What Is Marsh?
Marsh suits technology and larger businesses seeking specialist cyber placement or broad global risk advice; small firms wanting a quick standard quote should compare its MMA route or digital agencies. 1,2,3,4
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. 7,8
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. 10,11,12,13
Key Differences in Professional Liability (E&O) Insurance
Complex industry expertise versus listed small-business examples
Marsh names banking, insurance, investment, legal, design, technology and health sectors among the industries its professional-liability experts serve. Simply Business gives consultants, IT professionals, real-estate agents and bookkeepers as examples for E&O, while noting examples do not guarantee eligibility. A business in a regulated or specialized sector should ask Marsh how its practice fits the placement and submit the same detailed operations to Simply Business for an eligibility decision. 5 9
Marsh identifies additional allegation types
Marsh says professional-liability coverage can address liability and defense costs for alleged errors, omissions or negligence, and that many policies also cover privacy violations and computer-security breaches. Simply Business describes claims tied to professional work and lists legal costs that may be covered, subject to policy wording; its overview does not specify privacy or security allegations. If client data is part of your service, ask the proposed insurer whether those events fall within E&O or require separate cyber coverage. 5 9
Marsh describes a specialist assessment team
Marsh says its practice uses attorneys, economists and actuaries alongside coverage specialists to assess professional-liability exposure. Simply Business presents an online quote comparison process. Buyers with complex financial, contractual or technology exposures can ask how much specialist review each proposed placement includes before choosing a policy. 5 9
What to Confirm in Professional Liability (E&O) Insurance Quotes
- Ask Marsh and the Simply Business insurer whether the proposed E&O form covers privacy violations and security breaches, and whether cyber coverage is needed separately. 5 9
- For a specialized business, provide the same services and client profile to both; ask Simply Business which panel insurer is offering terms and who reviews the risk. 5 8
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
Review Score
2 rated sources
Marsh’s global Trustpilot profile has a poor 1.3/5 score. Treat it as a service warning to investigate with your proposed team; it does not isolate US commercial accounts.[2][4][7]
Read Marsh 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 vs Simply Business: Professional Liability (E&O) Insurance: documented features by provider
| Criteria | Marsh Professional Liability Insurance Brokerage | Professional liability (E&O) insurance through Simply Business |
|---|---|---|
| Role in This Line | Marsh's financial and professional liability practice places professional liability (errors and omissions) insurance; MMA also places E&O coverage within its executive and professional liability practice for middle-market clients. 5,6Company-reported. Marsh professional liability page and MMA executive and professional liability page. | Confirm in your quote. |
| Issuing Insurer | The reviewed pages do not name a specific professional liability insurer. 5,6Not publicly disclosed. Marsh professional liability page and MMA executive and professional liability page as read on 2026-09-23. | Confirm in your quote. |
| Who It’s For | Marsh names specialized industries its professional liability experts serve, including banking and broker/dealers, insurance companies and asset managers, merchant banking and venture capital, accountants, attorneys, architects and engineers, media and entertainment, technology, and healthcare and biotechnology. 5Company-reported. Marsh professional liability page, What We Offer section. | 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. 9Company-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 | Marsh says professional liability coverage can protect a company against liability and defense costs from a claim alleging an error, omission or negligence in performing professional services, and that many policies also cover privacy violations and computer security breaches. 5Company-reported. Marsh professional liability page opening description; illustrative policy description, not a specific policy form. | 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. 9Company-reported. Company-published professional-errors-omissions information for U.S. small businesses; availability and actual policy terms depend on the insurer, state and buyer. |
| Risk Services | Marsh says it employs attorneys, economists and actuaries alongside coverage specialists to assess a client's professional liability exposure from multiple angles, given the complexity of these risks. 5Company-reported. Marsh professional liability page. | Confirm in your quote. |
| How to Apply | Confirm in your quote. | 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. 9,8Company-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 vs Simply Business Comparisons
Other Professional Liability (E&O) Insurance Comparisons
Sources
Marsh
- Marsh | Leader in risk, strategy, people, and investments. Marsh; Hero and capability tiles; FAQ: What does Marsh do?; industries served; Is Marsh the same as Marsh McLennan? January 2026 brand change. Accessed 2026-09-16.
- Compensation guide for US clients. Marsh; US broking segments; broker role; retail commissions, client fees, wholesale, insurer consulting, contingent and supplemental commissions; Marsh LLC and Marsh USA LLC; page 3: broker role and Marsh & McLennan Agency segment; page 7: copyright © 2024 Marsh LLC. Accessed 2026-09-16.
- Marsh McLennan Agency (MMA). Marsh; Middle-market US organizations; wholly-owned subsidiary; business insurance, employee health and benefits, retirement, private client. Accessed 2026-09-16.
- Technology | Insurance Broking & Risk Management. Marsh; Opening Technology Practice description; practice links including data center insurance, fintech and Stratus; Talk to us. Accessed 2026-09-16.
- Professional liability. Marsh; Opening description; What We Offer: specialized industries served (banking, insurance/asset managers, merchant banking/venture capital, accountants/attorneys/architects/engineers, media/communications/entertainment, technology, healthcare/biotechnology). Accessed 2026-09-23.
- Expert Executive and Professional Liability Insurance. Marsh McLennan Agency; Our policies include D&O, E&O, EPL, commercial crime/fidelity, network security privacy risk/cyber, fiduciary, media liability, IP, architects and engineers, lawyers professional, and kidnap and ransom. Accessed 2026-09-23.
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.
