Aon vs 
Marsh McLennan Agency: How Do They Compare for Crime Insurance?
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. 1,2
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. 4,5
What Is Crime Insurance?
Crime insurance can help reimburse specified business losses from theft and fraud, including employee theft and forgery. Compare those protections separately and ask whether a payment sent after an impersonation scam is covered. 7,8,9,10,11
Key Differences in Crime Insurance
Practice focus and documented coverage scope
Aon identifies law, accounting and consulting firms as its professional-services audience and lists Crime as a coverage area. Marsh McLennan Agency names commercial crime and fidelity within its executive and professional liability offering, but the reviewed overview does not itemize events such as employee theft or computer fraud. Buyers should treat this as a product-category description and obtain the actual insuring agreement before deciding whether it fits their exposures. 3 6
Advisory and placement contact
Aon describes risk-management advice supported by industry knowledge, data and tools. Marsh McLennan Agency invites organizations to contact an advisor or specialist to discuss placement. Neither page specifies your insurer, limit or quote terms, so the practical next step is a detailed submission that names the dishonest acts and payment risks you need covered. 3 6
What to Confirm in Crime Insurance Quotes
- Ask Marsh McLennan Agency to identify the crime insuring agreements and exclusions in its proposal, including employee theft, third-party fraud and electronic transfers. 3 6
- Ask Aon and Marsh McLennan Agency to identify the proposed insurer, producer, limit, retention and whether crime is packaged with other coverage. 3 6
Review Scores
These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.
Aon
Review Score
3 rated sources
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.[4][6][7]
Read Aon reviewsMarsh McLennan Agency
Review Score
2 rated sources
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.[8][9][1]
Read Marsh McLennan Agency reviewsOffering Details
Aon vs Marsh McLennan Agency: Crime Insurance: documented features by provider
| Criteria | Aon Crime brokerage and risk-advisory offering | Marsh McLennan Agency crime (official overview) |
|---|---|---|
| Role in This Line | Aon presents Crime as a line its Professional Services Practice helps arrange or advise on for professional-service firms. Aon is describing a global brokerage and advisory service, not issuing the underlying policy. The producing legal entity and carrier for any particular placement are not named on this page. 3Company-reported. Aon’s global professional-services practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement. | Marsh McLennan Agency describes arranging crime for the audience stated on the cited product page. 6Company-reported. crime 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 practice page does not name the insurer or producing legal entity for a specific placement. Ask for both on the quote and binder. 3Not found in reviewed sources. Aon’s global practice page as reviewed 2026-09-30; no state-specific placement schedule or buyer quote was reviewed. This does not establish that Aon cannot arrange a placement. | Confirm in your quote. |
| Who It’s For | Aon identifies law, accounting and consulting firms as the audience for its global Professional Services Practice. That audience scope does not establish eligibility for every firm or other business. 3Company-reported. Audience described for Aon’s global professional-services practice. It does not establish U.S. state availability or underwriting eligibility for a placement. | Organizations seeking executive and professional liability solutions; the page describes a dedicated practice group. 6Company-reported. crime 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 lists Crime as a coverage area within its professional-services practice. The page does not describe covered dishonest acts, insured property, policy conditions or bond forms. 3Company-reported. Aon’s marketing description of the brokerage/coverage area. The page is not the insurer’s policy form and does not establish an insured's entitlement to coverage. | The cited product page describes commercial crime/fidelity as a named executive and professional liability product; the overview does not specify insured events or terms. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. 6Company-reported. crime 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 buyer-specific limit, retention, deductible or other placement terms. Confirm these in the quote, bond or issued policy. 3Not publicly disclosed. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy 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. 6Not publicly disclosed. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred. |
| Risk Services | Aon says its professional-services advisors use industry knowledge, insights, data and tools to support risk-management and human-capital decisions. This is a company-described advisory service, not a claim outcome or policy benefit. 3Company-reported. Company-reported advisory services on Aon’s global practice page; account-specific service scope is 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. 6Company-reported. crime 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
More Aon vs Marsh McLennan Agency Comparisons
Other Crime Insurance Comparisons
Sources
Aon
- Commercial Risk Solutions U.S. Brokerage Terms of Service. 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.
- 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.
- Professional Services Practice. Aon; Named professional-services audiences and global advisory role, lines 125–128; line offerings and explanations lines 131–190; contact link lines 120–122. Global practice page; no U.S. state or account-specific placement schedule. Accessed 2026-09-30.
Marsh McLennan Agency
- Who We Are. 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.
- Small Business Insurance Solutions. 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.
- Executive and Professional Liability | MMA. Marsh McLennan Agency; Policy suite lists commercial crime/fidelity among executive and professional liability offerings. Accessed 2026-09-30.
Crime Insurance Guide
- Commercial Insurance Guide. California Department of Insurance; Crime. Accessed 2026-09-16.
- Crime Non-Financial Applications and Forms. Travelers; Opening paragraph; Sample Policy Forms. Accessed 2026-09-16.
- Crime Terms and Conditions. The Travelers Companies, Inc.; I.A–G, printed/PDF pages 1–4; III.RR, printed/PDF p.13; V.B.1–2, printed/PDF pp.18–20; Consideration, printed/PDF p.1; III.P p.8; V.A.3 pp.16–17; V.A.4 p.17; V.B.3 p.20; I.A.3 p.1; III.C p.7; III.S pp.8–9; III.II and III.KK p.12; III.QQ p.13; V.A.5 pp.17–18 (printed/PDF pages); IV.J–O, printed/PDF pages 14–15. Accessed 2026-09-16.
- Commercial Crime Coverage Application. Travelers Casualty and Surety Company of America; I–III pages 1–2; IX–XI pages 3–4; V–VII, printed/PDF pages 2–3. Accessed 2026-09-16.
