Marsh McLennan Agency vs 
Simply Business: How Do They Compare for Professional Liability (E&O) Insurance?
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. 1,2
Read the Marsh McLennan Agency profile
Read the Marsh McLennan Agency Professional Liability (E&O) Insurance page
Simply Business: Online Small-Business Insurance Marketplace
Simply Business describes a digital marketplace and licensed-producer service for small businesses. The policy and selected insurer determine coverage, fees, servicing and claims responsibilities. 4,5
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. 7,8,9,10
Key Differences in Professional Liability (E&O) Insurance
Which Professional Work Is Named
Simply Business names consultants, IT professionals, real-estate agents, and bookkeepers as examples for E&O referrals; MMA names specialist professional lines including architects and engineers and lawyers. If your work spans a less typical profession, ask each about the specific class and form rather than treating the examples as eligibility guarantees. 3 6
Placement Scope and Buying Route
Simply Business describes an online process to answer business questions, compare quotes, and select a policy, subject to panel-member approval before binding. MMA asks organizations to contact an adviser or specialist, so the route differs before you see a bound offer. 3 5
What to Confirm in Professional Liability (E&O) Insurance Quotes
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.
Marsh 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 reviewsSimply Business
Review Score
4 rated sources
Customers disagree about Simply Business. Trustpilot shows 4.3 out of 5 from 1,901 reviews, but BBB customers give it 1.95 from 20 reviews and ConsumerAffairs shows 1.0.[6][10][7]
Read Simply Business reviewsOffering Details
Marsh McLennan Agency vs Simply Business: Professional Liability (E&O) Insurance: documented features by provider
| Criteria | Marsh McLennan Agency professional errors omissions (official overview) | Professional liability (E&O) insurance through Simply Business |
|---|---|---|
| Role in This Line | Marsh McLennan Agency describes arranging professional errors omissions for the audience stated on the cited product page. 3Company-reported. 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. |
| Who It’s For | Organizations seeking professional liability placement; source does not imply all professions share one policy. 3Company-reported. 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. | Simply Business lists consultants, IT professionals, real-estate agents and bookkeepers among the business examples for which it can help find E&O coverage. The examples do not guarantee eligibility. 6Company-reported. Company-published professional-errors-omissions information for U.S. small businesses; availability and actual policy terms depend on the insurer, state and buyer. |
| 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. 3Company-reported. 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. | The page describes protection for claims tied to professional work and lists attorney fees, court costs, settlements and judgments as costs that may be covered; policy wording controls. 6Company-reported. Company-published professional-errors-omissions information for U.S. small businesses; availability and actual policy terms depend on the insurer, state and buyer. |
| 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. 3Not publicly disclosed. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred. | Confirm in your quote. |
| 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. 3Company-reported. 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. | The company describes an online flow to answer business questions, compare quotes and select a policy. Its Terms say an online quote is not guaranteed and binding requires panel-member approval. 6,5Company-reported. Company-published professional-errors-omissions information for U.S. small businesses; availability and actual policy terms depend on the insurer, state and buyer. |
Full Comparison
More Marsh McLennan Agency vs Simply Business Comparisons
Other Professional Liability (E&O) Insurance Comparisons
Sources
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; E&O, architects and engineers, and lawyers professional lines are named in the policy suite. Accessed 2026-09-30.
Simply Business
- Our Small Business Insurance Story. Simply Business; Opening description and audience; digital marketplace, business types and U.S. service. Accessed 2026-09-29.
- Terms of Service. Simply Business; Dated June 30, 2026; §1 lines 22–28; §8 lines 87–113; §10 lines 143–149; §19 line 211. Accessed 2026-09-29.
- Professional Liability Insurance Coverage. Simply Business; Coverage lines 45–100; buyer examples lines 101–158; online quote steps lines 237–260. Accessed 2026-09-29.
Professional Liability (E&O) Insurance Guide
- FAQ: Professional liability insurance. 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.
- 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.
- Get business insurance. U.S. Small Business Administration; Six common types of business insurance table. Accessed 2026-09-16.
- Professional Liability – US Direct Errors and Omissions Insurance. 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.
