---
title: "Marsh McLennan Agency vs WTW: Professional Liability (E&O) Insurance"
description: "WTW terms describe placement confirmation and policy-document review; MMA overview names its professional line scope."
canonical: "https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/professional-errors-omissions"
page-type: "line-comparison"
updated-at: "2026-09-30"
comparison-pair: "marsh-mclennan-agency-vs-wtw"
provider-a: "marsh-mclennan-agency"
provider-b: "wtw"
coverage-line: "professional-errors-omissions"
---

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

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

## Agent Guide

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

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

**Key facts:**
- Line: Professional Liability (E&O) Insurance. Providers: Marsh McLennan Agency and WTW.
- 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:**
- [Marsh McLennan Agency vs WTW](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw) — 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
- [Marsh McLennan Agency profile](https://spot.insure/insurance-providers/marsh-mclennan-agency) — provider profile (evidence)
- [WTW profile](https://spot.insure/insurance-providers/wtw) — provider profile (evidence)
- [Marsh McLennan Agency vs WTW Cargo and Transit Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/cargo-transit) — sibling comparison (other line, or other pair for this line)
- [Marsh McLennan Agency vs WTW Commercial Property Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/commercial-property) — sibling comparison (other line, or other pair for this line)
- [Marsh McLennan Agency vs WTW Crime Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/crime) — sibling comparison (other line, or other pair for this line)
- [Marsh McLennan Agency vs WTW Employment Practices Liability Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/employment-practices) — 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)
- [AIG vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-wtw/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [Alliance Risk vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-wtw/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)
- [At-Bay vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-wtw/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)
- [The Baldwin Group vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/baldwin-vs-wtw/professional-errors-omissions) — sibling comparison (other line, or other pair for this line)

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

WTW terms describe placement confirmation and policy-document review; MMA overview names its professional line scope.

## Research Scope and Use

Use this comparison to evaluate Marsh McLennan Agency and WTW 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.

## Summary

MMA’s overview names E&O and specialist architects-and-engineers and lawyers lines. WTW documents professional-liability solutions within FINEX and E&O among financial lines serving residential real-estate stakeholders, a narrower published description than a full policy outline. [3](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW")

## 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. [1](https://www.marshmma.com/us/mma/about-us.html "Who We Are") [2](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 WTW?

WTW is an insurance broker whose documented services include manufacturing risk-program design and specialist property and cargo programs. Its marketed property scope includes residential real-estate stakeholders and a separate integrated data-center program; other named capabilities vary in date and geography. [4](https://www.wtwco.com/en-us/industries/manufacturing "Manufacturing") [5](https://www.wtwco.com/en-us/solutions/products/digital-infrastructure-protector "Digital Infrastructure Protector") [6](https://www.wtwco.com/en-us/solutions/marine "Marine") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K")

[WTW profile](https://spot.insure/insurance-providers/wtw)

## 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. [10](https://www.tdi.texas.gov/commercial/pl-faq.html "FAQ: Professional liability insurance") [11](https://www.iii.org/article/professional-liability-insurance "Professional liability insurance") [12](https://www.sba.gov/counseling/launch-your-business/#business-insurance "Get business insurance") [13](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf "Professional Liability – US Direct Errors and Omissions Insurance")

## Key Differences in Professional Liability (E&O) Insurance

### Which Professional Work Is Named

WTW’s North American terms say it acts as an intermediary, seeks a formal insurer commitment after a client orders binding, and reviews policy documents against negotiated terms. MMA also describes arranging professional placement, but its overview does not spell out those binding and document-review steps; ask both teams who confirms the final policy matches the quote. [3](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K")

### Placement Scope and Buying Route

WTW’s materials identify E&O in financial lines for residential real-estate stakeholders, while MMA names architects-and-engineers and lawyers professional lines. If your business is outside those named examples, request the exact practice and form rather than infer availability from a broad professional-liability label. [3](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)")

## What to Confirm in Professional Liability (E&O) Insurance Quotes

- Which WTW team and policy form address your profession, and when will you receive the binder and final policy? [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K")
- Which MMA specialist will arrange the form, and who checks the issued policy against the proposal? [3](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA")

## Offering Details

| Criteria | Marsh McLennan Agency professional errors omissions (official overview) | WTW Professional Errors and Omissions Brokerage |
| --- | --- | --- |
| Role in This Line | Marsh McLennan Agency describes arranging professional errors omissions for the audience stated on the cited product page. [3](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..) | Under WTW's North American Corporate Risk & Broking terms, WTW normally acts as the client's insurance intermediary for engagements governed by those terms. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") (Evidence: Company-reported; scope: Terms for applicable North American Corporate Risk & Broking engagements. WTW also discloses separate insurer-side services in some arrangements; this does not determine the role in a specific engagement..) |
| Issuing Insurer | Confirm in your quote. | The reviewed WTW sources do not identify an issuing insurer for a specific professional errors omissions placement. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") (Evidence: Not publicly disclosed; scope: This is a gap in the cited marketing, annual-report, and brokerage materials; it does not mean WTW lacks insurer markets. Confirm the carrier on the quote and issued policy..) |
| Who It’s For | Organizations seeking professional liability placement; source does not imply all professions share one policy. [3](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..) | Confirm in your quote. |
| Coverage Features | 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. [3](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..) | WTW's FY2024 annual report describes professional-liability solutions within FINEX; its residential practice lists errors-and-omissions among financial lines for residential real-estate stakeholders. [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") (Evidence: Company-reported; scope: The report is historical and group-level; the residential E&O reference is segment-specific and based on retained official indexed text. Neither establishes current terms or eligibility outside that segment..) |
| Limits and Retentions | 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. [3](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..) | The reviewed sources do not state a buyer-specific professional errors omissions limit, retention, or deductible. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") [8](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm "WTW 2024 Form 10-K") [7](https://www.wtwco.com/en-us/industries/residential "Residential | WTW") (Evidence: Not publicly disclosed; scope: No limit or deductible is inferred from general marketing or WTW's brokerage role; the insurer's quote and issued forms control..) |
| Risk Services | Confirm in your quote. | WTW's North American terms describe reviewing binders, policies, and endorsements against the terms negotiated with the insurer. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") (Evidence: Company-reported; scope: Broker document-review process under the cited terms, when WTW handles this line's placement. It does not certify that a policy covers a claim or replace the issued wording..) |
| How to Apply | 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. [3](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..) | WTW's North American terms say an insurer quote is not confirmation of coverage; if the client orders binding, WTW seeks a formal insurer commitment, typically a binder. [9](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf "Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)") (Evidence: Company-reported; scope: Applies to placements governed by the cited North American Corporate Risk & Broking terms. It does not establish a self-service quote route or promise coverage availability for this line..) |

## Full Comparison

- [Marsh McLennan Agency vs WTW](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw): 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.
- [Marsh McLennan Agency vs WTW Cargo and Transit Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/cargo-transit)
- [Marsh McLennan Agency vs WTW Commercial Property Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/commercial-property)
- [Marsh McLennan Agency vs WTW Crime Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/crime)
- [Marsh McLennan Agency vs WTW Employment Practices Liability Insurance](https://spot.insure/compare/marsh-mclennan-agency-vs-wtw/employment-practices)
- [AIG vs Marsh McLennan Agency Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-marsh-mclennan-agency/professional-errors-omissions)
- [AIG vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-wtw/professional-errors-omissions)
- [Alliance Risk vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-wtw/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)
- [At-Bay vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/at-bay-vs-wtw/professional-errors-omissions)
- [The Baldwin Group vs WTW Professional Liability (E&O) Insurance](https://spot.insure/compare/baldwin-vs-wtw/professional-errors-omissions)

## Sources

### Marsh McLennan Agency

1. [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.
2. [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.
3. [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.

### WTW

4. [Manufacturing](https://www.wtwco.com/en-us/industries/manufacturing). WTW; “How WTW can help manufacturers”; “How we serve our clients”; North America licensed-entity disclaimer. Accessed 2026-09-28.
5. [Digital Infrastructure Protector](https://www.wtwco.com/en-us/solutions/products/digital-infrastructure-protector). WTW; Integrated policy coverage for building, operational property, marine and cargo under one policy; integrated data-center construction/operations; cyber and liability protection in broader solution; separate-policy preference caveat; capacity and North America licensed-entity disclaimer. Accessed 2026-09-29.
6. [Marine](https://www.wtwco.com/en-us/solutions/marine). WTW; “Our solutions” cargo brokerage; marine specialist count; claims advice and average-adjuster service; North America licensed-entity disclaimer. Accessed 2026-09-28.
7. [Residential | WTW](https://www.wtwco.com/en-us/industries/residential). WTW; “Specialized insurance products”: lists property insurance and financial lines, including errors and omissions; inspected official indexed text 2026-09-29. Direct reader access failed; indexed page crawl was about five months old.. Accessed 2026-09-29.
8. [WTW 2024 Form 10-K](https://www.sec.gov/Archives/edgar/data/1140536/000095017025026278/wtw-20241231.htm). U.S. Securities and Exchange Commission / Willis Towers Watson Public Limited Company; Part I, Item 1, FINEX and Surety business descriptions: the 2024 annual report identifies management and professional liability, employment practices, crime, cyber and M&A insurance solutions, and a global bond-placement team; indexed passages rechecked 2026-09-29.. Accessed 2026-09-29.
9. [Corporate Risk & Broking Brokerage Terms, Conditions & Disclosures (Canada & US)](https://www.wtwco.com/-/media/WTW/notices/BTCD-CRB-NA-June-2025.pdf). WTW; Document dated 2025-06-01; pp. 4–6: broker/intermediary role, quote versus binding process, review of binders/policies/endorsements, claims reporting and affiliate disclosures. Reused from the current WTW provider source record after direct PDF retrieval was blocked.. Accessed 2026-09-28.

### Professional Liability (E&O) Insurance Guide

10. [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.
11. [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.
12. [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.
13. [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 2026-09-30. 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.

## 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).

## WTW Reviews

Review Score: 8.1 / 10 from 1 rated source, equally weighted.

WTW has little useful review evidence for a business buyer. Its one counted score is 807 out of 1,000 from a 2017 J.D. Power study of large commercial brokers, and Trustpilot's 2.1 from 9 reviews isn't counted.

- BBB: Complaints 4. BBB's Willis Towers Watson Chicago business profile; four complaints displayed for the preceding three years as of 2026-09-29. All four are marked unpursuable; displayed matters concern pension or employee-benefit administration, not commercial insurance brokerage placements. Period: Last three years; 0 closed in the last 12 months; BBB page reviewed 2026-09-29. Checked 2026-09-29. [Willis Towers Watson: Complaints](https://www.bbb.org/us/il/chicago/profile/insurance-companies/willis-towers-watson-0654-8000152/complaints)
- J.D. Power: 2017 Overall Broker Customer Satisfaction Index 807 (out of 1000). US/Canada large-commercial broker customer-satisfaction studies, 2016 and 2017 editions. They do not describe present service or WTW small-business clients. The 2017 release reports 2,506 evaluations across the study, not a WTW-specific sample. Period: 2017 study; 2 Power Circles; 2,506 study-wide evaluations, WTW-specific count not stated. Checked 2026-09-29. [2016 Large Commercial Insurance Study](https://www.jdpower.com/system/files/legacy/assets/2016244_large_comm_insurance_.pdf); [2017 Large Commercial Insurance Study](https://www.jdpower.com/system/files/legacy/assets/2017222_large_commercial_insurance.pdf); [2016 Large Commercial Insurance Study](https://www.jdpower.com/business/press-releases/2016-large-commercial-insurance-study); [Diversity of Offerings Becomes Key Differentiator for Large Commercial Insurers, J.D. Power Finds](https://www.jdpower.com/business/press-releases/jd-power-2017-large-commercial-insurance-study)
- Trustpilot: TrustScore 2.1 (out of 5); 9 reviews. Global wtwco.com company page; nine reviews and a 2.1/5 TrustScore on 2026-09-29. Visible reviews predominantly concern pensions, employee benefits, investments or international consumer interactions; not a US commercial-insurance buyer sample. Period: Displayed 2026-09-29. Checked 2026-09-29. [wtwco.com Reviews](https://www.trustpilot.com/review/www.wtwco.com)

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

## Agent and Developer Resources

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