--- title: "Counterpart vs Marsh McLennan Agency: Professional Liability (E&O) Insurance" description: "Marsh McLennan Agency names architects-and-engineers and lawyers professional lines; Counterpart lists those and other separate professional programs." canonical: "https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/professional-errors-omissions" page-type: "line-comparison" updated-at: "2026-10-01" comparison-pair: "counterpart-vs-marsh-mclennan-agency" provider-a: "counterpart" provider-b: "marsh-mclennan-agency" 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/counterpart-vs-marsh-mclennan-agency/professional-errors-omissions) ## Agent Guide **What this page is:** Focused comparison of Counterpart 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 Counterpart 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:** - Counterpart vs Marsh McLennan Agency for Professional Liability (E&O) Insurance: how do they differ? - Which is better for Professional Liability (E&O) Insurance, Counterpart or Marsh McLennan Agency? - What does Counterpart 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 Counterpart or Marsh McLennan Agency? **Key facts:** - Line: Professional Liability (E&O) Insurance. Providers: Counterpart 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:** - [Counterpart vs Marsh McLennan Agency](https://spot.insure/compare/counterpart-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 - [Counterpart profile](https://spot.insure/insurance-providers/counterpart) — provider profile (evidence) - [Marsh McLennan Agency profile](https://spot.insure/insurance-providers/marsh-mclennan-agency) — provider profile (evidence) - [Counterpart vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/crime) — sibling comparison (other line, or other pair for this line) - [Counterpart vs Marsh McLennan Agency D&O Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/directors-officers) — sibling comparison (other line, or other pair for this line) - [Counterpart vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/employment-practices) — sibling comparison (other line, or other pair for this line) - [Counterpart vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/fiduciary) — sibling comparison (other line, or other pair for this line) - [Counterpart vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/general-liability) — sibling comparison (other line, or other pair for this line) - [AIG vs Counterpart Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-counterpart/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 Counterpart Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-counterpart/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 Counterpart Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-counterpart/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) # Counterpart vs Marsh McLennan Agency: How Do They Compare for Professional Liability (E&O) Insurance? Marsh McLennan Agency names architects-and-engineers and lawyers professional lines; Counterpart lists those and other separate professional programs. ## How to Use the Counterpart vs Marsh McLennan Agency Professional Liability (E&O) Insurance Comparison Use this comparison to evaluate Counterpart 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. ## Counterpart vs Marsh McLennan Agency Professional Liability (E&O) Insurance Summary Both catalogues identify separate professional specialties: Marsh McLennan Agency names A&E and lawyers lines, while Counterpart also lists allied-health and miscellaneous programs. [3](https://yourcounterpart.com/products/miscellaneous-professional "Professional & General Liability") [4](https://yourcounterpart.com/products/architects-and-engineers "Architects, Engineers, & Contractors Liability") [5](https://yourcounterpart.com/products/allied-healthcare "Allied Medical & Healthcare Liability") [6](https://yourcounterpart.com/products/lawyers-professional-liability "Lawyers Professional Liability Insurance") [10](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") ## What Is Counterpart Insurance? Counterpart describes a broker-focused platform for small businesses and lists management and professional liability programs. Buyers should compare the named profession, carrier, state, policy wording and any package component on the actual quote. [1](https://yourcounterpart.com/ "Counterpart | Agentic Insurance™") [2](https://yourcounterpart.com/about "About Counterpart") [Counterpart profile](https://spot.insure/insurance-providers/counterpart) ## 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 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. [11](https://www.tdi.texas.gov/commercial/pl-faq.html "FAQ: Professional liability insurance") [12](https://www.iii.org/article/professional-liability-insurance "Professional liability insurance") [13](https://www.sba.gov/counseling/launch-your-business/#business-insurance "Get business insurance") [14](https://www.hiscox.com/documents/pl-sample-policy-wording.pdf "Professional Liability – US Direct Errors and Omissions Insurance") ## What Are the Key Differences Between Counterpart and Marsh McLennan Agency Professional Liability (E&O) Insurance? ### Specialty Lines Named Marsh McLennan Agency’s product overview names E&O, architects-and-engineers and lawyers professional lines, and says those specialties are not one form. Counterpart names separate programs for A&E/contractors, lawyers, allied healthcare and miscellaneous professionals. A firm should match its actual work to the relevant specialty instead of treating the shared E&O label as evidence of equivalent forms. [3](https://yourcounterpart.com/products/miscellaneous-professional "Professional & General Liability") [4](https://yourcounterpart.com/products/architects-and-engineers "Architects, Engineers, & Contractors Liability") [5](https://yourcounterpart.com/products/allied-healthcare "Allied Medical & Healthcare Liability") [6](https://yourcounterpart.com/products/lawyers-professional-liability "Lawyers Professional Liability Insurance") [10](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") ### Comparing the Proposed Form The reviewed Marsh McLennan Agency overview identifies the named product lines but does not set universal terms; Counterpart’s pages include examples for selected professions, which are illustrative. For a buyer, the useful comparison is the proposed professional-services definition and the actual insurer and schedule, not the catalogue title. Request the wording for the precise specialty from either placement. [4](https://yourcounterpart.com/products/architects-and-engineers "Architects, Engineers, & Contractors Liability") [5](https://yourcounterpart.com/products/allied-healthcare "Allied Medical & Healthcare Liability") [6](https://yourcounterpart.com/products/lawyers-professional-liability "Lawyers Professional Liability Insurance") [10](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") ## What Should You Confirm in Counterpart and Marsh McLennan Agency Professional Liability (E&O) Insurance Quotes? - Marsh McLennan Agency: identify whether the proposal is its A&E, lawyers or another E&O line. Counterpart: confirm the selected class, insurer, and quote-specific limits and exclusions. [4](https://yourcounterpart.com/products/architects-and-engineers "Architects, Engineers, & Contractors Liability") [6](https://yourcounterpart.com/products/lawyers-professional-liability "Lawyers Professional Liability Insurance") [10](https://www.marshmma.com/us/solutions/executive-and-professional-liability.html "Executive and Professional Liability | MMA") ## Counterpart vs Marsh McLennan Agency Professional Liability (E&O) Compared | Criteria | Counterpart Professional Liability | Marsh McLennan Agency professional errors omissions (official overview) | | --- | --- | --- | | Role in This Line | Counterpart describes its product distribution through Counterpart Insurance Services, Inc. and wholesale brokers. [1](https://yourcounterpart.com/ "Counterpart | Agentic Insurance™") [7](https://knowledge.yourcounterpart.com/en/articles/4438791-how-can-i-get-insurance-through-counterpart "How can I get insurance through Counterpart?") (Evidence: Company-reported; scope: The cited marketing pages do not identify the insurer for a particular professional-liability risk or state..) | Marsh McLennan Agency describes arranging professional errors omissions for the audience stated on the cited product page. [10](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 | Counterpart lists distinct professional-liability programs for miscellaneous professionals, architects/engineers/contractors, allied healthcare and lawyers. [3](https://yourcounterpart.com/products/miscellaneous-professional "Professional & General Liability") [4](https://yourcounterpart.com/products/architects-and-engineers "Architects, Engineers, & Contractors Liability") [5](https://yourcounterpart.com/products/allied-healthcare "Allied Medical & Healthcare Liability") [6](https://yourcounterpart.com/products/lawyers-professional-liability "Lawyers Professional Liability Insurance") (Evidence: Company-reported; scope: Each page has its own occupation scope; no single eligibility rule applies across all four products..) | Organizations seeking professional liability placement; source does not imply all professions share one policy. [10](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 Lawyers Professional Liability page describes claims arising from lawyers’ professional services; the MPL page gives service-related negligence and financial-loss examples. [6](https://yourcounterpart.com/products/lawyers-professional-liability "Lawyers Professional Liability Insurance") [3](https://yourcounterpart.com/products/miscellaneous-professional "Professional & General Liability") (Evidence: Company-reported; scope: These are distinct program summaries and do not establish identical policy triggers or coverages..) | 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. [10](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 | Counterpart says its professional pages support modular limits and presents sample limits and retentions for selected professions. [3](https://yourcounterpart.com/products/miscellaneous-professional "Professional & General Liability") [6](https://yourcounterpart.com/products/lawyers-professional-liability "Lawyers Professional Liability Insurance") (Evidence: Company-reported; scope: Published examples are illustrative, not terms available to a particular applicant..) | 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/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 | 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/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 Counterpart vs Marsh McLennan Agency - [Counterpart vs Marsh McLennan Agency](https://spot.insure/compare/counterpart-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. - [Counterpart vs Marsh McLennan Agency Crime Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/crime) - [Counterpart vs Marsh McLennan Agency D&O Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/directors-officers) - [Counterpart vs Marsh McLennan Agency Employment Practices Liability Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/employment-practices) - [Counterpart vs Marsh McLennan Agency Fiduciary Liability Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/fiduciary) - [Counterpart vs Marsh McLennan Agency General Liability Insurance](https://spot.insure/compare/counterpart-vs-marsh-mclennan-agency/general-liability) - [AIG vs Counterpart Professional Liability (E&O) Insurance](https://spot.insure/compare/aig-vs-counterpart/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 Counterpart Professional Liability (E&O) Insurance](https://spot.insure/compare/alliance-risk-vs-counterpart/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 Counterpart Professional Liability (E&O) Insurance](https://spot.insure/compare/aon-vs-counterpart/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 Counterpart vs Marsh McLennan Agency ### Sources About Counterpart 1. [Counterpart | Agentic Insurance™](https://yourcounterpart.com/). Counterpart, Inc.; Current homepage: Quote Online CTA; brokers/small-business audiences; product list; performance claims; legal/footer qualifications, rendered lines 2–52, 55–70, 98–100, 282–287.. Accessed 2026-09-29. 2. [About Counterpart](https://yourcounterpart.com/about). Counterpart, Inc.; Carrier disclosure and Our Story; underwriters named at line 13; company focus lines 22–36. Financial-strength note says ratings are as of 2024-02-26.. Accessed 2026-09-29. 3. [Professional & General Liability](https://yourcounterpart.com/products/miscellaneous-professional). Counterpart, Inc.; Reopened 2026-09-30: page lines 4–8 says MPL may be purchased alone or packaged with GL; lines 208–245 describe industries and coverage examples; lines 251–283 describe risk assessment, quoting channels and underwriter access. Marketing page, not binding terms.. Accessed 2026-09-30. 4. [Architects, Engineers, & Contractors Liability](https://yourcounterpart.com/products/architects-and-engineers). Counterpart, Inc.; Retained provider source: A&E/contractor class examples, services, enhancements and illustrative limits; prior access 2026-09-28.. Accessed 2026-09-28. 5. [Allied Medical & Healthcare Liability](https://yourcounterpart.com/products/allied-healthcare). Counterpart, Inc.; Retained provider source: names allied healthcare classes, combined coverage/enhancements and illustrative limits/examples; does not establish conventional malpractice for every medical profession or standalone general liability. Prior access 2026-09-28; direct reopen failed in this session.. Accessed 2026-09-28. 6. [Lawyers Professional Liability Insurance](https://yourcounterpart.com/products/lawyers-professional-liability). Counterpart, Inc.; Reopened 2026-09-30: page lines 4–8 names lawyer-focused product; lines 236–272 company-stated geographic reach, modular liability limit examples, professional services, technology/media extensions and GL alongside professional cover. Product terms remain policy-specific.. Accessed 2026-09-30. 7. [How can I get insurance through Counterpart?](https://knowledge.yourcounterpart.com/en/articles/4438791-how-can-i-get-insurance-through-counterpart). Counterpart Knowledge Center; Retained source: article describes wholesale-broker referral route; prior access 2026-09-28.. Accessed 2026-09-28. ### Sources About 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. [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 11. [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. 12. [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. 13. [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. 14. [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. ## Counterpart Review Scores for 2026 Review Score: not enough ratings. We found no independent customer rating of Counterpart, so it has no Review Score. Its Trustpilot page shows no reviews, and BBB has no matching business. Reviewed 2026-09-29. [Read the sourced review](https://spot.insure/insurance-providers/counterpart/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/counterpart-vs-marsh-mclennan-agency/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)