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/fiduciary)
- [Gallagher vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/gallagher-vs-marsh-mclennan-agency/general-liability)
- [AIG vs Gallagher Cyber Insurance](https://spot.insure/compare/aig-vs-gallagher/cyber)
- [AIG vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/aig-vs-marsh-mclennan-agency/cyber)
- [Alliance Risk vs Gallagher Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-gallagher/cyber)
- [Alliance Risk vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/alliance-risk-vs-marsh-mclennan-agency/cyber)
- [Amelia Risk vs Gallagher Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-gallagher/cyber)
- [Amelia Risk vs Marsh McLennan Agency Cyber Insurance](https://spot.insure/compare/amelia-risk-vs-marsh-mclennan-agency/cyber)

## Sources

### Gallagher

1. [Technology Insurance](https://www.ajg.com/industries/technology-insurance/). Gallagher; Introduction; Solutions and coverages for the technology industry: Technology errors and omissions including cyber, Intellectual property insurance, Product liability, Employee benefits; Data-driven insights; global network. Accessed 2026-09-16.
2. [Insurance for Technology & IT Businesses](https://www.gallaghersmallbusiness.com/technology-services/). Gallagher Small Business; Protection for IT Professionals & Their Technology-Based Businesses; recommended coverage menu, including Surety Bond Programs; Connect With An Advisor. Accessed 2026-09-16.
3. [Executive and Financial Risk Insurance](https://www.ajg.com/insurance/executive-and-financial-risk-insurance/). Gallagher; Opening (insurance broking and placement); three key services; Directors and Officers; IPO and direct listings; Employment Practices; Fiduciary; Employee Dishonesty (Crime) and Fidelity Bond; Kidnap, Ransom and Extortion; M&A Transactional Insurance. Accessed 2026-09-16.
4. [Legal Information](https://www.gallaghersmallbusiness.com/legal-information/). Gallagher Small Business; Producer identification immediately above Quick Links. Accessed 2026-09-16.
5. [Woodruff Sawyer Is Now Gallagher](https://www.ajg.com/merger-partners/woodruff-sawyer-is-now-gallagher/). Gallagher; Opening; Executive and Financial Risk consulting; Continued access to client portals; contact form. Accessed 2026-09-16.
6. [Cyber Liability Insurance: What is it? Who Needs It?](https://www.gallaghersmallbusiness.com/insurance-products/cyber/). Gallagher Small Business; What is Cyber Insurance?; Do you need cyber liability insurance?; Types of Cyber Liability Insurance (first-party and third-party); Who needs Cyber Liability Insurance; Cyber market trends; Consider this Cyber Liability Insurance claim example. Accessed 2026-09-23.
7. [Cyber Liability Insurance](https://www.ajg.com/insurance/cyber-liability-insurance/). Gallagher; Protect your business from cyber threats; We help you prevent, mitigate, manage and recover from a cybersecurity incident: Cyber exposure preparation, Insurance process preparation, Prevention and ongoing cyber risk management, Claims advocacy; Gallagher eRiskHub; dedicated claims team with cyber forensic accountants. Accessed 2026-09-23.

### Marsh McLennan Agency

8. [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.
9. [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.
10. [Cyber | MMA](https://www.marshmma.com/us/solutions/cyber.html). Marsh McLennan Agency; Cyber solution overview and cyber-risk services.. Accessed 2026-09-30.

### Cyber Insurance Guide

11. [Cyber Insurance](https://www.ftc.gov/business-guidance/small-businesses/cybersecurity/cyber-insurance). Federal Trade Commission; Opening; First-Party and Third-Party Coverage; First-Party Coverage; Third-Party Coverage; What Should Your Cyber Insurance Policy Cover. Accessed 2026-09-16.
12. [CyberEdge specimen policy](https://www.aig.com/content/dam/aig/america-canada/us/documents/business/cyber/cyberedge-wording-sample-specimen-form.pdf). AIG; General Terms §§4–6, PDF pp.3–6; Security and Privacy §1 p.11, §2(l)/(p) p.14, §3 pp.15–18, exclusions p.18; Event Management §1 and §2(h), PDF pp.19–20. 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.

## Gallagher Reviews

Review Score: 9.3 / 10 from 3 rated sources, equally weighted.

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

- J.D. Power: Broker satisfaction rank/score 2nd / 855 (Rank / 1,000-point score). 2017 US/Canada large-commercial broker study; participating organizations had at least $100m annual revenue or operating budget; not small-business-specific. Period: 2017 study. Checked 2026-09-25. [JD Power 2017 Large Commercial Insurance Study](https://www.jdpower.com/business/press-releases/jd-power-2017-large-commercial-insurance-study)
- Trustpilot: TrustScore 4.6 (5 stars); 8190 reviews. Global Arthur J. Gallagher & Co. brand profile; mixed countries and insurance lines, not US commercial-only. Period: 976 reviews in prior 12 months; observed 2026-09-25. Checked 2026-09-25. [Gallagher Reviews | Trustpilot](https://www.trustpilot.com/review/www.ajg.com)
- BBB: BBB grade A+ (BBB letter grade). BBB corporate headquarters profile for Gallagher, Rolling Meadows, Illinois. Checked 2026-09-25. [Gallagher | BBB Business Profile](https://www.bbb.org/us/il/rolling-meadows/profile/insurance-companies/gallagher-0654-23000270)

Reviewed 2026-09-25. [Read the sourced review](https://spot.insure/insurance-providers/gallagher/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/gallagher-vs-marsh-mclennan-agency/cyber.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)